Microchannels, also known as microchannel heat exchangers, are heat exchangers with a channel equivalent diameter of 10-1000 μm. There are dozens of fine flow passages in the flat tube of this heat exchanger, which are connected to the circular header at both ends of the flat tube. A partition is provided in the header to divide the heat exchanger flow path into several processes.

Advantages of microchannels: (1) rapid reaction; (2) high selectivity; (3) high yield; (4) high safety.