水平光滑管内R245fa轴向均匀沸腾传热特性实验研究

doi:10.12052/gdutxb.200014

Abstract

Abstract: R245fa is one of the most commonly working fluids used in organic Rankine cycle (ORC) system. Investigating its heat transfer flow characteristics is of great importance in guiding the design and operation of ORC system. An experimental test rig is established for the test of the in-tube heat transfer and flowing of the organic working fluids. The experimental research for the boiling heat transfer of R245fa in a horizontally smooth tube is conducted. Firstly, the influence of mean quality and mass velocity on the average flow boiling heat transfer coefficient and wall temperature distribution along the tube are obtained and analyzed; then, experimental results are compared with three classical heat transfer correlations prediction results, with an average deviation of 38%, 39%, and 20%. The high temperature evaporation experimental results provide a basic database for the correction of heat transfer correlation and guidance for the engineering design practices.

Key words: organic Rankine cycle, boiling heat transfer, heat transfer correlation, organic working fluids

CLC Number:

TQ021.3

Tu Jun-ping, Huang Ji-kang, Luo Xiang-long, Chen Jian-yong, Yang Zhi, Liang Ying-zong, Chen Ying. An Experimental Study of Axial Uniform Boiling Heat Transfer Characteristics of R245fa in Horizontal Smooth Tube[J].Journal of Guangdong University of Technology, 2020, 37(06): 71-77.

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An Experimental Study of Axial Uniform Boiling Heat Transfer Characteristics of R245fa in Horizontal Smooth Tube

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