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NL2034233B1 - A greenhouse for cultivating plants and a method for climate control in the greenhouse - Google Patents

A greenhouse for cultivating plants and a method for climate control in the greenhouse Download PDF

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Publication number
NL2034233B1
NL2034233B1 NL2034233A NL2034233A NL2034233B1 NL 2034233 B1 NL2034233 B1 NL 2034233B1 NL 2034233 A NL2034233 A NL 2034233A NL 2034233 A NL2034233 A NL 2034233A NL 2034233 B1 NL2034233 B1 NL 2034233B1
Authority
NL
Netherlands
Prior art keywords
detection unit
temperature
inlet
temperature detected
air
Prior art date
Application number
NL2034233A
Other languages
Dutch (nl)
Inventor
Johannes Voermans Joseph
Hubertus Emanuel Maria Malschaert Petrus
Original Assignee
Maurice Kassenbouw B V
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Maurice Kassenbouw B V filed Critical Maurice Kassenbouw B V
Priority to NL2034233A priority Critical patent/NL2034233B1/en
Priority to PCT/NL2024/050048 priority patent/WO2024181861A1/en
Application granted granted Critical
Publication of NL2034233B1 publication Critical patent/NL2034233B1/en

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Classifications

    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
    • A01G9/00—Cultivation in receptacles, forcing-frames or greenhouses; Edging for beds, lawn or the like
    • A01G9/24—Devices or systems for heating, ventilating, regulating temperature, illuminating, or watering, in greenhouses, forcing-frames, or the like
    • A01G9/246—Air-conditioning systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F12/00—Use of energy recovery systems in air conditioning, ventilation or screening
    • F24F12/001—Use of energy recovery systems in air conditioning, ventilation or screening with heat-exchange between supplied and exhausted air
    • F24F12/006—Use of energy recovery systems in air conditioning, ventilation or screening with heat-exchange between supplied and exhausted air using an air-to-air heat exchanger
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00—Control inputs relating to air properties
    • F24F2110/10—Temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00—Control inputs relating to air properties
    • F24F2110/10—Temperature
    • F24F2110/12—Temperature of the outside air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2203/00—Devices or apparatus used for air treatment
    • F24F2203/02—System or Device comprising a heat pump as a subsystem, e.g. combined with humidification/dehumidification, heating, natural energy or with hybrid system
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
    • Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
    • Y02A40/25—Greenhouse technology, e.g. cooling systems therefor

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Environmental Sciences (AREA)
  • Greenhouses (AREA)

Abstract

A greenhouse for cultivating plants in an interior space thereof, comprising: - an air ventilation system provided with an inlet channel for providing air into the interior space and an outlet channel for exhausting air from the interior space; - a first heat exchanger arranged for exchanging heat, in use, between the inlet channel and the outlet channel; and - a heat pump system arranged for providing and/or extracting heat at a first position in the inlet channel between an inlet of the inlet channel and the first heat exchangen - a control unit, communicatively coupled to the heat pump system, arranged for controlling the heat pump system. A method for climate control in a greenhouse.

