WO2015115252A1 - 熱サイクル用作動媒体、熱サイクルシステム用組成物および熱サイクルシステム - Google Patents
熱サイクル用作動媒体、熱サイクルシステム用組成物および熱サイクルシステム Download PDFInfo
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- WO2015115252A1 WO2015115252A1 PCT/JP2015/051409 JP2015051409W WO2015115252A1 WO 2015115252 A1 WO2015115252 A1 WO 2015115252A1 JP 2015051409 W JP2015051409 W JP 2015051409W WO 2015115252 A1 WO2015115252 A1 WO 2015115252A1
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K5/00—Heat-transfer, heat-exchange or heat-storage materials, e.g. refrigerants; Materials for the production of heat or cold by chemical reactions other than by combustion
- C09K5/02—Materials undergoing a change of physical state when used
- C09K5/04—Materials undergoing a change of physical state when used the change of state being from liquid to vapour or vice versa
- C09K5/041—Materials undergoing a change of physical state when used the change of state being from liquid to vapour or vice versa for compression-type refrigeration systems
- C09K5/044—Materials undergoing a change of physical state when used the change of state being from liquid to vapour or vice versa for compression-type refrigeration systems comprising halogenated compounds
- C09K5/045—Materials undergoing a change of physical state when used the change of state being from liquid to vapour or vice versa for compression-type refrigeration systems comprising halogenated compounds containing only fluorine as halogen
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K5/00—Heat-transfer, heat-exchange or heat-storage materials, e.g. refrigerants; Materials for the production of heat or cold by chemical reactions other than by combustion
- C09K5/02—Materials undergoing a change of physical state when used
- C09K5/04—Materials undergoing a change of physical state when used the change of state being from liquid to vapour or vice versa
- C09K5/041—Materials undergoing a change of physical state when used the change of state being from liquid to vapour or vice versa for compression-type refrigeration systems
- C09K5/044—Materials undergoing a change of physical state when used the change of state being from liquid to vapour or vice versa for compression-type refrigeration systems comprising halogenated compounds
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2205/00—Aspects relating to compounds used in compression type refrigeration systems
- C09K2205/10—Components
- C09K2205/12—Hydrocarbons
- C09K2205/122—Halogenated hydrocarbons
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2205/00—Aspects relating to compounds used in compression type refrigeration systems
- C09K2205/10—Components
- C09K2205/12—Hydrocarbons
- C09K2205/126—Unsaturated fluorinated hydrocarbons
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2205/00—Aspects relating to compounds used in compression type refrigeration systems
- C09K2205/22—All components of a mixture being fluoro compounds
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2205/00—Aspects relating to compounds used in compression type refrigeration systems
- C09K2205/40—Replacement mixtures
Definitions
- the present invention relates to a thermal cycle working medium, a thermal cycle system composition including the same, and a thermal cycle system using the composition.
- CFC chlorofluorocarbons
- HCFC hydrochlorofluorocarbons
- HFC-32 difluoromethane
- HFC-125 pentafluoroethane
- R410A a quasi-azeotropic refrigerant mixture having a mass ratio of 1: 1 between HFC-32 and HFC-125
- HFC may cause global warming.
- R410A has been widely used for ordinary air-conditioning equipment called so-called package air conditioners and room air conditioners because of its high refrigerating capacity.
- GWP global warming potential
- the global warming potential (GWP) is as high as 2088, and therefore development of a low GWP working medium is required.
- R410A is simply replaced and the devices that have been used so far continue to be used.
- HFO olefins
- HFC saturated HFC
- HFC is referred to as HFC, and is used separately from HFO.
- HFC is specified as a saturated hydrofluorocarbon.
- Patent Document 1 discloses a technique related to a working medium using 1,1,2-trifluoroethylene (HFO-1123) that has the above-described characteristics and provides excellent cycle performance. Is disclosed. Patent Document 1 further attempts to use HFO-1123 in combination with various HFCs and HFOs for the purpose of improving the nonflammability and cycle performance of the working medium.
- Patent Document 2 discloses a technique related to a working medium using 1,2-difluoroethylene (HFO-1132).
- the present invention has a cycle performance that can replace R410A in a working medium used for a thermal cycle system while sufficiently suppressing the influence on global warming, and the load on the apparatus is larger than when R410A is used. It is an object of the present invention to provide a working medium that does not greatly increase and can be used stably without taking any special measures, a composition for a heat cycle system including the same, and a heat cycle system using the composition.
- the present invention provides a working medium for heat cycle, a composition for heat cycle system, and a heat cycle system having the configurations described in [1] to [10] below.
- a working medium for heat cycle having the following characteristics (A-1) to (E-1).
- A-1) Intergovernmental Panel on Climate Change (IPCC) Fourth report of global warming potential (100 years) is less than 300.
- B-1) The product of the relative refrigeration capacity (RQ R410A ) calculated by the following formula (X) and the relative coefficient of performance (RCOP R410A ) calculated by the following formula (Y) is 0.820 or more.
- R410A represents a mixture of difluoromethane and pentafluoroethane at a mass ratio of 1: 1, and the specimen represents a working medium to be evaluated relative to the specimen.
- the refrigeration capacity of the specimen and R410A Is the output (kW) when the reference refrigeration cycle is operated under the following temperature condition (T) using the specimen and R410A
- the coefficient of performance of the specimen and R410A is the output (kW) of the specimen and R410A.
- Each is a value divided by the power consumption (kW) required for the operation.
- Evaporation temperature is 0 ° C (however, in the case of a non-azeotropic mixture, the average temperature between the evaporation start temperature and the evaporation completion temperature), and the condensation temperature is 40 ° C (however, in the case of a non-azeotropic mixture, the condensation start temperature and condensation completion) Average temperature), the degree of supercooling (SC) is 5 ° C., and the degree of superheating (SH) is 5 ° C. (C-1)
- the relative pressure (RDP R410A ) calculated by the following formula (Z) is 1.100 or less.
- R410A represents a mixture of difluoromethane and pentafluoroethane at a mass ratio of 1: 1, and the specimen represents a working medium to be relatively evaluated.
- the specimen and the compressor discharge gas of R410A The pressure is the compressor discharge gas pressure when the reference refrigeration cycle is operated under the temperature condition (T) using the specimen and R410A.
- D-1) The lower limit of the combustion range measured in accordance with Method A in the High Pressure Gas Safety Law is 5% by volume or more.
- E-1) Pressure does not exceed 2.00 MPaG in a combustion test under conditions of 0.98 MPaG and 250 ° C. by equipment conforming to Method A for measuring the combustion range in the High Pressure Gas Safety Law.
- [7] The working medium according to any one of [1] to [6], wherein the working medium does not have a combustion range.
- a composition for a heat cycle system comprising the heat cycle working medium according to any one of [1] to [7] and a refrigerating machine oil.
- the heat cycle system according to [9] wherein the heat cycle system is a refrigeration / refrigeration device, an air conditioning device, a power generation system, a heat transport device, or a secondary cooler.
- the working medium used in the thermal cycle system has cycle performance that can be replaced with R410A while sufficiently suppressing the influence on global warming, and can be applied to the apparatus as compared with the case where R410A is used. It is possible to provide a working medium that does not increase greatly in load and can be used continuously without special measures and a composition for a heat cycle system including the working medium.
- the thermal cycle system of the present invention is a thermal cycle system to which a composition for a thermal cycle system that can be substituted for R410A and has little influence on global warming is applied without applying any special measures to the apparatus.
- FIG. 2 is a cycle diagram in which a change in state of a working medium in the refrigeration cycle system of FIG. 1 is described on a pressure-enthalpy diagram.
- working medium The working medium for heat cycle of the present invention (hereinafter also simply referred to as “working medium”) has the following characteristics (A-1) to (E-1).
- (C-1) The relative pressure (RDP R410A ) calculated by the above formula (Z) is 1.100 or less.
- D-1 The lower limit of the combustion range measured in accordance with Method A in the High Pressure Gas Safety Law is 5% by volume or more. Hereinafter, the lower limit of the combustion range is also referred to as “combustion lower limit”.
- E-1) Pressure does not exceed 2.00 MPaG in a combustion test under conditions of 0.98 MPaG and 250 ° C. by equipment conforming to Method A for measuring the combustion range in the High Pressure Gas Safety Law. “G” after the pressure unit MPa indicates a gauge pressure.
- self-decomposability the property in which the pressure exceeds 2.00 MPaG in the combustion test is referred to as “self-decomposability”.
