The F correction factor charts, or the ε-NTU relations all assume that the overall heat transfer coefficient is constant across the heat exchanger. The short lengths and the comparatively thick walls through which heat is conducted in microchannel heat exchangers preclude the existence of thermally fully developed flow over a large portion of the heat exchanger. In this study, a parallel flow heat exchanger is simulated numerically to determine the impact of different parameters on the performance and the accuracy of constant heat transfer coefficient assumption. It is shown that there is significant change in the overall heat transfer coefficient in the developing region and that the three-dimensional heat transfer in the heat exchanger wall must be included in the analysis.
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ASME 2004 Heat Transfer/Fluids Engineering Summer Conference
July 11–15, 2004
Charlotte, North Carolina, USA
Conference Sponsors:
- Heat Transfer Division and Fluids Engineering Division
ISBN:
0-7918-4692-X
PROCEEDINGS PAPER
Numerical Simulation of Heat Transfer in Simultaneously Developing Flows in Parallel Rectangular Ducts
Hussien Al-Bakhit,
Hussien Al-Bakhit
Bradley University, Peoria, IL
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Ahmad Fakheri
Ahmad Fakheri
Bradley University, Peoria, IL
Search for other works by this author on:
Hussien Al-Bakhit
Bradley University, Peoria, IL
Ahmad Fakheri
Bradley University, Peoria, IL
Paper No:
HT-FED2004-56586, pp. 229-234; 6 pages
Published Online:
February 24, 2009
Citation
Al-Bakhit, H, & Fakheri, A. "Numerical Simulation of Heat Transfer in Simultaneously Developing Flows in Parallel Rectangular Ducts." Proceedings of the ASME 2004 Heat Transfer/Fluids Engineering Summer Conference. Volume 3. Charlotte, North Carolina, USA. July 11–15, 2004. pp. 229-234. ASME. https://doi.org/10.1115/HT-FED2004-56586
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