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EP0452259B1 - Appareil pour produire l'eau chaude sanitaire et procédé pour la marche de l'appareil - Google Patents

Appareil pour produire l'eau chaude sanitaire et procédé pour la marche de l'appareil Download PDF

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Publication number
EP0452259B1
EP0452259B1 EP91810233A EP91810233A EP0452259B1 EP 0452259 B1 EP0452259 B1 EP 0452259B1 EP 91810233 A EP91810233 A EP 91810233A EP 91810233 A EP91810233 A EP 91810233A EP 0452259 B1 EP0452259 B1 EP 0452259B1
Authority
EP
European Patent Office
Prior art keywords
temperature
water
heat exchanger
hot water
usable
Prior art date
Legal status (The legal status 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 status listed.)
Expired - Lifetime
Application number
EP91810233A
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German (de)
English (en)
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EP0452259A3 (en
EP0452259A2 (fr
Inventor
Hans Gerhard
Andreas Fahrni
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Domotec AG
Original Assignee
Domotec AG
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 Domotec AG filed Critical Domotec AG
Priority to AT9191810233T priority Critical patent/ATE105626T1/de
Publication of EP0452259A2 publication Critical patent/EP0452259A2/fr
Publication of EP0452259A3 publication Critical patent/EP0452259A3/de
Application granted granted Critical
Publication of EP0452259B1 publication Critical patent/EP0452259B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D17/00—Domestic hot-water supply systems

