Heating Performance of Zeotropic Mixture and Temperature Glide Matching with Secondary Fluid

Abstract:

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In order to decrease the heat rejection pressure of pure CO2 refrigerating system and meanwhile have sustainable environmentally benefits for working fluild, several natural zeotropic CO2/Propane mixtures are applied to heat pump system to investigate the heating performance. The heat rejection pressure of CO2/Propane mixtures is reduced when the mass fraction of carbon dioxide is decreased. Under the given conditions, there is an optimum range of mass fraction of CO2/Propane of which the mixtures have superior heating coefficient of performance. The temperature glide characteristics of CO2/Propane mixtures at heating mode was also researched to analyze the heat transfer efficiency. Both a sufficient heat exchange area and a good working fluid’s temperature gradient matching with that of the secondary heat transfer fluid contribute to a higher heat transfer efficiency of heat exchanger.

Info:

Periodical:

Key Engineering Materials (Volumes 474-476)

Edited by:

Garry Zhu

Pages:

1657-1660

DOI:

10.4028/www.scientific.net/KEM.474-476.1657

Citation:

X. P. Zhang et al., "Heating Performance of Zeotropic Mixture and Temperature Glide Matching with Secondary Fluid", Key Engineering Materials, Vols. 474-476, pp. 1657-1660, 2011

Online since:

April 2011

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Price:

$35.00

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