Description

Title: A greenhouse for cultivating plants and a method for climate control in the greenhouse
Description:
According to a first aspect, the present disclosure relates to a greenhouse for cultivating plants in an interior space thereof, comprising: - an air ventilation system provided with an inlet channel for providing air into the interior space and an outlet channel for exhausting air from the interior space; - a first heat exchanger arranged for exchanging heat, in use, between the inlet channel and the outlet channel.
According to a second aspect, the present disclosure relates to a method for climate control in the greenhouse according to any one of the preceding claims, the method comprising the steps of: - providing, by the air ventilation system, air into the interior space; - exhausting, by the air ventilation system, air from the interior space; - exchanging heat, by the first heat exchanger, between the inlet channel and the outlet channel.
A drawback of a known greenhouse and method is that a relative large amount of energy is required for maintaining a predetermined relative humidity and temperature in the interior space while providing the interior space with fresh air.
The objective of the present disclosure is to provide a greenhouse and a method that allow to maintain a predetermined relative humidity and temperature in the interior space while providing the interior space with fresh air using a relative low amount of energy.
The objective is achieved by the greenhouse according to the first aspect of the present disclosure by providing the greenhouse with:
- a heat pump system arranged for providing and/or extracting heat at a first position in the inlet channel between an inlet of the inlet channel and the first heat exchanger, - a control unit, communicatively coupled to the heat pump system, arranged for controlling the heat pump system.
The present disclosure relies at least partly on the insight that is relatively attractive to remove moisture from air through condensation at a relative low temperature as compared to removing moisture from air having a relative high temperature.
In addition, it is known to be beneficial for reasons of energy efficiency to provide a heat exchanger for exchanging heat between air exhausted from the interior space and fresh air that is to be provided into the interior space of the greenhouse.
A known greenhouse draws in air from outside the greenhouse having the actual ambient temperature. In particular when the temperature difference between the ambient temperature and the air exhausted from the interior space is relatively small, the efficiency of the heat exchange cycle as well as removal of moisture, dehumidification, is relatively low or even ineffective.
The present disclosure, further relies at least partly on the insight that at relative low ambient temperature, for instance below the freezing point of water, the moisture in the air may solidify in the heat exchanger and thereby reducing or even blocking the flow of air in the inlet channel.
By providing the heat pump system and the control unit, the temperature of the air provided to the first heat exchanger, via the inlet channel, may be controlled thereby avoiding, or at least reducing the risk, of at least one of the identified issues with the known greenhouse.
Preferably, the an air ventilation system provided with an inlet channel for providing air from outside the greenhouse into the interior space and an outlet channel for exhausting air from the greenhouse originating from the interior space.
Preferably, the first heat exchanger is a counter-flow heat exchanger.
It is advantageous if the greenhouse further comprises a first detection unit arranged for detecting a temperature in the inlet channel at a second position in the inlet channel between the inlet of the inlet channel and the first position in the inlet channel. Providing the first detection unit at the second position in the inlet channel is beneficial for enabling to detect the temperature at that location before the air in the inlet channel passes the first heat exchanger.
In this regard, it is beneficial if the first detection unit is arranged for detecting the temperature of air in the inlet channel at the second position. Arranging the first detection unit for detecting the temperature of air in the inlet channel is beneficial for enabling a control of the heat pump system based on the air temperature itself thereby allowing a more rapid response to changes in the ambient air temperature.
In a practical embodiment of the greenhouse, the control unit is communicatively coupled to the first detection unit and arranged for controlling the heat pump system taking into account the temperature detected by the first detection unit. This is beneficial for allowing to maintain a predetermined relative humidity and temperature in the interior space while providing the interior space with fresh air from outside the greenhouse using a relative low amount of energy
In this regard, it is advantageous if the control unit is arranged for determining that the temperature detected by the first detection unit is below a first predetermined temperature and arranged for controlling the heat pump system for providing heat at the first position in the inlet channel upon determining that the temperature detected by the first detection unit is below the first predetermined temperature. Providing heat at the first position in the inlet channel may be beneficial for avoiding a temperature that is considered too low for an energy efficient operation of the greenhouse. In particular, when the first predetermined temperature corresponds to the freezing point of water, solidification of the moisture in the air drawn in the greenhouse, via the inlet channel, in the heat exchanger may be prevented, or at least significantly reduced.
Within the context of the present disclosure the wording “upon determining” is to be understood as “triggered by” to imply a coupled relation between the controlling of the control unit and the determining by the control unit.
It is advantageous, if the greenhouse further comprises a second detection unit arranged for measuring a temperature, preferably a temperature of air, in the outlet channel at a first position in the outlet channel between an inlet of the outlet channel and the first heat exchanger, wherein the control unit is further communicatively coupled to the second detection unit and arranged for controlling the heat pump system taking into account a difference between the temperature detected by the first detection unit and the temperature detected by the second detection unit.
Providing the second detection unit at the first position in the outlet channel is beneficial for enabling to detect the temperature at that location before the air in the outlet channel passes the first heat exchanger.
In this regard, it is beneficial if the second detection unit is arranged for detecting the temperature of air in the outlet channel at the first position in the outlet channel. Arranging the second detection unit for detecting the temperature of air in the outlet channel is beneficial for enabling a control of the heat pump system based on the air temperature itself thereby allowing a more rapid response to changes in the air temperature.
Preferably, the control unit is arranged for determining that the difference between the temperature detected by the first detection unit and the temperature detected by the second detection unit is smaller than a first predetermined temperature difference and arranged for controlling the heat pump system for extracting heat at the first position in the inlet channel upon determining that the difference between the temperature detected by the first detection unit and the temperature detected by the second detection unit is smaller than the first predetermined temperature difference.
This is beneficial for maintaining a temperature difference between the first position in the outlet channel and the second position in the inlet channel that is larger than the first predetermined temperature difference
In this regard, it is beneficial if the heat pump system comprises: - a compressor arranged for increasing a pressure of a refrigerant; - a heat-source-side heat exchanger configured to cause heat exchange between the refrigerant flowing therein and a first fluid passing therethrough; 5 - a utilization-side heat exchanger configured to cause heat exchange between refrigerant flowing therein and a second fluid passing therethrough; - a high-pressure refrigerant pipe connected to each of a discharge port of the compressor and the utilization-side heat exchanger; - a low-pressure refrigerant pipe connected to each of the heat-source-side heat exchanger and a suction port of the compressor; - a liquid refrigerant pipe connected to each of the heat-source-side heat exchanger and the utilization-side heat exchanger; - a pressure decreasing device arranged for decreasing the pressure of the refrigerant disposed in the liquid refrigerant pipe; wherein the greenhouse further comprises: - a receiving system connected for fluid flow with the utilization-side heat exchanger for receiving the first fluid from the heat pump system.
