EP4008969A1 - Dispositif d'équilibrage d'énergie thermique - Google Patents

Dispositif d'équilibrage d'énergie thermique Download PDF

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Publication number
EP4008969A1
EP4008969A1 EP20211790.9A EP20211790A EP4008969A1 EP 4008969 A1 EP4008969 A1 EP 4008969A1 EP 20211790 A EP20211790 A EP 20211790A EP 4008969 A1 EP4008969 A1 EP 4008969A1
Authority
EP
European Patent Office
Prior art keywords
thermal energy
conduit
heat
heat transfer
liquid
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.)
Pending
Application number
EP20211790.9A
Other languages
German (de)
English (en)
Inventor
Per Rosén
Jacob SKOGSTRÖM
Helen Carlström
Bengt Lindoff
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.)
EOn Sverige AB
Original Assignee
EOn Sverige AB
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 EOn Sverige AB filed Critical EOn Sverige AB
Priority to EP20211790.9A priority Critical patent/EP4008969A1/fr
Publication of EP4008969A1 publication Critical patent/EP4008969A1/fr
Pending 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
    • F24D10/00—District heating systems
    • 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
    • F24D2220/00—Components of central heating installations excluding heat sources
    • F24D2220/02—Fluid distribution means
    • F24D2220/0228—Branched distribution conduits
    • 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
    • F24D2220/00—Components of central heating installations excluding heat sources
    • F24D2220/02—Fluid distribution means
    • F24D2220/0271—Valves
    • 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
    • F24D2220/00—Components of central heating installations excluding heat sources
    • F24D2220/04—Sensors
    • F24D2220/046—Pressure sensors
    • 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
    • F24D2220/00—Components of central heating installations excluding heat sources
    • F24D2220/06—Heat exchangers

Definitions

  • the invention relates to a thermal energy balancing device to be connected to a thermal energy circuit comprising a hot and a cold conduit.
  • a common grid used for providing space heating and hot tap water preparation is a gas grid providing a burnable gas, typically a fossil fuel gas.
  • the gas provided by the gas grid is locally burned for providing space heating and hot tap water.
  • An alternative for the gas grid for providing space heating and hot tap water preparation is a district heating grid.
  • the electrical energy of the electrical energy grid may be used for space heating and hot tap water preparation.
  • the electrical energy of the electrical energy grid may be used for space cooling.
  • the electrical energy of the electrical energy grid is further used for driving refrigerators and freezers.
  • a thermal energy balancing device is provided.
  • the thermal energy balancing device is connected to a thermal energy circuit comprising a hot conduit configured to allow heat transfer liquid of a first temperature to flow therethrough, and a cold conduit configured to allow heat transfer liquid of a second temperature to flow therethrough, the second temperature being lower than the first temperature, and wherein the thermal energy balancing device comprises:
  • a thermal energy balancing device which, as a part thereof, uses a hot conduit and a cold conduit forming part of a thermal energy circuit.
  • the two conduits do both have a flow of a heat transfer liquid therethrough, but with an inherent temperature difference.
  • the thermal energy circuit may by way of example be a bidirectional grid, such as a grid known as ectogrid TM which connects buildings with different needs and which balances residual thermal energy flows between the buildings.
  • the two conduits are each, via an intermediate valve arrangement, connected to the liquid primary side of a liquid-to air heat exchanger.
  • the thermal energy balancing device may be set, either into a heat exhale mode or into a heat inhale mode, depending on if there is a need to exhale or inhale heat from or to the thermal energy circuit.
  • a heat exhale mode the heat transfer fluid from the hot conduit is allowed to be transferred via the primary side of the heat changer to the cold conduit during which transfer the temperature of the hotter heat transfer fluid will be lowered before being fed to and intermixed with the heat transfer fluid in the cold conduit. Heat will be exhaled from the heat transfer fluid while passing across the interface between the primary side and the secondary side of the liquid-to-air heat exchanger.
