SE2250684A1 - System for boosting a heat pump - Google Patents
System for boosting a heat pumpInfo
- Publication number
- SE2250684A1 SE2250684A1 SE2250684A SE2250684A SE2250684A1 SE 2250684 A1 SE2250684 A1 SE 2250684A1 SE 2250684 A SE2250684 A SE 2250684A SE 2250684 A SE2250684 A SE 2250684A SE 2250684 A1 SE2250684 A1 SE 2250684A1
- Authority
- SE
- Sweden
- Prior art keywords
- hot water
- return
- generating tank
- water generating
- temperature sensor
- Prior art date
Links
Classifications
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- 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
- F24D19/1009—Arrangement or mounting of control or safety devices for water heating systems for central heating
- F24D19/1039—Arrangement or mounting of control or safety devices for water heating systems for central heating the system uses a heat pump
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- 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
- F24D3/18—Hot-water central heating systems using heat pumps
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- 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
- F24D11/0235—Central heating systems using heat accumulated in storage masses using heat pumps water heating system with recuperation of waste energy
- F24D11/025—Central heating systems using heat accumulated in storage masses using heat pumps water heating system with recuperation of waste energy contained in waste water
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- 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
- F24D15/00—Other domestic- or space-heating systems
- F24D15/04—Other domestic- or space-heating systems using heat pumps
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- 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
- F24D2200/00—Heat sources or energy sources
- F24D2200/16—Waste heat
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- 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
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)
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
- Control Of The Air-Fuel Ratio Of Carburetors (AREA)
Abstract
There is provided a system comprising a heating subsystem for heating a building and a hot water subsystem comprising a hot water generating tank, the heating subsystem comprising a heat pump arranged to extract heat from a heat source with a known volume, which is replenished with a predetermined interval, where the system is configured to work in a working cycle which begins when the heat source is replenished and ends at the end of the predetermined interval, where the temperature of the heat source decreases during the working cycle, the heating subsystem comprising a return conduit with a return loop arranged to cool the return water by diverting at least a part of the return water to the hot water generating tank.
Description
System for boosting a heat pump Field of the invention This invention relates to a system for increasing the efficiency of a heat pump.
Background The efficiently ofa heat pump depends on the difference in temperatures between the heat source used and temperature of the return water on the hot side. When the temperature difference is large, the efficiency of the heat pump (COP) decreases. This may occur in dif- ferent situations. For example, when the heat pump draws heat from a source that is re- plenished, such as a wastewater reservoir, the temperature in the replenished source de- creases as heat is drawn from it. This may be a problem in particular during the cold season when the return water temperature is high.
This invention solves this and other problems.
Summary of invention ln a first aspect of the invention there is provided a system comprising a heating subsys- tem for heating a building and a hot water subsystem comprising a hot water generating tank, the heating subsystem comprising a heat pump arranged to extract heat from a heat source with a known volume, which is replenished with a predetermined interval, where the system is configured to work in a working cycle which begins when the heat source is replenished and ends at the end ofthe predetermined interval, where the temperature of the heat source decreases during the working cycle, the system comprising a heat source temperature sensor arranged to determine the temperature of the heat source, the heating subsystem comprising a return conduit with a return loop arranged to cool the return water by diverting at least a part of the return water to the hot water generating tank, the return loop comprising a return loop valve arranged to be able to divert a part ofthe return water to the hot wa- ter generating tank via an upper conduit and draw water from the hot water generating tank from a lower conduit, and to lead the return water back to the return conduit in or- der to cool the return water and to heat the hot water generating tank such that a ther- mocline is formed in the hot water generating tank, the heating subsystem further comprising a return water temperature sensor arranged downstream of the return loop, the hot water generating tank having at least one fixed level temperature sensor arranged at a known level in the hot water generating tank such that the volume of the hot water generating tank below the fixed level temperature sensor is known, the system comprising a control device configured to: at the beginning of the working cycle, determine the cooling potential in the hot water generating tank using the fixed level temperature sensor and to determine a return loop valve setting using the cooling potential.
The system has makes it possible to make the heat pump work more efficiently by cooling the return water to the heat pump. Determining the cooling potential makes it possible to make the use ofthe cooling water more efficient. ln various embodiments, the control device is configured to repeatedly adjust the setting of the return loop valve during the working cycle.