Definitions

  • the invention relates to a method and a device for producing hot domestic water according to the preamble of claims 1 and 3 respectively.
  • a device and a method for producing hot domestic water is known.
  • thermal energy from an external heat circuit was supplied to a process water circuit. It has a heat exchanger, the outlet temperature of which is measured by a temperature measuring element, a flow switch, a bypass, a distributor and a circulating pump which is connected to the inlet of the heat exchanger.
  • the flow switch and the distributor are connected to a buffer tank for hot domestic water.
  • a service water volume determined by the volume of a circuit, consisting of flow switch, bypass, distributor, circulation pump, heat exchanger and again flow switch, brought to a predetermined temperature by repeated circulation in this closed circuit. This volume is then pushed into the buffer storage by switching the flow switch and replaced by a low-temperature hot water volume from the hot water storage, which is then heated again using the above procedure.
  • the domestic water is heated in a cyclical manner.
  • the object of the invention is to provide a method and a device for heating domestic water, in which a timed work is avoided and heating times of a heating system are obtained as long as possible.
  • claims 2 and 4 to 8 are preferred embodiments of the method and the device.
  • the device for producing hot domestic water shown in the single figure has a buffer storage 1 with a lower storage connection area for a cold water inlet 3 and an upper storage connection area for a hot water outlet 5.
  • the cold water inlet 3 and the hot water outlet 5 are connected to the cold water line 7 and the hot water consumption line 9, respectively e.g. B. connected to a house or hotel.
  • a feed line 11 leads from the lower part of the buffer store 1 to a heat exchanger 13 and a hot water outlet line 15 of the heat exchanger 13 opens into the upper part of the buffer store 1 (the hot water outlet line 15 of the heat exchanger 13 is the hot water inlet line of the buffer store 1).
  • the hot water outlet 5 is arranged at the highest point of the buffer store 1 and the connection of the hot water outlet line 15 as close as possible to the hot water outlet 5.
  • the feed line 11 is connected to the output line 15 via a bypass line 17.
  • a three-way valve 19 and between the three-way valve 19 and the connection of the supply line 11 - here designated llb - a pump 21 is arranged on the heat exchanger 13.
  • the three-way valve 19 acts as a shut-off device, with the hot water heated in the heat exchanger 13 the pump 21, depending on the direction of the three-way valve 19, is optionally conveyed in a circuit through the bypass line 17 or into the buffer store 1 or in partial flows through the bypass line 17 and into the buffer store 1, as described below.
  • a temperature measuring device 23 is arranged, which is connected to a control device 25 via an electrical signal line 24.
  • the electrical signal lines or electrical lines mentioned below are shown in dashed lines to distinguish them from the liquid lines.
  • One of the outputs of the control device 25 acts via an electrical line 27 on an actuator 29 which adjusts the three-way valve 19 as described below.
  • two further temperature measuring devices 31 and 32 which are arranged in the upper and in the lower half of the buffer store 1, are connected to the control device 25.
  • the temperature value measured by the temperature measuring device 31 is compared by the control device 25 with a lower temperature threshold value stored in it and, if the temperature falls below the same, a combustion system 34 with a boiler (not shown in more detail) is switched on as an installation for heating hot water as a heat-giving fluid via an electrical line 33.
  • the firing system 34 is connected to a flow and a return line 35 and 36 with the heat exchanger (heat exchanger) 13.
  • a pump 37 is arranged in the flow line 35 and is supplied via an electrical line 39 from the control device 25 is switched on or off.
  • the temperature of the hot water in the boiler is measured using a temperature measuring device 41 connected to the control device 25 via a signal line 40.
  • the pump 37 is switched on via the electrical line 39.
  • the delivery rate of the pump 37 is designed such that a turbulent flow results in the pipes of the heat exchanger 13. In a turbulent flow, optimal heat transfer from the pipe walls to the water flowing in the pipes is guaranteed; the tendency to calcify also decreases.
  • the temperature value measured by the temperature measuring device 32 is compared by the control device 25 with an upper threshold temperature stored in it, and if this is exceeded, the pump 37 is switched off via the electrical line 39 and the firing system 34 via the electrical line 33.
  • a differential pressure measuring device 42 which is connected to the supply line 11 and the output line 15 and which measures the differential pressure of the heat exchanger 13, is connected to the control device 25 via a signal line 43.
  • the flow rate is determined on the basis of the pressure difference of the service water (measured by the differential pressure measuring device 42) between the supply and the outlet lines 11 and 15. If the measured pressure difference exceeds a predetermined value stored in the control device 25, the control device 25 triggers an alarm in an alarm system 45 connected to it by means of an optical and / or acoustic warning signal. An increase in the pressure difference is due to calcification of the heat exchanger 13 possible.
  • the alarm represents a request to decalcify the heat exchanger 13.
  • a temperature measuring device 49 and 50 is arranged in the supply and return lines 35 and 36, and a hot water flow rate measuring device 51 is arranged in the return line 50.
  • the amount of heat absorbed by the heat exchanger 13 is determined from the two temperature values and the flow rate and transmitted to the control device 25 via a signal line 52.
  • the amount of heat absorbed can be queried periodically by the control device 25 by means of a modem (not shown).
  • the buffer store 1, the three-way valve 19, the pumps 21 and 37, the heat exchanger 13, the actuator 29, the temperature measuring devices 23, 31, 32, 49 and 50, the differential pressure measuring device 42, the hot water (boiler water) flow meter 51, the control device 25 , the alarm system 45, the bypass, supply and output lines 17, 11 and 15, the electrical lines 24, 27, 33, 39, 43 and 52 are integrated into a compact, self-contained, prefabricated component 53 which can be transported as a whole.
  • the prefabricated component 53 delimited in the single figure by a dash-dotted line, has a power connection 54 for the control device 25, the alarm system 45 and the two pumps 21 and 37, as well as the cold water inlet 3, the hot water outlet 5 and a schematically indicated connection 55a and 55b for the supply and return lines 35 and 36 and a connection 55c and 55d for the signal line 40 and the electrical line 33 for switching the firing system 34 containing the boiler on and off.