  • the colder heat transfer fluid from the cold conduit is allowed to be transferred via the primary side of the heat changer to the hot conduit during which transfer the temperature of the colder heat transfer fluid will be increased before being fed to and intermixed with the heat transfer fluid in the hot conduit. Heat will be inhaled while passing across the interface between the primary side and the secondary side of the liquid-to-air heat exchanger.
  • the liquid-to-air heat exchanger may, as such be part of an existing infrastructure, such as an existing cooling tower(s) or a fan convector which is used for heating and/or cooling.
  • the fluid flow between the hot and cold conduits is controlled by a valve arrangement.
  • the valve arrangement may have a design with a plurality of valves which, depending on their mutual setting, allow the flow of heat transfer fluid to and from the two conduits to be controlled.
  • the valves may be of the on/off type.
  • the liquid-to-air heat exchanger is preferably a water-to-air heat exchanger. It is however to be understood that other liquids than water may be used.
  • the invention provides a solution where a double functionality may be achieved which offers not only the ability to exhale heat but also to inhale heat depending on e.g. season or different local clients need.
  • the liquid phase primary side of the liquid-to-air heat exchanger may comprise an inlet and an outlet, and the valve arrangement may be configured to direct a flow of heat transfer liquid from the inlet to the outlet when the valve arrangement is set into the heat exhale mode and when the valve arrangement is set into the heat inhale mode. Accordingly, one and the same inlet is used, no matter mode. Only the conduits from which the liquid is fed from and returned to are altered, and this is made by controlling the valves of the valve arrangement.
  • the thermal energy balancing device may further comprise a fan configured to produce an air flow at the gas phase secondary side of the liquid-to-air heat exchanger.
  • the fan may be used to generate a turbulent air flow across the interface between the gas phase secondary side and the liquid phase primary side of the heat exchanger. Thereby heat transfer between the primary and secondary sides may be facilitated, no matter if it is to promote a heat exhaling effect or a heat inhaling effect.
  • the fan may be configured to provide an air flow counter to the flow direction on the primary liquid side.
  • the fan may be configured to provide an air flow counter to the flow direction on the primary liquid side no matter if the thermal energy balancing device is set into the heat exhale mode or into the heat inhale mode. Thus, there is no need to actively control the fan separately.
  • the pressure difference determining device is configured to sense local pressure in the hot conduit and in the cold conduit respectively and determine a difference between the two pressures.
  • the pressure difference determining device may also be configured to determine if the determined local pressure difference is acceptable in view of a predetermined set value.
  • the local pressure in the two conduits will vary depending on where in the thermal energy circuit the pressure is measured.
  • the local pressure differences are the result of different client's activity and needs. Examples of different clients are different households, different offices or different stores, which all have different needs which also vary over time and across a day.
  • the regulator may be provided as a pump which is arranged in a position between the hot conduit and the cold conduit.
  • the regulator may be arranged either in a position before the inlet to the primary side of the liquid-to-air heat exchanger, or after the outlet from the primary side of the liquid-to-air heat exchanger.
  • the purpose of the regulator is to promote the flow of liquid to the heat exchanger in the event the determined local pressure difference between the hot conduit and the cold conduit should be determined to be below a set value. In the event the determined local pressure difference instead should be determined to be above the set value, the regulator may instead be set into a passive mode and instead act as an open valve allowing a flow of heat transfer liquid to pass therethrough.
  • the thermal energy balancing device may further comprise a controller connected to one or more of the pressure difference determining device, the regulator and the valve arrangement.
  • Fig. 1 discloses one example of a district thermal energy distribution system 1 according to prior art in which the invention may be applicable.
  • the district thermal energy distribution system 1 comprises a thermal energy circuit 10 and a plurality of buildings 5.
  • the plurality of buildings 5 are thermally coupled to the thermal energy circuit 10.
  • the thermal energy circuit 10 is arranged to circulate and store thermal energy in heat transfer liquid flowing through the thermal energy circuit 10.
  • the heat transfer liquid comprises water.
  • other heat transfer liquid may be used.
  • Some non-limiting examples are ammonia, oils, alcohols and anti-freezing liquids such as glycol.
