WASTE HEAT REGENERATION SYSTEM

A waste heat regeneration system includes a pump, a coolant boiler, an exhaust gas boiler, an expander, a first condenser, a gas/liquid separator, and a supercooler. A first flow control valve adjusts the amount of an operating fluid circulating in a first bypass flow path by controlling its opening degree based on a pressure difference P1-P2 corresponding to a temperature difference T1-T2 between the temperature T1 of the operating fluid on the upstream side of the supercooler and the temperature T2 of the operating fluid on the downstream side thereof, thereby maintaining the temperature difference T1-T2 so as to be larger than or equal to a predetermined value necessary for preventing the generation of cavitation in the pump, and ensuring the degree of supercooling.