US20180245800A1 - Method and apparatus for utilization of hot water plant waste heat recovery by incorporated high temperature water source heat pump - Google Patents
Method and apparatus for utilization of hot water plant waste heat recovery by incorporated high temperature water source heat pump Download PDFInfo
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- US20180245800A1 US20180245800A1 US15/757,462 US201615757462A US2018245800A1 US 20180245800 A1 US20180245800 A1 US 20180245800A1 US 201615757462 A US201615757462 A US 201615757462A US 2018245800 A1 US2018245800 A1 US 2018245800A1
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- heat
- transfer medium
- distribution network
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- heat transfer
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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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B1/00—Methods of steam generation characterised by form of heating method
- F22B1/02—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers
- F22B1/16—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being hot liquid or hot vapour, e.g. waste liquid, waste vapour
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B1/00—Methods of steam generation characterised by form of heating method
- F22B1/02—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers
- F22B1/18—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being a hot gas, e.g. waste gas such as exhaust gas of internal-combustion engines
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B5/00—Steam boilers of drum type, i.e. without internal furnace or fire tubes, the boiler body being contacted externally by flue gas
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D17/00—Domestic hot-water supply systems
- F24D17/0036—Domestic hot-water supply systems with combination of different kinds of heating means
-
- 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
- F24D7/00—Central heating systems employing heat-transfer fluids not covered by groups F24D1/00 - F24D5/00, e.g. oil, salt or gas
-
- 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
- F24H8/00—Fluid heaters characterised by means for extracting latent heat from flue gases by means of condensation
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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
- F24D2200/04—Gas or oil fired boiler
-
- 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
-
- 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
- F24D2200/13—Heat from a district heating network
-
- 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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- 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
- Y02B10/20—Solar thermal
-
- 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
- Y02B10/70—Hybrid systems, e.g. uninterruptible or back-up power supplies integrating renewable energies
-
- 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
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
-
- 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
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/52—Heat recovery pumps, i.e. heat pump based systems or units able to transfer the thermal energy from one area of the premises or part of the facilities to a different one, improving the overall efficiency
-
- 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
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/14—Combined heat and power generation [CHP]
Definitions
- the object of this patent application relates to the methods and apparatus for gas fired hot water plant waste heat recovery with incorporated high temperature water source heat pump for waste heat source utilization.
- Heat pumps that have been used in prior art to enhance the heating power of hot water and power plants for the supply of industrial and district heating networks by utilizing the waste heat recovery have been deployed in a various designs.
- the waste heat of flue gas is used by incorporated air to air type heat pump to improve the heating performance of gas fired power plant, wherein the heat generated by integrated heat pump is fed to the air to water type heat exchanger being connected with supply pipeline of heat distribution circuit.
- the main disadvantage of represented approach is relatively low thermal performance compared to the proposed solution with water source type heat pump as explained hereinafter.
- This invention relates to the hot water plants for the supply of industrial and district heating networks, wherein at least one incorporated water source high temperature heat pump is used to upgrade a low temperature heat from at least one waste heat source to the higher temperature heat output, which can be afterwards used directly or indirectly by at least one heat consumer for space or process heating, preferably in the scope of district heating.
- the heat pump according to the invention is used to heat up and rise the temperature of a primary heat transfer medium in a supply line of an open loop heating network, and/or in a return line of a closed loop heating circuit, wherein a design (i.e. operational) temperature of the primary heat transfer medium in a forward line of the heat distribution network is substantially higher than 45° C., at least when operating at normal operating conditions.
- operating conditions of the heat distribution network are provided after commissioning and warm-up process where at least basic design temperature of the heat distribution network is successfully achieved and maintained (i.e. established) over at least a short period of time, hence at least one first heat releasing unit is turned on and operating by firing the fuel in the fuel burning (i.e. combustion) process in the scope of substantially a continuous operation, and at least one second heat releasing unit (i.e. heat pump) is turned on and operating for liquid-vapor phase change thermodynamic cycle process and waste heat source utilization.
- At least one furnace with at least one incorporated boiler in the scope of said hot water plant and at least one water source high temperature heat pump are used to provide a first and a second heat source respectively in the scope of the heat distribution network, where individual unit shall substantially operate in the range between its minimum and maximum rated (i.e. full load) operating power, preferably at normal rated power for highest power efficiency developed in continuous operation.
- FIG. 1 shows a schematic representation of a hot water plant preferential embodiment with incorporated water source high temperature heat pump (HP) having a condenser unit, an evaporator unit, and a compressor with adopted lubrication oil cooling system (CS) for heat pump principle utilization, where following items are further shown and marked: first heat releasing unit of depicted hot water plant (HWP), heat distribution circuit and exhaust system comprising a network of pipes (PI-P 13 ), valves (VI-V 2 ) and pumps (PU 1 -PU 4 ) which interconnects the heat consumer (HC) with stated heat sources, heat exchanger (HE), hatch (HI), fan (FI), ambient (O) and control temperature sensors (TI-T 12 ).
- HP high temperature heat pump
- CS lubrication oil cooling system
- the system comprises a furnace with incorporated boiler in the scope of first heat releasing unit of hot water plant (HWP), which preferably runs on a gas fuel, such as natural gas, liquefied petroleum gas, landfill gas, wood gas, biogas or coal for example.
- HWP hot water plant
- first heat releasing unit is used for heat generation when powered, a significant amount of heat is released by the flue gas, wherein the heat is either used by heat consumer (HC) rather than discharged and dissipated to the ambient (O) through the exhaust pipe (P 12 ) (i.e. chimney).