  • the heat transfer liquid may also comprise a mixture of two or more of the heat transfer liquids mentioned above.
  • the thermal energy circuit 10 comprises two conduits 12, 14 for allowing flow of heat transfer liquid therethrough.
  • the temperature of the heat transfer liquid of the two conduits 12, 14 is set to be different.
  • a hot conduit 12 in the thermal energy circuit 10 is configured to allow heat transfer liquid of a first temperature to flow therethrough.
  • a cold conduit 14 in the thermal energy circuit 10 is configured to allow heat transfer liquid of a second temperature to flow therethrough. The second temperature is lower than the first temperature.
  • a suitable normal operation hot temperature range for heat transfer liquid in the hot conduit 12 is between 5 and 45°C and a suitable normal operation cold temperature range for heat transfer liquid in the cold conduit 14 is between 0 and 40° C.
  • a suitable temperature difference between the first and second temperatures is in the range of 5-16°C, preferably in the range of 7-12°C, more preferably 8-10°C.
  • the system is set to operate with a sliding temperature difference which varies depending on the climate.
  • the sliding temperature difference is fixed. Hence, the temperature difference is always set to momentarily slide with a fixed temperature difference.
  • the hot conduit 12 and the cool conduit 14 are separate.
  • the hot conduit 12 and the cool conduit 14 may be arranged in parallel.
  • the hot conduit 12 and the cool conduit 14 may be arranged as closed loops of piping.
  • the hot conduit 12 and the cool conduit 14 are fluidly interconnected at the buildings 5 for allowing of thermal energy transfer to and from the buildings 5.
  • the two conduits 12, 14 of the thermal energy circuit 10 are dimensioned for pressures up to 1 MPa (10 bar). According to other embodiments the two conduits 12, 14 of the thermal energy circuit 10 may be dimensioned for pressures up to 0.6 MPa (6 bar) or for pressures up to 1.6 MPa (16 bar).
  • Each building 5 comprise at least one of one or more local thermal energy consumer assemblies 20 and one or more local thermal energy generator assemblies 30. Hence, each building comprises at least one local thermal energy consumer assembly 20 or at least one local thermal energy generator assembly 30. One specific building 5 may comprise more than one local thermal energy consumer assembly 20. One specific building 5 may comprise more than one local thermal energy generator assembly 30. One specific building 5 may comprise both a local thermal energy consumer assembly 20 and a local thermal energy generator assembly 30.
  • the local thermal energy consumer assembly 20 is acting as a thermal sink. Hence, the local thermal energy consumer assembly 20 is arranged to remove thermal energy from the thermal energy circuit 10. Or in other words, the local thermal energy consumer assembly 20 is arranged to transfer thermal energy from heat transfer liquid of the thermal energy circuit 10 to surroundings of the local thermal energy consumer assembly 20. This is achieved by transferring thermal energy from heat transfer liquid taken from the hot conduit 12 to surroundings of the local thermal energy consumer assembly 20, such that heat transfer liquid that is returned to the cold conduit 14 has a temperature lower than the first temperature and preferably a temperature equal to the second temperature.
  • the local thermal energy generator assembly 30 is acting as a thermal source. Hence, the local thermal energy generator assembly 30 is arranged to deposit thermal energy to the thermal energy circuit 10. Or in other words, the local thermal energy generator assembly 30 is arranged to transfer thermal energy from its surroundings to heat transfer liquid of the thermal energy circuit 10. This is achieved by transferring thermal energy from surroundings of the local thermal energy generator assembly 30 to heat transfer liquid taken from the cold conduit 12, such that the heat transfer liquid that is returned to the hot conduit 12 has a temperature higher than the second temperature and preferably a temperature equal to the first temperature.
  • the one or more local thermal energy consumer assemblies 20 may be installed in the buildings 5 as local heaters for different heating needs.
  • a local heater may be arranged to deliver space heating or hot tap hot water preparation.
  • the local heater may deliver pool heating or ice- and snow purging.
  • the local thermal energy consumer assembly 20 is arranged for deriving heat from heat transfer liquid of the hot conduit 12 and creates a cooled heat transfer liquid flow into the cold conduit 14.
