Combined engine cooling system and waste-heat driven heat pump

Patent · Tue Aug 03 04:00:00 EDT 1982

OSTI ID:6632153

Lowi, A J

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
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
320304 -- Energy Conservation
Consumption
& Utilization-- Industrial & Agricultural Processes-- Waste Heat Recovery & Utilization
33 ADVANCED PROPULSION SYSTEMS
330100* -- Internal Combustion Engines
AUTOMOBILES
COOLING SYSTEMS
ENERGY SYSTEMS
ENGINES
HEAT ENGINES
HEAT EXCHANGERS
HEAT PUMPS
INTERNAL COMBUSTION ENGINES
POWER SYSTEMS
RANKINE CYCLE POWER SYSTEMS
VEHICLES
WASTE HEAT UTILIZATION
WASTE PRODUCT UTILIZATION