Performance study of a photovoltaic solar assisted heat pump with variable-frequency compressor - A case study in Tibet

被引：73

作者：

Liu Keliang ^{[1
]}

Ji Jie ^{[1
]}

Chow Tin-tai ^{[2
]}

Pei Gang ^{[1
]}

He Hanfeng ^{[1
]}

Jiang Aiguo ^{[1
]}

Yang Jichun ^{[1
]}

机构：

[1] Univ Sci & Technol China, Dept Thermal Sci & Energy Engn, Hefei 230026, Peoples R China

[2] City Univ Hong Kong, Div Bldg Sci & Technol, Kowloon, Hong Kong, Peoples R China

来源：

RENEWABLE ENERGY | 2009年 / 34卷 / 12期

关键词：

Photovoltaic solar assisted heat pump; Coefficient of performance; Photovoltaic efficiency; Variable-frequency compressor; COLLECTORS;

D O I：

10.1016/j.renene.2009.04.031

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The performance of a photovoltaic solar assisted heat pump (PV-SAHP) with variable-frequency compressor is reported in this paper. The system is a direct integration of photovoltaic/thermal solar collectors and heat pump. The solar collectors extract the required thermal energy from the heat pump and at the same time, the cooling effect of the refrigerant lowers the working temperature of the solar cells. So this combined system has a relatively high thermal performance with an improved photovoltaic efficiency. To adapt to the continuously changing solar radiation and ambient temperature conditions, the refrigerant mass flow rate should match the heat gain at the evaporator accordingly. A variable-frequency compressor and an electricity-operated expansion valve were used in the proposed system. Mathematical models were developed to evaluate the energy performance of the combined system based on the weather conditions of Tibet. The simulation results indicated that on a typical sunny winter day with light breeze, the average COP could reach 6.01, and the average electricity efficiency, thermal efficiency and overall efficiency were 0.135, 0.479 and 0.625 respectively. (C) 2009 Elsevier Ltd. All rights reserved.

引用

页码：2680 / 2687

页数：8

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