Effects of Evaporation Temperature on Nucleate Pool Boiling Heat Transfer Characteristics Outside the Enhanced Tube

Ouyang Xinping; Bao Linlin; Qiu Xuesong

doi:10.3969/j.issn.0253-4339.2015.01.097

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Effects of Evaporation Temperature on Nucleate Pool Boiling Heat Transfer Characteristics Outside the Enhanced Tube

更新时间：2024-07-18

- Effects of Evaporation Temperature on Nucleate Pool Boiling Heat Transfer Characteristics Outside the Enhanced Tube
- Journal of Refrigeration Vol. 36, Issue 1, (2015)
- 作者机构：
  
  上海理工大学制冷与低温工程研究所
- 作者简介：
- 基金信息：
- DOI：10.3969/j.issn.0253-4339.2015.01.097
  CLC：
- Published：2015
- 稿件说明：
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Ouyang Xinping, Bao Linlin, Qiu Xuesong. Effects of Evaporation Temperature on Nucleate Pool Boiling Heat Transfer Characteristics Outside the Enhanced Tube[J]. Journal of refrigeration, 2015, 36(1).
DOI：

Ouyang Xinping, Bao Linlin, Qiu Xuesong. Effects of Evaporation Temperature on Nucleate Pool Boiling Heat Transfer Characteristics Outside the Enhanced Tube[J]. Journal of refrigeration, 2015, 36(1). DOI： 10.3969/j.issn.0253-4339.2015.01.097.

摘要

对R134a在水平强化管(Φ25 mm)外核态池沸腾进行了实验研究。通过Wilson图解法求得管内换热准则关系式，通过改变蒸发温度(5.6 ℃，0 ℃，-2 ℃，-4 ℃，-6 ℃，-8 ℃)和热流密度(4~55 kW/m2)，得到了管外沸腾换热系数随热流密度和蒸发温度变化的规律。实验表明，管外沸腾换热系数随着热流密度和蒸发温度的升高而增加。结合实验数据，提出了一个新的管外池沸腾换热关联式，该关联式与实验数据点的偏差显示，95%的数据点的相对误差在±20%以内。

Abstract

Nucleate pool boiling outside the horizontal enhanced tube (Φ25 mm) with the refrigerant R134a was experimentally investigated. The inner heat transfer correlation has been obtained by using Wilson graphic method. Experiments were performed at evaporation temperatures of 5.6

-2

-4

-6 and -8 ℃

heat fluxes from 4 to 55 kW/m2. Experimental results show that the pool boiling heat transfer coefficient outside the tube increases with the increase of heat flux and evaporation temperature. A new heat transfer correlation of pool boiling has been put forward. By comparison with test data

the relative deviation of 95% of the correlation value is within ± 20%.

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Related Institution

Institute of Refrigeration and Cryogenics, Shanghai Jiao Tong University

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Institute of Refrigeration and Cryogenics, Shanghai Jiao Tong University

University of Shanghai for Science and Technology

Inst. of Refrigeration and Cryogenics Eng., Shanghai Jiao Tong Univ

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