Three Dimensional Numerical Simulation of Convection-Condensation of Vapor with High Concentration Air in Tube with Inserts

Chin.J.Chem.Eng. ›› 2012, Vol. 20 ›› Issue (4): 686-692.

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Three Dimensional Numerical Simulation of Convection-Condensation of Vapor with High Concentration Air in Tube with Inserts

CUI Yongzhang¹, TIAN Maocheng², ZHANG Linhua¹, LI Guangpeng¹, ZHU Jianbin¹

1. Key Laboratory of Building Energy Conservation Technique of Shandong Province, School of Thermal Engineer-ing, Shandong Jianzhu University, Jinan 250101, China;
2. School of Energy & Power Engineering, Shandong University, Jinan 250061, China

Received:2011-06-30 Revised:2012-02-07 Online:2012-09-15 Published:2012-08-28
Supported by:
Supported by the Technology Development Program of Jinan City (201102039,201202087);the Technology Development Program of Shandong Province (2011GNC11401)

Three Dimensional Numerical Simulation of Convection-Condensation of Vapor with High Concentration Air in Tube with Inserts

崔永章¹, 田茂诚², 张林华¹, 李广鹏¹, 朱建宾¹

1. Key Laboratory of Building Energy Conservation Technique of Shandong Province, School of Thermal Engineer-ing, Shandong Jianzhu University, Jinan 250101, China;
2. School of Energy & Power Engineering, Shandong University, Jinan 250061, China

通讯作者: CUI Yongzhang, E-mail:cyz@sdjzu.edu.cn
基金资助:
Supported by the Technology Development Program of Jinan City (201102039,201202087);the Technology Development Program of Shandong Province (2011GNC11401)

Abstract

Abstract: A three-dimensional numerical model is presented for studying the convection-condensation of mixture with vapor in a tube with edgefold-twisted-tape inserts under transition flow.According to the diffusion layer theory and laminar species transport,a condensation model with user defined function is proposed and compared with heat and mass transfer analogy and experimental test.With the condensation model,the influences of gap width and operating parameters on thermal-hydrodynamics performance are simulated.As the gap width increases,convection and condensation heat transfer increase initially and then decrease,while convection heat transfer increases sharply and then decreases slightly.Increasing vapor fraction has a significant effect on condensation heat transfer but it has little effect on convective heat transfer.With the increase of inner wall temperature both convection and condensation heat transfer all decrease and the ratio of condensation to total heat decrease dramatically.Increases inlet temperature mainly affects convection heat transfer.

Key words: condensation model, numerical simulation, transition flow

摘要： A three-dimensional numerical model is presented for studying the convection-condensation of mixture with vapor in a tube with edgefold-twisted-tape inserts under transition flow.According to the diffusion layer theory and laminar species transport,a condensation model with user defined function is proposed and compared with heat and mass transfer analogy and experimental test.With the condensation model,the influences of gap width and operating parameters on thermal-hydrodynamics performance are simulated.As the gap width increases,convection and condensation heat transfer increase initially and then decrease,while convection heat transfer increases sharply and then decreases slightly.Increasing vapor fraction has a significant effect on condensation heat transfer but it has little effect on convective heat transfer.With the increase of inner wall temperature both convection and condensation heat transfer all decrease and the ratio of condensation to total heat decrease dramatically.Increases inlet temperature mainly affects convection heat transfer.

关键词: condensation model, numerical simulation, transition flow

CUI Yongzhang, TIAN Maocheng, ZHANG Linhua, LI Guangpeng, ZHU Jianbin. Three Dimensional Numerical Simulation of Convection-Condensation of Vapor with High Concentration Air in Tube with Inserts[J]. Chin.J.Chem.Eng., 2012, 20(4): 686-692.

崔永章, 田茂诚, 张林华, 李广鹏, 朱建宾. Three Dimensional Numerical Simulation of Convection-Condensation of Vapor with High Concentration Air in Tube with Inserts[J]. Chinese Journal of Chemical Engineering, 2012, 20(4): 686-692.

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Three Dimensional Numerical Simulation of Convection-Condensation of Vapor with High Concentration Air in Tube with Inserts

Three Dimensional Numerical Simulation of Convection-Condensation of Vapor with High Concentration Air in Tube with Inserts

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