| 摘要 |
<p>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.</p> |