- (A) GWP, (B) relative cycle performance (vs. R410A), (C) relative pressure (RDP R410A ), (D) lower combustion limit, and (E) self-decomposable physical properties are used as indicators. And satisfying the conditions shown in the above (A-1) to (E-1) for each of (A) to (E) was an essential condition of the working medium.
- (A) to (E) will be described.
- GWP GWP is an index that measures the influence of a working medium on global warming.
- GWP in the mixture is a weighted average based on the composition mass.
- the working medium of the embodiment of the present invention has a GWP of 2088 for R410A that aims to be substituted, which has a great influence on the global environment.
- the GWP of the working medium according to the embodiment of the present invention is less than 300 as defined in (A-1).
- the working medium according to the embodiment of the present invention has a cycle performance substantially equal to the cycle performance of R410A as described later, and as described above, the working medium is extremely low for GWP and has a small effect on global warming. It is.
- the GWP of the working medium of the embodiment is preferably 250 or less, more preferably 200 or less, and particularly preferably 150 or less.
- the relative cycle performance (vs. R410A) is an index indicating the cycle performance of the working medium by relative comparison with the cycle performance of R410A as an alternative target.
- the relative cycle performance (vs R410A) is given as a product of a relative refrigeration capacity (RQ R410A ) and a relative coefficient of performance (RCOP R410A ) described below.
- the working medium according to the embodiment of the present invention has a relative cycle performance (vs. R410A) of 0.820 or more as indicated by (B-1).
- vs. R410A relative cycle performance
- the relative cycle performance (relative to R410A) of the working medium of the embodiment is preferably 0.900 or more, more preferably 0.950 or more, and particularly preferably 1.000 or more.
- the upper limit of the relative cycle performance (vs. R410A) in the working medium of the embodiment is not particularly limited.
- the cycle performance is a performance required when the working medium is applied to the thermal cycle, and is evaluated by a coefficient of performance and ability.
- the capacity is a refrigeration capacity.
- the refrigeration capacity also referred to as “Q” in the present specification
- Q is an output in the refrigeration cycle system.
- the coefficient of performance also referred to as “COP” in this specification
- COP is a value obtained by dividing the output (kW) by the power (kW) consumed to obtain the output (kW), which corresponds to the energy consumption efficiency. To do. The higher the coefficient of performance, the greater the output can be obtained with fewer inputs.
- the relative cycle performance (vs. R410A) in order to use the relative cycle performance (vs. R410A) as an index, a reference refrigeration cycle having the following temperature condition (T) was used. Under this condition, the relative refrigeration capacity of the working medium with respect to R410A is a relative refrigeration capacity (RQ R410A ) obtained by the following formula (X). Similarly, the relative coefficient of performance with respect to R410A of the working medium under this condition is a relative coefficient of performance (RCOP R410A ) obtained by the following equation (Y). In the formulas (X) and (Y), the specimen indicates a working medium to be relatively evaluated.
- T Evaporation temperature: 0 ° C (however, in the case of a non-azeotropic mixture, the average temperature between the evaporation start temperature and the evaporation completion temperature) Condensation temperature: 40 ° C (in the case of non-azeotropic mixtures, the average temperature between the condensation start temperature and the condensation completion temperature) Supercooling degree (SC): 5 ° C Superheat (SH): 5 ° C
- Examples of the reference refrigeration cycle system used for the evaluation include a refrigeration cycle system whose schematic configuration is shown in FIG.
- a method for obtaining the refrigeration capacity and the coefficient of performance of a predetermined working medium using the refrigeration cycle system shown in FIG. 1 will be described.
- a refrigeration cycle system 10 shown in FIG. 1 cools and liquefies a compressor 11 that compresses the working medium vapor A into a high-temperature and high-pressure working medium vapor B and the working medium vapor B discharged from the compressor 11.
- the condenser 12 as a low-temperature and high-pressure working medium C
- the expansion valve 13 that expands the working medium C discharged from the condenser 12 to form a low-temperature and low-pressure working medium D
- the working medium D discharged from the expansion valve 13 Is composed of an evaporator 14 that heats the working medium vapor A to a high-temperature and low-pressure working medium vapor A, a pump 15 that supplies a load fluid E to the evaporator 14, and a pump 16 that supplies a fluid F to the condenser 12.
- the working medium C discharged from the condenser 12 is expanded by the expansion valve 13 to obtain a low-temperature and low-pressure working medium D (hereinafter referred to as “CD process”).
- the working medium D discharged from the expansion valve 13 is heated by the load fluid E in the evaporator 14 to obtain high-temperature and low-pressure working medium vapor A. At this time, the load fluid E is cooled to become the load fluid E ′ and discharged from the evaporator 14 (hereinafter referred to as “DA process”).
- the refrigeration cycle system 10 is a cycle system including adiabatic / isoentropic change, isoenthalpy change, and isopressure change.
- the state change of the working medium is described on the pressure-enthalpy line (curve) diagram shown in FIG. 2, it can be expressed as a trapezoid having A, B, C, and D as apexes.
- the AB process is a process in which adiabatic compression is performed by the compressor 11 to convert the high-temperature and low-pressure working medium vapor A into a high-temperature and high-pressure working medium vapor B, which is indicated by an AB line in FIG.
- the working medium vapor A is introduced into the compressor 11 in an overheated state, and the obtained working medium vapor B is also an overheated vapor.
- the compressor discharge gas pressure (discharge pressure) used for calculation of (C) relative pressure (RDP R410A ) described later is the pressure (DP) in the state B in FIG. 2, and is the maximum pressure in the refrigeration cycle.
- the temperature in the state B is the compressor discharge gas temperature (discharge temperature), which is the maximum temperature in the refrigeration cycle.
- the BC process is a process in which the condenser 12 performs isobaric cooling to convert the high-temperature and high-pressure working medium vapor B into a low-temperature and high-pressure working medium C, and is indicated by a BC line in FIG.
- the pressure at this time is the condensation pressure.
- Pressure - an intersection T 1 of the high enthalpy side condensing temperature of the intersection of the enthalpy and BC line, the low enthalpy side intersection T 2 is the condensation boiling temperature.
- the CD process is a process in which isenthalpy expansion is performed by the expansion valve 13 and the low-temperature and high-pressure working medium C is used as the low-temperature and low-pressure working medium D, and is indicated by a CD line in FIG. Incidentally, if Shimese the temperature in the working medium C of low temperature and high pressure at T 3, T 2 -T 3 is (i) ⁇ supercooling degree of the working medium in the cycle of (iv) (SC).
- the DA process is a process of performing isobaric heating in the evaporator 14 to return the low-temperature and low-pressure working medium D to the high-temperature and low-pressure working medium vapor A, and is indicated by a DA line in FIG.
- the pressure at this time is the evaporation pressure.
- Pressure - intersection T 6 of the high enthalpy side of the intersection of the enthalpy and DA line is evaporating temperature. If Shimese the temperature of the working medium vapor A in T 7, T 7 -T 6 is (i) ⁇ superheat of the working medium in the cycle of (iv) (SH).
- T 4 indicates the temperature of the working medium D.
- thermodynamic properties necessary for calculating the cycle performance of the working medium can be calculated based on a generalized equation of state (Soave-Redrich-Kwong equation) based on the corresponding state principle and thermodynamic relational equations. If characteristic values are not available, calculation is performed using an estimation method based on the group contribution method.
- Q indicated by (h A -h D ) corresponds to the output (kW) of the refrigeration cycle, and is required for operating the compression work indicated by (h B -h A ), for example, the compressor.
- the amount of electric power corresponds to the consumed power (kW).
- Q means the ability to freeze the load fluid, and the higher Q means that more work can be done in the same heat cycle system. In other words, when having a large Q, it indicates that the target performance can be obtained with a small amount of working medium, and the thermal cycle system can be downsized.
- the relative refrigeration capacity (RQ R410A ) and the relative coefficient of performance (RCOP R410A ) in the working medium of the embodiment satisfy the above condition (B-1), and the relative refrigeration capacity (RQ R410A ) is 0. .820 or more is preferable, and the relative coefficient of performance (RCOP R410A ) is preferably 0.960 or more. More preferably, the relative refrigeration capacity (RQ R410A ) is 0.950 or more, and the relative coefficient of performance (RCOP R410A ) is 0.980 or more.
- Relative pressure (RDP R410A ) is an indicator that shows the load on the working medium device relative to the load on the R410A device as an alternative.
- the relative pressure (RDP R410A ) is the compressor discharge gas pressure (DP sample ) when the reference refrigeration cycle of the temperature condition (T) is operated using the working medium (sample) as shown in the following formula (Z). ) Of the compressor discharge gas pressure (DP R410A ) when operated at R410A .
