Abstract: Refrigeration apparatus for cooling inlet air for an internal combustion engine uses waste heat from the engine exhaust to heat a mixture of bis(2-methoxyeth oxyethyl)ether and chlorodifluoromethane to drive off the latter component into a flow path extending through a condenser, an expander and evaporators where it removes heat from the inlet air prior to being compressed and returned to be reabsorbed in the mixture in an absorber where heat is rejected. The said flow path includes heat exchanges to improve the thermal efficiency.

Abstract: The air supplied to an internal combustion engine is cooled by a refrigeration process powered either by power generated by the engine or by heat from the exhaust gases. Multi-stage cooling may be used in conjunction with a separator for removing condensed ice particles from the cooled air. The engine may be a gas turbine or a reciprocating engine and the latter may be turbo-charged or super charged.