Providing the heat pump system with the receiving system is beneficial for maintain a predetermined relative humidity and temperature in the interior space while providing the interior space with fresh air from outside the greenhouse using a relative low amount of energy by utilizing the heat produced by the heat pump system in a receiving system.
In an embodiment, the receiving system may for instance comprise a water circulation system arranged for circulating water at temperatures elevated above the temperature of the air in the interior space.
In a practical embodiment of the greenhouse according to the first aspect of the present disclosure, the greenhouse comprises: - a return channel coupled for fluid flow with the outlet channel at a second position between an outlet of the outlet channel and the first heat exchanger and with the inlet channel at a third position between the inlet of the inlet channel and the second position in the inlet channel, - a third detection unit arranged for measuring a temperature, preferably a temperature of air, in the outlet channel at a third position in the outlet channel between the second position in the outlet channel and the first heat exchanger; - a fourth detection unit arranged for measuring a temperature, preferably a temperature of air, in the inlet channel at a fourth position in the inlet channel between the inlet of the inlet channel and the third position in the inlet channel; - a first valve arrangement arranged for allowing fluid flow, via the return channel, in a first state of the first valve arrangement, from the outlet channel to the inlet channel and blocking fluid flow, via the return channel, in the second state of the first valve arrangement, from the outlet channel to the inlet channel; wherein the control unit is further communicatively coupled to the third detection unit, the fourth detection unit and the first valve arrangement and arranged for determining that the temperature detected by the third detection unit is higher than the temperature detected by the fourth detection unit and that the temperature detected by the fourth detection unit is below a second predetermined temperature and arranged for bringing the first valve arrangement in the first state upon determining that the temperature detected by the third detection unit is higher than the temperature detected by the fourth detection unit and that the temperature detected by the fourth detection unit is below the second predetermined temperature.
In an advantageous embodiment, the greenhouse is provided with a cultivation gutter for cultivating plants thereon, wherein the air outlet of the inlet channel is provided near the cultivation gutter.
In an embodiment of the greenhouse, the greenhouse comprises an air pipe connected for fluid flow with the inlet channel, wherein the air pipe extends near a floor surface of the greenhouse. Usually the plants are cultivated in a lower part of the interior, so that supplying air to the lower part of the interior will be beneficial to the plants to be cultivated.
In one embodiment of the greenhouse, the greenhouse is provided with a plurality of parallel cultivation gutters for cultivating the plants and a plurality of the air pipes, each arranged beneath and parallel to a respective one of the plurality of cultivation gutters. This is advantageous for supplying air to a lower part of the interior in a relatively uniform manner over said lower part.
Preferably, the greenhouse comprises a first pressure device arranged for forcing air through the inlet channel.
Preferably, the greenhouse comprises a second pressure device arranged for forcing air through the outlet channel.
According to the second aspect, the present disclosure relates to a method for climate control in the greenhouse according to the first aspect of the present disclosure comprising the steps of: - providing, by the air ventilation system, air into the interior space; - exhausting, by the air ventilation system, air from the interior space; - exchanging heat, by the first heat exchanger, between the inlet channel and the outlet channel; - providing or extracting heat, by the heat pump system, at the first position in the inlet channel; and - controlling, by the control unit, the heat pump system.
Embodiments of the greenhouse according to the first aspect of the present disclosure as presented previously are also applicable to the method according to the second aspect of the present disclosure, and vice versa.
Effects of the greenhouse according to the first aspect of the present disclosure as presented above correspond to or are similar to effects of the method according to the second aspect of the present disclosure.
In an embodiment, during the step of providing, by the air ventilation system, air from outside the greenhouse is provided into the interior space.
In an embodiment, during the step of exhausting, by the air ventilation system, air originating from the interior space is exhausted from the greenhouse.
In an embodiment, the method comprises the step of determining, by the first detection unit, the temperature, preferably the temperature of air, in the inlet channel at the second position in the inlet channel between the inlet of the inlet channel and the first position in the inlet channel.
In this regard, it is beneficial if, during the step of controlling, the control unit controls the heat pump system taking into account the temperature detected by the first detection unit.
Preferably, the method further comprises the step of determining, by the control unit, that the temperature detected by the first detection unit is below a first predetermined temperature, wherein, during the step of controlling, the control unit controls the heat pump system for providing heat at the first position in the inlet channel.
It is advantageous if the method further comprises the step of detecting, by the second detection unit, the temperature, preferably the temperature of air, in the outlet channel at the first position in the outlet channel between the inlet of the outlet channel and the first heat exchanger, wherein, during the step of controlling, the control unit controls the heat pump system taking into account a difference between the temperature detected by the first detection unit and the temperature detected by the second detection unit.
In this regard, it is beneficial if the method comprises the step of determining, by the control unit, that the difference between the temperature detected by the first detection unit and the temperature detected by the second detection unit is smaller than the first predetermined temperature difference, wherein, during the step of controlling, the control unit controls the heat pump system for extracting heat at the first position in the inlet channel.
Preferably, the method further comprises the steps of: - detecting, by the third detection unit, the temperature, preferably the temperature of air, in the outlet channel at the second position in the outlet channel between the outlet of the outlet channel and the first heat exchanger; - determining, by the control unit, that the temperature detected by the third detection unit is higher than the temperature detected by the first detection unit and that the temperature detected by the first detection unit is below a second predetermined temperature; wherein the control unit controls the first valve arrangement for bringing the first valve arrangement in the first state.
The present disclosure will now be explained by means of a description of embodiments of a greenhouse for cultivating plants according to the present disclosure, in which reference is made to the following schematic figures, in which:
Fig. 1A: a top view of a greenhouse for cultivating plants according to the present disclosure is shown;
Fig. 1B: a side view of the greenhouse for cultivating plants according to the present disclosure is shown;
Fig. 2: a flowchart of the greenhouse for cultivating plants according to the present disclosure is shown;
Fig. 3: a flowchart of the heat pump system according to the present disclosure is shown;
Fig. 4: a flowchart of a method for climate control in a greenhouse according to the present disclosure is shown;
Fig. 5: a flowchart of another method for climate control in a greenhouse according to the present disclosure is shown;
Fig. 6: a flowchart of another greenhouse for cultivating plants according to the present disclosure is shown.
Fig. 1A shows a top view of a greenhouse 101 for cultivating plants 55 in an interior space 3 according to the present disclosure. The greenhouse 101 is provided with an air ventilation system 5 provided with an inlet channel 7 for providing air from outside the greenhouse 101 into the interior space 3 and an outlet channel 9 for exhausting air from the greenhouse 101 originating from the interior space 3. The inlet channel 7 has an inlet 14 and an outlet 22 and the outlet channel 9 has an inlet 20 and an outlet 48. The greenhouse 101 further comprises a first heat exchanger 11 arranged for exchanging heat, in use, between the inlet channel 7 and the outlet channel 9, a heat pump system 13 arranged for providing and/or extracting heat at a first position in the inlet channel 7 between the inlet 14 of the inlet channel 7 and the first heat exchanger11, and a control unit 15 that is communicatively coupled to the heat pump system 13 (indicated with a dotted line between the control unit 15 and the heat pump system 13), arranged for controlling the heat pump system 13.
