Microchannel Heat Exchanger Encyclopedia

Micro-Channel Heat Exchanger Encyclopedia

Working principle

PCHE is a compact heat exchanger formed by diffusion welding of multilayer microchannel plates using printed circuit board etching technology. Printed circuit board heat exchanger (PCHE) is a kind of heat exchanger in which metal plates are processed by electrochemical etching process into heat exchange plates with a certain structure, which are stacked together by diffusion welding. Micro channels are formed between the various plates, and the working fluid flows through the micro channels formed between the two plates.

Production process

In a vacuum environment, the welded parts are tightly bonded and kept under a certain temperature and pressure for a period of time. A welding method that makes the atoms between the contact surfaces diffuse into one body.

Technical Features

The microchannel heat exchanger (PCHE) has a small volume (1/9 of the volume of the tube type, 1/6 of the plate exchange, and 1/3 of the plate fin), light weight (1/10 of the weight of the tube type, and 1/3 of the plate fin). 1/4 of the plate-fin and 1/3 of the plate-fin), high strength (50 times the pressure resistance of the plate-exchange and plate-fin type), high heat transfer efficiency (4 times that of the plate-exchange plate-fin type), low leakage It has the advantages of high efficiency, no solder, strong corrosion resistance, and high reliability of the weld.

Application field

Due to its high compactness, small volume, and high pressure resistance, microchannel heat exchangers are widely used in laser cooling, precision instruments, medical equipment, aerospace and other fields.

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