Combined engine cooling system and waste-heat driven heat pump
An improved engine cooling system is combined with a jet-driven heat pump system for utilizing otherwise wasted heat from an engine to produce refrigeration and heating of cabin, charge air and other media without requiring additional shaft power from the engine. In a closed cycle, vaporized refrigerant fluid is conveyed via jet ejectors from the engine cooling jacket at a high pressure and temperature and from refrigerant evaporators at low pressures and temperatures to a radiator/condenser at an intermediate pressure and temperature. The greater portion of condensed refrigerant fluid is pumped back to the engine (boiler) and the balance is throttled into the evaporators (heat exchangers) to produce an evaporative cooling effect. The vapor resulting therefrom is evacuated by the ejectors and returned to the condenser/radiator. In the cooling mode, the engine jacket constitutes the boiler in a rankine cycle power circuit providing motive fluid power for the jet vapor compressor in a reverse rankine cycle refrigeration circuit incorporating the heat exchangers as cooling coils. In a heating mode the high pressure vapor is conveyed directly from the engine to the heat exchangers which then serve as condensers to provide condensation heating effects, the partially condensed refrigerant being further condensed in the radiator.
- Assignee:
- Daeco Fuels And Engr Co
- Patent Number(s):
- US 4342200
- OSTI ID:
- 6632153
- Resource Relation:
- Patent File Date: Filed date 29 May 1979; Other Information: PAT-APPL-043313
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
INTERNAL COMBUSTION ENGINES
COOLING SYSTEMS
WASTE HEAT UTILIZATION
AUTOMOBILES
HEAT EXCHANGERS
HEAT PUMPS
RANKINE CYCLE POWER SYSTEMS
ENERGY SYSTEMS
ENGINES
HEAT ENGINES
POWER SYSTEMS
VEHICLES
WASTE PRODUCT UTILIZATION
330100* - Internal Combustion Engines
320304 - Energy Conservation
Consumption
& Utilization- Industrial & Agricultural Processes- Waste Heat Recovery & Utilization