WO2004092662A1 - Energy recovery system - Google Patents
Energy recovery system Download PDFInfo
- Publication number
- WO2004092662A1 WO2004092662A1 PCT/JP2004/004400 JP2004004400W WO2004092662A1 WO 2004092662 A1 WO2004092662 A1 WO 2004092662A1 JP 2004004400 W JP2004004400 W JP 2004004400W WO 2004092662 A1 WO2004092662 A1 WO 2004092662A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- heat
- medium
- energy recovery
- recovery system
- refrigerant
- Prior art date
Links
- 238000011084 recovery Methods 0.000 title claims abstract description 36
- 239000003507 refrigerant Substances 0.000 claims abstract description 99
- 239000002826 coolant Substances 0.000 claims abstract description 72
- 230000005611 electricity Effects 0.000 claims abstract description 41
- 238000001816 cooling Methods 0.000 claims abstract description 22
- 239000003463 adsorbent Substances 0.000 claims description 28
- 238000001179 sorption measurement Methods 0.000 claims description 11
- 238000004378 air conditioning Methods 0.000 claims description 10
- 238000003795 desorption Methods 0.000 claims description 10
- 239000002918 waste heat Substances 0.000 description 11
- 238000001704 evaporation Methods 0.000 description 7
- 230000008020 evaporation Effects 0.000 description 6
- 238000005057 refrigeration Methods 0.000 description 6
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00357—Air-conditioning arrangements specially adapted for particular vehicles
- B60H1/00385—Air-conditioning arrangements specially adapted for particular vehicles for vehicles having an electrical drive, e.g. hybrid or fuel cell
- B60H1/004—Air-conditioning arrangements specially adapted for particular vehicles for vehicles having an electrical drive, e.g. hybrid or fuel cell for vehicles having a combustion engine and electric drive means, e.g. hybrid electric vehicles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/02—Heating, cooling or ventilating [HVAC] devices the heat being derived from the propulsion plant
- B60H1/14—Heating, cooling or ventilating [HVAC] devices the heat being derived from the propulsion plant otherwise than from cooling liquid of the plant, e.g. heat from the grease oil, the brakes, the transmission unit
- B60H1/143—Heating, cooling or ventilating [HVAC] devices the heat being derived from the propulsion plant otherwise than from cooling liquid of the plant, e.g. heat from the grease oil, the brakes, the transmission unit the heat being derived from cooling an electric component, e.g. electric motors, electric circuits, fuel cells or batteries
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B27/00—Machines, plants or systems, using particular sources of energy
- F25B27/02—Machines, plants or systems, using particular sources of energy using waste heat, e.g. from internal-combustion engines
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N10/00—Thermoelectric devices comprising a junction of dissimilar materials, i.e. devices exhibiting Seebeck or Peltier effects
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N10/00—Thermoelectric devices comprising a junction of dissimilar materials, i.e. devices exhibiting Seebeck or Peltier effects
- H10N10/10—Thermoelectric devices comprising a junction of dissimilar materials, i.e. devices exhibiting Seebeck or Peltier effects operating with only the Peltier or Seebeck effects
- H10N10/13—Thermoelectric devices comprising a junction of dissimilar materials, i.e. devices exhibiting Seebeck or Peltier effects operating with only the Peltier or Seebeck effects characterised by the heat-exchanging means at the junction
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/22—Heating, cooling or ventilating [HVAC] devices the heat being derived otherwise than from the propulsion plant
- B60H2001/2268—Constructional features
- B60H2001/2275—Thermoelectric converters for generating electrical energy
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B15/00—Sorption machines, plants or systems, operating continuously, e.g. absorption type
- F25B15/02—Sorption machines, plants or systems, operating continuously, e.g. absorption type without inert gas
-
- 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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/27—Relating to heating, ventilation or air conditioning [HVAC] technologies
- Y02A30/274—Relating to heating, ventilation or air conditioning [HVAC] technologies using waste energy, e.g. from internal combustion engine
-
- 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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/90—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in food processing or handling, e.g. food conservation
- Y02A40/963—Off-grid food refrigeration
Definitions
- the present invention relates to an energy recovery system.
- a typical energy recovery system has a thermoelectric converter that generates electricity by utilizing a temperature difference between a high temperature thermal medium (high temperature medium) and a low temperature thermal medium (low temperature medium) .