The control device may be configured to repeatedly during the working cycle receive tem- perature data from the heat source temperature sensor and the return water tempera- tUfe SenSOF, the control device further being configured to repeatedly during the working cycle adjust the return loop valve based on the remaining time of the working cycle, the temperature data from the heat source tem- pefatufe SQHSOI' afld the FetUFH Water tempefatufe SQHSOFS, in order to, at each determination, minimize the temperature difference between the heat source and the return water and such that the cooling potential of the hot water gen- erating tank is a low as possible at the end ofthe working cycle while lasting the entire working cycle.
For example, the setting of the return loop valve may be determined at least every 10 sec- onds.
The control device may be arranged to redetermine the cooling potential in the hot water generating tank during the working cycle using information from the fixed level tempera- tUfe SenSOF. ln various embodiments the hot water generating tank has a plurality of fixed level tem- perature sensors arranged at different levels in the hot water generating tank, where the volume ofthe hot water generating tank below each fixed level temperature sensor is known. This makes it possible to provide more detailed information about the cooling po- tential in the hot water generating tank. ln various embodiments, the system comprises a second heating source for providing heat to the heating subsystem or the hot water subsystem. The heat source may be a waste water tank. ln a second aspect of the invention there is provided a method involving a system com- prising a heating subsystem for heating a building and a hot water subsystem comprising a hot water generating tank, the heating subsystem comprising a heat pump arranged to extract heat from a heat source with a known volume, which is replenished with a predetermined interval, where the system is configured to work in a working cycle which begins when the heat source is replenished and ends at the end ofthe predetermined interval, where the temperature of the heat source decreases during the working cycle, the system comprising a heat source temperature sensor arranged to determine the temperature of the heat source, the heating subsystem comprising a return conduit with a return loop arranged to cool the return water by diverting at least a part of the return water to the hot water generating tank, the return loop comprising a return loop valve arranged to be able to divert a part ofthe return water to the hot wa- ter generating tank via an upper conduit and draw water from the hot water generating tank from a lower conduit, and to lead the return water back to the return conduit in or- der to cool the return water and to heat the hot water generating tank such that a ther- mocline is formed in the hot water generating tank, the heating subsystem further comprising a return water temperature sensor arranged downstream of the return loop, the hot water generating tank having at least one fixed level temperature sensor arranged at a known level in the hot water generating tank such that the volume of the hot water generating tank below the fixed level temperature sensor is known, the system comprising a control device arranged to: a) determine that the return water temperature is higher than the temperature determined by the fixed level temperature sensor, b) determine the cooling potential in the hot water generating tank, c) selecting a return loop valve setting based on the cooling potential.
Drawings Fig. 1 is a schematic drawing if a system.
Detailed description With reference to Fig. 1, system 100 comprises heating subsystem for heating a building comprising a heat pump 1, a heat source 2 on the cold side ofthe heat pump 1 from which the heat pump 1 extracts heat as is known in the art with the aid of conduits 3. The warm water source in heat source 2 is preferably replenished at times, for example by exchanging the water. This may be carried out at regular intervals. The interval for replenishment may be adjusted from time to time. A working cycle begins when the heat source 2 is replenished and ends at the end of the predetermined interval. The length ofthe working cycle may be for example at least 10 minutes, more preferably at least 30 minutes. ln some embodiments, the heat source 2 may comprise other fluids than water.
The warm water source 2 may be a tank. The heat source 2 may for example be a tank for wastewater, such as wastewater from industry, offices, hospitals, power plants or other buildings or infrastructure. However, heat source 2 may use any suitable fluid, such as a waste from paper pulp industry or a gas. The heat source 2 is preferably a tank with a known volume. The tank may comprise a heat exchanger being connected with the conduits 3 of the cold side of the heat pump 1.
A heat source temperature sensor 4 is arranged to determine the temperature of the heat source 2. The temperature information is provided to a control device 5.
The hot side of the heat pump 1 provides heated water from the heat pump 1 for heating, for example to radiators 22 and used water is returned in return conduit 6 as is known in the art. Heating may optionally be provided by a secondary heat source 7 which may be a district heating system.
The system 100 moreover comprises a hot water generating tank 8 for generating hot wa- ter, which is part of a hot water subsystem 9. The hot water subsystem 9 may for example be used for providing hot water to hot water taps. The hot water generating tank 8 com- prises a heat exchanger 10 in the hot water generating tank 8, such as for example a conduit formed as a several loops for leading water through the hot water generating tank 8 such that it is heated. Hot water subsystem can be filled using cold water inlet 23. Cold water inlet 23 may have a temperature sensor 24.