- the compressor discharge gas pressure indicates the maximum pressure in the reference refrigeration cycle of the above temperature condition (T), and based on this value, the actual refrigeration / refrigeration equipment, air conditioning equipment, etc. using the working medium
- T temperature condition
- the degree of pressure load on the apparatus when the thermal cycle system is operated can be assumed.
- the working medium of the embodiment of the present invention has a relative pressure (RDP R410A ) of 1.100 or less as indicated by (C-1). If the relative pressure (RDP R410A ) of the working medium of the embodiment is 1.100 or less, when the thermal cycle system is operated using a predetermined apparatus under a predetermined condition using the working medium, R410A As compared with the case where the thermal cycle system is operated by the same apparatus under the same conditions using the pressure, the pressure load on the apparatus hardly increases. That is, by satisfying the condition of (C-1), it is possible to use the working medium of the embodiment without particular design change for the apparatus using R410A as the working medium.
- the relative pressure (RDP R410A ) of the working medium of the embodiment is preferably 1.000 or less.
- the lower limit of the relative pressure (RDP R410A ) in the working medium of the embodiment is not particularly limited.
- the combustion lower limit is the range of the volume concentration (%) of the working medium relative to the total amount of working medium and air, that is, when the working medium is mixed with air, that is, the combustion range. Is the lower limit of.
- the combustion range is a combustion range measured in accordance with Method A in the High Pressure Gas Safety Law.
- Measured in accordance with Method A in the High Pressure Gas Safety Law includes measurement by the Method A in the High Pressure Gas Safety Law, and is changed to a method other than the above method, for example, a range that can be substituted for the method. It is measured by the measured measuring method.
- the lower limit of combustion may be quoted from literature values obtained by the measurement method exemplified above. Further, when the working medium is a mixture, it may be actually measured by the measurement method exemplified above, or may be calculated as a weighted average based on the molar composition of each compound constituting the working medium using the lower combustion limit. Good.
- the working medium of the embodiment of the present invention has a combustion lower limit of 5% by volume or more, as indicated by (D-1).
- the combustion lower limit of the working medium of the embodiment is 5% by volume or more, that is, by satisfying the condition (D-1), for example, when a working medium leaks from a refrigeration / refrigeration apparatus or an air conditioner, In a normal environment, it can cope with predetermined measures without having strong flammability like hydrocarbon refrigerants such as propane, butane and isobutane.
- the lower limit of combustion of the working medium of the embodiment is preferably 7% or more, and more preferably 10% or more.
- the working medium of the embodiment does not have a combustion range.
- An upper limit when the working medium of the embodiment has a combustion range is not particularly limited. However, in consideration of the fact that it does not become a combustible gas under the High Pressure Gas Safety Law, it is preferable that the combustion lower limit is 10% or more and the difference between the upper limit and the lower limit of the combustion range is 20% or more.
- the working medium according to the embodiment of the present invention does not have self-degradability. That is, the working medium of the embodiment is, as shown in (E-1), in a combustion test under conditions of 0.98 MPaG and 250 ° C. by equipment conforming to Method A for measuring the combustion range in the high-pressure gas safety method. The pressure does not exceed 2.00 MPaG. That is, this combustion test has a characteristic that does not substantially change the temperature and pressure.
- the working medium of the embodiment continues to ensure stable operation in long-term operation without taking special measures in thermal cycle systems such as refrigeration / refrigeration equipment and air conditioning equipment. Stable use is possible.
- the (E) self-decomposability evaluation of the working medium in the present invention is specifically recommended as a facility for measuring the combustion range in a gas containing a halogen-containing gas in the individual notification in the High Pressure Gas Safety Law.
- the following method is used using equipment complying with the law.
- a specimen working medium
- a spherical pressure vessel with an internal volume of 650 cm 3 controlled to a predetermined temperature (250 ° C.) from the outside
- platinum installed inside
- An energy of about 30 J is applied by fusing the wire.
- the presence or absence of a self-decomposition reaction is confirmed by measuring temperature and pressure changes in the pressure vessel generated after application.
- the initial pressure of 0.98 MPaG has no significant pressure increase when the pressure after application is in the range of 0.98 MPaG to 2.00 MPa.
- the initial temperature of 250 ° C. does not increase means that the temperature after application is in the range of 250 ° C. to 260 ° C.
- Table 1 The characteristics of the working medium according to the embodiment of the present invention described above are summarized in Table 1 below.
- rows are physical property items (A) to (E) for evaluating characteristics
- columns are physical property values (1) to (4).
- (1) is an essential requirement
- (2) is a preferred range
- (3) is a more preferred range
- (4) is a particularly preferred range.
- the range (less than 300) in column (1) of row (A) (GWP) corresponds to the requirement (A-1).
- the range of (B) to (E) rows and (1) columns in Table 1 corresponds to (B-1) to (E-1).
- the working medium of the embodiment of the present invention includes (A)-(1), (B)-(1), (C)-(1), (D)-(1) and (E)-( It is essential to satisfy the condition 1).
- a heat cycle system using a heat exchanger such as a condenser or an evaporator is used without particular limitation.
- a heat cycle system for example, a refrigeration cycle
- a gas working medium is compressed by a compressor, cooled by a condenser to produce a high-pressure liquid, the pressure is reduced by an expansion valve, and vaporized at a low temperature by an evaporator. It has a mechanism that takes heat away with heat.
- composition of the working medium for heat cycle of the present invention is not particularly limited as long as it satisfies all the conditions (A-1) to (E-1).
- the working medium may consist of a single compound or a mixture.
- a compound that is generally known and that alone satisfies all the above conditions (A-1) to (E-1) is not known. Therefore, as a method of obtaining the working medium of the embodiment satisfying all the conditions (A-1) to (E-1), for example, a combination of compounds constituting the working medium is selected as follows. And a method of adjusting the content of each selected compound so as to satisfy the conditions (A-1) to (E-1).
- the GFO is essentially low, and the HFO (singlely satisfying the condition (A-1) ( Combinations of compounds comprising at least one HFC) having a carbon-carbon double bond are preferred.
- HFO-1123 HFO-1132 (Z) which is a cis isomer of HFO-1132
- HFO-1132 (E) which is a trans isomer
- 2,3,3,3-tetrafluoropropene HFO- 1234yf
- 2-fluoropropene HFO-1261yf
- 1,1,2-trifluoropropene HFO-1243yc
- trans-1,2,3,3,3-pentafluoropropene HFO-1225ye (E)
- trans-1,3,3,3-tetrafluoropropene HFO-1234ze (E)
- cis- 1,3,3,3-tetrafluoropropene HFO-1234ze (Z)
- 3,3,3-trifluoropropene H O-1243zf
- a compound having a high relative cycle performance for example, a compound that satisfies the condition (B-1) or that can satisfy the condition (B-1) in combination with other compounds select.
- examples of such compounds include HFO-1123, HFO-1132 (Z), and HFO-1132 (E).
- the GWP of HFO-1123 is 0.3 as a value measured according to the IPCC Fourth Evaluation Report. Also, the GWPs of HFO-1132 (Z) and HFO-1132 (E) are not described in the IPCC Fourth Assessment Report, and other HFO GWPs such as HFO-1234ze (E), HFO-1234ze (Z) 6), 4 of HFO-1234yf, etc., the GWP can be assumed to be 10 or less.
- Table 2 shows the physical property values of (A) to (E) of HFO-1123, HFO-1132 (Z), and HFO-1132 (E) under the conditions (A-1) to Shown with (E-1).
- physical property values of (A) to (E) of R410A to be substituted by the working medium of the embodiment are also shown.
- HFO-1123, HFO-1132 (Z), and HFO-1132 (E) physical properties that have not been achieved to values that are satisfactory as the working medium of the embodiment. Taking these physical property values into consideration, the physical properties already satisfied in HFO-1123, HFO-1132 (Z), and HFO-1132 (E) should not be out of the range of the working medium of the embodiment. While holding, a combination with a compound capable of supplementing physical properties not achieved to a satisfactory value as the working medium of the embodiment is performed. Examples of such compounds include HFO and HFC other than HFO-1123, HFO-1132 (Z), and HFO-1132 (E).
- the relative cycle performance is at a certain level or more, the relative pressure (RDP R410A ) is low, and it does not have self-degradability.
- HFO is preferred. Specific examples include HFO-1234ze (E), HFO-1234ze (Z), HFO-1234yf, and the like.
