COOLING SYSTEM OF AUXILIARY POWER UNIT

摘要

An auxiliary power unit cooling system is provided to preheat a main power unit with coolant heated with an auxiliary power unit by forming a third coolant line connecting a main power unit and an auxiliary power unit. An auxiliary power unit cooling system comprises: a first cooling unit(300) which is driven with a main power unit(100); a first coolant line(L1) passing through the main part power unit and the first cooling unit; a second cooling unit(400) driven with an auxiliary power unit(200); a second coolant line(L2) passing through the auxiliary power unit, and the second cooling unit and the first cooling unit; and a control unit(800) operating the second cooling unit in case the main power unit and the first cooling unit do not operate.