WO2014070096A1 - Method for operating an arrangement for storing thermal energy - Google Patents
Method for operating an arrangement for storing thermal energy Download PDFInfo
- Publication number
- WO2014070096A1 WO2014070096A1 PCT/SE2013/051281 SE2013051281W WO2014070096A1 WO 2014070096 A1 WO2014070096 A1 WO 2014070096A1 SE 2013051281 W SE2013051281 W SE 2013051281W WO 2014070096 A1 WO2014070096 A1 WO 2014070096A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- energy
- temperature
- heat
- energy storage
- previous
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims abstract description 31
- 238000004146 energy storage Methods 0.000 claims abstract description 76
- 238000001816 cooling Methods 0.000 claims description 39
- 238000010438 heat treatment Methods 0.000 claims description 25
- 238000013517 stratification Methods 0.000 claims description 5
- 238000003860 storage Methods 0.000 description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 17
- 239000012530 fluid Substances 0.000 description 12
- 238000004891 communication Methods 0.000 description 6
- 230000003247 decreasing effect Effects 0.000 description 3
- 239000008399 tap water Substances 0.000 description 3
- 235000020679 tap water Nutrition 0.000 description 3
- 239000002551 biofuel Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 239000002803 fossil fuel Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 239000002918 waste heat Substances 0.000 description 2
- 241000282414 Homo sapiens Species 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 235000020188 drinking water Nutrition 0.000 description 1
- 239000003651 drinking water Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000001932 seasonal effect Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D20/00—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00
- F28D20/0034—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00 using liquid heat storage material
-
- 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
- F24D19/1066—Arrangement or mounting of control or safety devices for water heating systems for the combination of central heating and domestic hot water
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D20/00—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00
- F28D20/0034—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00 using liquid heat storage material
- F28D20/0039—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00 using liquid heat storage material with stratification of the heat storage material
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D20/00—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00
- F28D20/0052—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00 using the ground body or aquifers as heat storage medium
-
- 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
-
- 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
- F24D2200/11—Geothermal energy
-
- 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
- F24D2200/12—Heat pump
- F24D2200/123—Compression type heat pumps
-
- 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
- F24H4/00—Fluid heaters characterised by the use of heat pumps
- F24H4/02—Water heaters
- F24H4/04—Storage heaters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D20/00—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00
- F28D20/0034—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00 using liquid heat storage material
- F28D20/0043—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00 using liquid heat storage material specially adapted for long-term heat storage; Underground tanks; Floating reservoirs; Pools; Ponds
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D20/00—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00
- F28D2020/0065—Details, e.g. particular heat storage tanks, auxiliary members within tanks
- F28D2020/0069—Distributing arrangements; Fluid deflecting means
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B10/00—Integration of renewable energy sources in buildings
- Y02B10/40—Geothermal heat-pumps
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/14—Thermal energy storage
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
- Y02P80/15—On-site combined power, heat or cool generation or distribution, e.g. combined heat and power [CHP] supply
Definitions
- the present invention relates to a method for operating an
- Thermal energy may advantageously be stored in a fluid, such as e.g. water, above ground in insulated tanks, in ground in insulated pits, or underground in excavated caverns, using the surrounding ground as insulation.
- a fluid such as e.g. water, above ground in insulated tanks, in ground in insulated pits, or underground in excavated caverns, using the surrounding ground as insulation.
- the thermal energy of the fluid is preserved to a great extent during an extended period of time.
- these methods are used in different parts of the world in order to satisfy the need for storing thermal energy between different seasons, e.g. storing temporary surplus heat which is used later on when there is a demand for it and, preferably, when its financial value is higher.
- the main transition of energy is from the summer half, when there is less need for heating, to the winter half, when the need for heating is much higher.
- the intermediate temperature is not high enough to be used for different types of heating and it is not low enough to be used for cooling.
- An object according to an aspect of present invention is to provide a method for operating an arrangement for storing thermal energy which renders the arrangement more efficient during use.