A side view of the greenhouse 101 for cultivating plants 55 according to the present disclosure is shown in Fig. 1B. Air enters the interior space 3 via the inlet channel 7, having inlet 14 {not visible in this side view), and air flows via the air pipe 59 from the lower part to the higher part of the interior between the plants 55, as indicated by arrows, and then circulates in the interior space 3. (Part of) the air exits the interior space 3 via the inlet 20 of the outlet channel 9 and exits the greenhouse 1 via outlet 48 of the outlet channel 9.
The greenhouse 101 may be provided with a plurality of parallel cultivation gutters 57 for cultivating the plants 55 and a plurality of the air pipes 59, each arranged beneath and parallel to a respective one of the plurality of cultivation gutters 57.
Furthermore, the greenhouse 101 may comprise an air pipe 59 connected for fluid flow with the inlet channel 7, wherein the air pipe 59 extends near a floor surface 61 of the greenhouse 101.
The greenhouse 101 may comprise a first pressure device 63 arranged for forcing air through the inlet channel 7 and the greenhouse 101 may also comprise a second pressure device 65 arranged for forcing air through the outlet channel 9.
A flowchart of the greenhouse 101 according to the present disclosure is shown in Fig. 3. The greenhouse 101 comprises the air ventilation system 5 provided with the inlet channel 7 having an inlet 14. Air enters the inlet channel 7 and flows through the inlet channel 7 via the heat pump system 13 to the heat exchanger 11 before it enters the interior space 3 of the greenhouse 101.
The greenhouse 101 may further comprise a first detection unit 17. The first detection unit 17 is arranged for detecting a temperature, preferably a temperature of air, in the inlet channel 7 at a second position in the inlet channel 7 between the inlet 14 of the inlet channel 7 and the first position in the inlet channel 7. The first detection unit 17 is communicatively coupled with the control unit 15 (indicated with a dotted line between the first detection unit 17 and the control unit 15).
The greenhouse 101 may further comprise a second detection unit 19. The second detection unit 19 is arranged for measuring a temperature, preferably a temperature of air, in the outlet channel 9 at a first position in the outlet channel 9 between an inlet 20 of the outlet channel 9 and the first heat exchanger 11. The second detection unit 19 is communicatively coupled with the control unit 15 (indicated with a dotted line between the second detection unit 19 and the control unit 15).
The greenhouse 101 may further comprise a return channel 47 coupled for fluid flow with the outlet channel 9 at a second position between the outlet 48 of the outlet channel 9 and the first heat exchanger 11 and with the inlet channel 7 at a third position between the inlet 14 of the inlet channel 7 and the first detection unit 17 positioned at the second position in the inlet channel 7. A first valve arrangement 53 may be positioned in the return channel 47 and is arranged for allowing fluid flow, via the return channel 47, in a first state of the first valve arrangement 53, from the outlet channel 9 to the inlet channel 7 and blocking fluid flow, via the return channel 47, in the second state of the first valve arrangement 53, from the outlet channel 9 to the inlet channel 7. The first valve arrangement 53 is communicatively coupled with the control unit 15 (indicated with a dotted line between the first valve arrangement 53 and the control unit 15).
Furthermore, the greenhouse 101 may comprise a third detection unit 49 and a fourth detection unit 51. The third detection unit 49 is arranged for measuring a temperature, preferably a temperature of air, in the outlet channel 9 at a third position in the outlet channel 9 between the second position of the outlet channel 9 and the first heat exchanger 11. The fourth detection unit 51 is arranged for measuring a temperature, preferably a temperature of air, in the inlet channel 7 at a fourth position in the inlet channel 7 between the inlet 14 of the inlet channel 7 and the third position in the inlet channel 7. Both the third detection unit 49 and the fourth detection unit 51 are communicatively coupled with the control unit 15 (indicated with dotted lines between the third detection unit 49 and the control unit 15 and between the fourth detection unit 51 and the control unit 15, respectively).
Fig. 3 shows a flowchart of the heat pump system 13 according to the present disclosure. The heat pump system 13 comprises a compressor 21 arranged for increasing a pressure of a refrigerant, a heat-source-side heat exchanger 25 configured to cause heat exchange between the refrigerant flowing therein and a first fluid 27 passing therethrough, and a utilization-side heat exchanger 29 configured to cause heat exchange between refrigerant flowing therein and a second fluid 31 passing therethrough.
The heat pump system 13 also comprises a high-pressure refrigerant pipe 33 connected to each of a discharge port 35 of the compressor 21 and the utilization-side heat exchanger 29, a low-pressure refrigerant pipe 37 connected to each of the heat- source-side heat exchanger 25 and a suction port 39 of the compressor 21, and a liquid refrigerant pipe 41 connected to each of the heat-source-side heat exchanger and the utilization-side heat exchanger 29. 25
Furthermore, the heat pump system 13 comprises a pressure decreasing device 43 arranged for decreasing the pressure of the refrigerant disposed in the liquid refrigerant pipe 41, and a receiving system 45 connected for fluid flow with the utilization-side heat exchanger 29 for receiving the first fluid 31 from the heat pump system 13.
Fig. 4 and Fig. 5 each show a flow diagram of respective methods 201,202 for climate control in the greenhouse 101 according to the present disclosure. Methods
201,202 comprise the step of providing 203, by the air ventilation system 5, from outside the greenhouse 101, into the interior space 3. The step of exhausting 205, by the air ventilation system 5, air from the greenhouse 101 originating from the interior space 3, the step of exchanging heat 207, by the first heat exchanger 11, between the inlet channel 7 and the outlet channel 9, the step of providing or extracting heat 209, by the heat pump system 13, at the first position in the inlet channel 7, and the step of controlling 211, by the control unit 15, the heat pump system 13.
Both methods 201,202 further comprise the step of determining 213, by the first detection unit 17, the temperature, preferably the temperature of air, in the inlet channel 7 at the second position in the inlet channel 7 between the inlet 14 of the inlet channel 7 and the first position in the inlet channel 7.
Method 201 further comprises the step of determining 215, by the control unit 15, that the temperature detected by the first detection unit 17 is below a first predetermined temperature, the step of detecting 217, by the second detection unit 19, the temperature, preferably the temperature of air, in the outlet channel 9 at the first position in the outlet channel 9 between the inlet 20 of the outlet channel 9 and the first heat exchanger 11, and the step of determining 219, by the control unit 15, that the difference between the temperature detected by the first detection unit 15 and the temperature detected by the second detection unit 19 is smaller than a first predetermined temperature difference.
Method 202 further comprises the step of detecting 221, by the third detection unit 49, the temperature, preferably the temperature of air, in the outlet channel 9 at the second position in the outlet channel 9 between the outlet 48 of the outlet channel 9 and the first heat exchanger 11, and the step of determining 223, by the control unit 15, that the temperature detected by the third detection unit 49 is higher than the temperature detected by the first detection unit 17 and that the temperature detected by the first detection unit 17 is below a second predetermined temperature.
The greenhouse 301 differs mainly from the greenhouse 101 in that the inlet 14 of the inlet channel 7 is directly connected for fluid flow with the outlet 48 of the outlet channel ©. This is beneficial for removing moisture from air originating from the interior space 3 in a relative energy efficient manner. Elements of greenhouse 301 that are identical or similar to elements of greenhouse 101 are provided with identical reference numerals. The first heat exchanger 11 is a counter-flow heat exchanger.
The ventilation system 5 comprises a housing 303 housing the utilization-side heat exchanger and/or the heat-source-side heat exchanger. The housing 303 is provided with a drain 305 for draining moisture from the ventilation system 5.
The greenhouse 301 may further be provided with elements of greenhouse 101 that are identified for greenhouse 101 but not identified in Fig. 6 for greenhouse 301, such as the detection units 17 and 19.

