| Title |
Numerical Analysis on Longitudinal Heat Conduction in Printed Circuit Heat Exchanger |
| Authors |
오동욱(Dong-Wook Oh) ; 김영(Young Kim) ; 최준석(Jun Seok Choi) ; 윤석호(Seok Ho Yoon) |
| DOI |
http://dx.doi.org/10.6110/KJACR.2014.26.12.600 |
| Keywords |
유동방향 전도열전달 ; 인쇄기판형 열교환기 ; 극저온 열교환기 Longitudinal heat conduction ; Printed circuit heat exchanger ; Cryogenic heat exchanger |
| Abstract |
Longitudinal heat conduction is known to be an important factor in the design of a printed circuit heat exchanger(PCHE) for cryogenic applications. Parasitic heat conduction through the heat exchanger frame needs to be considered because it is known to decrease the effectiveness of the heat exchanger. In this paper, a conjugate heat transfer problem in a simple counter-flow PCHE is analyzed by a computational fluid dynamics simulation. The effect of longitudinal conduction in a straight channel is compared with the theoretical effectiveness-NTU relationship that assumes a "thin" heat exchanger frame. The calculation results suggest that the theoretical model is valid in the present calculation conditions where NTU is < 13. |