  • the local thermal energy consumer assembly 20 fluidly interconnects the hot and cool conduits 12, 14 such that hot heat transfer liquid can flow from the hot conduit 12 through the local thermal energy consumer assembly 20 and then into the cool conduit 14 after thermal energy in the heat transfer liquid has been consumed by the local thermal energy consumer assembly 20.
  • the local thermal energy consumer assembly 20 operates to draw thermal energy from the hot conduit 12 to heat the building 5 and then deposits the cooled heat transfer liquid into the cool conduit 14.
  • the one or more local thermal energy generator assemblies 30 may be installed in different buildings 5 as local coolers for different cooling needs.
  • a local cooler may be arranged to deliver space cooling or cooling for freezers and refrigerators.
  • the local cooler may deliver cooling for ice rinks and ski centers or ice- and snow making.
  • the local thermal energy generator assembly 30 is deriving cooling from heat transfer liquid of the cold conduit 14 and creates a heated heat transfer liquid flow into the hot conduit 12.
  • the local thermal energy generator assembly 30 fluidly interconnects the cold and hot conduits 14, 12 such that cold heat transfer liquid can flow from the cold conduit 14 through the local thermal energy generator assembly 30 and then into the hot conduit 12 after thermal energy has been generated into the heat transfer liquid by the local thermal energy generator assembly 30.
  • the local thermal energy generator assembly 30 operates to extract heat from the building 5 to cool the building 5 and deposits that extracted heat into the hot conduit 12.
  • the local thermal energy consumer assembly 20 is selectively connected to the hot conduit 12 via a non-disclosed valve and a non-disclosed pump. Upon selecting the connection of the local thermal energy consumer assembly 20 to the hot conduit 12 to be via the valve, heat transfer liquid from the hot conduit 12 is allowed to flow into the local thermal energy consumer assembly 20. Upon selecting the connection of the local thermal energy consumer assembly 20 to the hot conduit 12 to be via the pump, heat transfer liquid from the hot conduit 12 is pumped into the local thermal energy consumer assembly 20.
  • the local thermal energy generator assembly 30 is selectively connected to the cold conduit 14 via a non-disclosed valve and a non-disclosed pump. Upon selecting the connection of the local thermal energy generator assembly 30 to the cold conduit 14 to be via the valve, heat transfer liquid from the cold conduit 14 is allowed to flow into the local thermal energy generator assembly 30. Upon selecting the connection of the local thermal energy generator assembly 30 to the cold conduit 14 to be via the pump, heat transfer liquid from the cold conduit 14 is pumped into the local thermal energy generator assembly 30.
  • the demand to inhale or exhale thermal energy using the local thermal energy consumer assemblies 20 and the local thermal energy generator assemblies 30 is made at a defined temperature difference.
  • a temperature difference in the range of 5-16°C, preferably in the range of 7-12°C, more preferably 8-10°C corresponds to optimal flows through the system.
  • the local pressure difference between the hot and cold conduits 12, 14 may vary along the thermal energy circuit 10. Especially, the local pressure difference between the hot and cold conduits 12, 14 may vary from positive to negative pressure difference seen from one of the hot and cold conduits 12, 14. Hence, sometimes a specific local thermal energy consumer/generator assembly 20, 30 may need to pump heat transfer liquid there through and sometimes the specific local thermal energy consumer/generator assembly 20, 20 may need to let heat transfer liquid flow through there through. Accordingly, it will be possible to let all the pumping within the system 1 to take place in the local thermal energy consumer/generator assemblies 20, 30. Due to the limited flows and pressures needed small frequency-controlled circulation pumps may be used.
  • the basic idea of the district thermal energy distribution system 1 as described above and which is illustrated in Fig. 1 is based on the insight by the applicant that modern day cities by them self provide thermal energy that may be reused within the city.
  • the reused thermal energy may be picked up by the district thermal energy distribution system 1 and be used for e.g. space heating or hot tap water preparation.
  • increasing demand for space cooling will also be handled within the district thermal energy distribution system 1.