- the first heat source for heat consumer is preferably represented by boiler in the scope of the hot water plant (HWP), having an inlet and outlet aperture, whereby plurality of waste heat sources arise in the scope of the hot water plant (HWP) and incorporated heat pump (HP), at least when the hot water plant (HWP) and heat pump (HP) are turned on and powered, preferably at optimum efficiency or full load regime.
- waste heat source is represented by the stream of high temperature flue gas in exhaust system, which is a product of the combustion process within the hot water plant (HWP).
- HWP hot water plant
- CS lubrication oil cooling systems
- the hot water plant (HWP) boilers inflow (i.e. inlet port) and outflow (i.e. outlet port) apertures are operably coupled to the closed loop heating circuit comprising a network of pipes (PI-PII) that operably interconnects the heat consumer (HC) and heat sources in the scope of hot water plant (HWP) with incorporated water source high temperature heat pump (HP).
- the heat distribution network further comprises a primary heat transfer medium and automated regulation means comprising a control unit (i.e.
- valves VI-V 2
- pumps PU 1 -PU 4
- HC heat consumer
- the waste heat of flue gas is eventually utilized by incorporated heat exchanger (HE) which collects the high temperature waste heat of flue gas in exhaust system, wherein the exhaust heat exchanger (HE) is capable to collect and transfer the heat of said waste heat source due to the significant temperature difference between the temperature of flue gas in exhaust system and the temperature of primary heat transfer medium in incorporated heat exchanger (HE).
- HE incorporated heat exchanger
- the heat of the flue gas is not only collected, but also upgraded by incorporated air source heat pump, wherein it is essential to notice, that according to stated solution from prior art, the waste heat collected by heat pipe is used to upgrade the heat of flue gas by air to air heat pump principle utilization, hence the heat of high temperature flue gas is transferred to the primary heat transfer medium in a chamber of incorporated air to water type heat exchanger.
- the exhaust system preferably comprises at least one condensing type heat exchanger (HE) to collect the heat of flue gas, wherein collected heat is transferred to the evaporator unit of water source high temperature heat pump (HP) by circulation of secondary heat transfer medium with aim to upgrade and enhance the heating power of the hot water plant (HWP). While the temperature of flue gas in exhaust system is rapidly reduced (preferably below 45° C.), the exhaust system may further comprise a suction fan (FI) for removal of flue gas from exhaust system.
- HE condensing type heat exchanger
- HP high temperature heat pump
- FI suction fan
- depicted embodiment comprises the lubrication oil cooling system (CS) in form of a heat exchanger, operably coupled to the evaporator unit with aim to collect the waste heat of heat pump (HP) compressors lubrication oil, which is afterwards upgraded by a liquid-vapor phase change thermodynamic cycle utilization process and transferred to the heat distribution network by incorporated water source high temperature heat pump (HP).
- CS lubrication oil cooling system
- HP waste heat of heat pump
- the apparatus comprises at least one motorized valve, preferably hatch (HI) for flue gas stream manipulation (i.e. regulation), regulated by main control unit
- HI high temperature heat pump
- HP heat pump
- the heat exchanger (HE) and heat pump (HP) shall be implemented in a multistage or cascade principle approach comprising a plurality of heat pumps (HP) and/or heat exchangers (HE) in parallel and/or serial connection to reach the optimized total waste heat source utilization.
- water source high temperature heat pump (HP) utilization uses at least one low temperature waste heat source for vaporization of working medium of incorporated heat pump (HP), wherein the condenser unit outlet is preferably fed (i.e. operably coupled) to the heat distribution circuit return line, more precisely to the inflow of the boiler in the scope of closed loop heat distribution system.
- the invention relates to a method of the heat pump (HP) integration process and to a method of hot water plant (HWP) waste heat source utilization.
- HP heat pump
- HWP hot water plant
- the water source high temperature heat pump (HP) having a condenser and evaporator unit with working medium for liquid-vapor phase change thermodynamic cycle utilization and at least one heat exchanger (HE), wherein: A) the high temperature heat pump (HP) condenser unit is operably coupled to the heat distribution return line in a closed loop heat distribution system or to the supply line in an open loop heat distribution system; B) the high temperature heat pump (HP) evaporator unit is operably coupled with at least one heat exchanger (HE) in a closed loop piping system with secondary heat transfer medium involved. 2.
- a fuel combustion process where preferably at least one furnace is used for burning the fuel in the scope of the hot water plant (HWP) with aim to provide a first heat releasing unit for heating at least one heat transfer medium in the boiler, wherein at least one waste heat source arise when said first heat releasing unit is turned on and operating by firing the fuel in the combustion process. Accordingly, plurality of boilers and/or furnaces in parallel or serial connection shall be used to provide an advanced embodiment of the first heat releasing unit.
- a waste heat recovery process which comprises a process of collecting the waste heat, wherein at least one waste heat recovery unit (i.e.
- HE heat exchanger
- HP integrated heat pump
- a liquid-vapor phase change thermodynamic cycle utilization process wherein at least one water source high temperature heat pump (HP) shall be used to provide a second heat releasing unit for heating at least one heat transfer medium in said heat distribution network, at least when said heat pump (HP) is turned on and operating. Accordingly, plurality of heat pumps (HP) units in parallel or serial connection is used to provide an advanced edition of the second heat releasing unit.