- the HFC is appropriately selected as a working medium as a mixture with the above HFO, particularly from the viewpoint of keeping the GWP in the range of (A-1) and the relative cycle performance in the range of (B-1). It is preferable.
- HFCs examples include HFC-32, difluoroethane, trifluoroethane, tetrafluoroethane, pentafluoroethane (HFC-125), pentafluoropropane, hexafluoropropane, heptafluoropropane, pentafluorobutane, heptafluorocyclopentane and the like. It is done. From the above viewpoint, HFC-32, 1,1-difluoroethane (HFC-152a), 1,1,2,2-tetrafluoroethane (HFC-134), 1,1,1,2-tetrafluoroethane (HFC-134a) ) Is preferred.
- the HFC combined with the HFO-1123, HFO-1132 (Z), HFO-1132 (E), etc. has a relatively low GWP, for example, 1500 or less, a high relative cycle performance and / or a relative pressure (RDP R410A HFCs having a low self-degradability are preferred.
- RDP R410A HFCs having a low self-degradability are preferred.
- Specific examples include HFC-32 and HFC-134a, and HFC-32 is particularly preferable.
- Table 3 shows the physical property values of (A) to (E) of HFO-1234ze (E), HFO-1234yf, HFC-32, and HFC-134a under the conditions (A-1 ) To (E-1).
- physical property values of (A) to (E) of R410A to be substituted by the working medium of the embodiment are also shown.
- HFO-1123, HFO-1132 (Z), and HFO-1132 (E) are self-decomposable when used alone, HFO-1123, HFO-1132 (Z), or HFO-1132 with respect to the total amount of the working medium.
- the ratio of (E) is a ratio that does not have at least self-degradability in each compound.
- HFO-1123, HFO-1234yf, HFO-1234ze (E), and HFC-32 are combined in a predetermined ratio. It can also be a working medium. Further, as long as (A-1) to (E-1) are satisfied, the operation of the present invention is performed by combining HFO-1123 with HFO or HFC other than those combined in the above (i-1) to (i-3). It can also be a medium.
- preferable combinations of the compounds when using HFO-1132 (Z) include the following combinations.
- the mass% in the following description is mass% when the whole working medium is 100 mass%.
- (Ii-1) 60 to 70% by mass of HFO-1132 (Z) and 30 to 40% by mass of HFC-32.
- (Ii-2) 20-40% by mass of HFO-1132 (Z), 20-40% by mass of HFO-1234yf, and 40-44% by mass of HFC-32.
- the present invention combines HFO-1132 (Z) with HFO or HFC other than those combined in (ii-1) and (ii-2) above. It is also possible to use a working medium.
- preferable combinations of the compounds when using HFO-1132 (E) include the following combinations.
- the mass% in the following description is mass% when the whole working medium is 100 mass%.
- HFO-1132 (E) is combined with HFO or HFC other than those combined in (iii-1) to (iii-3) above.
- the working medium of the invention can also be used.
- components other than HFO and HFC include carbon dioxide, hydrocarbons, chlorofluoroolefin (CFO), hydrochlorofluoroolefin (HCFO), and the like.
- CFO chlorofluoroolefin
- HCFO hydrochlorofluoroolefin
- components that have little influence on the ozone layer and little influence on global warming are preferable.
- hydrocarbon examples include propane, propylene, cyclopropane, butane, isobutane, pentane, and isopentane.
- a hydrocarbon may be used individually by 1 type and may be used in combination of 2 or more type.
- the working medium contains a hydrocarbon
- the content thereof is less than 10% by weight with respect to 100% by weight of the working medium, preferably 1 to 5% by weight, and more preferably 3 to 5% by weight. If a hydrocarbon is more than a lower limit, the solubility of the mineral refrigeration oil to a working medium will become more favorable.
- CFO examples include chlorofluoropropene and chlorofluoroethylene.
- CFO 1,1-dichloro-2,3,3,3-tetrafluoropropene (CFO-1214ya), 1 is easy to suppress the flammability of the working medium without greatly reducing the cycle performance of the working medium.
- CFO-1214yb 3-dichloro-1,2,3,3-tetrafluoropropene (CFO-1214yb) and 1,2-dichloro-1,2-difluoroethylene (CFO-1112) are preferred.
- One type of CFO may be used alone, or two or more types may be used in combination.
- the working medium contains CFO
- the content thereof is less than 10% by weight with respect to 100% by weight of the working medium, preferably 1 to 8% by weight, and more preferably 2 to 5% by weight. If the CFO content is at least the lower limit value, it is easy to suppress the combustibility of the working medium. If the content of CFO is not more than the upper limit value, good cycle performance can be easily obtained.
- HCFO examples include hydrochlorofluoropropene and hydrochlorofluoroethylene.
- HCFO 1-chloro-2,3,3,3-tetrafluoropropene (HCFO-1224yd)
- 1-chloro can be used because flammability of the working medium can be easily suppressed without greatly reducing the cycle performance of the working medium.
- -1,2-difluoroethylene (HCFO-1122) is preferred.
- HCFO may be used alone or in combination of two or more.
- the content of HCFO in 100% by mass of the working medium is less than 10% by mass, preferably 1 to 8% by mass, and more preferably 2 to 5% by mass. If the content of HCFO is equal to or higher than the lower limit value, it is easy to suppress the combustibility of the working medium. If the content of HCFO is not more than the upper limit value, good cycle performance can be easily obtained.
- the working medium used in the composition for a heat cycle system of the present invention contains the other components as described above, the total content of the other components in the working medium is less than 10% by mass with respect to 100% by mass of the working medium. 8 mass% or less is preferable, and 5 mass% or less is more preferable.
- composition for thermal cycle system The working medium of the present invention can be used as a composition for a heat cycle system of the present invention by mixing with a refrigerating machine oil when applied to a heat cycle system.
- the composition for a heat cycle system of the present invention containing the working medium of the present invention and refrigerating machine oil may further contain known additives such as a stabilizer and a leak detection substance.
- refrigerating machine oil a known refrigerating machine oil used for a composition for a heat cycle system can be employed without particular limitation, together with a working medium made of a halogenated hydrocarbon.
- the refrigerating machine oil include oxygen-containing synthetic oils (such as ester-based refrigerating machine oils, ether-based refrigerating machine oils), fluorine-based refrigerating machine oils, mineral-based refrigerating machine oils, and hydrocarbon-based synthetic oils.
- ester refrigerating machine oils include dibasic acid ester oils, polyol ester oils, complex ester oils, and polyol carbonate oils.
- the dibasic acid ester oil includes a dibasic acid having 5 to 10 carbon atoms (glutaric acid, adipic acid, pimelic acid, suberic acid, azelaic acid, sebacic acid, etc.) and a carbon number having a linear or branched alkyl group.
- Esters with 1 to 15 monohydric alcohols methanol, ethanol, propanol, butanol, pentanol, hexanol, heptanol, octanol, nonanol, decanol, undecanol, dodecanol, tridecanol, tetradecanol, pentadecanol, etc. are preferred.
- ditridecyl glutarate di (2-ethylhexyl) adipate, diisodecyl adipate, ditridecyl adipate, di (3-ethylhexyl) sebacate and the like.
- Polyol ester oils include diols (ethylene glycol, 1,3-propanediol, propylene glycol, 1,4-butanediol, 1,2-butanediol, 1,5-pentadiol, neopentyl glycol, 1,7- Heptanediol, 1,12-dodecanediol, etc.) or polyol having 3 to 20 hydroxyl groups (trimethylolethane, trimethylolpropane, trimethylolbutane, pentaerythritol, glycerin, sorbitol, sorbitan, sorbitol glycerin condensate, etc.); Fatty acids having 6 to 20 carbon atoms (hexanoic acid, heptanoic acid, octanoic acid, nonanoic acid, decanoic acid, undecanoic acid, dodecanoic acid, eicosanoic acid,
- Polyol ester oils include esters of hindered alcohols (neopentyl glycol, trimethylol ethane, trimethylol propane, trimethylol butane, pentaerythritol, etc.) (trimethylol propane tripelargonate, pentaerythritol 2-ethylhexanoate). And pentaerythritol tetrapelargonate) are preferred.
- hindered alcohols neopentyl glycol, trimethylol ethane, trimethylol propane, trimethylol butane, pentaerythritol, etc.
- trimel propane tripelargonate pentaerythritol 2-ethylhexanoate
- pentaerythritol tetrapelargonate are preferred.
- the complex ester oil is an ester of a fatty acid and a dibasic acid, a monohydric alcohol and a polyol.
