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Heat Pipe Heat Exchanger

Air to air heat pipe heat exchanger is mainly used to heat air with the energy from the exhaust gas. Heat pipe is composed of a shell and the working fluid, shell is evacuated and the working fluid is sealed in the shell. The heat pipe is divided into the evaporator section and condenser section.

 

The heat pipe is filled with a small quantity of working fluid (water, acetone, nitrogen, methanol, ammonia or sodium). Heat is absorbed by vaporizing the working fluid. The vapor transports heat to the condenser section where the condensed vapor releases heat to a cooling medium. The condensed working fluid is returned to the evaporator by gravity, or by the heat pipe's wick structure, creating capillary action.