EP4160096A1 - Système de chauffage hybride pour fournir de l'eau sanitaire et de la chaleur de chauffage - Google Patents

Système de chauffage hybride pour fournir de l'eau sanitaire et de la chaleur de chauffage Download PDF

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Publication number
EP4160096A1
EP4160096A1 EP22190923.7A EP22190923A EP4160096A1 EP 4160096 A1 EP4160096 A1 EP 4160096A1 EP 22190923 A EP22190923 A EP 22190923A EP 4160096 A1 EP4160096 A1 EP 4160096A1
Authority
EP
European Patent Office
Prior art keywords
heat
return
flow
heat pump
storage tank
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.)
Withdrawn
Application number
EP22190923.7A
Other languages
German (de)
English (en)
Inventor
Hermann Stumpp
Armin Marko
Daniel Neubert
Christian Glueck
Dennis Becker
Waldemar Ott
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
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP4160096A1 publication Critical patent/EP4160096A1/fr
Withdrawn legal-status Critical Current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
    • F24D3/00—Hot-water central heating systems
    • F24D3/08—Hot-water central heating systems in combination with systems for domestic hot-water supply
    • F24D3/082—Hot water storage tanks specially adapted therefor
    • 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
    • F24D11/00—Central heating systems using heat accumulated in storage masses
    • F24D11/02—Central heating systems using heat accumulated in storage masses using heat pumps
    • F24D11/0214—Central heating systems using heat accumulated in storage masses using heat pumps water heating system
    • F24D11/0228—Central heating systems using heat accumulated in storage masses using heat pumps water heating system combined with conventional heater
    • 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
    • F24D3/00—Hot-water central heating systems
    • F24D3/10—Feed-line arrangements, e.g. providing for heat-accumulator tanks, expansion tanks ; Hydraulic components of a central heating system
    • F24D3/1091—Mixing cylinders
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/10—Control of fluid heaters characterised by the purpose of the control
    • F24H15/156—Reducing the quantity of energy consumed; Increasing efficiency
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/20—Control of fluid heaters characterised by control inputs
    • F24H15/212—Temperature of the water
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/20—Control of fluid heaters characterised by control inputs
    • F24H15/238—Flow rate
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/30—Control of fluid heaters characterised by control outputs; characterised by the components to be controlled
    • F24H15/305—Control of valves
    • F24H15/32—Control of valves of switching valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/30—Control of fluid heaters characterised by control outputs; characterised by the components to be controlled
    • F24H15/335—Control of pumps, e.g. on-off control