- high temperature medium a thermal medium that receives heat during operation of the working devices
- low temperature medium a thermal medium the temperature of which is lower than the high temperature medium.
- the thermoelectric converter uses waste heat from the working devices to generate electricity. In other words, heat is converted ' into electrical energy.
- thermoelectric converter uses the coolant for cooling the power source and other working devices as a high temperature medium, and uses the outside air, the temperature of which is lower than that of the coolant, as a low temperature medium.
- Publication No. 2002-59736 discloses a technique applied to a case where an internal combustion engine is used as a drive source.
- the technique uses the temperature difference between exhaust of the engine and the coolant temperature, instead of the temperature difference between the coolant and the outside air.
- the low temperature medium is the coolant
- the high temperature medium is the exhaust. Since the temperature of the exhaust is significantly higher than the coolant temperature, normal operation of the engine guarantees a sufficient temperature difference for generating electricity through thermoelectric conversion.
- the temperature of the coolant is relatively stable, the temperature of the exhaust greatly varies depending on the operating state of the engine, for example, in a range from 100 C to 800 ° C. Such great temperature changes can damage the thermoelectric converter.
- the high temperature medium be coolant from the power source and other working devices and that the low temperature medium be a low temperature refrigerant since the temperature of coolant is relatively stable, and the temperature of a refrigerant is forcibly maintained low by a refrigeration apparatus.
- the temperature difference between the high temperature medium and the low temperature medium is sufficient for generating electricity since the low temperature refrigerant, which is the low temperature medium, is maintained to be cold by the refrigeration apparatus.
- the temperature of the low temperature refrigerant is maintained in a certain range by the refrigeration apparatus, the temperature of the refrigerant is not abruptly changed, which prevents the thermoelectric converter from being damaged.
- thermoelectric converter is capable of reliably generating electricity.
- thermoelectric converter it is an objective of the present invention to provide an energy recovery system that improves energy efficiency, while reliably generating electricity with a thermoelectric converter.
- the present invention provides an energy recovery system for converting heat generated during operation of a working device into electrical energy using first and second thermal media and recovering the electrical energy.
- the system includes a cooling device that cools one of the thermal media, generating a low temperature thermal medium by maintaining the temperature of the one of the thermal media at a predetermined value, and a thermoelectric converter that generates electricity by utilizing a temperature difference between the low temperature thermal medium and the other one of the thermal media.
- the other one of the thermal media is maintained at a temperature higher than the low temperature thermal medium by heat generated during operation of the working device to generate a high temperature thermal medium with the other one of the thermal media.
- the cooling device is a heat pump that generates the low temperature thermal medium by utilizing heat from the high temperature thermal medium.
- Fig. 1 is a diagrammatic view illustrating an energy recovery system according to one embodiment
- Fig. 2 is a diagrammatic view illustrating desorption by the heat pump shown in Fig. 1;
- Fig. 3 is a diagrammatic view illustrating adsorption by the heat pump shown in Fig. 1.
- the hybrid automobile has an engine 1 and a motor 2 as drive sources.
- the automobile also has a generator 3 and a thermoelectric converter 4 for charging a battery 7.
- the generator 3 is driven by the engine 1 to generate electricity.
- the thermoelectric converter 4 uses waste heat from the vehicle to generate electricity. Charging of the battery 7 with electricity generated by the thermoelectric converter 4 allows waste heat from the automobile to be recovered as electrical energy.
- the output of the generator 3 and the thermoelectric converter 4 and the operation of the motor 2 are controlled by a power control unit 6, which is controlled by an electric control unit 5.
- the hybrid automobile further has an engine coolant circuit 11, in which engine coolant (high temperature refrigerant) circulates to cool the engine 1, the motor 2, and the power control unit 6.
- engine coolant high temperature refrigerant
- the engine coolant in the engine coolant circuit 11 is circulated through the circuit 11 by a coolant pump 12.
- the engine coolant passes through a radiator 13 after passing through the thermoelectric converter 4.
- heat exchange takes place between the engine coolant and working devices that include the engine 1, the motor 2, and the power control unit 6.
- the temperature of the engine coolant is maintained in a range between 80 ° C and 90 ° C by heat generated during operation of the working devices.
- the thermoelectric converter 4 generates electricity utilizing a difference between the temperature of a high temperature thermal medium (high temperature medium) and the temperature of a low temperature thermal medium (low temperature medium) .