  • the description of the operation of the device begins with a state in which both the hot water and the hot water are cold.
  • the pump 21 is first switched on by the control device 25.
  • the control device 25 determines that the temperature measured with the temperature measuring device 23 is below the stored value of the hot water temperature, it closes with the actuator 29 the connection of the part 11a of the supply line 11 to the three-way valve 19, which is directly connected to the lower part of the buffer tank 1 is connected completely and connects the bypass line 17 to the part 11b of the supply line 11 which is connected to the heat exchanger 13.
  • the pump 21 thus pumps domestic water in a circuit which contains the bypass line 17 and the heat exchanger 13.
  • control device 25 determines that the temperature of the process water in the buffer store 1, measured with the temperature measuring device 31, falls below a lower threshold temperature, and therefore switches the firing system 34 on. As soon as the temperature of the hot water temperature in the boiler measured by the temperature measuring device 41 is greater than the hot water temperature value stored in the control device 25, the pump 37 is switched on via the line 39 by the control device 25 and thus hot water through the supply line 35 into the heat exchanger 13 and from conveyed this back to the boiler via the return line 36. In the heat exchanger 13, heat is now transferred from the hot water to the process water.
  • the control device 25 opens the branch of the three-way valve 19 to the line 11a and the branch to the bypass line 17 so far via the actuator 29. that the temperature measured with the temperature measuring device 23 corresponds to the tolerance in the control device 25 stored hot water temperature value.
  • the pump 21 now drives hot water through the heat exchanger 13, the bypass line 17 and into the buffer store 1.
  • the heated hot water collects in the upper part of the buffer store 1.
  • the heating of the process water continues until the process water temperature measured with the temperature measuring device 32 exceeds a value of the upper threshold temperature stored in the control device 25. If this value is exceeded, the control device 25 switches off both pumps 21 and 37 and the furnace in the furnace 34. By switching off the pump 21 it is avoided that heat is removed from the buffer storage 1 when the firing system 34 is switched off by the heat exchanger 13.
  • hot water is obtained via the hot water pipe 9, it is pressed by the pressure in the cold water pipe 7 from the buffer storage 1 into the hot water pipe 9 to the consumer. Since the buffer store 1 is filled with hot water at constant temperature up to the level of the temperature measuring device 32, the consumer always draws hot water of constant temperature since heat losses in the buffer tank 1 are negligible.
  • the heating process described above starts again as soon as the value of the hot water temperature at the temperature measuring device 31 has dropped to a temperature value below the lower threshold temperature value stored in the control device 25 due to the cold water flowing in. The remaining volume between the height of the temperature measuring device 31 and the hot water outlet 5 is large enough to prevent a delay in the heating phase Collect hot water heating.
  • the pump 21 and the three-way valve 19 can also be arranged in the hot water outlet line 15. It is only necessary to ensure that the pump 21 is connected to one of the process water connections of the heat exchanger 13 before any branching of the process water line - with the exception of the connections for the differential pressure measuring device 42. If the pump 21 is in the supply line 11, the pump outlet is and if it is in the hot water outlet line 15, its input is connected to the corresponding connection of the heat exchanger 13.
  • the three-way valve 19 can optionally be installed in the supply line 11 or in the hot water outlet line 15 and connected to one of the bypass line ends; a change in the control device 25 is not necessary.
  • a thermostatically controllable three-way valve which is not shown, can be used, which is arranged directly from a thermal sensor arranged at the same location as the temperature measuring device 23, which is no longer required is set.
  • thermostatic three-way valve 19 instead of the thermostatic three-way valve 19 described above, a thermostatic two-way valve can be used in line part 11a or in part of line 15 leading from bypass line 17 to accumulator 1.
  • a throttle element is installed in the bypass part 17 for the purpose of system adjustment.
  • the combustion system 34 can be a system with liquid or solid fuels, and an electrical heater can also be used.
  • the output line 15 can also be connected to the hot water outlet 5.
  • the supply line 11 can also be connected directly to the cold water line 7.
  • the device according to the invention for producing hot domestic water has the great advantage that hot domestic water is available for use almost immediately after the supply of heat in the heat exchanger 13, since due to the domestic water circulating completely or partially through the bypass line 17, only a small domestic water volume at the start of heating is heated. Another advantage is that the hot water temperature is constant, irrespective of the amount of hot water that has just been drawn, since the heated hot water is fed to the consumers directly at the outflow of the hot hot water already stored in the buffer tank 1.
  • the operating temperature of the boiler can advantageously be compared to the known hot water treatment plants for the same amount of hot water to be heated, resulting in smaller boiler radiation losses. Due to the lowerable temperature for heating the water, waste heat can also be used with a lower temperature level than the boiler temperature of conventional boilers.
  • the device according to the invention can be designed in such a way that the burner running time specified by the legislator can be achieved, thus ensuring environmentally friendly combustion and avoiding the so-called "clocking" of the burner.
  • the recirculation system on the domestic hot water side enables a broad performance range to be covered with only one type of heat exchanger, due to the varying domestic water temperatures when entering the heat exchanger 13.
  • a constant heat output is transmitted in the heat exchanger 13 as soon as the domestic water pump 21 and the hot water pump 37 convey it through it, since on the one hand the volume flows and the temperatures in the domestic and hot water branch are largely constant .
  • the temperature in the hot water branch is given by an almost constant supply of energy from the furnace in system 34.
  • the dhw temperature is kept essentially constant regardless of the cold water temperature with the three-way valve 19.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Domestic Plumbing Installations (AREA)
  • Domestic Hot-Water Supply Systems And Details Of Heating Systems (AREA)
  • Bidet-Like Cleaning Device And Other Flush Toilet Accessories (AREA)
  • Massaging Devices (AREA)
  • Details Of Fluid Heaters (AREA)

