EP3112767A1 - Installation de préparation d'eau chaude sanitaire - Google Patents

Installation de préparation d'eau chaude sanitaire Download PDF

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Publication number
EP3112767A1
EP3112767A1 EP16175086.4A EP16175086A EP3112767A1 EP 3112767 A1 EP3112767 A1 EP 3112767A1 EP 16175086 A EP16175086 A EP 16175086A EP 3112767 A1 EP3112767 A1 EP 3112767A1
Authority
EP
European Patent Office
Prior art keywords
circuit
boiler
line
water
sanitary water
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.)
Granted
Application number
EP16175086.4A
Other languages
German (de)
English (en)
Other versions
EP3112767B1 (fr
Inventor
Marc Trela
Paul Bouteiller
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP3112767A1 publication Critical patent/EP3112767A1/fr
Application granted granted Critical
Publication of EP3112767B1 publication Critical patent/EP3112767B1/fr
Active 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
    • F24D17/0026—Domestic hot-water supply systems with conventional heating means
    • F24D17/0031—Domestic hot-water supply systems with conventional heating means with accumulation of the heated water
    • 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
    • F24D17/02—Domestic hot-water supply systems using heat pumps
    • 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
    • F24D19/00—Details
    • F24D19/10—Arrangement or mounting of control or safety devices
    • F24D19/1006—Arrangement or mounting of control or safety devices for water heating systems
    • F24D19/1051—Arrangement or mounting of control or safety devices for water heating systems for domestic hot water
    • F24D19/1054—Arrangement or mounting of control or safety devices for water heating systems for domestic hot water the system uses a heat pump