Definitions

  • the present invention relates to a hybrid heating system for providing service water and heating, comprising a heat pump and a heater with a heat cell, with a service water storage tank being temperature-controlled by the heat pump and/or the heat cell using a heat transfer medium.
  • Hybrid heating systems are known from the prior art, in which a heat pump and a heating device designed as a gas condensing boiler work together in a hydraulic parallel circuit.
  • the heat pump loads a downstream buffer tank and is thus hydraulically decoupled from an associated consumer circuit.
  • a circulating pump can be used to adjust the volume flow and temperature spread to a corresponding condenser of the heat pump according to the respective operating requirements.
  • a return flow from the hybrid heating system is connected directly to the buffer storage tank in order to enable the heat pump to work at the lowest possible temperature.
  • such a hydraulic connection requires a certain amount of space, since the buffer storage tank must also be installed in addition to a corresponding service water storage tank.
  • a buffer storage represents a significant cost driver of such a hybrid heating system.
  • the hot water preparation is carried out exclusively by the heat pump, which requires a separate, preferably electrically operated heating element with regard to a periodically necessary thermal disinfection of the water in the service water storage tank.
  • the heating element increases the complexity of the overall system and increases its operating and investment costs.
  • the present invention relates to a hybrid heating system for providing service water and heating, comprising a heat pump and a heater with a heat cell, with a service water storage tank being temperature-controlled by the heat pump and/or the heat cell using a heat transfer medium.
  • the heat pump is coupled to a heating circuit by means of a hydraulic switch, with the heat pump and the heat cell being connected in series to the service water storage tank.
  • the hybrid heating system requires significantly less space.
  • a heat exchanger of the domestic water storage tank of the hybrid heating system preferably has the heat transfer medium flowing through it permanently and therefore has no thermal stratification, but rather an essentially homogeneous temperature distribution.
  • the corresponding investment and maintenance costs are reduced, and the lack of water volume in a buffer storage means that the heat is provided more efficiently and dynamically.
  • a comparatively low return temperature for the heat pump is also guaranteed.
  • the adjustability of a volume flow and a temperature spread of the heat transfer medium is possible at a corresponding condenser of the heat pump.
  • a separate heating rod for periodic disinfection of the domestic water storage tank by heating the domestic water to around 100 °C is unnecessary, as the heat cell preferably assumes this function.
  • the serial connection of the heat pump and the heat cell to the service water storage tank means that the hybrid heating system has a particularly simple construction.
  • the heat transfer medium preferably contains water.
  • water can be filled without any problems. If necessary, the water can be mixed with additives for corrosion and/or frost protection. In addition, water as a heat transfer medium has a high heat capacity.
  • the service water storage tank preferably has a heat exchanger.
  • the service water storage tank By using the service water storage tank, the use of a conventional buffer storage tank to connect the heat pump is no longer necessary.
  • the service water storage tank allows a defined volume of service water to be released immediately at an almost constant temperature level. Due to the use of a monovalent service water storage tank with only one heat exchanger, the construction is particularly simple, which leads to reduced installation and maintenance costs.
  • a flow of the heat pump is preferably connected to a first flow of the hydraulic switch and a return of the heat pump is connected to a first return of the hydraulic switch, with a first pump being arranged in the return of the heat pump or in the flow of the heat pump.
  • the hydraulic switch ensures complete hydraulic decoupling of the heat pump from the heating circuit without the need for a large-volume buffer tank.
  • the heat pump can work at an advantageously low temperature level, since it is connected directly to the return of the hydraulic switch, which represents a cold pole or the coldest point of the entire hybrid heating system.
  • a flow of the heat cell is connected to a flow of the heat exchanger of the service water storage tank and to a flow of the heating circuit by means of a first 3-way actuator, and a return of the heat cell is connected to a second flow of the low loss header, with the return of the heat cell or a second pump is arranged in the flow of the heat cell.
  • the return of the heat cell is subjected to the increased temperature level of the second flow of the hydraulic separator.
  • the flow of the heating circuit is connected to at least one flow of at least one thermal consumer of the heating circuit
  • the second return of the low loss header is connected to a return of the heat exchanger of the service water storage tank.
  • the second return of the low loss header is connected to at least one return of the at least one thermal consumer of the heating circuit via a return of the heating circuit.
  • radiators such as ribbed radiators, which require a significantly higher flow temperature than underfloor heating or panel radiators, can also be used with the hybrid heating system.
  • At least one consumption point for the service water is connected to an outlet of the service water storage tank, and an input of the service water storage tank is connected by means of a second 3-way actuator to a service water inflow and to a connecting line that is connected to the output of the service water storage tank.
  • cold water can be admixed at the outlet of the service water storage tank by means of the external service water inflow.
  • the process water inflow is preferably connected to the public water supply network.
  • a control and/or regulating device is preferably provided.
  • control and/or regulating device can be used to comprehensively monitor the 3-way actuators and the two pumps in order to achieve the highest possible energy efficiency of the hybrid heating system under all operating conditions.
  • the control and/or regulating device is preferably assigned a large number of temperature and flow rate sensors for detecting essential physical parameters of the heat transfer medium and the process water.
  • the temperature and flow rate sensors can be placed, for example, in the area of the supply lines, the return lines, the domestic water storage tank, the heat cell, the heat pump, the hydraulic switch, the at least one consumption point for domestic water, the at least one thermal consumer or in the outside environment.
  • the temperature of the heat exchanger of the service water storage tank can preferably be controlled by the heat cell and/or the heat pump by means of the control and/or regulating device.
  • Hybrid heating system 100 for providing service water 146 and heating.
  • Hybrid heating system 100 includes, among other things, a heat pump 110 and a heater 120 with a heat cell 122, as well as an electronic control and/or regulating device 220, with a service water storage tank 140 preferably being able to be temperature-controlled by heat pump 110 and/or heat cell 122 using a heat transfer medium 124 .
  • the heat cell 122 can be designed as a boiler. Furthermore, the heat cell 122 can be fired with (natural) gas, hydrogen, oil, coal or wood pellets, for example.
  • the heater 120 can be designed as a condensing boiler.
  • a fuel cell fed with methane or hydrogen or a purely electrical (resistance) heater can be provided as a heat generator, for example.
