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强化传热期刊
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ISSN 打印: 1065-5131
ISSN 在线: 1026-5511

强化传热期刊

DOI: 10.1615/JEnhHeatTransf.2017019216
pages 23-46

EFFECT OF SURFACE VIBRATION ON FLOW BOILING HEAT TRANSFER OF R-600A IN A CIRCULAR TUBE WITH METALLIC POROUS INSERTS

Mao-Yu Wen
Department of Mechanical Engineering, Cheng Shiu University, Kaohsiung 833, Taiwan, ROC
Ching-Yen Ho
Department of Mechanical Engineering, Hwa Hsia University of Technology, Taipei 235, Taiwan, ROC
Cheng-Hsiung Yeh
Department of Mechanical Engineering, Cheng Shiu University, Kaohsiung 833, Taiwan, ROC

ABSTRACT

This investigation was undertaken in order to better understand the characteristics of the subcooled flow boiling heat transfer and pressure drop of a hydrocarbon refrigerant, R-600a (isobutane), flowing in a circular pipe within dispersed-copper porous inserts under surface vibration. The test was conducted at a saturation temperature of 10°C, in which the vapor qualities were from 0.076 to 0.92. The mass and heat fluxes were shown to be 113–1106 kg/m2s and 12–65 kW/m2, respectively. The effects of surface vibration, mass flux, heat flux, vapor quality, and insert geometry (i.e., porosity, mean pore diameters, and permeability) on the heat transfer and pressure drop of R-600a are presented.


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