Definitions

  • the subject of the present invention is a plant for the treatment of hot sanitary water.
  • the stratification in the tank for hot sanitary water is based on the variation of the density of the water as a function of its temperature.
  • the hot water is lighter than the cold water, so that the cold water stays under the hot water when the water is not circulated. In the case of extraction with a large throughput, the difference in density between the hot water and the cold water is insufficient to prevent the water from mixing.
  • the tank is designed to have its own stratification of the water layers. This stratification can be disturbed by the mixed water that arrives during the withdrawals.
  • the stability of the stratification depends mainly on the flow rate of cold water fed in, the height of the container in relation to its diameter and the effectiveness of the feed nozzle.
  • the object of the invention is to avoid the mixing of cold water and hot water and the disturbance of the stratification of the layers in the container for the treatment of hot sanitary water for a maximum efficiency of the available heating energy.
  • the invention has a plant for the treatment of hot sanitary water to the object, comprising: a main container for the removal hot sanitary water through an outlet of hot sanitary water at the high portion, a small volume auxiliary tank relative to the volume of the main tank with a cold water inlet at the deep portion, a connecting pipe leading into the top of the auxiliary tank and into the bottom of the main tank a main heat source having an exchanger installed in the lower portion of the main tank, a branch connecting the lower portion of the auxiliary tank to the upper portion of the main tank and equipped with an auxiliary heat source, a control system having a group of temperature sensors and a control circuit wherein the temperature sensors load the high portion, the deep portion of the main tank, and the deep portion of the auxiliary tank, the control circuit being connected to the main heat source and to the auxiliary heat source so as to be responsive to those of Sensors to activate supplied temperatures, which in turn depend on the removal of hot sanitary water.
  • the plant for the treatment of hot sanitary water according to the invention has the advantage that it uses a transcritical heat pump, in particular a CO2 heat pump, in a particularly effective manner for the treatment of hot sanitary water to maximize the heat energy both for the small withdrawals as well to use the large withdrawals.
  • the heat pump is a transcritical CO2 heat pump.
  • the large temperature variation of CO2 in heating the water benefits; the water is heated at once, which is advantageous for this high performance concept.
  • the circuit with the boiler at the branch comprises a central heating circuit connected to the supply line of the circuit and through a three-way valve to the line connected to the exchanger of the main tank, the central heating circuit branching from the pipe ,
  • the three-way valve is connected at the junction of the supply line of the boiler and the input of the central heating by a line with a three-way valve, whose output on the one hand to the heat exchanger of the main tank and on the other connected to the return line of the circuit in front of the boiler.
  • the circuit of the boiler at the junction between the feed line at the boiler outlet and the return line comprises the heating circuit whose output line is connected to the return line via a heat exchanger through a three-way valve in front of the boiler, this heat exchanger also being connected to the supply line the circuit branches off by a branch, wherein the output of the exchanger is connected by a line to the return line of the circuit by a three-way valve.
  • Fig. 1 There is a plant for the treatment of hot sanitary water from a main tank 1 and an auxiliary tank 2.
  • the main tank 1 has a large volume.
  • the hot sanitary water is at the high section 6 of the Container 1 removed.
  • the auxiliary tank 2 is a low-volume tank with respect to that of the main tank 1. It is connected to the cold water supply tank 4 at the deep portion 21.
  • the main tank 1 and the auxiliary tank 2 are connected by a connecting pipe 3, which discharges freely 31, 32 into the deep portion 11 of the main tank 1 and into the high portion 22 of the auxiliary tank 2.
  • the deep portion 21 of the auxiliary tank 2 is connected to the high portion 12 of the main tank 1 through a supply pipe 51 of a branching circuit 5.
  • the branch circuit 5 is equipped with a heat pump 6 having a circulation pump 61 connected to the tank 1 through a branch line recirculation line 52.
  • each of the tanks 1, 2 contains water having the lowest temperature and the high portion 12, 22 of highest temperature water of the respective container 1, 2.
  • the deep portion 11 of the main tank 1 is equipped with a heat exchanger 13 connected to a boiler 7 through a circuit 8 having a supply pipe 82 and a return pipe 81.
  • the circle 13, 8, 7 is equipped with a circulation pump 83.
  • the various points of the system are equipped with temperature sensors (T ') which supply a control unit 100 which controls the operation of the system.
  • the deep section 11 is equipped with a temperature sensor T11.
  • the high portion 22 of the auxiliary container 2 is provided with a temperature sensor T22.
  • the heat pump is provided with sensors T6a, T6b, as well as the boiler 7 at the input T7a and at the output T7b.
  • the temperature sensors are connected to the control unit 100 which receives the temperature signals STi and in response controls the function of the hot sanitary water conditioning system by control signals SCi.
  • the temperature in the various sections of the system (main tank 1 and auxiliary tank 2) depends on the extraction from hot sanitary water and from the throughput of the withdrawal or the volume of hot sanitary water withdrawn.
  • the control circuit 9 controls the function of the branch circuit 51 and that (8) of the boiler 7 feeding the exchanger 13 installed in the deep portion 11 of the main tank 1.
  • the control unit 100 does not intervene to activate the branch circuit 5 via the heat pump 6 ,
  • the cold water arriving in the auxiliary tank 2 greatly lowers its temperature.
  • This detected temperature (T22) is transmitted to the control unit 100, which responds by activating the branch circuit 5 through the circulation pump 61, which removes the water at the base 21 of the auxiliary tank 2 to reheat it by the heat pump 6 and heat the warmed water to feed the upper portion 12 of the main container 1.
  • the pump 61 of the branch circuit 5 functions parallel to the connection line 3.
  • the flow rate of the pump 61 is adjusted so that the outlet temperature of the hot water (T 6b ) is equal to the target temperature of the hot sanitary water. This throughput has no relation to the throughput of the withdrawal.
  • the supplement may be provided by the boiler 7 and the exchanger 13 located in the lower section 11 of the main container 1 is installed, delivered.
  • the heat pump 6 is in particular a transcritical CO2 heat pump. It directly heats the water from its network 4 arrival temperature to the set point temperature for the hot sanitary water.
  • the CO2 heat pump does its best to heat the water from the lowest temperature in the water network. The higher the temperature of the feed water, the lower the efficiency of this heat pump to reach the target temperature of the hot sanitary water.
  • the main tank 1 is designed to enhance the recovery of hot water by the heat pump 6 after taking small volumes of water (less than 15 liters).
  • the withdrawals of relatively small volumes are most common (hand washing, dish washing ...) and they are expressed by feeding small amounts of cold water into the container 2.
  • Fig. 2 shows a plant for the treatment of hot sanitary water according to claim 1, which is combined with a central heating CH, which is supplied with hot water at the outlet of the boiler 7.
  • the central heating CH is connected by a branch 821 of the supply line 82 of the circle 8 of the boiler and by a three-way valve 822 with the exchanger 13 through the line 823.
  • the main container 1 forms both the withdrawal reserve of the hot sanitary water and the heat tank for the circuit 8, when it feeds the central heating CH.
  • Fig. 3 shows another variant of the system with the central heating CH of Fig. 2 , It also includes a branch 825 in front of the exchanger 13 with a three-way valve 824 in the conduit 823 for branching off a fraction of the water of the central heating circuit directly at the entrance of the boiler 7 by short-circuiting the exchanger 13 and the main container 1.
  • Fig. 4 shows another variant of the combined plant for the treatment of hot sanitary water and the central heating CH with a heat exchanger 9, which is connected to a branch 91 of the feed line 52 of the branch circuit 5 via the heat pump 6, with a return 92 and a three-way valve 93 on the return line 51 of the branch circuit 5.
  • the control of the three-way valve 93 makes it possible to partially or completely open the branch 91 via the exchanger 9 or to separate this branch to distribute the flow of hot water (heating fluid) in the supply line 52 of the heat pump 6 or not ,
  • the exchanger 9 is also traversed by the return 826 of the heating circuit CH, which is connected to the return 81 of the circuit 8 in front of the boiler 7 (pump 83) through a three-way valve 827, the throughput of heating fluid (water) by one hand the heating circuit CH and on the other hand regulates the exchanger 13.

