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This paper, describes an attempt to calculate the amount of specific net work, efficiency and also heat energy available in the exhaust gases of a turbocharged Spark Ignition engine (ideal cycle) that can be interfaced with an absorption refrigeration unit. The working fluid is taken to be air. Based on the thermodynamics laws the variation of specific net work and efficiency of the engine as a function of the cycle volume ratio, cycle temperature ratio and compressor pressure ratio are calculated. Then by writing a heat balance equation for the cycle the amount of heat available in the exhaust gases is determined.

The utilization of the exhaust waste heat from engines is now well known and form the basis of many combined heat and power installations. The combination of a thermal power cycle and a refrigerant cycle, however, been the subject of little interest in the past. The paper explores from a theoretical stand point the possibility of utilization of the exhaust gases of a turbocharged Diesel engine as an energy input to a vapor absorption refrigeration system for producing a cooling effect for the combination of pre and inter cooling of the charge air, which is a modified form of the intercooling systems.