Numerical Analysis of Heat Transfer in the Concentric Heat Exchanger

Abstract:

The computational fluid dynamics (CFD) software is used to compute three-dimensional concentric heat exchanger in this research. In order to reduce the burden of the computational time, the concentric heat exchanger is simplified sector of 5° for the regular arrangement of internal shape. The working fluids for hot flow and cold flow are helium and molten salt individually. The arrangements for hot and cold flow paths within a heat exchanger is opposite. This study is mainly focused on the distribution of field for the two layers of concentric heat exchanger. The width of the flow channel as well as the length, pitch, thickness and angle of fin have been changing to analyze the effectiveness-NTU method. The results showed that the best heat transfer of fin thickness, angle, space, length, and flow channel are under 5mm, 5°, 8mm, 44mm, and 12mm, respectively.

• Periodical: Applied Mechanics and Materials (Volumes 275-277)
• Pages: 572-575
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.275-277.572
• Online since: January 2013
• Authors: Hung Chien Chen, Tzu Chen Hung, Yi Feng Chen
• Keywords: Computational Fluid Dynamics (CFD), Counter Flow, Effectiveness-NTU, Heat Exchanger

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