- a method for operating an arrangement for storing thermal energy comprising an energy storage having a vertical temperature gradient and wherein the method comprises retrieving energy of a first temperature from the energy storage for use in a first heat-absorbing system , such that free space is created in the energy storage for energy of a second
- the energy of the second temperature may have a broader field of application than the energy of the first temperature and may be used in a second heat-absorbing system , which may be a high temperature system .
- the first temperature may be in the range of 15 ° C to 65 ° C
- the second temperature may be in the range of 50 ° C to 100 ° C.
- the method may further comprise receiving energy from the first heat-absorbing system , the energy being of a third temperature which is lower than the first and second temperature, and providing the energy at a level of the energy storage being of the third temperature.
- the temperature of the fluid has decreased and the energy is therefore provided at a level in the energy storage where the temperature is lower than the first and second
- the third temperature may be in the range of 4 ° C to 25 ° C.
- Energy having this third temperature may then be used in a cooling system such as, for example, a cooling coil for supply air, a room cooling coil, a fan coil, an under floor cooling coil, and a ceiling cooling coil.
- the method may further comprise receiving energy of the second temperature from a heat-em itting system , and providing the energy at a level of the energy storage being of the second temperature.
- the heat-em itting system may be chosen from the group comprising an industrial facility or other sources of waste heat, a combined heat and power plant (CHP), solar panels for heating or for combined electrical generation and heating, a heat pump, a bio fuel boiler, an electrical heater, or a fossil fuel boiler. Since free space is created in the energy storage for energy of a second temperature when energy of the first temperature is retrieved, that space may be filled with energy of the second temperature, i.e. with energy having a broader field of application than the energy of the first temperature.
- CHP combined heat and power plant
- the method may further comprise receiving energy of the first temperature from a heat-em itting system , and providing the energy at a level of the energy storage being of the first temperature.
- the method may further comprise retrieving energy of the second temperature from the energy storage for use in a second heat-absorbing system , and thereafter receiving energy of the first temperature from the second heat-absorbing system and providing the energy at a level of the energy storage being of the first temperature.
- the temperature has decreased and the energy is therefore provided at a level in the energy storage where the temperature is lower than the second
- the method may further comprise retrieving energy of the third temperature from the energy storage for use in a heat em itting cooling system , and thereafter receiving energy of the first temperature from the heat em itting cooling system and providing the energy at a level of the energy storage being of the first temperature.
- the cooling system may be chosen from the group consisting of a cooling coil for supply air, room cooling coil, fan coil, under floor cooling coil, and ceiling cooling coil. It may be noted that, when energy of the third temperature is retrieved from the energy storage and then returned at a higher temperature, heat sources such as human beings and lighting systems and other equipment in the building in essence serve as a heat source to the energy storage for possible later use. In this sense a cooling system is a heat- em itting system .
- the method may further comprise receiving energy from an exterior of the arrangement, and providing the energy at a level of the energy storage being of the third temperature.
- energy from ice or snow may be also stored in the energy storage. When ice or snow is melted, this results in energy being of a low temperature, i.e. being in the temperature interval of the third temperature. Thus, that energy may be placed at a level of the energy storage being of the third temperature. This energy of the third temperature can also be received from a district cooling system .
- the first heat-absorbing system m ay be a low tern perature system .
- the first heat-absorbing system may be chosen from the group consisting of a radiator, supply air heating coil, an under floor heating coil, a ceiling heating coil, or a wall heating coil, which all are preferred embodiments.
- the second heat-absorbing system may be a high temperature system .
- the heat-em itting system may be chosen from the group consisting of an industrial facility or other sources of waste heat, a combined heat and power plant (CHP), solar panels for heating or for combined electrical generation and heating, a heat pump, a bio fuel boiler, an electrical heater, or a fossil fuel boiler.