Hot water generating tank 8 may optionally be heated, if needed, by means of additional hot water heating system 20. The additional hot water generating system may be district heating or any other heat source, such as an electric heater.
Return conduit 6 is provided with return loop 11 which diverts a part of the return water to hot water generating tank 8, where it can be used to generate hot water. The diversion through return loop 11 is indicated with dashed arrows in Fig. 1. The amount of water that is diverted is determined by return loop valve 15, which is controlled by control device 5. The return loop valve 15 can preferably be continuously regulated between an open state to a closed state.
The return loop 11 is able to provide a part of the water from the return conduit 6 to the upper part of the hot water generating tank 8. The return loop 11 draws water from the lower part of the hot water generating tank 8 and returns it to the return conduit 6. A first part first part 11a ofthe return loop 11 is arranged with a conduit that provides return water 6 to an inlet arranged on the hot water generating tank 8 above an outlet for a second part 11 b of the return loop which provides water from the hot water generating tank 8 to the heat pump 1. The second part of 11b of the return loop 11 may be arranged to lead the water back to the return conduit 6 from the lower part of the hot water generating tank 8.
The temperature of return water from the radiators 22 is around 25°C to 70°C. System 100 is useful when the return water temperature is higher than water that is incoming into the hot water generating system (cold water inlet 23). When return water from radiators 22 is provided through the return loop 11 to the upper part of the hot water generating tank 8, the temperature in the hot water generating tank 8 increases. A thermocline 12 will form in the hot water generating tank 8, where the hot water is above the thermocline 12 and the cold water is below the thermocline 12. The thermocline 12 will gradually move downwards as the water in hot water generating tank 8 is heated. The water below the thermocline 12 will typically be cooler than the return water from the radiators 22.
The return conduit 6 furthermore has a return water temperature sensor 13 which prefer- ably is arranged downstream of the return loop 11. The return water temperature sensor 13 provides the temperature of the return water to the control device 5.
The hot water generating tank 8 has at least one fixed level temperature sensor 14 arranged such that the volume of the hot water generating tank 8 below the fixed level temperature sensor 14 is known. The fixed level temperature sensor 14 may be arranged at a known vertical position in the hot water tank. There may be more than one fixed level temperature sensor 14, and in that case the volume of the hot water generating tank 8 below each fixed level temperature sensor 14 is known. A second fixed level temperature sensor is indicated at 14b.
The control device 5 receives temperature values from the return water temperature sen- sor 13, the heat source temperature sensor 4 and the fixed level temperature sensor 14 and is able to provide a control signal to return loop valve 15. The control device 5 knows the state of openness of return loop valve 15. The control device 5 can comprise any suitable combination of software and hardware. Any suitable software can be used. The control de- vice 5 may comprise a memory a processor, a bus and a communication interface. The memory of control device 4 is able to store data about volumes, temperatures and time in the system 100. Communication between control device 5 and the temperature sensors and the control device 5 and the return loop valve 15 may be carried in any suitable manner for example wirelessly or by wire, where wire is preferred. The memory of control device 5 may have stored information about the volume of the hot water generating tank 8 below each of the fixed level temperature sensors 14, 14b.
The temperature sensors are preferably arranged to provide temperature values to the con- trol device 5 at least every ten seconds or more preferably at least every second. The control device 5 may also comprise a timer. The control device 5 is also able to control or determine when the working cycle starts, that is when the heat source 2 is replenished. This may start the timer ofthe control device 5. The control device 5 may be able to control the beginning ofthe working cycle by initiating replenishment of the heat source 2.
The hot water generating tank 8 is used to cool the return water from radiators 22 in order to optimize the efficiency ofthe heat pump 1. The control device 5 is arranged to optimize the use of the cooling potential of the hot water generating tank 8 in order to portion it during the working cycle. The cooling potential can be defined as the amount of energy in in the hot water generating tank 8 below the thermocline 12, when the temperature below the thermocline 12 is lower than the return water from the radiators 22. ln the beginning of the working cycle the temperature in the heat source 2 is high (often around 25°C-30°C) and the difference between the temperature in the heat source 2 and the return water from radiators 22 is comparatively small. However, during the working cycle the temperature in the heat source 2 decreases which increases the temperature dif- ference between the heat source 2 and the return waterfrom the radiator 22. The inventive system compensates for this by cooling the return water by mixing it with the water in the hot water generating tank 8, thereby providing higher efficiency (COP) of the heat pump 1.