Claims (15)

CONCLUSIESCONCLUSIONS 1. Een warenhuis (101, 301) voor het verbouwen van planten (55) in een binnenruimte (3) daarvan, omvattende: - een luchtventilatiesysteem (5) voorzien van een inlaatkanaal (7) voor het toevoeren van lucht in de binnenruimte (3) en een uitlaatkanaal (9) voor het afvoeren van lucht uit de binnenruimte (3); - een eerste warmtewisselaar (11) ingericht voor het, in gebruik, uitwisselen van warmte tussen het inlaatkanaal (7) en het uitlaatkanaal (9); en - een warmtepompsysteem (13) ingericht voor het leveren en/of onttrekken van warmte op een eerste positie in het inlaatkanaal (7) tussen een inlaat (14) van het inlaatkanaal (7) en de eerste warmtewisselaar (11); - een besturingseenheid (15), communicatief gekoppeld met het warmtepompsysteem (13), ingericht voor het besturen van het warmtepompsysteem (13).1. A greenhouse (101, 301) for growing plants (55) in an interior space (3) thereof, comprising: - an air ventilation system (5) provided with an inlet duct (7) for supplying air into the interior space (3) and an exhaust duct (9) for removing air from the interior space (3); - a first heat exchanger (11) arranged, in use, to exchange heat between the inlet duct (7) and the exhaust duct (9); and - a heat pump system (13) arranged to supply and/or extract heat at a first position in the inlet duct (7) between an inlet (14) of the inlet duct (7) and the first heat exchanger (11); - a control unit (15), communicatively coupled to the heat pump system (13), arranged to control the heat pump system (13). 2. Het warenhuis (101, 301) volgens conclusie 1, waarbij het warenhuis verder omvat: - een eerste detectie-eenheid (17) ingericht voor het detecteren van een temperatuur, bij voorkeur een luchttemperatuur, in het inlaatkanaal (7) op een tweede positie in het inlaatkanaal (7) tussen de inlaat (14) van het inlaatkanaal (7) en de eerste positie in het inlaatkanaal (7).2. The warehouse (101, 301) according to claim 1, wherein the warehouse further comprises: - a first detection unit (17) arranged to detect a temperature, preferably an air temperature, in the inlet duct (7) at a second position in the inlet duct (7) between the inlet (14) of the inlet duct (7) and the first position in the inlet duct (7). 3. Het warenhuis (101, 301) volgens conclusie 2, waarbij de besturingseenheid (15) communicatief is gekoppeld met de eerste detectie-eenheid (17) en is ingericht voor het besturen van het warmtepompsysteem (13) rekening houdend met de temperatuur gedetecteerd door de eerste detectie-eenheid (17).The warehouse (101, 301) according to claim 2, wherein the control unit (15) is communicatively coupled to the first detection unit (17) and is arranged to control the heat pump system (13) taking into account the temperature detected by the first detection unit (17). 4. Het warenhuis (101, 301) volgens conclusie 3, waarbij de besturingseenheid (15) is ingericht voor het bepalen dat de temperatuur gedetecteerd door de eerste detectie- eenheid (17) onder een eerste vooraf bepaalde temperatuur ligt en is ingericht voor het besturen van het warmtepompsysteem (13) voor het leveren van warmte op de eerste positie in het inlaatkanaal (7) wanneer wordt bepaald dat de temperatuur gedetecteerd door de eerste detectie-eenheid (17) onder de eerste vooraf bepaalde temperatuur ligt.The warehouse (101, 301) of claim 3, wherein the control unit (15) is configured to determine that the temperature detected by the first detection unit (17) is below a first predetermined temperature and is configured to control the heat pump system (13) for supplying heat at the first position in the inlet duct (7) when it is determined that the temperature detected by the first detection unit (17) is below the first predetermined temperature. 5. Het warenhuis (101, 301) volgens conclusie 2, 3 of 4, waarbij het warenhuis (101, 301) verder omvat: - een tweede detectie-eenheid (19) ingericht voor het meten van een temperatuur, bij voorkeur een luchttemperatuur, in het uitlaatkanaal (9) op een eerste positie in het uitlaatkanaal (9) tussen een inlaat (20) van het uitlaatkanaal (9) en de eerste warmtewisselaar (11); waarbij de besturingseenheid (15) verder communicatief is gekoppeld met de tweede detectie-eenheid (19) en is ingericht voor het besturen van het warmtepompsysteem (13) rekening houdend met een verschil tussen de temperatuur gedetecteerd door de eerste detectie-eenheid (17) en de temperatuur gedetecteerd door de tweede detectie-eenheid (19).5. The greenhouse (101, 301) according to claim 2, 3 or 4, wherein the greenhouse (101, 301) further comprises: - a second detection unit (19) arranged to measure a temperature, preferably an air temperature, in the exhaust duct (9) at a first position in the exhaust duct (9) between an inlet (20) of the exhaust duct (9) and the first heat exchanger (11); wherein the control unit (15) is further communicatively coupled to the second detection unit (19) and is arranged to control the heat pump system (13) taking into account a difference between the temperature detected by the first detection unit (17) and the temperature detected by the second detection unit (19). 