- fatty acid, dibasic acid, monohydric alcohol, and polyol the same ones as described above can be used.
- the polyol carbonate oil is an ester of carbonic acid and polyol.
- examples of the polyol include the same diol as described above and the same polyol as described above.
- the polyol carbonate oil may be a ring-opening polymer of cyclic alkylene carbonate.
- ether refrigerating machine oil examples include polyvinyl ether oil and polyoxyalkylene oil.
- polyvinyl ether oil examples include those obtained by polymerizing vinyl ether monomers such as alkyl vinyl ether, and copolymers obtained by copolymerizing vinyl ether monomers and hydrocarbon monomers having olefinic double bonds.
- a vinyl ether monomer may be used individually by 1 type, and may be used in combination of 2 or more type.
- hydrocarbon monomers having an olefinic double bond examples include ethylene, propylene, various butenes, various pentenes, various hexenes, various heptenes, various octenes, diisobutylene, triisobutylene, styrene, ⁇ -methylstyrene, various alkyl-substituted styrenes, etc. Is mentioned.
- the hydrocarbon monomer which has an olefinic double bond may be used individually by 1 type, and may be used in combination of 2 or more type.
- the polyvinyl ether copolymer may be either a block or a random copolymer.
- a polyvinyl ether oil may be used individually by 1 type, and may be used in combination of 2 or more type.
- polyoxyalkylene oil examples include polyoxyalkylene monools, polyoxyalkylene polyols, alkyl etherified products of polyoxyalkylene monools and polyoxyalkylene polyols, and esterified products of polyoxyalkylene monools and polyoxyalkylene polyols.
- Polyoxyalkylene monools and polyoxyalkylene polyols are used to open a C 2-4 alkylene oxide (ethylene oxide, propylene oxide, etc.) in an initiator such as water or a hydroxyl group-containing compound in the presence of a catalyst such as an alkali hydroxide. Examples thereof include those obtained by a method of addition polymerization.
- the oxyalkylene units in the polyalkylene chain may be the same in one molecule, or two or more oxyalkylene units may be included. It is preferable that at least an oxypropylene unit is contained in one molecule.
- the initiator used for the reaction examples include water, monohydric alcohols such as methanol and butanol, and polyhydric alcohols such as ethylene glycol, propylene glycol, pentaerythritol, and glycerol.
- the polyoxyalkylene oil is preferably an alkyl etherified product or an esterified product of polyoxyalkylene monool or polyoxyalkylene polyol.
- the polyoxyalkylene polyol is preferably polyoxyalkylene glycol.
- an alkyl etherified product of polyoxyalkylene glycol in which the terminal hydroxyl group of polyoxyalkylene glycol is capped with an alkyl group such as a methyl group, called polyglycol oil is preferable.
- fluorinated refrigerating machine oil examples include compounds in which hydrogen atoms of synthetic oils (mineral oil, poly ⁇ -olefin, alkylbenzene, alkylnaphthalene, etc. described later) are substituted with fluorine atoms, perfluoropolyether oils, fluorinated silicone oils, and the like. It is done.
- mineral-based refrigeration oil refrigerating machine oil fraction obtained by atmospheric distillation or vacuum distillation of crude oil is refined (solvent removal, solvent extraction, hydrocracking, solvent dewaxing, catalytic dewaxing, hydrogenation) Paraffinic mineral oil, naphthenic mineral oil, etc., which are refined by appropriately combining refining, clay treatment, etc.).
- hydrocarbon synthetic oil examples include poly ⁇ -olefin, alkylbenzene, alkylnaphthalene and the like.
- Refrigerating machine oil may be used individually by 1 type, and may be used in combination of 2 or more type.
- the refrigerating machine oil is preferably at least one selected from polyol ester oil, polyvinyl ether oil, and polyglycol oil from the viewpoint of compatibility with the working medium.
- the content of the refrigerating machine oil in the composition for a heat cycle system may be in a range that does not significantly reduce the effect of the present invention, and is preferably 10 to 100 parts by weight, preferably 20 to 50 parts by weight with respect to 100 parts by weight of the working medium. Part is more preferred.
- thermal cycle systems contains arbitrarily is a component which improves the stability of the working medium with respect to a heat
- a known stabilizer used in a heat cycle system together with a working medium composed of a halogenated hydrocarbon, for example, an oxidation resistance improver, a heat resistance improver, a metal deactivator, etc. is not particularly limited. Can be adopted.
- oxidation resistance improver and heat resistance improver examples include N, N′-diphenylphenylenediamine, p-octyldiphenylamine, p, p′-dioctyldiphenylamine, N-phenyl-1-naphthylamine, and N-phenyl-2-naphthylamine.
- the oxidation resistance improver and the heat resistance improver may be used alone or in combination of two or more.
- metal deactivators examples include imidazole, benzimidazole, 2-mercaptobenzthiazole, 2,5-dimethylcaptothiadiazole, salicyridin-propylenediamine, pyrazole, benzotriazole, toltriazole, 2-methylbenzamidazole, 3,5- Dimethylpyrazole, methylenebis-benzotriazole, organic acids or their esters, primary, secondary or tertiary aliphatic amines, amine salts of organic or inorganic acids, heterocyclic nitrogen-containing compounds, alkyl acid phosphates Amine salts thereof or derivatives thereof.
- the content of the stabilizer in the composition for the heat cycle system may be in a range that does not significantly reduce the effect of the present invention, and is preferably 5 parts by mass or less, preferably 1 part by mass or less with respect to 100 parts by mass of the working medium. More preferred.
- Examples of the leak detection substance optionally contained in the composition for a heat cycle system include an ultraviolet fluorescent dye, an odor gas, an odor masking agent, and the like.
- the ultraviolet fluorescent dyes are described in U.S. Pat. No. 4,249,412, JP-T-10-502737, JP-T 2007-511645, JP-T 2008-500437, JP-T 2008-531836.
- odor masking agent examples include known fragrances used in heat cycle systems, together with working media composed of halogenated hydrocarbons, such as those described in JP-T-2008-500337 and JP-A-2008-531836. Can be mentioned.
- a solubilizing agent that improves the solubility of the leak detection substance in the working medium may be used.
- solubilizer examples include those described in JP-T 2007-511645, JP-T 2008-500337, JP-T 2008-531836.
- the content of the leak detection substance in the composition for a heat cycle system may be in a range that does not significantly reduce the effect of the present invention, and is preferably 2 parts by mass or less, based on 100 parts by mass of the working medium, and 0.5 mass. Part or less is more preferable.
- the thermal cycle system of the present invention is a system using the composition for a thermal cycle system of the present invention.
- the heat cycle system of the present invention may be a heat pump system that uses warm heat obtained by a condenser, or may be a refrigeration cycle system that uses cold heat obtained by an evaporator.
- thermal cycle system of the present invention examples include refrigeration / refrigeration equipment, air conditioning equipment, power generation systems, heat transport devices, and secondary coolers.
- the thermal cycle system of the present invention can exhibit thermal cycle performance stably and safely even in a higher temperature operating environment, it is preferably used as an air conditioner that is often installed outdoors.
- the thermal cycle system of the present invention is also preferably used as a refrigeration / refrigeration apparatus.
- the air conditioner include room air conditioners, packaged air conditioners (store packaged air conditioners, building packaged air conditioners, facility packaged air conditioners, etc.), gas engine heat pumps, train air conditioners, automobile air conditioners, and the like.
- refrigeration / refrigeration equipment include showcases (built-in showcases, separate showcases, etc.), commercial freezers / refrigerators, vending machines, ice makers, and the like.
- a power generation system using a Rankine cycle system is preferable.
- the working medium is heated by geothermal energy, solar heat, waste heat in the middle to high temperature range of about 50 to 200 ° C in the evaporator, and the working medium turned into high-temperature and high-pressure steam is expanded.
- An example is a system in which power is generated by adiabatic expansion by a machine, and a generator is driven by work generated by the adiabatic expansion.
- the heat cycle system of the present invention may be a heat transport device.
- a latent heat transport device is preferable.
- Examples of the latent heat transport device include a heat pipe and a two-phase sealed thermosyphon device that transport latent heat using phenomena such as evaporation, boiling, and condensation of a working medium enclosed in the device.
- the heat pipe is applied to a relatively small cooling device such as a cooling device for a heat generating part of a semiconductor element or an electronic device. Since the two-phase closed thermosyphon does not require a wig and has a simple structure, it is widely used for a gas-gas heat exchanger, for promoting snow melting on roads, and for preventing freezing.