Gradually the temperature in the hot water generating tank 8 increases and the thermocline 12 will move downwards. When the thermocline 12 has reached the bottom of the hot wa- ter generating tank 8 there is no more cooling potential left in the hot water generating tank 8.
The control device 5 is arranged to, at the beginning ofthe working cycle, determine a cool- ing potential ofthe hot water generating tank 8. The cooling potential can be defined as the amount of energy in the water in the hot water generating tank 8 below the thermocline 12. ln order to determine the volume of water below the thermocline 12, data from the fixed level temperature sensor 14 is used by control device 5. lf the temperature at the fixed level temperature sensor 14 is below a threshold, it is determined that the thermocline is at or above the fixed level temperature sensor 14. The threshold may be the return water temperature from radiators 22. The threshold may be the return water temperature minus an offset. Since the volume below the fixed level temperature sensor 14 is known, the amount of water available for cooling can be determined.
The aim is that the thermocline 12 reaches the bottom of the hot water generating tank 8 as close as possible to the end of the working cycle while keeping the temperature differ- ence between the return water as determined by return water temperature sensor 13 and the heat source 2 as low as possible. ln the beginning of the working cycle, only a small amount (if any) of return water may be directed to the return loop 11 and the return loop valve 15 may be closed, but as the heat source cools 2 and the temperature difference increases during the working cycle the return loop valve 15 may be able to divert more and more return water to the return loop 11. lt is suitable that the cooling potential of the hot water generating tank 8 lasts the whole work- ing cycle, otherwise the heat pump 1 will be inefficient at the end ofthe working cycle. ln one embodiment the control device 5, after having determined the amount of cooling power in the hot water generating tank 8, selects or determines a work profile for the return loop valve 15. The work profile is selected or based on the amount of cooling potential in the hot water generating tank. The work profile determines how the return loop valve 15 opens during the working cycle. ln one embodiment the return loop valve 15 opens to a predetermined setting av after a predetermined time. For example, the return loop valve 15 is closed at the beginning of the working cycle but opens to 30% after 15 minutes of the working cycle. The work profile pattern may comprise a plurality of settings for the return loop valve 15 during the work cycle. ln one embodiment a curve for opening the return loop valve 15 during the cycle is selected. A work profile can be selected based on previous behavior of the system 100, for example using the starting temperature in the heat source 2 and the return water temperature in return conduit 6. The work profile may be selected based on historical temperatures of the return conduit, for example the temperature in return conduit during a previous working cycle. The temperature in the return conduit is provided from the return water temperature sensor 13 to the control device 5.
The control device 5 is preferably able to repeatedly adjust the setting of the return loop valve 15 during the working cycle. The control device 5 may be able to repeatedly during the working cycle calculate the amount of cooling water (water below the thermocline 12) that is left, and to what extent the return loop shunt 15 should be open in order to make the cooling potential last to the end of the working cycle, while using all of the cooling po- tential in the hot water generating tank 8 during the working cycle. Control device 5 may use return loop valve 15 history for the working cycle, including settings length oftime these setting were used to determine how much water has passed through the return loop 11 and hence how much cooling potential has been used and hence how much cooling potential is left in the tank 8 and use this value for the next determination (unless cooling potential is reset as described below). ln various embodiments return loop 11 may have a flow meter for measuring how much water has run trough return loop 11.
To achieve this, the control device 5 uses the remaining time of the working cycle and the temperature data from the return water temperature sensor 13 and the heat source tem- perature sensor 4 as input.
The control device may carry out the determination and provide a control signal to the re- turn loop valve 15 at least every 5 minutes, more preferably at least every minute and most preferably at least every 10 seconds.
The determination can be done in any suitable manner. ln one embodiment, the control device 5 may determine how long time the cooling potential could last using the current setting of the return loop valve 15. This is referred to as the return loop valve run time.
Return loop valve 15 setting can be determined as: Energy content in hot water generation tank * return loop valve run time/ Energy content in warm water source * remaining cycle time. 11 ln various embodiments, a co-efficient of performance (COP) value for the heat pump may be determined and used for optimization of the setting ofthe return loop valve 15. ln various embodiments, the control device 5 may use temperature data from the fixed level temperature sensor 14 also during the working cycle (and not only at the beginning of the working cycle). lf the fixed level temperature sensor 14 detects that the thermocline 12 is still at the level of the fixed level temperature sensor 14 at some time point after the begin- ning ofthe working cycle, the control device 5 may reset the cooling potential for the work- ing cycle. This may cause a more generous cooling scheme during the remainder of the working cycle.