- CHP combined heat and power plant
- the heat em itting cooling system may be chosen from the group consisting of a cooling coil for supply air, room cooling coil, fan coil, under floor cooling coil, and ceiling cooling coil.
- vertical temperature stratification is used in the energy storage in order to reduce the consumption of electrical energy while extracting thermal energy.
- a self-circulating motion of the fluid within the storage is generated due to differences in density between the different layers of fluid in the storage.
- the vertical temperature stratification may be used in order to generate electrical energy while extracting thermal energy. As mentioned above, the motion of the fluid within the storage is generated due to
- an internal combined heating and cooling machine is used in order to increase the energy storage capacity of the energy storage.
- a heating and cooling machine uses mainly energy of an intermediate temperature, freeing up space for storing more energy of a high and a low temperature.
- Figure 1 shows a schematic view of an arrangement for storing thermal energy according to a first embodiment of the invention.
- FIG. 1 illustrates an arrangement 1 for storing thermal energy according to a first embodiment of the invention.
- the arrangement 1 comprises an energy storage 2, which may be a tank or an energy storage such as an underground cavern.
- the energy storage 2 is connected to first, second, and third heat-absorbing systems 3, 4, 5, first and second heat- em itting systems 6, 7 and a cooling system 8 via heat exchangers 9.
- the first heat-absorbing system 3 is a low temperature system such as a heating system for heating of buildings.
- the first heat-absorbing system 3 is connected to a heat exchanger 10.
- Energy of a first temperature Ti is retrieved from the energy storage 2 and is used for heating buildings using the heat exchanger 10. Even though figure 1 shows only one building, it is possible, or even preferable, to connect the arrangement to a plurality of buildings.
- the cooling system 8 is used for cooling buildings via heat exchanger
- Energy of a third temperature T 3 is retrieved from the energy storage 2 and is used for cooling buildings using the heat exchanger 10.
- the third heat-absorbing system 5 is a hot tap water system for buildings. Energy of a first temperature Ti is retrieved from the energy storage 2 and is used for the hot tap water system .
- the second heat-absorbing system 4 is a high temperature system and is, in this example, a district heating system .
- the second heat-absorbing system 4 is charged with energy of temperature T 2 from the energy storage 2.
- the first heat-em itting system 6 is at least one solar collector.
- One or more solar collectors can form a solar heating system .
- the solar collector is charged with energy which is thereafter provided in the energy storage 2 at a level of temperature T 2 orT-i .
- the second heat-emitting system 7 is a district heating system .
- the second heat-em itting system 7 provides the energy storage 2 with energy of temperature T 2 .
- the second heat-em itting system 7 can also provide the energy storage 2 with energy of temperature Ti for example in order to increase the electrical output in a combined heat and power plant or by use of heat from condensing of exhaust flue gases.
- the use of the first heat-em itting system 6, i.e. solar collectors is optional. It is possible to use different applications for connecting the solar collectors to the heat-em itting and/or heat-absorbing system of the building.
- any number and any type of heat-em itting, heat-absorbing and cooling systems can be connected to the arrangement 1 for storing thermal energy.
- energy storage 2 energy of different temperatures is stored.
- the upper parts of the energy storage 2 have higher temperatures than the cooler, lower parts. This is due to the differences in density between fluids, i.e. liquid water, having different temperatures. There are layers having intermediate temperatures in the transition zone there between. In order to use the full potential of the storage, it is important to use the different, available
- energy communication means 1 1 e.g. telescopic pipes, which run from a processing area 12, and which are arranged to retrieve a portion of the energy from the energy storage 2 at a suitable vertical level of the energy storage 2 so as to allow processing of the energy by means of at least one heat exchanger.
- energy communication means 1 1 is, in this embodiment, meant fluid communication means.
- the energy communication means 1 1 are further arranged to return the processed energy to the energy storage 2 at a suitable vertical level of the energy storage 2.