- HP water source high temperature heat pump
- At least one heat transfer medium in at least one return line of said closed loop heat distribution network is reheated by the heat pump (HP) principle utilization, at least when a design temperature of the heat distribution network is reached and said hot water plant (HWP) and heat pump (HP) are operating at full load; and/or
- At least one line of primary heat transfer medium in at least one supply line of said open loop heat distribution network is preheated by the heat pump (HP) principle utilization, at least when a design temperature of the heat distribution network is reached and said hot water plant (HWP) and heat pump (HP) are operating at full load.
- combustion process is substantially a continuous process
- at least one furnace with incorporated boiler in the scope of hot water plant normally operates in the range between its minimum and maximum rated operating power, preferably at normal rated power in continuous operation.
- the liquid-vapor phase change thermodynamic cycle utilization process is substantially a continuous process, wherein said heat pump (HP) operates in the range between its minimum and maximum rated operating power, preferably at normal rated power in continuous operation.
- the fuel combustion process in an advanced hot water plant (HWP) embodiment shall be provided by plurality of boilers and/or furnace units in the scope of the first heat releasing unit, wherein the heat in the scope of the first heat releasing unit is transferred in serial and/or in parallel connection and similarly, the liquid-vapor phase change thermodynamic cycle utilization process shall be utilized by plurality of heat pump (HP) units to provide a second heat releasing unit of the advanced hot power plant (HWP).
- HP heat pump
- the thermal energy balance adjustment is executed by adapting the power of said heat pump (HP) and/or by adapting the power of said furnace in the scope of first heat releasing unit and/or by adapting the mass flow of the primary heat transfer medium through the heat distribution system.
- HP heat pump
- the mass flow of the primary heat transfer medium in said closed loop heat distribution circuit is adapted by changing the flow velocity in said heat distribution circuit and/or the mass flow of the secondary heat transfer medium in said closed loop circuit is adapted by changing the flow velocity in said closed loop circuit, wherein the velocity of heat transfer medium in heat distribution network is adapted by switching (i.e.
- the mass flow of the primary heat transfer medium in depicted heat distribution circuit is alternatively adapted by stream flow regulation, wherein at least a portion of the primary heat transfer medium stream in the return line of said heat distribution circuit is redirected to the return line of said heat distribution circuit to provide a heat pump (HP) bypass connection, and/or wherein at least a portion of the primary heat transfer medium stream from said heat pump (HP) is redirected to a forward line of the heat distribution circuit to provide a hot water plant (HWP) bypass connection with aim to balance the power generated by first and second heat releasing units.
- HP heat pump
- HWP hot water plant
- the mass flow of the secondary heat transfer medium in said closed loop circuit for waste heat source utilization is adapted by stream flow regulation, wherein at least a portion of the secondary heat transfer medium stream is redirected in said closed loop circuit to provide a bypass connection for at least one waste heat recovery unit.
- the mass flow regulation of the primary heat transfer medium and/or the mass flow regulation of the secondary heat transfer medium for thermal energy balance adjustment is determined, controlled and executed by at least one control unit (i.e. electronic controller), wherein the position and/or the state (i.e. open/closed or on/off regulation) of the automated regulation means is adjusted in respect to the heat demand in said heat distribution network.
- Apparatus according to the invention further comprises at least one control unit, wherein such a controller shall be an autonomous device for thermal management regulation or alternatively, at least basic functions of the thermal management controller for determination process, comparison process and execution process could be incorporated and implemented to the hot water plant (HWP) controller or in to the heat pump (HP) controller as well.
- HWP hot water plant
- HP heat pump
- the environment and thermal conditions of heat distribution network is determined by the group of thermal, pressure or other sensors, wherein at least one input from at least one sensor of heat distribution network or hot water plant (HWP) is used for comparison process, where at least one value of at least one input parameter (i.e.
- the execution process comprises a process of executing instructions stored in control unit to generate appropriate output signal, where at least one parameter for thermal energy balance adjustment is generated, executed and performed by control electronics in cooperation with automated regulation means in order to reach and maintain the threshold set-point value, wherein said threshold value is defined between the maximum value and the minimum value for set point equal value with aim to provide a hysteresis for thermal energy balance adjustment.
- control unit i.e. electronic module
- control unit may communicate with various output devices where the temperature of the heat transfer medium in the heat transfer network is determined, controlled and regulated by a group of automated regulation means comprising motorized valves, pumps and sensors, wherein regulation means are preferably adapted to be manipulated by at least one control unit.
- the heat distribution process in heat distribution network is provided by at least one heat transfer medium, preferably by plurality of heat distribution mediums.
- the heat in said heat transfer network is transferred from first heat releasing unit to the heat consumer (HC) by circulation of the primary heat transfer medium in at least one closed loop circuit, and similarly the heat from waste heat recovery unit is transferred to the heat pump (HP) by circulation of the secondary heat transfer medium in at least one closed loop circuit, wherein the heat upgraded by at least one heat pump (HP) is furthermore transferred from heat pump (HP) condenser unit to at least one boiler inlet in the scope of said hot water plant (HWP) by said primary heat transfer medium.
- the heat of flue gases in the scope of the hot water plant is used for utilization of water source high temperature heat pump (HP), wherein upgraded heat is preferably used for reheating or preheating of primary heat transfer medium in at least one heat distribution network.
- HP water source high temperature heat pump
- all vital components of heat distribution circuit are preferably operably coupled for heat transfer medium circulation, wherein the compressor of the incorporated heat pump (HP) shall be driven by electric machine, powered by electricity from grid or generator, or alternatively if appropriate, a high temperature heat pumps (HP) compressor shall be mechanically coupled to and driven by additional internal combustion engine as well.
