Heat Transfer Analysis and Estimation of CHF in Vertical Channel
Publish Year: 1398
نوع سند: مقاله ژورنالی
زبان: English
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شناسه ملی سند علمی:
JR_JADSC-2-1_003
تاریخ نمایه سازی: 15 مهر 1402
Abstract:
Heat transfer occurs in flow boiling; as a result, the amount of heat between the tube wall surface and the fluid at different points of the tube may vary depending on the volume percent of vapor at those points. If the flow is fully vaporized, it does not allow for perfect heat transfer at that point; this significantly increases the temperature there; in this case the applied heat flux is called critical heat flux (CHF). The present paper has focused its attentions on simulating a two-phase fluid flow within the CHF range using ANSYS Fluent. The simulation results indicated an average error below ۷%, which is more than those obtained by the experimental results. The maximum temperature of the tube surface when applying CHF could range between ۲۰۰ and ۵۰۰ K degrees more than that of fluid saturation according to the fluid working conditions. It also should be noted that both CHF and maximum temperature increase as the input pressure and mass flux do increase.
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Authors
K. Dolati Asl
Department of Mechanical Engineering, University of Hormozgan, Bandar Abbas,, Iran
E. Abedini
Department of Mechanical Engineering, University of Hormozgan, Bandar Abbas,, Iran
Y. Bakhshan
Department of Mechanical Engineering, University of Hormozgan, Bandar Abbas,, Iran
A. Mohammadi Karachi
Department of Mechanical Engineering, University of Hormozgan, Bandar Abbas,, Iran.
R. Hamidi Jahromi
Department of Mechanical Engineering, University of Hormozgan, Bandar Abbas,, Iran.