Effect of ambient temperature on the performance of micro gas turbine with cogeneration system in cold region

► Micro gas turbine cogeneration system (MGT-CGS) has higher electrical efficiency and lower exhaust heat recovery efficiency under cold condition. ► MGT-CGS has lower exhaust heat and exhaust heat recovery to power ratio under cold condition. ► The performance of MGT-CGS depends on heat and electrical demands of applied facilities, and it can decide the necessity of inlet precooling. ► MGT-CGS is very efficient on total energy efficiency, fuel saving and CO2 reduction.