  • the heating device 120 or the alternative heat generator is preferably operated at a higher, in particular significantly higher, temperature level compared to the heat pump 110 .
  • the heat pump 110 is preferably coupled to a heating circuit 180 by means of a hydraulic switch 130 housed in a housing 132 , with the heat pump 110 and the heat cell 122 being connected in series to the service water storage tank 140 .
  • a large-volume buffer storage tank which would otherwise have to be provided for operating the heat pump 110, is unnecessary, since the low loss header 130 always ensures a minimum volumetric flow of the heat transfer medium 124 required for operation through a condenser of the heat pump 110--not shown for the sake of clarity in the drawing.
  • the serial connection of the heat pump 110 with the heat cell 122 and the service water storage tank 140 results in a comparatively simple hydraulic structure for the entire hybrid heating system 100.
  • the heat transfer medium 124 is preferably water, which is mixed with additives, in particular for corrosion and/or frost protection can be.
  • the service water storage tank 140 is preferably monovalent and therefore has only one helical or spiral heat exchanger 142, which is completely surrounded by the service water 146 or is immersed in it.
  • a flow V 1 of the heat pump 110 is illustratively connected to a first flow V 2 of the low loss header 130 .
  • a return R 1 of the heat pump 110 is connected to a first return R 2 of the hydraulic separator 130 , for example.
  • a first pump 150 is preferably provided within the return R 1 of the heat pump 110 .
  • the first pump 150 can also be provided in the flow V 1 of the heat pump 110 .
  • the heat transfer medium 124 can preferably be conveyed through the condenser of the heat pump 110 and the hydraulic switch 130 into the supply lines V 2.6 and return lines R 2.3 emanating from this.
  • the return R 1 of the heat pump 110 is preferably connected to the coldest point of the hybrid heating system 100 or to its cold pole in the form of the returns R 2,3 of the low loss header 130, resulting in a particularly energy-efficient operation of the heat pump 110. From the returns R 2,3 of the low loss header 130, a return R 4 of the service water storage tank 140 and a return R 6 of the heating circuit 180 or a return R 7 of at least one thermal consumer 190 connected to the heating circuit 180 lead off illustratively.
  • a flow V 3 of the heat cell 122 is illustratively connected by means of a first 3-way actuator 160 to a flow V 4 of the heat exchanger 142 of the service water storage tank 140 and to a flow V 5 of the heating circuit 180 to be supplied with heat.
  • a return R 5 of the heat cell 122 is connected to the second flow V 6 of the hydraulic separator 130 , for example.
  • a second pump 152 preferably operated by an electric motor, is provided for illustrative purposes.
  • the second Pump 152 may be arranged in the flow V 3 of the heat cell 122 .
  • the heat transfer medium 124 can be conveyed by means of the second pump 152, preferably through the heat cell 122 of the heating device 120 and the heating circuit 180 with the at least one thermal consumer 190 connected thereto via a flow V 7 .
  • the at least one thermal load 190 can be, for example, a conventional (ribbed) radiator (not shown), a convector, a panel radiator or panel radiator, underfloor heating, a ceiling radiator or the like.
  • the second return R 3 of the low loss header 130 is preferably coupled to the return R 4 of the heat exchanger 142 of the service water storage tank 140 and to the return R 6 of the heating circuit 180, to which, illustratively, the at least one return R 7 of the at least one thermal consumer 190 of the heating circuit is connected 180 is connected.
  • At least one consumption point 200 for temperature-controlled domestic water 146 or a domestic water tap point is connected to an output A 1 of the domestic water storage tank 140 .
  • the point of consumption 200 can be, for example, a shower head, a bathtub inlet, a faucet or the like.
  • An input E 1 of the service water storage tank 140 is illustratively connected by means of a second 3-way actuator 162 to a service water inflow 210 , for example from the public water supply network, for the supply of service water 146 at a low temperature and to a connecting line 212 .
  • the connecting line 212 is in turn connected, for example, to the output A 1 of the service water storage tank 140 , so that the consumption point 200 can be admixed with the second 3-way actuator 162 for quick temperature control if required.
  • the 3-way actuators 160, 162 that are preferably assigned to it, as well as the two electric motor-driven pumps 150, 152, are preferably activated as a function of a large number of temperature and flow sensors, not shown for the sake of a better overview of the drawings comprehensively controlled, i.e. regulated and/or controlled.
  • temperature and flow sensors In addition to temperature and flow sensors, other types of sensors can be provided. As a result, its high energy efficiency is guaranteed under all practically occurring operating conditions of the hybrid heating system 100 .
  • Associated temperature and flow rate sensors can be used, for example, within the supply lines V 1,...,7 , the returns R 1,...,7 , the service water inflow 210, in the connecting line 212, in the area of the service water storage tank 140 to record the temperature of the domestic water 146 stored therein, in the area of the consumption point 200, in the area of the heat exchanger 142, in the area of the low loss header 130, in the area of the heat pump 110, in the area of the heat cell 122, in the area of the at least one thermal consumer 190 or in an external environment of a Hybrid heating system 100 to be placed at temperature-controlled building.
  • the two 3-way actuators 160, 162 which can preferably be actuated by an electric motor, preferably have no individually switchable connections, which is symbolized by the three unfilled triangles in each case.
  • the 3-way actuators 160, 162 can be designed, for example, as continuously operating 3-way mixing valves, as intermittently acting switching or switching valves, or as a combination thereof.
  • the heat transfer medium 124 preferably flows permanently through the heat cell 122 of the heating device 120.
  • the heat exchanger 142 in the service water storage tank 140 is preferably supplied with the necessary, i.e. in particular according to user specifications, sufficient heat depending on the current state of the second 3-way actuator 162 controlled by the control and/or regulating device 220, whereby a corresponding temperature of the service water 146 stored in the service water tank 140 sets.
  • both the heat pump 110 and the heater 120 can control the temperature of the service water 146 in the service water storage tank 140 by means of the heat exchanger 142 independently of one another or together.
  • the hybrid heating system 100 Due to the integration of heat pump 110 by means of low loss header 130 instead of a conventional buffer tank that would otherwise have to be provided, preference is given to, among other things, a volume flow and a temperature spread of heat transfer medium 124 at the condenser of heat pump 110, which is not shown in the drawing - i.e. in the area of flow V 1 and the return R 1 of the heat pump 110 - influenced. Due to the omitted large-volume buffer storage, the hybrid heating system 100 enables an energy-efficient provision of heating and temperature-controlled service water 146, since a direct heat supply of the heating circuit 180 and the Hot water tank 140 by means of the heat pump 110 and/or the heater 120 is more energy-efficient than indirect temperature control by means of the heat temporarily stored in a large-volume buffer memory. At the same time, the hybrid heating system 100 allows for a reduced space requirement and reduced investment and maintenance costs.