  • buildings 5 within the city are interconnected and may in an easy and simple way redistribute low temperature waste energy for different local demands.
  • the system 1 may further comprise a thermal server plant 40.
  • the thermal server plant 40 functions as an external thermal source and/or thermal sink.
  • the function of the thermal server plant 40 is to maintain the temperature difference between the hot and cold conduits 12, 14 of the thermal energy circuit 10.
  • the function of the thermal server plant 40 is further to regulate the pressure difference between the hot and cold conduits 12, 14 of the thermal energy circuit 10.
  • FIG. 2 discloses one embodiment of a thermal energy balancing device 400 which may form part of the prior art system described above with reference to Fig. 1 .
  • the thermal energy balancing device 400 comprises a valve arrangement 500 and a liquid-to-air heat exchanger 600 which both will be described below.
  • the thermal energy balancing device 400 is configured to be connected to a thermal energy circuit 100 which comprises a hot conduit 120 and a cold conduit 140.
  • the overall design and function of the thermal energy circuit 100 is the same as that described above with reference to Fig. 1 .
  • the hot conduit 120 is like in the prior art system configured to allow heat transfer liquid of a first temperature to flow therethrough.
  • the cold conduit 140 is configured to allow heat transfer liquid of a second temperature to flow therethrough. The second temperature is lower than the first temperature.
  • the flow in the hot conduit 120 and the cold conduit 140 may be bidirectional.
  • the heat exchanger 600 is preferably a water-to-air heat exchanger. It is however to be understood that other liquids than water may be used.
  • the heat exchanger 600 may by way of example be a fan convector for heating and cooling which as such is well known to the skilled person.
  • the heat exchanger 600 may be part of an existing infrastructure, such as an existing cooling or heating machine in a building.
  • the heat exchanger 600 comprises a liquid phase primary side 610 and a gas phase secondary side 620.
  • the liquid phase primary side 610 comprises one inlet 611 and one outlet 612 allowing a flow of heat transfer liquid to pass across the liquid phase primary side 610.
  • the inlet 611 and the outlet 612 are connected to the valve arrangement 500.
  • the valve arrangement 500 is arranged in fluid communication with the hot conduit 120 and with the cold conduit 140.
  • connection of the valve arrangement 500 to the hot and cold conduits 120, 140 may be made via service valves 512a, 512b.
  • the service valves 512a, 512b may be used for connecting and disconnecting the valve arrangement 500 and thereby the heat exchanger 600 to/from the thermal energy circuit 100.
  • the gas phase secondary side 620 of the heat exchanger 600 may comprise a fan 630.
  • the fan 630 is configured to produce an air flow at the gas phase secondary side 620 of the heat exchanger 600.
  • the fan 630 will be further described below.
  • the valve arrangement 500 comprises four valves 510 that are interconnected in series to form a closed loop.
  • Each valve 510 is configured as a valve of the on/off-type. It is however to be understood that other valve types are equally applicable.
  • the closed loop comprises four connections points A, B, C, D, with one connection point between two adjacent valves 510.
  • the hot conduit 120 is arranged in fluid communication with the valve arrangement 500 via a conduit connecting to the first connection point A.
  • the inlet 611 of the heat exchanger 600 is arranged in fluid communication with the valve arrangement 500 via a conduit connecting to the second connection point B.
  • the cold conduit 140 is arranged in fluid communication with the valve arrangement 500 via a conduit connecting to the third connection point C.
  • the outlet 612 of the heat exchanger 600 is arranged in fluid communication with the valve arrangement 500 via a conduit connecting to the fourth connection point D.
  • the valve arrangement 500 may be controlled by a controller 800.
  • the controller 800 is connected to the valve arrangement 500 to selectively allow a setting of the valves 510 to thereby control the flow through the valve arrangement 500 depending on which operation mode of the thermal energy balancing device is desired, i.e. if a heat exhale mode is desired or if a heat inhale mode is desired.
  • the two modes of the thermal energy balancing device 400 will be exemplified with reference to Figs. 3A and 3B .
