Natural working fluids for solar-boosted heat pumps

被引：43

作者：

Chaichana, C

Aye, L

Charters, WWS

机构：

[1] Univ Melbourne, Dept Civil & Environm Engn, IDTC, Melbourne, Vic 3010, Australia

[2] Univ Melbourne, Dept Mech & Mfg Engn, Melbourne, Vic 3010, Australia

来源：

INTERNATIONAL JOURNAL OF REFRIGERATION-REVUE INTERNATIONALE DU FROID | 2003年 / 26卷 / 06期

基金：

澳大利亚研究理事会;

关键词：

solar energy; heat pump; refrigerant; rice; replacement; carbon dioxide; propane; propylene; PRESSURE-DROP;

D O I：

10.1016/S0140-7007(03)00046-X

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The option of using natural working fluids as a substitute of R-22 for solar-boosted heat pumps depends not only upon thermal performance and hazardous rating but also on potential impacts on the environment. This paper presents the comparative assessment of natural working fluids with R-22 in terms of their characteristics and thermophysical properties, and thermal performance. Some justification is given for using natural working fluids in a solar boosted heat pump water heater. The results show that R-744 is not suitable for solar-boosted heat pumps because of its low critical temperature and high operational pressures. On the other hand, R-717 seems to be a more appropriate substitute in terms of operational parameters and overall performance. However, major changes in the heat pumps are required. R-290 and R-1270 are identified as candidates for direct drop-in substitutes for R-22. (C) 2003 Elsevier Ltd and IIR. All rights reserved.

引用

页码：637 / 643

页数：7

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