Novel self-adaptive circulating cooling system for marine diesel engine

The invention discloses a marine diesel engine novel self-adaptive circulating cooling system which comprises a diesel engine, a fresh water pump, a sea water pump, a cooling water thermostat, an air cooler, a flow regulating valve I and a flow regulating valve II. The fresh water pump is installed on one side of the transmission end of the diesel engine, and the sea water pump is installed on the other side of the transmission end of the diesel engine; the novel self-adaptive circulating cooling system for the marine diesel engine further comprises a double-outlet high-temperature and low-temperature heat exchanger, the air cooler is installed at the output end of the diesel engine and used for heat exchange between pressurized air and cooling water, and the double-outlet high-temperature and low-temperature heat exchanger is installed at the side body position of the diesel engine. The air cooler is guaranteed to have enough cooling water flow, the cooling water temperature is guaranteed to meet the require