- the primary heat transfer medium in preferential embodiment is water and similarly, the secondary heat transfer medium in preferential embodiment is mix of water and glycol.
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Abstract
Description
- The object of this patent application relates to the methods and apparatus for gas fired hot water plant waste heat recovery with incorporated high temperature water source heat pump for waste heat source utilization.
- Heat pumps that have been used in prior art to enhance the heating power of hot water and power plants for the supply of industrial and district heating networks by utilizing the waste heat recovery have been deployed in a various designs. According to CN101900318A the waste heat of flue gas is used by incorporated air to air type heat pump to improve the heating performance of gas fired power plant, wherein the heat generated by integrated heat pump is fed to the air to water type heat exchanger being connected with supply pipeline of heat distribution circuit. In accordance the main disadvantage of represented approach is relatively low thermal performance compared to the proposed solution with water source type heat pump as explained hereinafter.
- This invention relates to the hot water plants for the supply of industrial and district heating networks, wherein at least one incorporated water source high temperature heat pump is used to upgrade a low temperature heat from at least one waste heat source to the higher temperature heat output, which can be afterwards used directly or indirectly by at least one heat consumer for space or process heating, preferably in the scope of district heating. It is important to notice, that the heat pump according to the invention is used to heat up and rise the temperature of a primary heat transfer medium in a supply line of an open loop heating network, and/or in a return line of a closed loop heating circuit, wherein a design (i.e. operational) temperature of the primary heat transfer medium in a forward line of the heat distribution network is substantially higher than 45° C., at least when operating at normal operating conditions. It can be understood, that operating conditions of the heat distribution network are provided after commissioning and warm-up process where at least basic design temperature of the heat distribution network is successfully achieved and maintained (i.e. established) over at least a short period of time, hence at least one first heat releasing unit is turned on and operating by firing the fuel in the fuel burning (i.e. combustion) process in the scope of substantially a continuous operation, and at least one second heat releasing unit (i.e. heat pump) is turned on and operating for liquid-vapor phase change thermodynamic cycle process and waste heat source utilization. In accordance, at least one furnace with at least one incorporated boiler in the scope of said hot water plant and at least one water source high temperature heat pump are used to provide a first and a second heat source respectively in the scope of the heat distribution network, where individual unit shall substantially operate in the range between its minimum and maximum rated (i.e. full load) operating power, preferably at normal rated power for highest power efficiency developed in continuous operation.
- Exemplary embodiment of the present invention will now be described with reference to the accompanying drawing, i.e. schematics of a hot water plant with incorporated water source high temperature heat pump in the scope of a heat distribution network, here shown as a simple single closed loop heating circuit.
-
FIG. 1 shows a schematic representation of a hot water plant preferential embodiment with incorporated water source high temperature heat pump (HP) having a condenser unit, an evaporator unit, and a compressor with adopted lubrication oil cooling system (CS) for heat pump principle utilization, where following items are further shown and marked: first heat releasing unit of depicted hot water plant (HWP), heat distribution circuit and exhaust system comprising a network of pipes (PI-P13), valves (VI-V2) and pumps (PU1-PU4) which interconnects the heat consumer (HC) with stated heat sources, heat exchanger (HE), hatch (HI), fan (FI), ambient (O) and control temperature sensors (TI-T12). - Referring to the preferential embodiment of the power plant with incorporated water source high temperature heat pump (HP), the system comprises a furnace with incorporated boiler in the scope of first heat releasing unit of hot water plant (HWP), which preferably runs on a gas fuel, such as natural gas, liquefied petroleum gas, landfill gas, wood gas, biogas or coal for example. While hot water plant (HWP) first heat releasing unit is used for heat generation when powered, a significant amount of heat is released by the flue gas, wherein the heat is either used by heat consumer (HC) rather than discharged and dissipated to the ambient (O) through the exhaust pipe (P12) (i.e. chimney). It is important to notice, that the first heat source for heat consumer (HC) is preferably represented by boiler in the scope of the hot water plant (HWP), having an inlet and outlet aperture, whereby plurality of waste heat sources arise in the scope of the hot water plant (HWP) and incorporated heat pump (HP), at least when the hot water plant (HWP) and heat pump (HP) are turned on and powered, preferably at optimum efficiency or full load regime.
- Effective recovery of waste heat is critical to provide a good total utilization of fuel energy, thus, first and most important waste heat source is represented by the stream of high temperature flue gas in exhaust system, which is a product of the combustion process within the hot water plant (HWP). Secondly, there is at least one additional waste heat source represented by heat pump (HP) compressors lubrication oil cooling systems (CS), which is under certain circumstances still important for good total waste heat source utilization.
- According to the depicted preferential embodiment as represented on
FIG. 1 , the hot water plant (HWP) boilers inflow (i.e. inlet port) and outflow (i.e. outlet port) apertures are operably coupled to the closed loop heating circuit comprising a network of pipes (PI-PII) that operably interconnects the heat consumer (HC) and heat sources in the scope of hot water plant (HWP) with incorporated water source high temperature heat pump (HP). The heat distribution network further comprises a primary heat transfer medium and automated regulation means comprising a control unit (i.e. control electronics), valves (VI-V2) and pumps (PU1-PU4) for primary heat transfer medium stream flow regulation, wherein the heat of heat sources is preferably transferred to the heat consumer (HC) by principle of primary heat transfer medium circulation in the closed loop heating circuit. - As partially known from prior art, the waste heat of flue gas is eventually utilized by incorporated heat exchanger (HE) which collects the high temperature waste heat of flue gas in exhaust system, wherein the exhaust heat exchanger (HE) is capable to collect and transfer the heat of said waste heat source due to the significant temperature difference between the temperature of flue gas in exhaust system and the temperature of primary heat transfer medium in incorporated heat exchanger (HE). In addition, as explained in CN101900318A, the heat of the flue gas is not only collected, but also upgraded by incorporated air source heat pump, wherein it is essential to notice, that according to stated solution from prior art, the waste heat collected by heat pipe is used to upgrade the heat of flue gas by air to air heat pump principle utilization, hence the heat of high temperature flue gas is transferred to the primary heat transfer medium in a chamber of incorporated air to water type heat exchanger.
