Impact of N-Structure Geometry on Heat Transfer in a Microchannel Heat Exchanger

A new microchannel heat exchanger with N-structure is proposed to balance the heat transfer performance and pressure drop. A straight channel section equal to the wavelength of the continuous wave microchannel is added to create an N-structure microchannel. The relationship between different N-structures of the microchannel and the heat transfer performance as well as the structural influence of the N-structure on heat transfer characteristics are investigated. The performance of the microchannel is affected by the arrangement of wave channel sections in the N-structure. The symmetrical N-structure has the best heat transfer effect. The pressure drop between the inlet and outlet of the cold side is mainly influenced by the structure of the microchannel. A superior transfer performance is associated with the pressure drop.

Automated summary

The study focused on the heat transfer performance and structural influence of N-structure microchannel heat exchangers. The arrangement of wave channel sections in the N-structure significantly affects the performance of the microchannel heat exchanger. The symmetrical N-structure was found to have the best heat transfer effect.