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Performance Simulation Study of Multi-structure Louver Fins in Parallel Flow Condenser

Author: WangFuBao
Tutor: ChenHuanXin
School: Huazhong University of Science and Technology
Course: Refrigeration and Cryogenic Engineering
Keywords: multi-structure louver fins parallel flow condenser domestic air-conditioner heat transfer coefficient pressure drop
CLC: TK124
Type: Master's thesis
Year: 2009
Downloads: 69
Quote: 0
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Abstract


Because of the good performance of heat exchang and compact conformation, louver fins have been widely used in a variety of heat sinks. Based on the domestic related research, it was mainly concentrated in the analysis of flow field and effects of structural parameters. The pervious approach has been confined to the open-window louver fins, and the mold of such construction form was obtained largely from abroad, with no patents at home. Therefore, it is of great practical significance to developt a new type of louver fin. In this paper, the heat transfer characteristics and flow properties on the development of six new structures of louver fins are compared together and the best method is proposed on the regional division with the numerical simulation methods.To verify the feasibility and validity of fin model and computational method, numerical calculation results are compared with some empirical correlations and typical experimental results at first. The error value of coefficient of heat transfer and press drop are both found to be within the acceptable range.Based on the numerical calculation , six cases for the regional division with different structural parameters of multi-fin blinds are considered, and the flow and temperature field are analyzed comparatively in detail. The results of the heat transfer coefficient of louver fins numbered 1 to 6 respectively are showed as : 142.4, 144.5, 147.3, 156.3, 155.9, and 158.3 W/(m2?k), with the face velocity of 2.5m/s. Therefore, No.6 fin is the best in heat transfor performance than others.Finally, on the basis of no. 6 model, the influence of the three parameters, such as spacing of fins, angle, and pitch for louvers, on the heat transfer and flow properties, is studied by comparing the heat transfer coefficient and pressure drop.Present work can provide a theoretical basis and guiding principles for the practical applications of multi-structure louver fins.

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CLC: > Industrial Technology > Energy and Power Engineering > Thermal engineering, heat > Thermal Engineering Theory > Heat Transfer
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