- energy of a first temperature Ti can be retrieved from the energy storage 2, at a level of said energy storage 2 being of said first temperature, for use in the first heat- absorbing system 3 in order to heat up buildings.
- the temperature of the energy has decreased to a third temperature T 3 or a lower part of temperature T-i.
- the energy is then returned to the energy storage 2 at the corresponding temperature level.
- Another example is when energy of the first temperature Ti is retrieved from the energy storage 2 at a level of the energy storage 2 being of the first temperature T-i.
- the energy is then heated via one of the heat exchangers 9 by heat from the solar collector to a second temperature T 2 or upper part of temperature T-i.
- the energy is returned to the energy storage 2 at a corresponding temperature level.
- the first temperature Ti is in the range of 15 ° C to 65 ° C
- the second temperature T 2 is in the range of 50 ° C to 100 ° C
- the third temperature T 3 is in the range of 4 ° C to 25 ° C.
- the energy storage 2 can accordingly be used both for heating, i.e. the energy which is returned to the energy storage 2 has a lower temperature than when it was extracted, and for cooling, i.e. the energy which is returned to the energy storage 2 has a higher temperature than when it was extracted.
- Energy for cooling can be received from an exterior 13 of the arrangement 1 and this energy can be provided at a level of the energy storage 2 being of the third temperature T 3 .
- the energy can, e.g., come from cold water.
- the energy can also be generated by an exterior source 14 connected to other cold sources such as ice, snow, cold air, a lake/river/sea, a chiller, or a district cooling system . If the energy comes from melted ice or snow, the ice or snow is preferably stored at a level above the ground water level such that polluted, melted water may be drained off. The melting may be done using energy of temperature T 3 .
- the energy can also be generated by an exterior cold source 16 such as a second, separate storage for ice or snow, being connected to the energy storage 2.
- Ice or snow in the storage 16 may be created by freezing water from the energy storage 2, whereby the heaviest water, having a temperature of 4°C is located at the bottom of the storage while ice, having a lower density than water, floats at the surface of the storage.
- the energy for cooling and heating is supplied via an internal combined heating and cooling machine 15 such as, e.g., a heat pump.
- the heating and cooling machine 15 retrieves energy from a level of temperature T 2 , T-i, or T 3 from the energy storage 2, while it returns heated energy to a level of temperature T 2 or Ti and cooled energy to a level of temperature T 2 , T-i, or T 3 in the energy storage 2.
- the person skilled in the field of energy realizes that the combined heating and cooling machine can be arranged in many different configurations to achieve high efficiency and flexibility.
- the arrangement 1 does not comprise a level with a temperature T 3 . Instead, the arrangement 1 only comprises temperature levels Ti and T 2 .
- cold water which, e.g., can be drinking water
- of temperature T 3 from an exterior 13 is heated by heat exchanger 9a to a temperature of T-i.
- Heat exchanger 9a has, e.g., been supplied with energy of temperature Ti via energy communication means 1 1 a.
- the water of temperature Ti is heated by heat exchanger 9b to a temperature in a higher part of the range of T-i, alternatively, in a lower part of the range T 2 .
- Heat exchanger 9b has, e.g., been supplied with energy of temperature Ti or T 2 via energy communication means 1 1 b. Thereafter, the water of temperature Ti or T 2 can be used in the hot tap water system for buildings.
- the temperature of the cold water from the exterior 13 can be in the range of 5-15°C.
- the temperature in the lower part of the range of Ti can be in the range of 25-35°C.
- the temperature in the higher part of the range of T-i, alternatively, in the lower part of the range T 2 can be in the range of 55-65°C.
- Warm liquid water has a lower density than cooler water in the range above 4 °C, which causes water of different temperatures to be placed at different vertical levels within the energy storage, i.e. vertical temperature stratification.
- the difference in densities generates a gradient flow during the extraction of heat from the energy storage 2 as warm water, having a lower density, flows upwards through the storage to the heat exchanger where it is cooled down.
