IMMERSED LIQUID-COOLING SERVER AND WASTE HEAT RECOVERY SYSTEM THEREOF

A waste heat recovery system, which relates to the technical field of servers. The system comprises an immersion tank, an evaporation tank, a heat exchanger, a circulation pipe, and a first drive assembly, wherein the immersion tank holds a single-phase coolant inside; the evaporation tank holds a two-phase coolant inside, and is provided with an extension portion that extends into the immersion tank and is in contact with the single-phase coolant; a water inlet and a water outlet of the heat exchanger are respectively in communication with different parts of the immersion tank; the pipe orifice of one end of the circulation pipe is in communication with the bottom of the evaporation tank, and the pipe orifice of the other end of the circulation pipe is in communication with the top of the evaporation tank; and the first drive assembly comprises a first driving impeller, a first driven impeller, and a first transmission component, which are mounted in the circulation pipe. Heat of the server is used as power,