- According to the invention, the exhaust system preferably comprises at least one condensing type heat exchanger (HE) to collect the heat of flue gas, wherein collected heat is transferred to the evaporator unit of water source high temperature heat pump (HP) by circulation of secondary heat transfer medium with aim to upgrade and enhance the heating power of the hot water plant (HWP). While the temperature of flue gas in exhaust system is rapidly reduced (preferably below 45° C.), the exhaust system may further comprise a suction fan (FI) for removal of flue gas from exhaust system. Furthermore, depicted embodiment comprises the lubrication oil cooling system (CS) in form of a heat exchanger, operably coupled to the evaporator unit with aim to collect the waste heat of heat pump (HP) compressors lubrication oil, which is afterwards upgraded by a liquid-vapor phase change thermodynamic cycle utilization process and transferred to the heat distribution network by incorporated water source high temperature heat pump (HP).
- Since the apparatus according to preferential embodiment comprises at least one motorized valve, preferably hatch (HI) for flue gas stream manipulation (i.e. regulation), regulated by main control unit, the utilization of flue gas waste heat source is maximized by high temperature heat pump (HP), when the flue gas stream is fully enforced through the condensing heat exchanger (HE), hence it collects the waste heat required for heat pump (HP) principle utilization. If appropriate, the heat exchanger (HE) and heat pump (HP) shall be implemented in a multistage or cascade principle approach comprising a plurality of heat pumps (HP) and/or heat exchangers (HE) in parallel and/or serial connection to reach the optimized total waste heat source utilization.
- While there are several options for waste heat source utilization it is essential to notice, that preferential embodiment of water source high temperature heat pump (HP) utilization uses at least one low temperature waste heat source for vaporization of working medium of incorporated heat pump (HP), wherein the condenser unit outlet is preferably fed (i.e. operably coupled) to the heat distribution circuit return line, more precisely to the inflow of the boiler in the scope of closed loop heat distribution system. It can be understood, that proposed concept is suitable for open loop heat distribution system as well, where it is essential to notice, that in such an embodiment the condenser unit outlet of said high temperature heat pump (HP) is fed to the inlet of the boiler in hot water plant (HWP) with aim to preheat the primary medium of said open loop heat distribution circuit, hence the temperature difference between involved heat transfer medium in the supply line and working medium in condenser unit is the highest. It can be understood, that suggested approach is essential for total waste heat source utilization, since the coefficient of performance is depended on temperature difference of involved heat transfer medium in the heat pump (HP) condenser and evaporator unit.
- Furthermore, the invention relates to a method of the heat pump (HP) integration process and to a method of hot water plant (HWP) waste heat source utilization.
- The following steps represent the key features of a heat pump (HP) integration and novel method for hot water plant (HWP) waste heat source utilization:
- 1. Integration of the water source high temperature heat pump (HP) having a condenser and evaporator unit with working medium for liquid-vapor phase change thermodynamic cycle utilization and at least one heat exchanger (HE), wherein:
A) the high temperature heat pump (HP) condenser unit is operably coupled to the heat distribution return line in a closed loop heat distribution system or to the supply line in an open loop heat distribution system;
B) the high temperature heat pump (HP) evaporator unit is operably coupled with at least one heat exchanger (HE) in a closed loop piping system with secondary heat transfer medium involved.
2. Collecting the heat by incorporated heat exchanger (HE) from at least one waste heat source, wherein the heat source is:
A) The stream of a flue gas in exhaust system; and/or
B) The lubrication oil in heat pump (HP) compressors lubrication oil cooling system.
3. Transfer of the heat from at least one heat exchanger (HE) to the high temperature heat pump (HP) evaporator unit, preferably by circulation of secondary heat transfer medium in the closed loop piping system.
4. Transfer of the heat from secondary heat transfer medium to the working medium in evaporator unit of the high temperature heat pump (HP), wherein at least low temperature heat from at least one waste heat source is upgraded by working medium liquid-vapor phase change thermodynamic cycle, hence the temperature of the working medium in condenser unit is substantially higher than the temperature of the working medium in evaporator unit.
5. Transfer of the heat from working medium in the high temperature heat pump (HP) to the primary heat transfer medium in the heat distribution network, wherein the
temperature of the primary heat transfer medium at condenser unit outlet is substantially higher than temperature of the primary heat transfer medium at condenser unit inlet, hence the high temperature output of condenser unit is fed to at least one boiler inlet in the scope of hot water plant (HWP), where the primary heat transfer medium is reheated by firing the fuel in the boiler.
6. Transfer of the heat from at least one boiler in the scope of hot water plant (HWP) to at least one heat consumer (HC) in open or closed loop heat distribution network.
