Performance Evaluation of Short Parabolic Trough Collectors Integrated with a Small-Scale Solar Power and Heating System

doi:10.1007/s12204-018-2021-y

Journal of Shanghai Jiao Tong University (Science) ›› 2018, Vol. 23 ›› Issue (Sup. 1): 41-49.doi: 10.1007/s12204-018-2021-y

Performance Evaluation of Short Parabolic Trough Collectors Integrated with a Small-Scale Solar Power and Heating System

ZHANG Guang (张光), LI Yong (李勇)

(School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China)

发布日期:2018-12-26
通讯作者: ZHANG Guang (张光) E-mail:0535jim@sjtu.edu.cn

Performance Evaluation of Short Parabolic Trough Collectors Integrated with a Small-Scale Solar Power and Heating System

ZHANG Guang (张光), LI Yong (李勇)

(School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China)

Published:2018-12-26
Contact: ZHANG Guang (张光) E-mail:0535jim@sjtu.edu.cn

摘要/Abstract

摘要： An investigation is presented on the performance of a small-scale solar power and heating system with short parabolic trough collectors (PTCs). The steady-state model of the short PTCs is evaluated with outside experiments. The model mainly contains the heat loss of the receiver, the peak optical efficiency and the incident angle factor consisting of incident angle modifier and end loss. It is found that the end loss effect is essential in this model when the length of the PTCs is less than 48 m, especially in the winter. The standard deviation of the steady-state model is 1.4%. Moreover, the potential energy efficiency ratio of the solar power and heating system is considerably larger than the coefficient of performance (COP) of general air-source heat pumps, and increases with the decrease of the condensation temperature. An overall system efficiency of 49% can be reached. Lastly, the existence of a water storage tank improves the flexibility of heating the building, and the volume of the water storage tank decreases with the increase of the heating water temperature.

关键词: parabolic trough solar collector , small-scale , practical operating characteristics , thermal performance , testing method

Abstract: An investigation is presented on the performance of a small-scale solar power and heating system with short parabolic trough collectors (PTCs). The steady-state model of the short PTCs is evaluated with outside experiments. The model mainly contains the heat loss of the receiver, the peak optical efficiency and the incident angle factor consisting of incident angle modifier and end loss. It is found that the end loss effect is essential in this model when the length of the PTCs is less than 48 m, especially in the winter. The standard deviation of the steady-state model is 1.4%. Moreover, the potential energy efficiency ratio of the solar power and heating system is considerably larger than the coefficient of performance (COP) of general air-source heat pumps, and increases with the decrease of the condensation temperature. An overall system efficiency of 49% can be reached. Lastly, the existence of a water storage tank improves the flexibility of heating the building, and the volume of the water storage tank decreases with the increase of the heating water temperature.

Key words: parabolic trough solar collector , small-scale , practical operating characteristics , thermal performance , testing method

中图分类号:

TK 513

ZHANG Guang (张光), LI Yong (李勇). Performance Evaluation of Short Parabolic Trough Collectors Integrated with a Small-Scale Solar Power and Heating System[J]. Journal of Shanghai Jiao Tong University (Science), 2018, 23(Sup. 1): 41-49.

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Performance Evaluation of Short Parabolic Trough Collectors Integrated with a Small-Scale Solar Power and Heating System

Performance Evaluation of Short Parabolic Trough Collectors Integrated with a Small-Scale Solar Power and Heating System

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