  • the two modes differ in how the valves 510 are set and hence how the flow of heat transfer liquid is allowed to flow.
  • a closed valve is illustrated by a solid black valve icon, whereas an open valve is illustrated by a solid white valve icon.
  • Figs. 3A and 3B have been simplified by removing some components.
  • Fig. 3B the second mode, being a heat inhale mode is illustrated.
  • a flow of cold heat transfer fluid is allowed from the cold conduit 140, through the open valve 510 between connection points C-B, into the heat exchanger 610 via its inlet 611, across the liquid phase primary side 610 of the heat exchanger 600, out of the heat exchanger 600 via its outlet 612, through the open valve 510 between the connection points D-A and into the hot conduit 120.
  • the temperature of the heat transfer fluid will be increased by inhaling heat.
  • This specific operation mode may by way of example be used during the colder period of a year in areas which have a hot climate during the major part of the year to provide heating of homes, offices, tap water etc.
  • the inhale mode is typically run when clients connected to the thermal energy circuit 100 want a heating effect.
  • the thermal energy balancing device 400 may further comprise a fan 630.
  • the fan 630 is arranged on the gas phase secondary side 620 of the heat exchanger 600.
  • the fan 630 is configured to generate a turbulent air flow in and around the gas phase secondary side 620 to thereby enhance heat transfer between the liquid phase primary side 610 and the gas phase secondary side 620.
  • the fan 630 is operable no matter if it is to promote a heat exhaling or a heat inhaling effect, i.e. no matter if the thermal energy balancing device 400 is set to an exhale mode or an inhale mode.
  • the fan 630 is configured to provide an air flow counter to the flow direction on the liquid phase primary side 610 of the heat exchanger 600.
  • the fan 630 may be configured to provide an air flow counter to the flow direction on the liquid phase primary side 610 no matter if the thermal energy balancing device 400 is set into the heat exhale mode or into the heat inhale mode.
  • the thermal energy balancing device 400 may further comprise a regulator 700 and a pressure difference determining device 710.
  • the overall design of the thermal energy balancing device 400 in Fig. 4 is the same as previously discussed in view of Figs. 2 , 3A and 3B .
  • the pressure difference determining device 710 is configured to sense local pressure in the hot conduit 120 and the cold conduit 140 respectively and determine a difference between the two pressures.
  • the regulator 700 is configured to, based on the determined local pressure difference, regulate the flow of heat transfer liquid between the hot and cold conduits 120, 140.
  • the regulator 700 is disclosed in Fig. 2 as being arranged in a position between the hot and cold conduits 120, 140.
  • the regulator 700 is disclosed as being arranged between the valve arrangement 500 and liquid phase primary side 610 of the heat exchanger 600.
  • the regulator 700 may be a small frequency controlled circulation pump.
  • the regulator 700 may be arranged either in a position before the inlet 611 to the primary side of the heat exchanger 600, or after the outlet 612 from the primary side of the heat exchanger 600.
  • the purpose of the regulator 700 is to facilitate the flow of heat transfer liquid to the heat exchanger 600 in the event the determined pressure difference between the hot conduit 120 and the cold conduit 140 should be below a predetermined set value.
  • the regulator 700 may be set into a passive mode and act as an open valve allowing a flow of heat transfer fluid to pass therethrough. Should the determined local pressure difference instead be determined to be below the set value, the regulator 700 may be set into an active mode and pump the heat transfer liquid to thereby increase the pressure of the heat transfer fluid as seen in a position downstream the regulator 700.
  • the regulator 700 and the pressure determining device 710 may be connected to the controller 800.
  • the controller 800 may be the same as is used to control the valve arrangement 500.
  • the pressure difference determining device 710 may be embodied in many different ways as will be given below.
  • the pressure difference determining device 710 may, as is illustrated in Fig. 4 , be integrated in the regulator 700.
  • One example of such integrated regulator 700 and pressure difference determining device 710 is a differential pressure regulator.