- a method for controlling the moisture concentration in the thermal cycle system a method using a moisture removing means such as a desiccant (silica gel, activated alumina, zeolite, etc.) can be mentioned.
- the desiccant is preferably brought into contact with the liquid thermal cycle system composition in terms of dehydration efficiency. For example, it is preferable to place a desiccant at the outlet of the condenser 12 or the inlet of the evaporator 14 to contact the composition for the thermal cycle system.
- a zeolitic desiccant is preferable from the viewpoint of chemical reactivity between the desiccant and the composition for the heat cycle system and the moisture absorption capacity of the desiccant.
- the main component is a compound represented by the following formula (3) from the viewpoint of excellent hygroscopic capacity. Zeolite desiccants are preferred.
- M is a Group 1 element such as Na or K, or a Group 2 element such as Ca
- n is the valence of M
- x and y are values determined by the crystal structure.
- pore diameter and breaking strength are important.
- a desiccant having a pore size larger than the molecular diameter of the working medium contained in the composition for the heat cycle system is used, the working medium is adsorbed in the desiccant, and as a result, a chemical reaction between the working medium and the desiccant.
- undesirable phenomena such as generation of non-condensable gas, decrease in the strength of the desiccant, and decrease in adsorption ability occur.
- a zeolitic desiccant having a small pore size as the desiccant.
- a sodium / potassium A type synthetic zeolite having a pore diameter of 3.5 angstroms or less is preferable.
- the size of the zeolitic desiccant is preferably about 0.5 to 5 mm because if it is too small, it will cause clogging of valves and piping details of the heat cycle system, and if it is too large, the drying ability will be reduced.
- the shape is preferably granular or cylindrical.
- the zeolitic desiccant can be formed into an arbitrary shape by solidifying powdery zeolite with a binder (such as bentonite).
- a binder such as bentonite
- Other desiccants silicon gel, activated alumina, etc.
- the use ratio of the zeolitic desiccant with respect to the composition for a heat cycle system is not particularly limited.
- non-condensable gas when non-condensable gas is mixed in the heat cycle system, it adversely affects heat transfer in the condenser and the evaporator and increases in operating pressure. Therefore, it is necessary to suppress mixing as much as possible.
- oxygen which is one of non-condensable gases, reacts with the working medium and refrigerating machine oil to promote decomposition.
- the non-condensable gas concentration is preferably 1.5% by volume or less, particularly preferably 0.5% by volume or less in terms of volume ratio to the working medium in the gas phase part of the working medium.
- Examples 1 to 22 a working medium in which HFO-1123 and at least one of HFO-1234yf, HFC-32, and HFO-1234ze (E) were mixed in the ratios shown in Tables 5 to 7 was prepared.
- Example 23 to 26 a working medium in which HFO-1132 (Z) and at least one of HFO-1234yf and HFC-32 were mixed in the ratios shown in Tables 8 and 9 was prepared, and the above method was used.
- Example 27 to 34 a working medium in which HFO-1132 (E) and at least one of HFO-1234yf and HFC-32 were mixed in the ratios shown in Tables 10 and 11 was prepared, and the above method was used.
- Comparative Examples 1 to 54 a working medium in which at least one HFO and at least one other HFO, HFC, hydrocarbon, and HCFO were mixed at a ratio shown in Tables 12 to 20 was prepared, (A) GWP, (B) Relative cycle performance (vs R410A), (C) Relative pressure (RDP R410A ), (D) Lower combustion limit, (E) Self-decomposability was measured, calculated and determined. The results are shown in Tables 12-20.
- the composition for a heat cycle system of the present invention and the heat cycle system using the composition are refrigeration / refrigeration equipment (built-in showcase, separate-type showcase, commercial refrigeration / refrigerator, vending machine, ice maker, etc.) , Air conditioners (room air conditioners, store packaged air conditioners, building packaged air conditioners, facility packaged air conditioners, gas engine heat pumps, train air conditioners, automotive air conditioners, etc.), power generation systems (waste heat recovery power generation, etc.), heat transport It can be used for equipment (heat pipe, etc.).
- refrigeration / refrigeration equipment built-in showcase, separate-type showcase, commercial refrigeration / refrigerator, vending machine, ice maker, etc.
- Air conditioners room air conditioners, store packaged air conditioners, building packaged air conditioners, facility packaged air conditioners, gas engine heat pumps, train air conditioners, automotive air conditioners, etc.
- power generation systems waste heat recovery power generation, etc.