- the engine coolant which passes through the thermoelectric converter 4, is used as the high temperature medium.
- pump refrigerant low temperature refrigerant
- the pump refrigerant in the pump refrigerant circuit 15 is circulated through the circuit 15 by a refrigerant pump 16 and passes through the thermoelectric converter 4.
- the pump refrigerant is cooled by a heat pump 14 and maintained at a low temperature in a range, for example, between 10 ° C and 20 ° C.
- the engine coolant which is the high temperature medium used in electricity generation at the thermoelectric converter 4
- the pump refrigerant which is the low temperature medium used in the electricity generation
- the temperatures of the high temperature medium and the low temperature medium both fluctuate in a narrow range and are stable.
- the thermoelectric converter 4 is hardly damaged by a great temperature change in the high temperature medium or the low temperature medium.
- the pump refrigerant is cooled by the heat pump 14 so that the temperature of the pump refrigerant is maintained to be low. Accordingly, the temperature difference between the engine coolant and the pump refrigerant is sufficient for electricity generation at the thermoelectric converter 4.
- the pump refrigerant in the pump refrigerant circuit 15 is not only used for electricity generation at the thermoelectric converter 4, but also used to assist air conditioning performed by an air conditioner mounted on the hybrid automobile.
- the pump refrigerant circuit 15 has a heat exchanger 17, which performs heat exchange between the low pressure refrigerant passing through the heat exchanger 17 and air that will be drawn into the passenger compartment.
- the pump refrigerant circuit 15 also includes valves 18, 19 for selecting a course for the pump refrigerant, which is circulated by the refrigerant pump 16, between a course including the thermoelectric converter 4 and a course including the heat exchanger 17. In other words, the valves 18, 19 are switched such that the pump refrigerant is selectively guided to one of the thermoelectric converter 4 and the heat exchanger 17.
- valves 18, 19 are switched to guide the pump refrigerant to the heat exchanger 17.
- the valves 18, 19 are switched to guide the pump refrigerant to the thermoelectric converter 4.
- the valves 18, 19 function as a switching device to switch the course through which the pump refrigerant flows.
- a refrigeration circuit for the air conditioner, or an air conditioner refrigerant circuit 20 includes a compressor 21. As the compressor 21 operates, the air conditioner refrigerant circulates in the circuit 20 and passes through a condenser 23 and an evaporator 22 provided in the circuit 20. High temperature and high pressure air conditioner refrigerant that has been discharged from the compressor 21 is liquefied by the condenser 23. The liquefied refrigerant is then sent to the evaporator 22 via an expansion valve (not shown) . The evaporator 22 performs heat exchange between refrigerant passing through the evaporator 22 and air that will be supplied to the passenger compartment.
- the heat exchanger 17 is located in the vicinity of the evaporator 22. Air that has been cooled by the evaporator 22 is further cooled by the pump refrigerant that passes through the heat exchanger 17.
- the heat pump which cools the pump refrigerant, will now be described.
- an adsorption heat pump is used, in which adsorption and desorption of a working medium such as ammonia to and from an adsorbent such as activated carbon are repeatedly performed.
- a working medium such as ammonia to and from an adsorbent such as activated carbon
- the working medium that has been desorbed from the adsorbent and evaporated is temporarily liquefied, and then evaporated.
- latent heat of evaporation is used to lower the temperature of the pump refrigerant, thereby cooling the pump refrigerant.
- the heat of the engine coolant circulating in the engine coolant circuit 11 is used to heat the adsorbent to perform the desorption.
- a bypass passage 24 is provided to draw the engine coolant into the heat pump 14.
- a valve 25 is located in a section downstream of the radiator 13. The valve 25 is opened and closed to permit and inhibit the flow of the engine coolant into the bypass passage 24.
- the engine coolant enters the heat pump 14 through a port 24a and exits the heat pump 14 through a port 24b.
- the adsorbent is heated by the heat from the engine coolant, which desorbs the working medium from the adsorbent.
- a heat pump coolant circuit 26 is provided as a cooling system for liquefying the evaporated working medium.
- a heat exchanger 27 is provided in the heat pump coolant circuit 26. The heat exchanger 27 is connected to the air conditioner refrigerant circuit 20 through passages 28, 29. Low temperature air conditioner refrigerant is drawn into the heat exchanger 27 of the air conditioner refrigerant circuit 20 as a valve 30 provided in the passage 28 is opened and closed. Also, as a valve 31 provided in the passage 29 is opened, high temperature air conditioner refrigerant is drawn into the heat exchanger 27 from a section of the air conditioner refrigerant circuit 20 that is downstream of the condenser 23.
