Condensation heat transfer and pressure drop characteristics inside smooth and enhanced tubes with R410A and R32

被引：8

作者：

Li, Wei ^{[1
,2
]}

Feng, Wei ^{[1
]}

Liu, Xiangzeng ^{[1
]}

Li, Junye ^{[3
]}

Cao, Biqi ^{[4
]}

Dou, Binlin ^{[5
]}

Zhang, Jianghui ^{[1
]}

Kukulka, David John ^{[6
]}

机构：

[1] Qingdao Univ Sci & Technol, Dept Mech & Elect Engn, Qingdao 266061, Peoples R China

[2] Zhejiang Univ, Dept Energy Engn, 38 Zheda Rd, Hangzhou 310027, Peoples R China

[3] ZJU Hangzhou Global Sci & Technol Innovat Ctr, Hangzhou 311200, Peoples R China

[4] Zhejiang Univ, Coll Elect Engn, 38 Zheda Rd, Hangzhou 310027, Peoples R China

[5] Univ Shanghai Sci & Technol, Sch Energy & Power Engn, Shanghai 200093, Peoples R China

[6] SUNY Buffalo, 1300 Elmwood Ave, Buffalo, NY 14222 USA

来源：

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER | 2023年 / 214卷

基金：

美国国家科学基金会;

关键词：

Condensation; Heat transfer; Enhanced tube; Flow patterns; R32; MICRO-FIN TUBES; HORIZONTAL SMOOTH; FLOW CONDENSATION; TRANSFER COEFFICIENTS; REFRIGERANTS; R22; HERRINGBONE; R407C;

D O I：

10.1016/j.ijheatmasstransfer.2023.124419

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

An experimental investigation was performed to evaluate the condensation heat transfer characteristics for R32 and R410A inside four horizontal round tubes with 12.7 mm outer diameter. The saturation temperatures were 35 & DEG;C and 45 & DEG;C, the vapor qualities ranged from 0.2 to 0.8, and the mass flux ranged from 50 kg m-2 s -1 to 200 kg m-2 s -1. Different inside surface structures of the four tubes were smooth (ST), hydrophobic (HYD), herringbone (HB) and hydrophobic/herringbone (HYD/HB), respectively. Effects of mass flux, vapor quality, refrigerant and saturation temperature on condensation heat transfer in different tubes were discussed with the aid of flow pattern visualizations. Experimental results show that the heat transfer coefficient of R32 was higher than that of R410A due to different physical properties of the refrigerant. HB tube had the highest heat transfer coefficient at low vapor quality and HYD tube was the best at high vapor quality. The performance enhancement factors (PEF) of HB tube and HYD tube were better, ranging from 1.07 to 1.4 and from 1.02 to 1.31, respectively. However, as the composite of HB and HYD, the HYD/HB tube had the lowest overall performance, with the PEF ranged from 0.94 to 1.12. Additionally, the specific sensitivity factor (SSF) was used to evaluate the influence of various parameters on heat transfer and pressure drop.(C) 2023 Published by Elsevier Ltd.

引用

页数：14

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