6. Het warenhuis (101, 301) volgens conclusie 5, waarbij de besturingseenheid (15) is ingericht voor het bepalen dat het verschil tussen de temperatuur gedetecteerd door de eerste detectie-eenheid (17) en de temperatuur gedetecteerd door de tweede detectie- eenheid (19) kleiner is dan een eerste vooraf bepaald temperatuurverschil en is ingericht voor het besturen van het warmtepompsysteem (13) voor het onttrekken van warmte op de eerste positie in het inlaatkanaal (7) wanneer wordt bepaald dat het verschil tussen de temperatuur gedetecteerd door de eerste detectie-eenheid (17) en de temperatuur gedetecteerd door de tweede detectie-eenheid (19) kleiner is dan het eerste vooraf bepaalde temperatuurverschil.The warehouse (101, 301) according to claim 5, wherein the control unit (15) is adapted to determine that the difference between the temperature detected by the first detection unit (17) and the temperature detected by the second detection unit (19) is less than a first predetermined temperature difference and is adapted to control the heat pump system (13) for extracting heat at the first position in the inlet duct (7) when it is determined that the difference between the temperature detected by the first detection unit (17) and the temperature detected by the second detection unit (19) is less than the first predetermined temperature difference. 7. Het warenhuis (101, 301) volgens conclusie 6, waarbij het warmtepompsysteem (13) omvat: - een compressor (21) ingericht voor het verhogen van een druk van een koelmiddel; - een warmtewisselaar aan de warmtebronzijde (25) geconfigureerd voor het veroorzaken van warmte-uitwisseling tussen daarin stromend koelmiddel en een eerste vloeistof (27) die daardoorheen gaat; - een warmtewisselaar aan de gebruikszijde (29) geconfigureerd voor het veroorzaken van warmte-uitwisseling tussen daarin stromend koelmiddel en een tweede vloeistof (31) die daardoorheen gaat;7. The warehouse (101, 301) of claim 6, wherein the heat pump system (13) comprises: - a compressor (21) configured to increase a pressure of a refrigerant; - a heat source side heat exchanger (25) configured to cause heat exchange between refrigerant flowing therein and a first fluid (27) passing therethrough; - a use side heat exchanger (29) configured to cause heat exchange between refrigerant flowing therein and a second fluid (31) passing therethrough; - een hogedrukkoelmiddelleiding (33) verbonden met zowel een afvoerpoort (35) van de compressor (21) als de warmtewisselaar aan de gebruikszijde (29); - een lagedrukkoelmiddelleiding (37) verbonden met zowel de warmtewisselaar aan de warmtebronzijde (25) als een aanzuigpoort (39) van de compressor (21); - een leiding voor vloeibaar koelmiddel (41) verbonden met zowel de warmtewisselaar aan de warmtebronzijde (25) als de warmtewisselaar aan de gebruikszijde (29); - een drukverlagingsinrichting (43) ingericht voor het verlagen van de druk van het koelmiddel dat zich in de leiding voor vloeibaar koelmiddel (41) bevindt; waarbij het warenhuis (101, 301) verder omvat: - een ontvangstsysteem (45) verbonden voor vloeistofstroom met de warmtewisselaar aan de gebruikszijde (29) voor het ontvangen van de eerste vloeistof (27) uit het warmtepompsysteem (13).- a high pressure refrigerant line (33) connected to both a discharge port (35) of the compressor (21) and the service side heat exchanger (29); - a low pressure refrigerant line (37) connected to both the heat source side heat exchanger (25) and a suction port (39) of the compressor (21); - a liquid refrigerant line (41) connected to both the heat source side heat exchanger (25) and the service side heat exchanger (29); - a pressure reducing device (43) configured to reduce the pressure of the refrigerant contained in the liquid refrigerant line (41); wherein the store (101, 301) further comprises: - a receiving system (45) connected for fluid flow to the service side heat exchanger (29) for receiving the first fluid (27) from the heat pump system (13). 8. Het warenhuis (101, 301) volgens conclusie 2 of een daarvan afhankelijke conclusie, waarbij het warenhuis (101, 301) verder omvat: - een retourkanaal (47) gekoppeld voor vloeistofstroom met het uitlaatkanaal (9) op een tweede positie tussen een uitlaat (48) van het uitlaatkanaal (9) en de eerste warmtewisselaar (11) en met het inlaatkanaal (7) op een derde positie tussen de inlaat van het inlaatkanaal (7) en de tweede positie in het inlaatkanaal (7); - een derde detectie-eenheid (49) ingericht voor het meten van een temperatuur, bij voorkeur een luchttemperatuur, in het uitlaatkanaal (2) op een derde positie in het uitlaatkanaal (9) tussen de tweede positie in het uitlaatkanaal (9) en de eerste warmtewisselaar (11); - een vierde detectie-eenheid (51) ingericht voor het meten van een temperatuur, bij voorkeur een luchttemperatuur, in het inlaatkanaal (7) op een vierde positie in het inlaatkanaal (7) tussen de inlaat (14) van het inlaatkanaal (7) en de derde positie in het inlaatkanaal (7); - een eerste kleparrangement (53) ingericht voor het toelaten van vloeistofstroom, via het retourkanaal (47), in een eerste toestand van het eerste kleparrangement (53}, vanuit het uitlaatkanaal (9) naar het inlaatkanaal (7) en het blokkeren van vloeistofstroom, via het retourkanaal (47), in de tweede toestand van het eerste kleparrangement (53), vanuit het uitlaatkanaal (9) naar het inlaatkanaal (7); waarbij de besturingseenheid (15) verder communicatief is gekoppeld met de derde detectie-eenheid (49), de vierde detectie-eenheid (51) en het eerste kleparrangement (53) en is ingericht voor het bepalen dat de temperatuur gedetecteerd door de derde detectie-eenheid (40) hoger is dan de temperatuur gedetecteerd door de vierde detectie-eenheid (51) en dat de temperatuur gedetecteerd door de vierde detectie- eenheid (51) onder een tweede vooraf bepaalde temperatuur ligt en is ingericht om het eerste kleparrangement (53) in de eerste toestand te brengen wanneer wordt bepaald dat de temperatuur gedetecteerd door de derde detectie-eenheid (49) hoger is dan de temperatuur gedetecteerd door de vierde detectie-eenheid (51) en dat de temperatuur gedetecteerd door de vierde detectie-eenheid (51) onder de tweede vooraf bepaalde temperatuur ligt.8. The warehouse (101, 301) according to claim 2 or any claim dependent thereon, wherein the warehouse (101, 301) further comprises: - a return duct (47) coupled for fluid flow to the outlet duct (9) at a second position between an outlet (48) of the outlet duct (9) and the first heat exchanger (11) and to the inlet duct (7) at a third position between the inlet of the inlet duct (7) and the second position in the inlet duct (7); - a third detection unit (49) arranged to measure a temperature, preferably an air temperature, in the outlet duct (2) at a third position in the outlet duct (9) between the second position in the outlet duct (9) and the first heat exchanger (11); - a fourth detection unit (51) arranged to measure a temperature, preferably an air temperature, in the inlet duct (7) at a fourth position in the inlet duct (7) between the inlet (14) of the inlet duct (7) and the third position in the inlet duct (7); - a first valve arrangement (53) adapted to allow fluid flow, via the return channel (47), in a first state of the first valve arrangement (53), from the outlet channel (9) to the inlet channel (7) and to block fluid flow, via the return channel (47), in the second state of the first valve arrangement (53), from the outlet channel (9) to the inlet channel (7); wherein the control unit (15) is further communicatively coupled to the third detection unit (49), the fourth detection unit (51) and the first valve arrangement (53) and is adapted to determine that the temperature detected by the third detection unit (40) is higher than the temperature detected by the fourth detection unit (51) and that the temperature detected by the fourth detection unit (51) is below a second predetermined temperature and is adapted to bring the first valve arrangement (53) into the first state when it is determined that the temperature detected by the third detection unit (49) is higher than the temperature detected by the fourth detection unit (51) and that the temperature detected by the fourth detection unit (51) is below the second predetermined temperature. 9. Een werkwijze (201, 202) voor klimaatbesturing in het warenhuis (101, 301) volgens een van de voorgaande conclusies, waarbij de werkwijze (201, 202) de stappen omvat van: - het toevoeren (203), door het luchtventilatiesysteem (5), van lucht in de binnenruimte (3); - het afvoeren (205), door het luchtventilatiesysteem (5), van lucht uit de binnenruimte (3); - het uitwisselen van warmte (207), door de eerste warmtewisselaar (11), tussen het inlaatkanaal (7) en het uitlaatkanaal (9); - het leveren of onttrekken van warmte (209), door het warmtepompsysteem (13), op de eerste positie in het inlaatkanaal (7); en - het besturen (211), door de besturingseenheid (15), van het warmtepompsysteem (13).9. A method (201, 202) for climate control in the warehouse (101, 301) according to any one of the preceding claims, wherein the method (201, 202) comprises the steps of: - supplying (203), through the air ventilation system (5), air into the interior space (3); - extracting (205), through the air ventilation system (5), air from the interior space (3); - exchanging heat (207), through the first heat exchanger (11), between the inlet duct (7) and the outlet duct (9); - supplying or extracting heat (209), through the heat pump system (13), at the first position in the inlet duct (7); and - controlling (211), by the control unit (15), the heat pump system (13). 10. De werkwijze (201, 202) volgens conclusie 9 met gebruik van het warenhuis (101, 301) volgens conclusie 2, waarbij de werkwijze (201, 202) de stap omvat van: - het bepalen (213), door de eerste detectie-eenheid (17), van de temperatuur, bij voorkeur de luchttemperatuur, in het inlaatkanaal (7) op de tweede positie in het inlaatkanaal (7) tussen de inlaat (14) van het inlaatkanaal (7) en de eerste positie in het inlaatkanaal (7).10. The method (201, 202) according to claim 9 using the warehouse (101, 301) according to claim 2, wherein the method (201, 202) comprises the step of: - determining (213), by the first detection unit (17), the temperature, preferably the air temperature, in the inlet duct (7) at the second position in the inlet duct (7) between the inlet (14) of the inlet duct (7) and the first position in the inlet duct (7). 11. De werkwijze (201, 202) volgens conclusie 10 met gebruik van het warenhuis (101, 301) volgens conclusie 3, waarbij, tijdens de stap van het besturen, de besturingseenheid (15) het warmtepompsysteem (13) bestuurt rekening houdend met de temperatuur gedetecteerd door de eerste detectie-eenheid (17).The method (201, 202) of claim 10 using the warehouse (101, 301) of claim 3, wherein, during the step of controlling, the control unit (15) controls the heat pump system (13) taking into account the temperature detected by the first detection unit (17). 12. De werkwijze (201, 202} volgens conclusie 11 met gebruik van het warenhuis (101, 301) volgens conclusie 4, waarbij de werkwijze (201, 202) verder de stap omvat van: - het bepalen (215), door de besturingseenheid (15), dat de temperatuur gedetecteerd door de eerste detectie-eenheid (17) onder een eerste vooraf bepaalde temperatuur ligt; waarbij, tijdens de stap van het besturen, de besturingseenheid (15) het warmtepompsysteem (13) bestuurt voor het leveren van warmte op de eerste positie in het inlaatkanaal (7).12. The method (201, 202) of claim 11 using the store (101, 301) of claim 4, the method (201, 202) further comprising the step of: - determining (215), by the control unit (15), that the temperature detected by the first detection unit (17) is below a first predetermined temperature; wherein, during the controlling step, the control unit (15) controls the heat pump system (13) to supply heat at the first position in the inlet duct (7). 