7. Usage of high temperature primary heat transfer medium by at least one heat consumer (HC) in the scope of the district heating, industrial or technological process. - Furthermore, the following steps represent the key features of a method of using an apparatus according to the invention:
- 1. A fuel combustion process, where preferably at least one furnace is used for burning the fuel in the scope of the hot water plant (HWP) with aim to provide a first heat releasing unit for heating at least one heat transfer medium in the boiler, wherein at least one waste heat source arise when said first heat releasing unit is turned on and operating by firing the fuel in the combustion process. Accordingly, plurality of boilers and/or furnaces in parallel or serial connection shall be used to provide an advanced embodiment of the first heat releasing unit.
2. A waste heat recovery process which comprises a process of collecting the waste heat, wherein at least one waste heat recovery unit (i.e. heat exchanger (HE)) is used to collect at least a portion of the heat of at least one waste heat source from group of waste heat sources comprising a flue gas in exhaust system and lubrication oil in lubrication oil cooling system in the scope of the integrated heat pump (HP). Accordingly, plurality of waste heat recovery units in parallel or serial connection shall be used to provide an advanced embodiment of apparatus for waste heat recovery process utilization. - A liquid-vapor phase change thermodynamic cycle utilization process, wherein at least one water source high temperature heat pump (HP) shall be used to provide a second heat releasing unit for heating at least one heat transfer medium in said heat distribution network, at least when said heat pump (HP) is turned on and operating. Accordingly, plurality of heat pumps (HP) units in parallel or serial connection is used to provide an advanced edition of the second heat releasing unit.
- Usage of collected heat for liquid-vapor phase change utilization, wherein at least a portion of collected heat is used for the liquid-vapor phase change cycle utilization and wherein at least a portion of the heat generated by at least one heat pump (HP) in the scope of the second heat releasing unit is used for heating the primary heat transfer medium in heat pump (HP) condenser unit.
- Distribution of the heat in at least one closed loop circuit of said heat distribution network by circulation of at least one heat transfer medium, wherein the lowest temperature of the heat distribution medium in at least one boiler inlet in the scope of the first heat releasing unit is substantially higher than the lowest temperature of the heat distribution medium in at least one heat consumer (HC). Hence, at least one heat transfer medium in at least one return line of said closed loop heat distribution network is reheated by the heat pump (HP) principle utilization, at least when a design temperature of the heat distribution network is reached and said hot water plant (HWP) and heat pump (HP) are operating at full load; and/or
- Distribution of the heat in at least one open loop heat distribution network by at least one heat transfer medium, wherein the inlet temperature of the primary heat distribution medium in at least one boiler inlet in the scope of the first heat releasing unit is substantially higher than temperature of the primary heat distribution medium in at least one heat pump (HP) condenser unit inlet, wherein said condenser unit inlet is operably connected to supply line of heat transfer medium source in open loop connection. Hence, at least one line of primary heat transfer medium in at least one supply line of said open loop heat distribution network is preheated by the heat pump (HP) principle utilization, at least when a design temperature of the heat distribution network is reached and said hot water plant (HWP) and heat pump (HP) are operating at full load.
- In addition to represented method of using the apparatus according to the invention, few explanations and definitions are required, wherein combustion process is substantially a continuous process, while at least one furnace with incorporated boiler in the scope of hot water plant (HWP) normally operates in the range between its minimum and maximum rated operating power, preferably at normal rated power in continuous operation. Similarly the liquid-vapor phase change thermodynamic cycle utilization process is substantially a continuous process, wherein said heat pump (HP) operates in the range between its minimum and maximum rated operating power, preferably at normal rated power in continuous operation. If appropriate, the fuel combustion process in an advanced hot water plant (HWP) embodiment shall be provided by plurality of boilers and/or furnace units in the scope of the first heat releasing unit, wherein the heat in the scope of the first heat releasing unit is transferred in serial and/or in parallel connection and similarly, the liquid-vapor phase change thermodynamic cycle utilization process shall be utilized by plurality of heat pump (HP) units to provide a second heat releasing unit of the advanced hot power plant (HWP).
- While one of the key features of a method and apparatus according to the invention is establishment of predetermined set point value of primary heat transfer medium temperature in heat distribution system, the thermal energy balance adjustment is executed by adapting the power of said heat pump (HP) and/or by adapting the power of said furnace in the scope of first heat releasing unit and/or by adapting the mass flow of the primary heat transfer medium through the heat distribution system. Accordingly the mass flow of the primary heat transfer medium in said closed loop heat distribution circuit is adapted by changing the flow velocity in said heat distribution circuit and/or the mass flow of the secondary heat transfer medium in said closed loop circuit is adapted by changing the flow velocity in said closed loop circuit, wherein the velocity of heat transfer medium in heat distribution network is adapted by switching (i.e. on/off regulation) and/or by adjusting the power of at least one circulation pump for mass flow adjustment. In addition, the mass flow of the primary heat transfer medium in depicted heat distribution circuit is alternatively adapted by stream flow regulation, wherein at least a portion of the primary heat transfer medium stream in the return line of said heat distribution circuit is redirected to the return line of said heat distribution circuit to provide a heat pump (HP) bypass connection, and/or wherein at least a portion of the primary heat transfer medium stream from said heat pump (HP) is redirected to a forward line of the heat distribution circuit to provide a hot water plant (HWP) bypass connection with aim to balance the power generated by first and second heat releasing units. Similarly the mass flow of the secondary heat transfer medium in said closed loop circuit for waste heat source utilization is adapted by stream flow regulation, wherein at least a portion of the secondary heat transfer medium stream is redirected in said closed loop circuit to provide a bypass connection for at least one waste heat recovery unit. Accordingly, the mass flow regulation of the primary heat transfer medium and/or the mass flow regulation of the secondary heat transfer medium for thermal energy balance adjustment is determined, controlled and executed by at least one control unit (i.e. electronic controller), wherein the position and/or the state (i.e. open/closed or on/off regulation) of the automated regulation means is adjusted in respect to the heat demand in said heat distribution network.
