Development of highly effective cryogenic printed circuit heat exchanger (PCHE) with low axial conduction

作者：Baek Seungwhan^*; Kim Jin Hyuck; Jeong Sangkwon; Jung Jeheon

来源：Cryogenics, 2012, 52(7-9): 366-374.

DOI：10.1016/j.cryogenics.2012.03.001

• Printed circuit heat exchanger (PCHE)
• Pressure drop
• Ineffectiveness
• Axial conduction

This paper presents the results of an experimental investigation of the thermal and hydraulic performance of a printed circuit heat exchanger (PCHE) for use in the cryogenic temperature region. Compact PCHEs with multiple corrugated, longitudinal flow microchannels were fabricated using chemical etching and diffusion bonding to evaluate their thermal and hydraulic performance. The testing of the PCHEs was conducted with helium gas at cryogenic temperatures. The pressure drop and thermal effectiveness values obtained from the measured pressures and temperatures are discussed. The thermal performance was predominantly affected by the axial conduction heat transfer in the low Reynolds number ranges of theses experiments. A simple performance calculation model is presented, and the effectiveness calculated from the model is compared with the experimental data. The design of the cryogenic PCHE was then modified to reduce axial conduction losses.

• 出版日期2012-9