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Energies 2015, 8(9), 10141-10152; doi:10.3390/en80910141

Experimental Research on Water Boiling Heat Transfer on Horizontal Copper Rod Surface at Sub-Atmospheric Pressure

College of Environmental and Energy Engineering, Beijing University of Technology, Beijing 100124, China
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Academic Editor: Chi-Ming Lai
Received: 13 July 2015 / Revised: 24 August 2015 / Accepted: 8 September 2015 / Published: 16 September 2015
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Abstract

In recent years, water (R718) as a kind of natural refrigerant—which is environmentally-friendly, safe and cheap—has been reconsidered by scholars. The systems of using water as the refrigerant, such as water vapor compression refrigeration and heat pump systems run at sub-atmospheric pressure. So, the research on water boiling heat transfer at sub-atmospheric pressure has been an important issue. There are many research papers on the evaporation of water, but there is a lack of data on the characteristics at sub-atmospheric pressures, especially lower than 3 kPa (the saturation temperature is 24 °C). In this paper, the experimental research on water boiling heat transfer on a horizontal copper rod surface at 1.8–3.3 kPa is presented. Regression equations of the boiling heat transfer coefficient are obtained based on the experimental data, which are convenient for practical application. View Full-Text
Keywords: water; sub-atmospheric pressure; boiling heat transfer; regression equation water; sub-atmospheric pressure; boiling heat transfer; regression equation
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MDPI and ACS Style

Yu, L.-H.; Xu, S.-X.; Ma, G.-Y.; Wang, J. Experimental Research on Water Boiling Heat Transfer on Horizontal Copper Rod Surface at Sub-Atmospheric Pressure. Energies 2015, 8, 10141-10152.

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