Claims (8)

  1. Procédé pour produire de l'eau sanitaire chaude pouvant être conservée dans un accumulateur tampon (1), par échauffement d'un courant d'eau sanitaire traversant un échangeur de chaleur (13) à vitesse d'écoulement constante, caractérisé en ce que
       la température de l'eau sanitaire est maintenue constante dans les limites d'une tolérance de régulation,
       un premier courant partiel d'eau sanitaire est dirigé à travers l'accumulateur tampon (1) et un second courant partiel d'eau sanitaire est dirigé dans une dérivation (17) qui court-circuite l'accumulateur tampon (1), sous forme de courants partiels du courant d'eau sanitaire, le rapport entre les débits étant régulé de façon continue en fonction de la déviation de la température réelle du courant d'eau sanitaire dans l'échangeur de chaleur par rapport à une valeur de consigne prédéterminée,
       de manière qu'une installation de chauffage (34) qui envoie de l'eau de chauffage à l'échangeur de chaleur (13) présente des durées de chauffage relativement longues en évitant un mode de fonctionnement à cadences de courte durée.
  2. Procédé selon la revendication 1, caractérisé en ce que la température réelle du courant d'eau sanitaire après avoir quitté l'échangeur de chaleur (13) est mesurée avant la dérivation commandée des courants partiels.
  3. Dispositif pour la mise en oeuvre du procédé selon la revendication 1 ou 2, comprenant une installation de chauffage (34) pour produire de l'eau de chauffage, un échangeur de chaleur (13) par lequel l'eau de chauffage chauffe un courant d'eau sanitaire, un accumulateur tampon (1) pour l'eau sanitaire chaude, une dérivation (17) court-circuitant l'accumulateur tampon (1), un élément de mesure de la température (23) pour déterminer la température réelle de l'eau sanitaire chauffée dans l'échangeur de chaleur (13), et un dispositif d'arrêt (19) au moyen duquel l'eau sanitaire chauffée peut être dirigée vers un accumulateur tampon (I) ou vers la dérivation (17) en fonction de la température de l'eau sanitaire mesurée par l'élément de mesure de la température (23),
       caractérisé en ce que,pour obtenir un rapport entre les débits continuellement variables d'un premier et d'un second courants partiels d'eau sanitaire, représentant des courants partiels du courant d'eau sanitaire, passant par l'accumulateur tampon (1) et la dérivation (17), le dispositif d'arrêt (19) peut être réglé au moyen d'un organe de commande (29) pouvant être excité par un dispositif de commande (25) en fonction de la température réelle mesurée par l'instrument de mesure de température (23) relié au dispositif de commande (25), de manière qu'à partir d'un mélange d'un premier courant froid sortant de l'accumulateur tampon (1) et d'un second courant allant au courant d'eau sanitaire après chauffage dans l'échangeur de chaleur (13) puisse être atteinte une température réelle qui n'est différente d'une température de consigne mise en mémoire dans l'unité de commande (23) qu'à une tolérance près.
  4. Dispositif selon la revendication 3, caractérisé en ce que le dispositif de commande (25) est relié à un second dispositif de mesure de température (31) à la partie supérieure et à un troisième dispositif de mesure de température (32) à la partie inférieure de l'accumulateur tampon (1), ainsi qu'à l'installation de chauffage (34), l'installation de chauffage (34) pouvant être commandée par le dispositif de commande (25) de manière que le chauffage de l'eau de chauffage s'effectue quand la température de l'eau sanitaire mesurée par le second dispositif de mesure de température (31) tombe au-dessous d'une température de seuil inférieure, et soit arrêté quand la température de l'eau sanitaire mesurée par le troisième dispositif de mesure de température (23) monte au-dessus d'une température de seuil supérieure.
  5. Dispositif selon la revendication 3 ou 4, caractérisé en ce que le dispositif d'arrêt (19) est constitué sous forme d'un distributeur à trois voies dont deux raccords sont reliés à une conduite d'amenée et à une conduite de sortie (11, 15) du dispositif de transfert de chaleur (13) et dont un troisième raccord est relié à une extrémité de la conduite de dérivation (17) dont l'autre extrémité débouche dans la conduite de sortie ou dans la conduite d'amenée (15, 11).
  6. Dispositif selon l'une quelconque des revendications 3 à 5, caractérisé en ce qu'un instrument de mesure de pression différentielle (42) qui est monté parallèlement au dispositif de transfert de chaleur (13) est relié au dispositif de régulation (25) qui déclenche un signal d'alarme (45) quand il y a passage au-dessus d'une baisse de pression prédéterminée dans le dispositif de transfert de chaleur (13).
  7. Dispositif selon l'une quelconque des revendications 3 à 6, caractérisé en ce que des quatrièmes dispositifs de mesure de température (49, 50) sont montés respectivement dans chacune des conduites d'amenée et de retour (35, 36) de l'installation de chauffage (34) qui sont reliées au dispositif de transfert de chaleur (13), et en ce que dans l'une des deux conduites (35, 36) est monté un instrument de mesure de débit d'eau de chauffage (51) pour déterminer la quantité de chaleur utilisée dans le dispositif de transfert de chaleur (13).
  8. Dispositif selon l'une quelconque des revendications 3 à 7,
       caractérisé par un élément préfabriqué compact constitué sous forme d'un ensemble complet, transportable dans son ensemble, comprenant l'accumulateur tampon (1), l'échangeur de chaleur (13), le premier dispositif de mesure de température (23), le dispositif d'arrêt (19), l'organe de commande (29) et le dispositif de régulation (25), ainsi qu'une première pompe (21) pour les courants partiels d'eau sanitaire, une seconde pompe (37) pour l'eau de chauffage, des raccords respectifs (55a, 55b) pour l'arrivée et le retour de l'eau de chauffage, une conduite d'amenée d'eau froide (7) et un raccord pour la conduite d'eau sanitaire chaude (9), une prise électrique (54) pour
       le dispositif de régulation (25), les dispositifs de mesure de température (23, 31, 32, 49, 50) et l'organe de commande (29), le dispositif de régulation (25), les dispositifs de mesure de température (23, 31, 32, 49, 50) ainsi que l'organe de commande (29) étant reliés électriquement et
       l'accumulateur tampon (1), l'échangeur de chaleur (13), les dispositifs de mesure de température (23, 31, 32, 49, 50), le dispositif d'arrêt (19), la première ainsi que la seconde pompes (21, 37), les raccords (55a, 55b) pour l'arrivée et le retour de l'eau de chauffage, la conduite d'amenée d'eau froide (7) ainsi que le raccord pour la conduite d'eau sanitaire chaude (9) étant reliés fonctionnellement pour le passage des fluides.
EP91810233A 1990-04-02 1991-03-28 Appareil pour produire l'eau chaude sanitaire et procédé pour la marche de l'appareil Expired - Lifetime EP0452259B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT9191810233T ATE105626T1 (de) 1990-04-02 1991-03-28 Vorrichtung zur erzeugung von warmem brauchwasser und verfahren zum betrieb der vorrichtung.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH1082/90 1990-04-02
CH108290 1990-04-02

