Experimental Investigation of a Small-Scale Parabolic Trough Concentrated Solar Power ‎Systems

IF 1 Q3 MULTIDISCIPLINARY SCIENCES
Ismael A. S. Ehtiwesh
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引用次数: 0

Abstract

Large-scale systems have a lower levelized cost of electricity than small-scale concentrated solar power systems. Thus, the purpose of the present study is to evaluate the potential of using standalone small-‎scale ‎concentrated ‎solar power collectors in order to generate process ‎heat ‎at ‎a ‎moderate ‎temperature, which directly utilizes thermal energy without the need to generate electricity. ‎A ‎parabolic trough ‎collector (3.6m2) ‎was ‎designed ‎and ‎manufactured, including a dual-axis solar tracking system with and without an insulating function. An ‎insulating ‎cavity ‎was incorporated to ‎minimize the heat ‎losses collected by the absorbed ‎tube. ‎The experiments ‎were ‎carried out during a time of high winds and unfavorable weather ‎in ‎Sabratha City. The findings of the experiments demonstrated that the produced temperature and the collected heat energy progressively increase until they reach their maximum value, and then gradually decrease. The maximum water ‎temperature ‎was 96ºC at ‎a ‎flow rate ‎of ‎‎0.5L/min, and ‎the highest amount of ‎heat energy was 550W/m². ‎Wind speed showed an important impact on the produced temperature; therefore, various comparative experiments were carried out in the same climate condition; ‎the experiment with the insulating function ‎presented the least heat loss, and it takes a higher edge of 11% in terms of efficiency. ‎In addition, the water temperature rose to 120°C where steam was generated at a zero flow rate, while the oil ‎reached 194ºC. In addition, a mathematical model was also implemented to theoretically study energy balance; with little expected discrepancy, its predictions and the experimental results agreed. In conclusion, the results presented reasonable markers of interest despite the poor environmental conditions during the experiments.‎
小型抛物面槽式聚光太阳能发电系统的实验研究
大型系统的平准化电力成本低于小型聚光太阳能发电系统。因此,本研究的目的是评估使用独立的小型聚光太阳能集热器的潜力,以产生温度适中的工艺热,直接利用热能而无需发电。研究设计并制造了一个抛物面槽式集热器(3.6 平方米),包括一个具有和不具有隔热功能的双轴太阳能跟踪系统。为了最大限度地减少吸收管收集的热量损失,还加入了一个隔热腔。实验是在萨布拉塔市大风和恶劣天气期间进行的。实验结果表明,产生的温度和收集的热能逐渐增加,直到达到最大值,然后逐渐减少。流量为 0.5 升/分钟时,最高水温为 96 摄氏度,最高热能为 550 瓦/平方米。风速对产生的温度有重要影响;因此,在相同气候条件下进行了各种对比实验;具有隔热功能的实验热量损失最少,效率高达 11%。此外,水温升至 120°C,在零流量下产生蒸汽,而油则达到 194°C。此外,还利用数学模型对能量平衡进行了理论研究;数学模型的预测与实验结果一致,几乎没有预期的差异。总之,尽管实验期间的环境条件很差,但实验结果还是给出了合理的相关指标。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
gazi university journal of science
gazi university journal of science MULTIDISCIPLINARY SCIENCES-
CiteScore
1.60
自引率
11.10%
发文量
87
期刊介绍: The scope of the “Gazi University Journal of Science” comprises such as original research on all aspects of basic science, engineering and technology. Original research results, scientific reviews and short communication notes in various fields of science and technology are considered for publication. The publication language of the journal is English. Manuscripts previously published in another journal are not accepted. Manuscripts with a suitable balance of practice and theory are preferred. A review article is expected to give in-depth information and satisfying evaluation of a specific scientific or technologic subject, supported with an extensive list of sources. Short communication notes prepared by researchers who would like to share the first outcomes of their on-going, original research work are welcome.
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