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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)
  • Fluid Mechanics (AREA)
  • Water Supply & Treatment (AREA)
  • Steam Or Hot-Water Central Heating Systems (AREA)
EP22190923.7A 2021-10-04 2022-08-18 Système de chauffage hybride pour fournir de l'eau sanitaire et de la chaleur de chauffage Withdrawn EP4160096A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102021211128.9A DE102021211128A1 (de) 2021-10-04 2021-10-04 Hybridheizsystem zum Bereitstellen von Brauchwasser und Heizungswärme

Publications (1)

Publication Number Publication Date
EP4160096A1 true EP4160096A1 (fr) 2023-04-05

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EP22190923.7A Withdrawn EP4160096A1 (fr) 2021-10-04 2022-08-18 Système de chauffage hybride pour fournir de l'eau sanitaire et de la chaleur de chauffage

Country Status (2)

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EP (1) EP4160096A1 (fr)
DE (1) DE102021211128A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1764561A1 (fr) * 2005-09-16 2007-03-21 RWE Fuel Cells GmbH Procédé d'opération d'une installation de production d'énergie thermique
EP2159495A1 (fr) * 2008-08-25 2010-03-03 Honeywell Technologies Sarl Contrôleur pour un système de contrôle de la température
DE102009011715A1 (de) * 2009-03-09 2010-09-16 Solarhybrid Ag Hydraulische Weiche zum Anschluss von Wärmeerzeugern an eine Heizungsanlage, Heizungsanlage und Verfahren zum Betrieb einer Heizungsanlage
EP3073200A1 (fr) * 2015-03-27 2016-09-28 Robert Bosch Gmbh Aiguillage hydraulique chauffe destine a l'integration de chaleur externe

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1764561A1 (fr) * 2005-09-16 2007-03-21 RWE Fuel Cells GmbH Procédé d'opération d'une installation de production d'énergie thermique
EP2159495A1 (fr) * 2008-08-25 2010-03-03 Honeywell Technologies Sarl Contrôleur pour un système de contrôle de la température
DE102009011715A1 (de) * 2009-03-09 2010-09-16 Solarhybrid Ag Hydraulische Weiche zum Anschluss von Wärmeerzeugern an eine Heizungsanlage, Heizungsanlage und Verfahren zum Betrieb einer Heizungsanlage
EP3073200A1 (fr) * 2015-03-27 2016-09-28 Robert Bosch Gmbh Aiguillage hydraulique chauffe destine a l'integration de chaleur externe

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DE102021211128A1 (de) 2023-04-06

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