- the difference in densities generates a downward flow of colder water. This results in two water pillars of different density causing a gravitational force, which can be used for gradient flow, in order to reduce the consumption of electrical energy.
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Water Supply & Treatment (AREA)
- Central Heating Systems (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
- Building Environments (AREA)
- Supply And Distribution Of Alternating Current (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Air Conditioning Control Device (AREA)
- Other Air-Conditioning Systems (AREA)
- Secondary Cells (AREA)
- Heat-Pump Type And Storage Water Heaters (AREA)
- Nozzles (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
Description
Claims
Priority Applications (17)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
UAA201505313A UA116787C2 (en) | 2012-11-01 | 2013-01-11 | Method for operating an arrangement for storing thermal energy |
KR1020157014568A KR101676589B1 (en) | 2012-11-01 | 2013-11-01 | Method for operating an arrangement for storing thermal energy |
CA2890133A CA2890133C (en) | 2012-11-01 | 2013-11-01 | Method for operating an arrangement for storing thermal energy |
AP2015008425A AP2015008425A0 (en) | 2012-11-01 | 2013-11-01 | Method for operating an arrangement for storing thermal energy |
AU2013338644A AU2013338644B2 (en) | 2012-11-01 | 2013-11-01 | Method for operating an arrangement for storing thermal energy |
CN201380055694.2A CN104813132B (en) | 2012-11-01 | 2013-11-01 | For the method operating the device storing heat energy |
NZ708363A NZ708363A (en) | 2012-11-01 | 2013-11-01 | Method for operating an arrangement for storing thermal energy |
US14/439,760 US9657998B2 (en) | 2012-11-01 | 2013-11-01 | Method for operating an arrangement for storing thermal energy |
BR112015009535A BR112015009535A2 (en) | 2012-11-01 | 2013-11-01 | method for operating an arrangement for storing thermal energy |
RU2015119403/06A RU2578385C1 (en) | 2012-11-01 | 2013-11-01 | Method for operation of heat energy accumulation system |
EP13852022.6A EP2914919B1 (en) | 2012-11-01 | 2013-11-01 | Method for operating an arrangement for storing thermal energy |
JP2015540639A JP5990652B2 (en) | 2012-11-01 | 2013-11-01 | Operation method of fluid storage equipment |
SG11201503208TA SG11201503208TA (en) | 2012-11-01 | 2013-11-01 | Method for operating an arrangement for storing thermal energy |
SA515360346A SA515360346B1 (en) | 2012-11-01 | 2015-04-27 | Method for operating an arrangement for storing thermal energy |
IL238511A IL238511A (en) | 2012-11-01 | 2015-04-28 | Method for operating an arrangement for storing thermal energy |
ZA2015/02900A ZA201502900B (en) | 2012-11-01 | 2015-04-28 | Method for operating an arrangement for storing thermal energy |
HK16102736.7A HK1214859A1 (en) | 2012-11-01 | 2016-03-09 | Method for operating an arrangement for storing thermal energy |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE1251241A SE537267C2 (en) | 2012-11-01 | 2012-11-01 | Method of operating a device for storing thermal energy |
SE1251241-4 | 2012-11-01 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2014070096A1 true WO2014070096A1 (en) | 2014-05-08 |
Family
ID=50627818
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/SE2013/051283 WO2014070098A1 (en) | 2012-11-01 | 2013-11-01 | Thermal energy storage system comprising a combined heating and cooling machine and a method for using the thermal energy storage system |
PCT/SE2013/051281 WO2014070096A1 (en) | 2012-11-01 | 2013-11-01 | Method for operating an arrangement for storing thermal energy |
Family Applications Before (1)
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PCT/SE2013/051283 WO2014070098A1 (en) | 2012-11-01 | 2013-11-01 | Thermal energy storage system comprising a combined heating and cooling machine and a method for using the thermal energy storage system |
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