As mentioned above, in various embodiment, there may be more than one fixed level tem- perature sensor 14, where each temperature sensor is arranged at a known level. The vol- ume ofthe hot water generating tank 8 below each sensor 14 is known, and can be used by control device to determine the current cooling potential in the hot water generating tank 8.
The control device 5 may carry out a method comprising first determine that the return water temperature from return water 6 is higher as provided by return water temperature sensor 13 is higher than the temperature in the hot water generating tank 8 as determined by at least one fixed level temperature sensor 14. This means that there is a cooling poten- tial in the hot water generating tank 8. The control device 5 then proceeds to determine the amount of cooling potential in the hot water generating tank 8. The control device 5 may multiply the volume below the fixed level temperature sensor 14 with the temperature to determine the energy content ofthe volume below the fixed level temperature sensor 14.
When hot water generating tank 8 has a plurality of fixed level temperature sensors 14, the control device 5 uses the volume and temperature associated with the highest fixed level temperature sensor 14 that has a temperature that is lower than the return water temper- atUFe. 12 The control device 5 then proceeds to determine a return loop valve setting for the working cycle. The control device 5 then controls the return loop valve 15 during the working cycle, for example by providing a control signal to the return loop valve 15. As mentioned above, the control device 5 may re-determine the cooling potential during the working cycle, and use this information to select a new working profile for the return loop valve 15.
The control device 5 may, as described above, repeatedly during the working cycle deter- mine a return loop valve 15 setting using updated information from the return water tem- perature sensor 13 and the heat source temperature sensor 4.
Claims (9)
1.Claims
2.A system comprising a heating subsystem for heating a building and a hot water subsystem comprising a hot water generating tank, the heating subsystem comprising a heat pump arranged to extract heat from a heat source with a known volume, which is replenished with a predetermined in- terval, where the system is configured to work in a working cycle which begins when the heat source is replenished and ends at the end ofthe predetermined in- terval, where the temperature of the heat source decreases during the working cy- cle, the system comprising a heat source temperature sensor arranged to deter- mine the temperature ofthe heat source, the heating subsystem comprising a return conduit with a return loop arranged to cool the return water by diverting at least a part of the return water to the hot wa- ter generating tank, the return loop comprising a return loop valve arranged to be able to divert a part ofthe return water to the hot water generating tank via an upper conduit and draw water from the hot water generating tank from a lower conduit, and to lead the return water back to the re- turn conduit in order to cool the return water and to heat the hot water generating tank such that a thermocline is formed in the hot water generating tank, the heating subsystem further comprising a return water temperature sensor ar- ranged downstream of the return loop, the hot water generating tank having at least one fixed level temperature sensor arranged at a known level in the hot water generating tank such that the volume of the hot water generating tank below the fixed level temperature sensor is known, the system comprising a control device configured to: at the beginning of the working cycle, determine the cooling potential in the hot water generating tank using the fixed level temperature sensor and to determine a return loop valve setting using the cooling potential.
3.The system of claim 1 where the control device is configured to repeatedly adjust the setting of the return loop valve during the working cycle.3. The system of any one of claims 1 or 2 where the control device is configured to repeatedly during the working cycle receive temperature data from the heat source temperature sensor and the return water temperature sensor, the control device further being configured to repeatedly during the work- ing cycle adjust the return loop valve based on the remaining time of the working cycle, the temperature data from the heat source temperature sensor and the return water temperature sensors, in order to, at each determination, minimize the temperature difference between the heat source and the return water and such that the cooling potential of the hot water generating tank is a low as possible at the end of the working cy- cle while lasting the entire working cycle.
4. The system of any one of claims 2 or 3 where the setting ofthe return loop valve is determined at least every 10 seconds.
5. The system of any one of claims 1 to 4 where the control device is arranged to re- determine the cooling potential in the hot water generating tank during the work- ing cycle using information from the fixed level temperature sensor.
6. The system of any one of claims 1 to 5 where the hot water generating tank has a plurality of fixed level temperature sensors arranged at different levels in the hot water generating tank, where the volume of the hot water generating tank below each fixed level temperature sensor is known.