- heat transport It can be used for equipment (heat pipe, etc.).
- 2014-030857 (filed on February 20, 2014), Japanese Patent Application No. 2014-033345 (filed on February 24, 2014), Japanese Patent Application No. 2014-053765 (filed on March 17, 2014), Japanese Patent Application No. 2014-055603 (filed on March 18, 2014), Japanese Patent Application No. 2014-118163 (filed on June 6, 2014), Japanese Patent Application No. 2014-118164 (filed on June 6, 2014), Japanese Patent Application No. 2014-118165 (filed on June 6, 2014), Japanese Patent Application No. 2014-118166 (filed on June 6, 2014), Japanese Patent Application No. 2014-118167 (filed on June 6, 2014), Japanese Patent Application No. 2014-127744 (filed on June 20, 2014), Japanese Patent Application No. 2014-127745 (filed on June 20, 2014), Japanese Patent Application No.
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Abstract
Description
従来、冷凍機用冷媒、空調機器用冷媒、発電システム(廃熱回収発電等)用作動媒体、潜熱輸送装置(ヒートパイプ等)用作動媒体、二次冷却媒体等の熱サイクルシステム用の作動媒体としては、クロロトリフルオロメタン、ジクロロジフルオロメタン等のクロロフルオロカーボン(CFC)、クロロジフルオロメタン等のヒドロクロロフルオロカーボン(HCFC)が用いられてきた。しかし、CFCおよびHCFCは、成層圏のオゾン層への影響が指摘され、現在、規制の対象となっている。
(A-1)気候変動に関する政府間パネル(IPCC)第4次報告による地球温暖化係数(100年)が300未満である。
(B-1)下記式(X)で算出される相対冷凍能力(RQR410A)と下記式(Y)で算出される相対成績係数(RCOPR410A)の積が0.820以上である。
[温度条件(T)]
蒸発温度が0℃(ただし、非共沸混合物の場合は、蒸発開始温度と蒸発完了温度の平均温度)、凝縮温度が40℃(ただし、非共沸混合物の場合は、凝縮開始温度と凝縮完了温度の平均温度)、過冷却度(SC)が5℃、および過熱度(SH)が5℃である。
(C-1)下記式(Z)で算出される相対圧力(RDPR410A)が1.100以下である。
(D-1)高圧ガス保安法におけるA法に準拠して測定される燃焼範囲の下限が5体積%以上である。
(E-1)高圧ガス保安法における燃焼範囲測定のためのA法に準拠する設備による0.98MPaG、250℃の条件下での燃焼試験において、圧力が2.00MPaGを超えることがない。
[3] 前記地球温暖化係数が200以下である、[1]の作動媒体。
[4] 前記相対成績係数(RCOPR410A)と相対冷凍能力(RQR410A)の積が0.900以上である、[1]~[3]のいずれかの作動媒体。
[5] 前記相対成績係数(RCOPR410A)と相対冷凍能力(RQR410A)の積が0.950以上である、[4]の作動媒体。
[6] 前記相対圧力(RDPR410A)が1.000以下である、[1]~[5]のいずれかの作動媒体。
[7] 作動媒体が燃焼範囲を有しない、[1]~[6]のいずれかの作動媒体。
[8] [1]~[7]のいずれかの熱サイクル用作動媒体と、冷凍機油とを含む、熱サイクルシステム用組成物。
[9] [8]の熱サイクルシステム用組成物を用いた、熱サイクルシステム。
[10] 前記熱サイクルシステムが冷凍・冷蔵機器、空調機器、発電システム、熱輸送装置または二次冷却機である、[9]の熱サイクルシステム。
本発明の熱サイクルシステムは、装置に特別な措置を施すことなく、R410Aと代替可能であり、かつ地球温暖化への影響が少ない熱サイクルシステム用組成物が適用された熱サイクルシステムである。
[作動媒体]
本発明の熱サイクル用作動媒体(以下、単に「作動媒体」ともいう。)は、下記(A-1)~(E-1)の特性を備える。
(B-1)上記式(X)で算出される相対冷凍能力(RQR410A)と上記式(Y)で算出される相対成績係数(RCOPR410A)の積が0.820以上である。以下の説明において、上記積を「相対サイクル性能(対R410A)」または単に「相対サイクル性能」ともいう。
(D-1)高圧ガス保安法におけるA法に準拠して測定される燃焼範囲の下限が5体積%以上である。以下、上記燃焼範囲の下限を「燃焼下限」ともいう。
(E-1)高圧ガス保安法における燃焼範囲測定のためのA法に準拠する設備による0.98MPaG、250℃の条件下での燃焼試験において、圧力が2.00MPaGを超えることがない。なお、圧力単位MPaの後ろの「G」はゲージ圧を示す。以下、上記燃焼試験において圧力が2.00MPaGを超える性質を「自己分解性」という。
GWPは、作動媒体の地球温暖化への影響をはかる指標である。本明細書において、混合物におけるGWPは、組成質量による加重平均とする。本発明の実施形態の作動媒体が、代替を目指すR410AのGWPは2088であり地球環境への影響が大きい。一方、本発明の実施形態の作動媒体のGWPは、(A-1)で規定したとおり300未満である。
相対サイクル性能(対R410A)は、作動媒体のサイクル性能を、代替の対象としてのR410Aのサイクル性能との相対比較により示す指標である。相対サイクル性能(対R410A)は、具体的には、以下に説明する相対冷凍能力(RQR410A)と相対成績係数(RCOPR410A)の積として与えられる。相対冷凍能力(RQR410A)と相対成績係数(RCOPR410A)の積を指標とすることで、一つの指標で作動媒体における能力と効率をバランスよく評価することが可能となる。
蒸発温度;0℃(ただし、非共沸混合物の場合は、蒸発開始温度と蒸発完了温度の平均温度)
凝縮温度;40℃(ただし、非共沸混合物の場合は、凝縮開始温度と凝縮完了温度の平均温度)
過冷却度(SC);5℃
過熱度(SH);5℃
(i)蒸発器14から排出された作動媒体蒸気Aを圧縮機11にて圧縮して高温高圧の作動媒体蒸気Bとする(以下、「AB過程」という。)。
(ii)圧縮機11から排出された作動媒体蒸気Bを凝縮器12にて流体Fによって冷却し、液化して低温高圧の作動媒体Cとする。この際、流体Fは加熱されて流体F’となり、凝縮器12から排出される(以下、「BC過程」という。)。
(iv)膨張弁13から排出された作動媒体Dを蒸発器14にて負荷流体Eによって加熱して高温低圧の作動媒体蒸気Aとする。この際、負荷流体Eは冷却されて負荷流体E’となり、蒸発器14から排出される(以下、「DA過程」という。)。
機器効率による損失、および配管、熱交換器における圧力損失はないものとする。
COP=Q/圧縮仕事=(hA-hD)/(hB-hA) …(12)
相対圧力(RDPR410A)は、作動媒体の装置に対する負荷を、代替の対象としてのR410Aの装置への負荷との相対比較により示す指標である。相対圧力(RDPR410A)は、下記式(Z)に示されるとおり、上記温度条件(T)の基準冷凍サイクルを、作動媒体(検体)を用いて運転した場合の圧縮機吐出ガス圧力(DP検体)の、R410Aで運転した場合の圧縮機吐出ガス圧力(DPR410A)に対する比の値で示される。
燃焼下限とは、作動媒体が空気と混合した際に、所定の条件で燃焼可能となる、作動媒体と空気の全量に対する作動媒体の体積濃度(%)の範囲、すなわち燃焼範囲の下限値である。本発明において燃焼範囲は高圧ガス保安法におけるA法に準拠して測定される燃焼範囲とする。
本発明の実施形態の作動媒体は、自己分解性を有しない。すなわち、実施形態の作動媒体は、(E-1)に示すとおり、高圧ガス保安法における燃焼範囲測定のためのA法に準拠する設備による0.98MPaG、250℃の条件下での燃焼試験において、圧力が2.00MPaGを超えることがない。すなわち、この燃焼試験において、実質的に温度および圧力に変化を与えない特性を有する。
実施形態の作動媒体は(E-1)の条件を満たすことにより、冷凍・冷蔵機器や空調機器等の熱サイクルシステムにおいて、特別な措置を施さなくとも長期稼働における安定運転状態の確保等、継続した安定使用が可能である。
上記の本発明の熱サイクル用作動媒体は、上記(A-1)~(E-1)の全ての条件を満足する作動媒体であれば、組成は特に限定されない。作動媒体は単一の化合物からなってもよく、混合物であってもよい。ただし、一般に知られる化合物で、単独で上記(A-1)~(E-1)の全ての条件を満足する化合物は知られていない。そこで、上記(A-1)~(E-1)の全ての条件を満足する実施形態の作動媒体を得る方法としては、例えば、以下のようにして作動媒体を構成する化合物の組み合わせを選択し、選択された各化合物の含有量を(A-1)~(E-1)の条件を満足するように調整する方法が挙げられる。
(i-2)HFO-1123の10~70質量%とHFO-1234yfの10~50質量%とHFC-32の10~40質量%
(i-3)HFO-1123の20~50質量%とHFO-1234ze(E)の20~40質量%とHFC-32の10~40質量%
(ii-2)HFO-1132(Z)の20~40質量%とHFO-1234yfの20~40質量%とHFC-32の40~44質量%
(iii-2)HFO-1132(E)の20~70質量%とHFO-1234yfの10~40質量%とHFC-32の20~40質量%
実施形態の作動媒体においては、(A-1)~(E-1)を満足するかぎり、必要に応じてHFOやHFC以外の、HFOやHFCとともに気化、液化する他の成分等を共に用いてもよい。
本発明の作動媒体は、熱サイクルシステムへの適用に際して、通常、冷凍機油と混合して本発明の熱サイクルシステム用組成物として使用することができる。本発明の作動媒体と冷凍機油を含む本発明の熱サイクルシステム用組成物は、これら以外にさらに、安定剤、漏れ検出物質等の公知の添加剤を含有してもよい。
冷凍機油としては、従来からハロゲン化炭化水素からなる作動媒体とともに、熱サイクルシステム用組成物に用いられる公知の冷凍機油が特に制限なく採用できる。冷凍機油として具体的には、含酸素系合成油(エステル系冷凍機油、エーテル系冷凍機油等)、フッ素系冷凍機油、鉱物系冷凍機油、炭化水素系合成油等が挙げられる。
なお、これらのポリオールエステル油は、遊離の水酸基を有していてもよい。
ポリオールとしては、上述と同様のジオールや上述と同様のポリオールが挙げられる。また、ポリオール炭酸エステル油としては、環状アルキレンカーボネートの開環重合体であってもよい。