- Apparatus according to the invention further comprises at least one control unit, wherein such a controller shall be an autonomous device for thermal management regulation or alternatively, at least basic functions of the thermal management controller for determination process, comparison process and execution process could be incorporated and implemented to the hot water plant (HWP) controller or in to the heat pump (HP) controller as well. In the determination process the environment and thermal conditions of heat distribution network is determined by the group of thermal, pressure or other sensors, wherein at least one input from at least one sensor of heat distribution network or hot water plant (HWP) is used for comparison process, where at least one value of at least one input parameter (i.e. preferably the value of an inlet temperature of the primary heat transfer medium hot water plant (HWP) is analyzed and compared to the nominal values, preferably being pre-defined and stored in the control unit. Accordingly the execution process comprises a process of executing instructions stored in control unit to generate appropriate output signal, where at least one parameter for thermal energy balance adjustment is generated, executed and performed by control electronics in cooperation with automated regulation means in order to reach and maintain the threshold set-point value, wherein said threshold value is defined between the maximum value and the minimum value for set point equal value with aim to provide a hysteresis for thermal energy balance adjustment.
- It can be understood that control unit (i.e. electronic module) may communicate with various output devices where the temperature of the heat transfer medium in the heat transfer network is determined, controlled and regulated by a group of automated regulation means comprising motorized valves, pumps and sensors, wherein regulation means are preferably adapted to be manipulated by at least one control unit. And furthermore, the heat distribution process in heat distribution network is provided by at least one heat transfer medium, preferably by plurality of heat distribution mediums. Accordingly the heat in said heat transfer network is transferred from first heat releasing unit to the heat consumer (HC) by circulation of the primary heat transfer medium in at least one closed loop circuit, and similarly the heat from waste heat recovery unit is transferred to the heat pump (HP) by circulation of the secondary heat transfer medium in at least one closed loop circuit, wherein the heat upgraded by at least one heat pump (HP) is furthermore transferred from heat pump (HP) condenser unit to at least one boiler inlet in the scope of said hot water plant (HWP) by said primary heat transfer medium.
- Summarizing, the heat of flue gases in the scope of the hot water plant (HWP) is used for utilization of water source high temperature heat pump (HP), wherein upgraded heat is preferably used for reheating or preheating of primary heat transfer medium in at least one heat distribution network. It can be understood, that all vital components of heat distribution circuit are preferably operably coupled for heat transfer medium circulation, wherein the compressor of the incorporated heat pump (HP) shall be driven by electric machine, powered by electricity from grid or generator, or alternatively if appropriate, a high temperature heat pumps (HP) compressor shall be mechanically coupled to and driven by additional internal combustion engine as well. Furthermore, as can be dearly read out from previous description, the primary heat transfer medium in preferential embodiment is water and similarly, the secondary heat transfer medium in preferential embodiment is mix of water and glycol.
- In the foregoing description those skilled in the art will readily appreciate that modifications may be made to the invention without departing from the concepts disclosed herein. Such modifications are to be considered as included in the following claims, unless these claims expressly state otherwise.
Claims (15)
Applications Claiming Priority (3)
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SI201500215A SI25059A (en) | 2015-09-11 | 2015-09-11 | A method and a device for utilization of low-temperature sources of gas boilers with high-temperature heat pump by water/water concept |
SIP-201500215 | 2015-09-11 | ||
PCT/IB2016/000387 WO2017042613A1 (en) | 2015-09-11 | 2016-03-24 | Method and apparatus for utilization of hot water plant waste heat recovery by incorporated high temperature water source heat pump |
Publications (1)
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US20180245800A1 true US20180245800A1 (en) | 2018-08-30 |
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US15/757,462 Abandoned US20180245800A1 (en) | 2015-09-11 | 2016-03-24 | Method and apparatus for utilization of hot water plant waste heat recovery by incorporated high temperature water source heat pump |
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US (1) | US20180245800A1 (en) |
EP (1) | EP3347646A1 (en) |
JP (1) | JP2018533712A (en) |
CN (1) | CN108139071A (en) |
CA (1) | CA2997124A1 (en) |
SI (1) | SI25059A (en) |
WO (1) | WO2017042613A1 (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20180180299A1 (en) * | 2016-12-22 | 2018-06-28 | Raymond Hallit | Automatic firing rate control for a heat exchanger |
