thermodynamic analysis and feasibility study of internal combustion engine waste heat recovery to run its refrigeration system

Automobiles refrigeration systems are mainly vapor compression refrigeration systems, and they use high power which is taken directly from the engine. the use of these systems will increase fuel consumption, and this fuel consumption will increase up to 15%. by considering the importance of fuel saving, optimum use of fuel will be necessary. one of the effective ways, is the waste heat recovery from the engine exhaust gas. the purpose of this study is the thermodynamic analysis of a new cogeneration system based on internal combustion engine. in fact, the system will generate power using heat recovery from exhaust the engine, and then the power will be used to run the refrigeration system. the system is used in the actual operating modes of gasoline and diesel engines. different refrigerants are used in the system. results show that the system can generate required refrigeration capacities of both automobiles and buses. furthermore, additional refrigeration capacities will also be available. r245fa and r600 refrigerants have better performances in the system. maximum refrigeration capacity generated by the system is 20 kw when using gasoline engine exhaust gases waste heat recovery, and 130 kw when using diesel engine exhaust gases waste heat recovery.