7. The system of any one of claims 1 to 6 where the heat source is a wastewater tank.
8. The system of any one of claim 1 to 7 where the system comprises a second heat- ing source for providing heat to the heating subsystem or the hot water subsys- fem.
9. A method involving a system comprising a heating subsystem for heating a building and a hot water subsystem comprising a hot water generating tank, the heating subsystem comprising a heat pump arranged to extract heat from a heat source with a known volume, which is replenished with a predetermined in- terval, where the system is configured to work in a working cycle which begins when the heat source is replenished and ends at the end ofthe predetermined in- terval, where the temperature of the heat source decreases during the working cy- cle, the system comprising a heat source temperature sensor arranged to deter- mine the temperature ofthe heat source, the heating subsystem comprising a return conduit with a return loop arranged to cool the return water by diverting at least a part of the return water to the hot wa- ter generating tank, the return loop comprising a return loop valve arranged to be able to divert a part ofthe return water to the hot water generating tank via an upper conduit and draw water from the hot water generating tank from a lower conduit, and to lead the return water back to the re- turn conduit in order to cool the return water and to heat the hot water generating tank such that a thermocline is formed in the hot water generating tank, the heating subsystem further comprising a return water temperature sensor ar- ranged downstream of the return loop, the hot water generating tank having at least one fixed level temperature sensor arranged at a known level in the hot water generating tank such that the volume of the hot water generating tank below the fixed level temperature sensor is known, the system comprising a control device arranged to: a) determine that the return water temperature is higher than the temperature determined by the fixed level temperature sensor, b) determine the cooling potential in the hot water generating tank, c) selecting a return loop valve setting based on the cooling potential.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE2250684A SE2250684A1 (en) | 2022-06-07 | 2022-06-07 | System for boosting a heat pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE2250684A SE2250684A1 (en) | 2022-06-07 | 2022-06-07 | System for boosting a heat pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SE2250684A1 true SE2250684A1 (en) | 2023-05-12 |
Family
ID=86605890
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SE2250684A SE2250684A1 (en) | 2022-06-07 | 2022-06-07 | System for boosting a heat pump |
Country Status (1)
| Country | Link |
|---|---|
| SE (1) | SE2250684A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2826917C1 (en) * | 2024-02-15 | 2024-09-18 | Ооо "Реворм" | Method of connecting low-potential heat source to hot water supply system |
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|---|---|---|---|---|
| GB1482518A (en) * | 1974-10-24 | 1977-08-10 | Evans J | Solar heating system |
| SE8101129L (en) * | 1981-02-20 | 1982-08-21 | Parca Norrahammar Ab | HEATING INSTALLATION AND DEVICE |
| CN2937887Y (en) * | 2006-04-24 | 2007-08-22 | 李育锋 | Heat-pump heating system of using circulation water |
| CN107842897A (en) * | 2017-11-30 | 2018-03-27 | 陈斌 | CO2 floor heatings heat pump realizes confession, the efficient transcritical operation heat exchange enclosed circulation heating water system of the small temperature difference of backwater |
| CN209840247U (en) * | 2019-01-25 | 2019-12-24 | 河北道荣新能源科技有限公司 | Outdoor solar energy and heat pump combined heating automatic drainage anti-freezing system |
| US20200056846A1 (en) * | 2016-10-25 | 2020-02-20 | Ecoclime AB | Recovery system and method for recovery of thermal energy from waste water |
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2022
- 2022-06-07 SE SE2250684A patent/SE2250684A1/en not_active Application Discontinuation
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1482518A (en) * | 1974-10-24 | 1977-08-10 | Evans J | Solar heating system |
| SE8101129L (en) * | 1981-02-20 | 1982-08-21 | Parca Norrahammar Ab | HEATING INSTALLATION AND DEVICE |
| CN2937887Y (en) * | 2006-04-24 | 2007-08-22 | 李育锋 | Heat-pump heating system of using circulation water |
| US20200056846A1 (en) * | 2016-10-25 | 2020-02-20 | Ecoclime AB | Recovery system and method for recovery of thermal energy from waste water |
| CN107842897A (en) * | 2017-11-30 | 2018-03-27 | 陈斌 | CO2 floor heatings heat pump realizes confession, the efficient transcritical operation heat exchange enclosed circulation heating water system of the small temperature difference of backwater |
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| RU2826917C1 (en) * | 2024-02-15 | 2024-09-18 | Ооо "Реворм" | Method of connecting low-potential heat source to hot water supply system |
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