Abstract: An energy-saving system for an air conditioning system includes: a silencer box encasing an air compressor of an air conditioning system and an engine directly coupled with the air compressor, an air heat exchanger adapted for absorbing the heat as laden by an air stream passing the air compressor and the engine, a refrigerant heat exchanger recovering the condensation heat of the air conditioning system, a water heat exchanger recovering the heat as absorbed from the water jacket in an engine body, and a flue gas heat exchanger recovering the waste heat laden in the exhaust gas from the engine, so that all the heat recovered may serve to drive a turbo-generator for power generation, or to warm an utility water or to preheat a boiler feed water.

Abstract: Increases in reactivity can be obtained in thermal and epithermal reactors by utilization of heavy elements in selected locations in the reactors. These increases can result in economic gains, for example, in reduction in the amounts of heavy water needed in heavy water moderated reactors and in reduction of the enrichment needed in light water reactors. A number of examples are provided of advantageous use of the heavy elements in specific reactor embodiments.