13. De werkwijze (201, 202) volgens een van de conclusies 10, 11 en 12, waarbij de werkwijze (201, 202) verder de stap omvat van: - het detecteren (217), door de tweede detectie-eenheid (19), van de temperatuur, bij voorkeur de luchttemperatuur, in het uitlaatkanaal (9) op de eerste positie in het uitlaatkanaal (9) tussen de inlaat (20) van het uitlaatkanaal (9) en de eerste warmtewisselaar (11); en waarbij, tijdens de stap van het besturen, de besturingseenheid (15) het warmtepompsysteem (13) bestuurt rekening houdend met een verschil tussen de temperatuur gedetecteerd door de eerste detectie-eenheid (17) en de temperatuur gedetecteerd door de tweede detectie-eenheid (19).13. The method (201, 202) according to any of claims 10, 11 and 12, wherein the method (201, 202) further comprises the step of: - detecting (217), by the second detection unit (19), the temperature, preferably the air temperature, in the exhaust duct (9) at the first position in the exhaust duct (9) between the inlet (20) of the exhaust duct (9) and the first heat exchanger (11); and wherein, during the step of controlling, the control unit (15) controls the heat pump system (13) taking into account a difference between the temperature detected by the first detection unit (17) and the temperature detected by the second detection unit (19). 14. De werkwijze (201, 202) volgens conclusie 13, met gebruik van het warenhuis (101, 301) volgens conclusie 6, waarbij de werkwijze (201, 202) de stap omvat van: - het bepalen (219), door de besturingseenheid (15), dat het verschil tussen de temperatuur gedetecteerd door de eerste detectie-eenheid (17) en de temperatuur gedetecteerd door de tweede detectie-eenheid (19) kleiner is dan het eerste vooraf bepaald temperatuurverschil; waarbij, tijdens de stap van het besturen, de besturingseenheid (15) het warmtepompsysteem (13) bestuurt voor het onttrekken van warmte op de eerste positie in het inlaatkanaal (7).14. The method (201, 202) of claim 13, using the warehouse (101, 301) of claim 6, wherein the method (201, 202) comprises the step of: - determining (219), by the control unit (15), that the difference between the temperature detected by the first detection unit (17) and the temperature detected by the second detection unit (19) is less than the first predetermined temperature difference; wherein, during the controlling step, the control unit (15) controls the heat pump system (13) to extract heat at the first position in the inlet duct (7). 15. De werkwijze (201, 202) volgens conclusie 10, met gebruik van het warenhuis volgens conclusie 8, waarbij de werkwijze (201, 202) verder de stappen omvat van: - het detecteren (221), door de derde detectie-eenheid (49), van de temperatuur, bij voorkeur de luchttemperatuur, in het uitlaatkanaal (9) op de tweede positie in het uitlaatkanaal (9) tussen de uitlaat {48) van het uitlaatkanaal (9) en de eerste warmtewisselaar (11); - het bepalen (223), door de besturingseenheid (15), dat de temperatuur gedetecteerd door de derde detectie-eenheid (49) hoger is dan de temperatuur gedetecteerd door de eerste detectie-eenheid (17) en dat de temperatuur gedetecteerd door de eerste detectie-eenheid (17) onder een tweede vooraf bepaalde temperatuur ligt; waarbij de besturingseenheid (15) het eerste kleparrangement (53) bestuurt voor het in de eerste toestand brengen van het eerste kleparrangement (53).15. The method (201, 202) of claim 10, using the warehouse of claim 8, the method (201, 202) further comprising the steps of: - detecting (221), by the third detection unit (49), the temperature, preferably the air temperature, in the exhaust duct (9) at the second position in the exhaust duct (9) between the outlet {48) of the exhaust duct (9) and the first heat exchanger (11); - determining (223), by the control unit (15), that the temperature detected by the third detection unit (49) is higher than the temperature detected by the first detection unit (17) and that the temperature detected by the first detection unit (17) is below a second predetermined temperature; wherein the control unit (15) controls the first valve arrangement (53) to bring the first valve arrangement (53) into the first state.
NL2034233A 2023-02-28 2023-02-28 A greenhouse for cultivating plants and a method for climate control in the greenhouse NL2034233B1 (en)

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Citations (3)

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US5392611A (en) * 1984-04-16 1995-02-28 Geophysical Engineering Company Method of and apparatus for reducing the heat load on a greenhouse
GB2528642A (en) * 2014-07-06 2016-02-03 Pierce Developments Holdings Ltd Apparatus
EP3745042A1 (en) * 2019-05-28 2020-12-02 C&M Holding B.V. Ventilation climate system and method for controlling a ventilation climate system

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Publication number Priority date Publication date Assignee Title
NL2003671C2 (en) * 2009-10-19 2011-04-20 Level Holding Bv CLIMATE MANAGEMENT DEVICE FOR CASES.

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5392611A (en) * 1984-04-16 1995-02-28 Geophysical Engineering Company Method of and apparatus for reducing the heat load on a greenhouse
GB2528642A (en) * 2014-07-06 2016-02-03 Pierce Developments Holdings Ltd Apparatus
EP3745042A1 (en) * 2019-05-28 2020-12-02 C&M Holding B.V. Ventilation climate system and method for controlling a ventilation climate system

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