Publications (3)

Publication Number Publication Date
EP0452259A2 EP0452259A2 (fr) 1991-10-16
EP0452259A3 EP0452259A3 (en) 1991-10-23
EP0452259B1 true EP0452259B1 (fr) 1994-05-11

Family

ID=4202039

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91810233A Expired - Lifetime EP0452259B1 (fr) 1990-04-02 1991-03-28 Appareil pour produire l'eau chaude sanitaire et procédé pour la marche de l'appareil

Country Status (3)

Country Link
EP (1) EP0452259B1 (fr)
AT (1) ATE105626T1 (fr)
DE (1) DE59101593D1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19624551C2 (de) * 1996-06-20 2002-02-28 Baelz Gmbh Helmut Verfahren und Vorrichtung zur Brauchwassererwärmung

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3238285A1 (de) * 1982-10-15 1984-04-19 Max 8491 Katzelsried Bindl Jun. System zum zufuehren von waermeenergie aus einem aeusseren waermekreislauf an einen brauchwasserkreislauf, insbesondere brauchwasserspeicher
DE8812836U1 (de) * 1988-10-13 1990-02-08 Viessmann Werke GmbH & Co, 3559 Allendorf Zusatzwärmetauscher
FR2647537B1 (fr) * 1989-05-29 1995-04-14 Chaffoteaux Et Maury Perfectionnements aux ballons d'eau chaude et aux installations equipees de tels ballons

Also Published As

Publication number Publication date
EP0452259A3 (en) 1991-10-23
EP0452259A2 (fr) 1991-10-16
DE59101593D1 (de) 1994-06-16
ATE105626T1 (de) 1994-05-15

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