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http://dx.doi.org/10.6110/KJACR.2014.26.12.600

Numerical Analysis on Longitudinal Heat Conduction in Printed Circuit Heat Exchanger  

Oh, Dong-Wook (Department of Mechanical Engineering, Chosun University)
Kim, Young (Department of Extreme Thermal Systems, Korea Institute of Machinery and Materials)
Choi, Jun Seok (Department of Extreme Thermal Systems, Korea Institute of Machinery and Materials)
Yoon, Seok Ho (Department of Extreme Thermal Systems, Korea Institute of Machinery and Materials)
Publication Information
Korean Journal of Air-Conditioning and Refrigeration Engineering / v.26, no.12, 2014 , pp. 600-604 More about this Journal
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.
Keywords
Longitudinal heat conduction; Printed circuit heat exchanger; Cryogenic heat exchanger;
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  • Reference
1 Reay, D., Ramshaw, C., and Harvey, A., 2008, Process intensification : Engineering for efficiency, sustainability and flexibility, Butterworth-Heinemann, UK.
2 Pua, L. M. and Rumbold, S. O., 2003, Industrial microchannel devices-Where are we today?, Proceedings, First International Conference on Microchannels and Minichannels, Rochester, NY, USA.
3 Oh, D. W., Yoon, S. H., Kim, D. J., and Choi, J. S., 2011, Numerical analysis in designing microchannel heat exchanger for cryogenic application, Proceedings, International Air-Conditioning and Refrigeration Conference, ICACR 2011, Gangwon-Do, Korea.
4 Shah, R. K. and Sekulic, D. P., 2003, Fundamentals of heat exchanger design, Wiley, Hoboken, NJ.
5 Kroeger, P. G., 1967, Performance deterioration in high effectiveness heat exchangers due to axial heat conduction effect, Advances in Cryogenic Engineering, Vol. 12, pp. 363-372.
6 Maranzana, G., Perry, I., and Maillet, D., 2004, Miniand micro-channels : influence of axial conduction in the walls, International Journal of Heat and Mass Transfer, Vol. 47, No. 17-18, pp. 3993-4004.   DOI