- the amount of the high pressure air conditioner refrigerant and the amount of low temperature air conditioner refrigerant drawn into the heat exchanger 27 are adjusted. Accordingly, the temperature of the air conditioner refrigerant in the heat exchanger 27 is adjusted.
- heat pump coolant in the heat pump coolant circuit 26 passes through the heat exchanger 27, heat exchange takes place between the heat pump coolant and the air conditioner refrigerant, which cools the heat pump coolant so that its temperature is maintained in a range, for example, between 30 C and 50 C. That is, to maintain the temperature of the heat pump coolant in the range, the amount of high temperature air conditioner refrigerant and the amount of low temperature air conditioner refrigerant drawn into the heat exchanger 17 are adjusted.
- the heat pump coolant circulating in the heat pump coolant circuit 26 enters the heat pump 14 through a port 26a and exits the heat pump 14 through a port 26b.
- the working medium that has been desorbed and is in an evaporated state is cooled by the heat pump coolant. This liquefies the working medium.
- the pump refrigerant circulating in the pump refrigerant circuit 15 enters the heat pump 14 through a port 15a and exits the heat pump 14 through a port 15b.
- the pump refrigerant in the pump refrigerant circuit 15 is cooled by latent heat of evaporation produced when the working medium is evaporated after being liquefied as described above.
- the pump refrigerant which is cooled and maintained at a low temperature, is used in electricity generation at the thermoelectric converter 4 and in cooling of the air conditioner refrigerant.
- the working medium that evaporates when the pump refrigerant is cooled will be adsorbed by the adsorbent.
- the adsorbent When the working medium is adsorbed by the adsorbent, the adsorbent generates heat. At this time, the generated heat is transmitted to the heat pump coolant, which circulates in the heat pump coolant circuit 26 and is drawn into the heat pump 14. Therefore, even if the adsorbent generates heat during adsorption of the working medium, the generated heat is -taken away by the heat pump coolant. This prevents the temperature of the adsorbent from being abruptly increased.
- the heat pump 14 includes an adsorber/desorber 41 containing adsorbent, a condenser 42 for liquefying a working medium from an evaporated state after being desorbed from the adsorbent, and an evaporator 43 for evaporating the working medium that has been liquefied by the condenser 42.
- the engine coolant circuit 11 (specifically, the bypass passage 24) passes through the adsorber/desorber 41, and the heat pump coolant circuit 26 passes through the adsorber/desorber 41 and the condenser 42.
- the pump refrigerant circuit 15 passes through the evaporator 43.
- the engine coolant that has entered the heat pump 14 through the port 24a flows through a section of the engine coolant circuit 11 that corresponds to the adsorber/desorber 41.
- heat exchange takes place between the engine coolant and the adsorbent.
- the adsorbent is heated so that the working medium is desorbed from the adsorbent.
- the desorption of the working medium from the adsorbent is performed by using the heat from the engine coolant, the temperature of which is maintained to be high, for example, in a range between 80 ° C and 90 ° C by waste heat from the hybrid automobile.
- the working medium flows into the condenser 42 in an evaporated state.
- the heat pump coolant that has entered the heat pump 14 through the port 26a flows through a section of the heat pump coolant circuit 26 that corresponds to the condenser 42.
- heat exchange takes place between the heat pump coolant and the working medium.
- the working medium is cooled and thus liquefied.
- the liquefaction of the working medium in an evaporated state is performed by using the heat pump coolant, the temperature of which is maintained, for example, in a range between 30 ° C and 50 ° C, by the air conditioner refrigerant.
- the working medium that has been liquefied by the condenser 42 flows into the evaporator 43.
- the pump refrigerant that has entered the heat pump 14 through the port 15a flows through a section of the pump refrigerant circuit 15 that corresponds to the evaporator 43.
- the liquefied working medium evaporates, and the latent heat of evaporation lowers the temperature of the pump refrigerant.
- the temperature of the pump refrigerant is maintained to be low, for example, in a range between 10 ° C and 20 ° C.
- the pump refrigerant flows to the thermoelectric converter 4 or the heat exchanger 17 shown in Fig. 1 through the pump refrigerant circuit 15, and is used for electricity generation at the thermoelectric converter 4 or for assisting air conditioning of the air conditioner.