ビニルエーテルモノマーは、1種を単独で用いてもよく、2種以上を組み合わせて用いてもよい。
冷凍機油としては、作動媒体との相溶性の点から、ポリオールエステル油、ポリビニルエーテル油およびポリグリコール油から選ばれる1種以上が好ましい。
熱サイクルシステム用組成物が任意に含有する安定剤は、熱および酸化に対する作動媒体の安定性を向上させる成分である。安定剤としては、従来からハロゲン化炭化水素からなる作動媒体とともに、熱サイクルシステムに用いられる公知の安定剤、例えば、耐酸化性向上剤、耐熱性向上剤、金属不活性剤等が特に制限なく採用できる。
紫外線蛍光染料としては、米国特許第4249412号明細書、特表平10-502737号公報、特表2007-511645号公報、特表2008-500437号公報、特表2008-531836号公報に記載されたもの等、従来、ハロゲン化炭化水素からなる作動媒体とともに、熱サイクルシステムに用いられる公知の紫外線蛍光染料が挙げられる。
本発明の熱サイクルシステムは、本発明の熱サイクルシステム用組成物を用いたシステムである。本発明の熱サイクルシステムは、凝縮器で得られる温熱を利用するヒートポンプシステムであってもよく、蒸発器で得られる冷熱を利用する冷凍サイクルシステムであってもよい。
発電システムとして、具体的には、蒸発器において地熱エネルギー、太陽熱、50~200℃程度の中~高温度域廃熱等により作動媒体を加熱し、高温高圧状態の蒸気となった作動媒体を膨張機にて断熱膨張させ、該断熱膨張によって発生する仕事によって発電機を駆動させ、発電を行うシステムが例示される。
ただし、Mは、Na、K等の1族の元素またはCa等の2族の元素であり、nは、Mの原子価であり、x、yは、結晶構造にて定まる値である。Mを変化させることにより細孔径を調整できる。
熱サイクルシステム用組成物が含有する作動媒体の分子径よりも大きい細孔径を有する乾燥剤を用いた場合、作動媒体が乾燥剤中に吸着され、その結果、作動媒体と乾燥剤との化学反応が生じ、不凝縮性気体の生成、乾燥剤の強度の低下、吸着能力の低下等の好ましくない現象を生じることとなる。
熱サイクルシステム用組成物に対するゼオライト系乾燥剤の使用割合は、特に限定されない。
なお、以下の実施例および比較例において、GWPおよび燃焼下限はそれぞれ上記の方法にしたがって各化合物単体の値を用いて計算により求めた。各化合物単体の値としては、上記表2、表3および下記表4に示す値を用いた。
実施例1~22において、HFO-1123と、HFO-1234yf、HFC-32およびHFO-1234ze(E)の少なくとも1種と、を表5~7に示す割合で混合した作動媒体を作製し、上記の方法で、(A)GWP、(B)相対サイクル性能(対R410A)、(C)相対圧力(RDPR410A)、(D)燃焼下限、(E)自己分解性を測定、算出、判定した。結果を表5~7に示す。
実施例23~26において、HFO-1132(Z)と、HFO-1234yfおよびHFC-32の少なくとも1種と、を表8、9に示す割合で混合した作動媒体を作製し、上記の方法で、(A)GWP、(B)相対サイクル性能(対R410A)、(C)相対圧力(RDPR410A)、(D)燃焼下限、(E)自己分解性を測定、算出、判定した。結果を表8、9に示す。
実施例27~34において、HFO-1132(E)と、HFO-1234yfおよびHFC-32の少なくとも1種と、を表10、11に示す割合で混合した作動媒体を作製し、上記の方法で、(A)GWP、(B)相対サイクル性能(対R410A)、(C)相対圧力(RDPR410A)、(D)燃焼下限、(E)自己分解性を測定、算出、判定した。結果を表10、11に示す。
比較例1~54において、HFOの少なくとも1種と、それ以外のHFO、HFC、炭化水素およびHCFOの少なくとも1種と、を表12~20に示す割合で混合した作動媒体を作製し、上記の方法で、(A)GWP、(B)相対サイクル性能(対R410A)、(C)相対圧力(RDPR410A)、(D)燃焼下限、(E)自己分解性を測定、算出、判定した。結果を表12~20に示す。
なお、
日本特許出願2014-017031号(2014年1月31日出願)、
日本特許出願2014-017967号(2014年1月31日出願)、
日本特許出願2014-030856号(2014年2月20日出願)、
日本特許出願2014-030857号(2014年2月20日出願)、
日本特許出願2014-033345号(2014年2月24日出願)、
日本特許出願2014-053765号(2014年3月17日出願)、
日本特許出願2014-055603号(2014年3月18日出願)、
日本特許出願2014-118163号(2014年6月6日出願)、
日本特許出願2014-118164号(2014年6月6日出願)、
日本特許出願2014-118165号(2014年6月6日出願)、
日本特許出願2014-118166号(2014年6月6日出願)、
日本特許出願2014-118167号(2014年6月6日出願)、
日本特許出願2014-127744号(2014年6月20日出願)、
日本特許出願2014-127745号(2014年6月20日出願)、
日本特許出願2014-148347号(2014年7月18日出願)、
日本特許出願2014-148348号(2014年7月18日出願)、
日本特許出願2014-148350号(2014年7月18日出願)、
日本特許出願2014-187002号(2014年9月12日出願)、
日本特許出願2014-187003号(2014年9月12日出願)、
日本特許出願2014-187004号(2014年9月12日出願)、
日本特許出願2014-187005号(2014年9月12日出願)、および、
日本特許出願2014-187006号(2014年9月12日出願)
の明細書、特許請求の範囲、要約書および図面の全内容をここに引用し、本発明の明細書の開示として、取り入れるものである。
Claims (10)
- 下記(A-1)~(E-1)の特性を備える熱サイクル用作動媒体。
(A-1)気候変動に関する政府間パネル(IPCC)第4次報告による地球温暖化係数(100年)が300未満である。
(B-1)下記式(X)で算出される相対冷凍能力(RQR410A)と下記式(Y)で算出される相対成績係数(RCOPR410A)の積が0.820以上である。
(式(X)および式(Y)中、R410Aは、ジフルオロメタンとペンタフルオロエタンの質量比1:1の混合物を示し、検体は相対評価されるべき作動媒体を示す。検体およびR410Aの冷凍能力は、検体およびR410Aを用いて、下記温度条件(T)で基準冷凍サイクルを運転した際の出力(kW)である。検体およびR410Aの成績係数は、検体およびR410Aの前記出力(kW)を、それぞれ前記運転に要した消費動力(kW)で除した値である。
[温度条件(T)]
蒸発温度が0℃(ただし、非共沸混合物の場合は、蒸発開始温度と蒸発完了温度の平均温度)、凝縮温度が40℃(ただし、非共沸混合物の場合は、凝縮開始温度と凝縮完了温度の平均温度)、過冷却度(SC)が5℃、および過熱度(SH)が5℃である。
(C-1)下記式(Z)で算出される相対圧力(RDPR410A)が1.100以下である。
(式(Z)中、R410Aは、R410Aは、ジフルオロメタンとペンタフルオロエタンの質量比1:1の混合物を示し、検体は相対評価されるべき作動媒体を示す。検体およびR410Aの圧縮機吐出ガス圧力は、検体およびR410Aを用いて、前記温度条件(T)で基準冷凍サイクルを運転した際の圧縮機吐出ガス圧力である。
(D-1)高圧ガス保安法におけるA法に準拠して測定される燃焼範囲の下限が5体積%以上である。
(E-1)高圧ガス保安法における燃焼範囲測定のためのA法に準拠する設備による0.98MPaG、250℃の条件下での燃焼試験において、圧力が2.00MPaGを超えることがない。 - 前記地球温暖化係数が250以下である、請求項1に記載の作動媒体。
- 前記地球温暖化係数が200以下である、請求項1に記載の作動媒体。
- 前記相対成績係数(RCOPR410A)と相対冷凍能力(RQR410A)の積が0.900以上である、請求項1~3のいずれか1項に記載の作動媒体。
- 前記相対成績係数(RCOPR410A)と相対冷凍能力(RQR410A)の積が0.950以上である、請求項4に記載の作動媒体。
- 前記相対圧力(RDPR410A)が1.000以下である、請求項1~5のいずれか1項に記載の作動媒体。
- 作動媒体が燃焼範囲を有しない、請求項1~6のいずれか一項に記載の作動媒体。
- 請求項1~7のいずれか1項に記載の熱サイクル用作動媒体と、冷凍機油とを含む、熱サイクルシステム用組成物。
- 請求項8に記載の熱サイクルシステム用組成物を用いた、熱サイクルシステム。
- 前記熱サイクルシステムが冷凍・冷蔵機器、空調機器、発電システム、熱輸送装置または二次冷却機である、請求項9に記載の熱サイクルシステム。
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Cited By (51)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP7173253B2 (ja) | 2022-11-16 |
| JP2024014939A (ja) | 2024-02-01 |
| US10787597B2 (en) | 2020-09-29 |
| EP3792330B1 (en) | 2024-04-24 |
| JP7323036B2 (ja) | 2023-08-08 |
| JP6950765B2 (ja) | 2021-10-13 |
| EP3792330A1 (en) | 2021-03-17 |
| JP2023001167A (ja) | 2023-01-04 |
| JPWO2015115252A1 (ja) | 2017-03-23 |
| CN106029821A (zh) | 2016-10-12 |
| JP2022000523A (ja) | 2022-01-04 |
| EP3101082A4 (en) | 2018-02-21 |
| US10131827B2 (en) | 2018-11-20 |
| EP3101082B1 (en) | 2020-12-02 |
| JP2025039692A (ja) | 2025-03-21 |
| JP2023138524A (ja) | 2023-10-02 |
| JP2020076108A (ja) | 2020-05-21 |
| JP7435893B2 (ja) | 2024-02-21 |
| JP2024040238A (ja) | 2024-03-25 |
| EP4417667A1 (en) | 2024-08-21 |
| EP3101082A1 (en) | 2016-12-07 |
| US20190031934A1 (en) | 2019-01-31 |
| CN106029821B (zh) | 2020-06-02 |
| US20160333243A1 (en) | 2016-11-17 |
| JP6657957B2 (ja) | 2020-03-04 |
| JP7396528B2 (ja) | 2023-12-12 |
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