| Title |
Experimental Study on the Thermal Performance of a Printed Circuit Heat Exchanger in a Cryogenic Environment |
| Authors |
Dong Ho Kim ; Sang Jun Na ; Young Kim ; Jun Seok Choi ; Seok Ho Yoon |
| DOI |
http://dx.doi.org/10.6110/KJACR.2015.27.8.426 |
| Keywords |
인쇄기판형 열교환기 ; 극저온 열교환기 ; 열전달 상관식 Printed circuit heat exchanger ; Cryogenic heat exchanger ; Heat transfer correlation |
| Abstract |
The advantages of a printed circuit heat exchanger (PCHE) are the compactness and efficiency derived from its heat-transfer characteristics; furthermore, a PCHE for which a diffusion bonding method was used during production can be applied to extreme environments such as a cryogenic condition. In this study, a micro-channel PCHE fabricated by diffusion bonding was investigated in a cryogenic environment regarding its thermal performance and the pressure drop. The test rig consists of an LN2 storage tank, vaporizers, heaters, and a cold box, whereby the vaporized cryogenic nitrogen flows in hot and cold streams. The overall heat-transfer coefficients were evaluated and compared with traditional correlations. Lastly, we suggested the modified heat-transfer correlations for a PCHE in a cryogenic condition. |