- the working medium that has evaporated at the evaporator 43 flows into the adsorber/desorber 41 and is adsorbed by the adsorbent. At this time, the adsorbent generates heat. However, since the heat pump coolant that has entered the heat pump 14 through the port 26a flows through a section of the heat pump coolant circuit 26 that corresponds to the adsorber/desorber 41 to take away the heat of the adsorbent, the temperature of the adsorbent is prevented from being excessively increased.
- thermoelectric converter 4 To reliably generate electricity with the thermoelectric converter 4 by utilizing waste heat from the hybrid automobile, it is important to maintain the temperature of the pump refrigerant in a predetermined low temperature range so that the temperature difference between the high temperature engine coolant and the low temperature pump refrigerant is suitable for generating electricity.
- the heat pump 14, which functions as a cooling device, maintains the temperature of the pump refrigerant at a low temperature only by using heat from the engine coolant, the temperature of which is maintained to be high by waste heat from the automobile. Therefore, the energy is efficiently used for cooling the pump refrigerant.
- the above described embodiment permits the thermoelectric converter 4 to reliably generate electricity, while maintaining the pump refrigerant at a low temperature. At the same time, the embodiment improves the energy efficiency of the hybrid automobile.
- thermoelectric converter 4 Since electricity generation is reliably performed by the thermoelectric converter 4, the size of the generator 3 for charging the battery 7 of the hybrid automobile can be reduced.
- the heat pump 14 is an adsorption heat pump, which requires a small amount of energy to operate. Therefore, compared to a case where a heat pump of another type is used for cooling the pump refrigerant, the amount of energy required for cooling the pump refrigerant is small.
- the latent heat of evaporation causes the temperature of the working medium to drop. This causes heat exchange between the working medium and the pump refrigerant to take place.
- the heat pump 14 cools the pump refrigerant by utilizing this heat exchange.
- the working medium flows to the condenser 42 in an evaporated state.
- heat exchange takes place between the working medium in an evaporated state and the heat pump coolant maintained in a temperature range, for example, between 30 ° C and 50 ° C. This cools and effectively liquefies the working medium.
- the latent heat of evaporation of the liquefied working medium cools the pump refrigerant. Therefore, the heat pump 14 effectively cools the pump refrigerant.
- the pump refrigerant cooled by the heat pump 14 is not only used for generating electricity at the thermoelectric converter 4, but also for assisting air conditioning of the air conditioner of the hybrid automobile. Therefore, the illustrated embodiment not only improves the energy efficiency by recovering waste heat from the automobile as electrical energy, but also assists the air conditioning of the passenger compartment using waste heat. Thus, the energy efficiency is further improved. Also, since the air conditioning of the passenger compartment is assisted, the sizes of the compressor 23 and the condenser 23 can be reduced while improving the cooling performance of the air conditioner.
- the pump refrigerant cooled by the heat pump 14 is guided to the heat exchanger 17 when air conditioning needs to be assisted during operation of the air conditioner.
- the pump refrigerant is guided to the thermoelectric converter 4 and is used in electricity generation at the thermoelectric converter 4. In this manner, when the pump refrigerant is not used for assisting air conditioning, the pump refrigerant is always used for electricity generation at the thermoelectric converter 4. Therefore, cooling of the pump refrigerant by the heat pump 14 is not performed for no purpose. In other words, energy efficiency is further improved.
- the power source such as the engine 1 and the motor 2 are high temperature portions, and the heat from these portions maintains the engine coolant at a high temperature. Therefore, the temperature difference between the engine coolant and the pump refrigerant is easily increased, and the output from the thermoelectric converter 4 based on the temperature difference is great. Thus, energy recovery based on charging of the battery 7 by the electricity generation is efficiently performed.
- the engine coolant in the engine coolant circuit 11, which cools the engine 1, the motor 2, and the power control unit 6, is used in the electricity generation at the thermoelectric converter 4.
- the present invention may be different from this configuration.
- the coolant of any one of the systems may be used in the electricity generation at the thermoelectric converter 4.
- the pump refrigerant is selectively guided to the thermoelectric converter 4 and the heat exchanger 17.
- the pump refrigerant may be guided to both of the thermoelectric converter 4 and the heat exchanger 17.