Landscapes

  • 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)
  • Steam Or Hot-Water Central Heating Systems (AREA)
  • Heat-Pump Type And Storage Water Heaters (AREA)
EP16175086.4A 2015-07-03 2016-06-17 Installation de preparation d'eau chaude sanitaire Active EP3112767B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1556316A FR3038367B1 (fr) 2015-07-03 2015-07-03 Installation de preparation d'eau chaude sanitaire

Publications (2)

Publication Number Publication Date
EP3112767A1 true EP3112767A1 (fr) 2017-01-04
EP3112767B1 EP3112767B1 (fr) 2022-12-21

Family

ID=53801104

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16175086.4A Active EP3112767B1 (fr) 2015-07-03 2016-06-17 Installation de preparation d'eau chaude sanitaire

Country Status (2)

Country Link
EP (1) EP3112767B1 (fr)
FR (1) FR3038367B1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003166749A (ja) * 2001-11-30 2003-06-13 Sanyo Electric Co Ltd ヒートポンプ給湯システム
EP1450110A2 (fr) * 2003-02-20 2004-08-25 Denso Corporation Système de distribution d'eau chaude avec réservoir de stockage
EP2098789A2 (fr) * 2008-03-05 2009-09-09 Zenex Technologies Limited Système de chauffage
WO2014038339A1 (fr) * 2012-09-04 2014-03-13 リンナイ株式会社 Système de chauffage

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003166749A (ja) * 2001-11-30 2003-06-13 Sanyo Electric Co Ltd ヒートポンプ給湯システム
EP1450110A2 (fr) * 2003-02-20 2004-08-25 Denso Corporation Système de distribution d'eau chaude avec réservoir de stockage
EP2098789A2 (fr) * 2008-03-05 2009-09-09 Zenex Technologies Limited Système de chauffage
WO2014038339A1 (fr) * 2012-09-04 2014-03-13 リンナイ株式会社 Système de chauffage

Also Published As

Publication number Publication date
FR3038367B1 (fr) 2019-08-09
EP3112767B1 (fr) 2022-12-21
FR3038367A1 (fr) 2017-01-06

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