Experiments of Heat Transfer and Pressure Loss in a High-performance Additively Manufactured Modular Microchannel Heat Exchanger
To meet the urgent need of efficiency improvement of micro gas turbines,a high-performance microchannel recuperator suitable for additive manufacturing processing is designed.Based on the basic theory of counter flow heat exchanger and the characteristics of metal additive manufacturing,a modular wavy plate microchannel heat exchanger is designed.The stainless-steel prototype is processed by laser selective melting technology,and tested experimentally.The heat exchanger unit contents 52 microchannels with height of 0.7 mm.The compactness of the prototype reaches more than 1700 m2/m3.The experimental results show that average Nu number increases by 88.9％compared with the traditional flat primary surface heat exchanger under the condition of relative pressure loss less than 2％,and the key performance parameters proves the advancement of this heat exchanger among the existing compact heat exchangers.
microchannel heat exchangeradditive manufacturesteady-state experimentheat transferpressure loss
NETL
NSTL
万方数据
维普