- a configuration may be adopted in which the pump refrigerant is guided to both of the thermoelectric converter 4 and the heat exchanger 17 only when the air conditioning demands assistance, and the pump refrigerant is guided only to the thermoelectric converter 4 when there is no such demand.
- the pump refrigerant may be used only for the electricity generation at the thermoelectric converter 4.
- the energy recovery system according to the present invention is applied to a hybrid automobile.
- the energy recovery system may be applied to an automobile that has only one of the engine 1 and the motor 2 as the drive source.
- the energy recovery system may be applied to a vehicle other than an automobile or to any types of apparatuses other than vehicles.
- the heat pump 14 is not necessarily an adsorption heat pump, but may be other types of heat pump such as a mechanical heat pump or an adsorption type chemical heat pump.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Air-Conditioning For Vehicles (AREA)
- Sorption Type Refrigeration Machines (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
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DE602004006248T DE602004006248T2 (en) | 2003-04-17 | 2004-03-29 | ENERGY RECOVERY SYSTEM |
US10/525,508 US7629530B2 (en) | 2003-04-17 | 2004-03-29 | Energy recovery system |
EP04724167A EP1613903B1 (en) | 2003-04-17 | 2004-03-29 | Energy recovery system |
JP2006500399A JP4321587B2 (en) | 2003-04-17 | 2004-03-29 | Energy recovery system |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003112980 | 2003-04-17 | ||
JP2003-112980 | 2003-04-17 |
Publications (1)
Publication Number | Publication Date |
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WO2004092662A1 true WO2004092662A1 (en) | 2004-10-28 |
Family
ID=33296076
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2004/004400 WO2004092662A1 (en) | 2003-04-17 | 2004-03-29 | Energy recovery system |
Country Status (6)
Country | Link |
---|---|
US (1) | US7629530B2 (en) |
EP (1) | EP1613903B1 (en) |
JP (1) | JP4321587B2 (en) |
CN (1) | CN1311209C (en) |
DE (1) | DE602004006248T2 (en) |
WO (1) | WO2004092662A1 (en) |
Cited By (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2414595A (en) * | 2004-05-26 | 2005-11-30 | Denso Corp | Thermoelectric power generating system |
EP1679480A1 (en) * | 2004-12-22 | 2006-07-12 | Denso Corporation | Thermoelectric generator |
WO2007002891A2 (en) * | 2005-06-28 | 2007-01-04 | Bsst Llc | Thermoelectric power generator with intermediate loop |
DE102006040855B3 (en) * | 2006-08-31 | 2008-02-14 | Siemens Ag | Thermo-electric generator, to convert heat into electrical energy, has a cooler to prevent overheating |
DE102006040853B3 (en) * | 2006-08-31 | 2008-02-14 | Siemens Ag | Thermoelectric device for a vehicle comprises a thermoelectric generator, a heat source and a heat sink thermally connected together and units for limiting the temperature in the generator |
WO2009114351A2 (en) * | 2008-03-14 | 2009-09-17 | Gm Global Technology Operations, Inc. | Thermal management for improved engine operation |
WO2011031376A1 (en) * | 2009-08-28 | 2011-03-17 | The Boeing Company | Dual use cooling systems |
CN102756660A (en) * | 2011-04-28 | 2012-10-31 | 吴宸至 | Automobile capable of saving oil by 50 percent |
CN103192676A (en) * | 2012-01-05 | 2013-07-10 | 杭州三花研究院有限公司 | Automobile air condition system |
CN103322655A (en) * | 2013-07-10 | 2013-09-25 | 李志东 | Novel efficient closed-type cycle central air conditioner system with energy used in stepped mode |
WO2013155041A1 (en) * | 2012-04-12 | 2013-10-17 | Magna E-Car Systems Of America, Inc. | Thermal management system and related methods for vehicle having electric traction motor and range extending device |
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Also Published As
Publication number | Publication date |
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EP1613903B1 (en) | 2007-05-02 |
JP2006523813A (en) | 2006-10-19 |
EP1613903A1 (en) | 2006-01-11 |
US7629530B2 (en) | 2009-12-08 |
CN1701209A (en) | 2005-11-23 |
CN1311209C (en) | 2007-04-18 |
DE602004006248T2 (en) | 2007-12-27 |
DE602004006248D1 (en) | 2007-06-14 |
US20050247336A1 (en) | 2005-11-10 |
JP4321587B2 (en) | 2009-08-26 |
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