CN113175833A (en) * | 2020-04-10 | 2021-07-27 | 山东大学 | Double-vibration heat pipe heat exchanger combination and ground source heat pump system thereof |
EP4001598A1 (en) * | 2020-11-16 | 2022-05-25 | Valmet Technologies Oy | Method and arrangement |
CN114576693A (en) * | 2020-11-30 | 2022-06-03 | 上海本家空调系统有限公司 | Gas heat pump heating system |
US20230029186A1 (en) * | 2019-10-25 | 2023-01-26 | M.E.D. Energy Inc. | Method for thermal energy transmission using water and carbon dioxide |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102017202227A1 (en) * | 2017-02-13 | 2018-08-16 | Siemens Aktiengesellschaft | Method for operating a heat pump system, heat pump system and power plant with a heat pump system |
CN108826418A (en) * | 2018-07-30 | 2018-11-16 | 清华大学 | A kind of residual heat from boiler fume recovery system and working method based on gas-burning machine heat pump |
CN113142151B (en) * | 2021-03-17 | 2022-10-04 | 王德江 | Mute ice surface tapping machine |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4055299A (en) * | 1975-08-05 | 1977-10-25 | Stal-Laval Turbin Ab | Energy source for large heating systems |
GB2076138A (en) * | 1980-04-03 | 1981-11-25 | Ti Creda Manufacturing Ltd | Heat pumps |
US20060037349A1 (en) * | 2004-08-17 | 2006-02-23 | Lg Electronics Inc. | Cogeneration system and method for controlling the same |
EP2644993A2 (en) * | 2012-03-26 | 2013-10-02 | Elomatic Oy | Method and arrangement for transferring heat from flue gas into fluid |
US20140007577A1 (en) * | 2010-10-14 | 2014-01-09 | Trond Melhus | Method and System for the Utilization of an Energy Source of Relatively Low Temperature |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB8311260D0 (en) * | 1983-04-26 | 1983-06-02 | Patscentre Benelux Nv Sa | Boiler |
JPH0334610Y2 (en) * | 1984-09-20 | 1991-07-23 | ||
US4660511A (en) * | 1986-04-01 | 1987-04-28 | Anderson J Hilbert | Flue gas heat recovery system |
ITDP20040005A1 (en) * | 2004-12-20 | 2005-03-20 | Stefano Bandini | CONDENSING MODULE FOR BOILER |
AT506679B1 (en) * | 2008-05-05 | 2010-04-15 | Guenter Hirr | PLANT FOR POWER HEAT COUPLING |
DE102008023068A1 (en) * | 2008-05-09 | 2009-11-12 | Claas Saulgau Gmbh | Control for mounted, towed or semi-mounted agricultural machinery, as interchangeable equipment in connection with tractors |
CH700750A1 (en) * | 2009-04-15 | 2010-10-15 | Roberto Gianfrancesco | System for the production of thermal energy. |
CN101900318A (en) | 2009-06-01 | 2010-12-01 | 王文庭 | Waste-heat recovery device of boiler heat pump |
CN102419031B (en) * | 2011-11-24 | 2013-07-24 | 上海环球制冷设备有限公司 | Superhigh-temperature heat pump device and use method |
CN204214166U (en) * | 2014-09-26 | 2015-03-18 | 北京金房暖通节能技术股份有限公司 | Water source heat pump units and flue gas waste heat recovery apparatus combined operation system |
-
2015
- 2015-09-11 SI SI201500215A patent/SI25059A/en active IP Right Grant
-
2016
- 2016-03-24 CA CA2997124A patent/CA2997124A1/en not_active Abandoned
- 2016-03-24 WO PCT/IB2016/000387 patent/WO2017042613A1/en active Application Filing
- 2016-03-24 US US15/757,462 patent/US20180245800A1/en not_active Abandoned
- 2016-03-24 JP JP2018512864A patent/JP2018533712A/en active Pending
- 2016-03-24 EP EP16724455.7A patent/EP3347646A1/en not_active Withdrawn
- 2016-03-24 CN CN201680052626.4A patent/CN108139071A/en active Pending
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4055299A (en) * | 1975-08-05 | 1977-10-25 | Stal-Laval Turbin Ab | Energy source for large heating systems |
GB2076138A (en) * | 1980-04-03 | 1981-11-25 | Ti Creda Manufacturing Ltd | Heat pumps |
US20060037349A1 (en) * | 2004-08-17 | 2006-02-23 | Lg Electronics Inc. | Cogeneration system and method for controlling the same |
US20140007577A1 (en) * | 2010-10-14 | 2014-01-09 | Trond Melhus | Method and System for the Utilization of an Energy Source of Relatively Low Temperature |
EP2644993A2 (en) * | 2012-03-26 | 2013-10-02 | Elomatic Oy | Method and arrangement for transferring heat from flue gas into fluid |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20180180299A1 (en) * | 2016-12-22 | 2018-06-28 | Raymond Hallit | Automatic firing rate control for a heat exchanger |
US10883729B2 (en) * | 2016-12-22 | 2021-01-05 | Rheem Manufacturing Company | Automatic firing rate control for a heat exchanger |
US20230029186A1 (en) * | 2019-10-25 | 2023-01-26 | M.E.D. Energy Inc. | Method for thermal energy transmission using water and carbon dioxide |
US11719469B2 (en) * | 2019-10-25 | 2023-08-08 | M.E.D. Energy Inc. | Method for thermal energy transmission using water and carbon dioxide |
CN113175833A (en) * | 2020-04-10 | 2021-07-27 | 山东大学 | Double-vibration heat pipe heat exchanger combination and ground source heat pump system thereof |
EP4001598A1 (en) * | 2020-11-16 | 2022-05-25 | Valmet Technologies Oy | Method and arrangement |
CN114576693A (en) * | 2020-11-30 | 2022-06-03 | 上海本家空调系统有限公司 | Gas heat pump heating system |
Also Published As
Publication number | Publication date |
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CA2997124A1 (en) | 2017-03-16 |
CN108139071A (en) | 2018-06-08 |
SI25059A (en) | 2017-03-31 |
WO2017042613A1 (en) | 2017-03-16 |
JP2018533712A (en) | 2018-11-15 |
EP3347646A1 (en) | 2018-07-18 |
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