Three-dimensional Numerical Analysis of In-line Plate Finned-tube Heat Exchangers

• Main Authors: Kuo-ChiangHu, 胡國強
• Other Authors: Han-Taw Chen
• Format: Others
• Language: zh-TW
• Published: 2012
• Online Access: http://ndltd.ncl.edu.tw/handle/73840515248861476615

碩士 === 國立成功大學 === 機械工程學系專班 === 100 === The present study applies the Three-dimensional numerical analysis methods to predict the average heat transfer coefficient and heat transfer coefficient under the isothermal situation on a vertical square fin of the two-tube plate finned-tube heat exchangers for in-line arrangements and various fin spacings . And further with compare the numerical inverse scheme with the experimental data in the literature to predict the average heat transfer coefficient and heat transfer coefficient under the isothermal situation . In additions, the present study also applies the commercial software ‘Icepak’in conjunction with the present experimental data to obtain the inter-fin flow field of the plate finned-tube heat exchanger and temperature measurements at various measurement locations of the fin. Results show that and in nature convection increase with increasing the fin spacing S. These values can respectively approach their corresponding asymptotic values obtained from a single square fin as S . However, and in mixed convection increase with increasing the S and air velocity. Furthermore, in order to prove the reliability of the present heat transfer coefficient under the isothermal situation results . Compared with some of the experimental formula and inverse scheme results can be obtained to verify their accuracy and reasonableness.