Feasibility study of using bleeded air from a turbocharger system for airconditioning purposes has been performed. An integrated unit which comprises a Diesel reciprocating engine, a turbocharger system, a basic open air refrigeration cycle, and an auxiliary combustion chamber was “theoretically analyzed. A detailed mathematical model has been developed and used to simulate the integrated unit. This includes models of the turbine and compressor performance maps, combustion and heat transfer phenomena, and characteristics of the heat-exchangers. The model has been calibrated by using some available experimental data, and used to study the effect of bleeding air from the turbocharger system on the performance map of the propulsion unit.