  • the regulator 700 If the detected pressure in a position adjacent an inlet end 700a of the regulator 700 should be determined to be lower than a predetermined set value, the regulator 700 is activated. Thereby, the pressure at the outlet end 700b of the regulator 700, and hence the pressure of the heat transfer liquid supplied from a first conduit to a second fluid in the thermal energy circuit 100 will be increased. Thereby a detected local pressure difference between the hot conduit 120 and the cold conduit 140 may be adjusted.
  • the first conduit will be the hot conduit 120 and the second conduit will be the cold conduit 140.
  • the first conduit will be the cold conduit 140 and the second conduit will be the hot conduit 120.
  • the regulator 700 will instead be set in a passive mode and allow a bypass of heat transfer liquid.
  • the pressure difference determining device 710 may be arranged as an independent device separate from the regulator 700.
  • the pressure difference determining device 710 comprises a hot conduit pressure determining unit 710a which is connected to the hot conduit 120 for measuring the hot conduit local pressure, p h .
  • the pressure difference determining device 710 comprises a cold conduit pressure determining unit 710b which is connected to the cold conduit 140 for measuring the cold conduit local pressure, p c .
  • the pressure at the outlet end 700b of the regulator 700, and hence the pressure of the heat transfer liquid supplied from a first conduit to a second fluid will be increased.
  • the first conduit will be the hot conduit 120 and the second conduit will be the cold conduit 140.
  • the first conduit will be the cold conduit 140 and the second conduit will be the hot conduit 120.
  • a detected local pressure difference between the hot conduit 120 and the cold conduit 140 may be adjusted to be within a pre-determined set pressure difference.
  • the regulator 700 will instead be set in a passive mode and allow a bypass of heat transfer liquid.
  • the valve arrangement 500 has been described as comprising four valves 510 which are interconnected in a closed loop with one connection point A to the hot conduit 120, one connection point C to the cold conduit 140, one connection point B to the inlet 611 of the liquid phase primary side 610 of the heat exchanger 600 and one connection point D to the outlet 612 of the liquid phase primary side 610 of the heat exchanger 600.
  • the skilled person realizes that the number of valves 510 and their mutual interconnection and their connection with the heat exchanger 600 and the hot and cold conduits 120, 140 may be varied with remained function.
  • the regulator has been disclosed as being arranged between the valve arrangement 500 and the liquid phase primary side 610 of the heat exchanger. The skilled person understands that other positions are possible.

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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)
  • Steam Or Hot-Water Central Heating Systems (AREA)
EP20211790.9A 2020-12-04 2020-12-04 Dispositif d'équilibrage d'énergie thermique Pending EP4008969A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP20211790.9A EP4008969A1 (fr) 2020-12-04 2020-12-04 Dispositif d'équilibrage d'énergie thermique

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20211790.9A EP4008969A1 (fr) 2020-12-04 2020-12-04 Dispositif d'équilibrage d'énergie thermique

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EP4008969A1 true EP4008969A1 (fr) 2022-06-08

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014137968A2 (fr) * 2013-03-04 2014-09-12 Johnson Controls Technology Company Système modulaire de chauffage et de refroidissement à base de liquide
EP2837895A2 (fr) * 2009-06-16 2015-02-18 Dec Design Mechanical Consultants Ltd. Système de partage d'énergie urbain
EP3165831A1 (fr) * 2015-11-04 2017-05-10 E.ON Sverige AB Système de distribution d'énergie thermique de district
EP3184914A1 (fr) * 2015-12-21 2017-06-28 E.ON Sverige AB Installation de serveur thermique et procédé pour le commander

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2837895A2 (fr) * 2009-06-16 2015-02-18 Dec Design Mechanical Consultants Ltd. Système de partage d'énergie urbain
WO2014137968A2 (fr) * 2013-03-04 2014-09-12 Johnson Controls Technology Company Système modulaire de chauffage et de refroidissement à base de liquide
EP3165831A1 (fr) * 2015-11-04 2017-05-10 E.ON Sverige AB Système de distribution d'énergie thermique de district
EP3184914A1 (fr) * 2015-12-21 2017-06-28 E.ON Sverige AB Installation de serveur thermique et procédé pour le commander

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