达累斯萨拉姆最佳太阳能集热器南北倾斜角度及其对能量收集的影响

IF 5.3 Q2 ENGINEERING, ENVIRONMENTAL
Abdulmajid T. Khatib , Margaret E. Samiji , Nuru R. Mlyuka
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引用次数: 0

摘要

如果采用某种太阳跟踪技术,太阳能集热器可获得更多的太阳辐射。然而,最佳集热器倾斜角度取决于地理位置和其他参数,包括现场的太阳日照。在这项研究中,使用倾斜角-纬度关系模型计算了每日、每月、每半年和每年的最佳倾斜角。然后,考虑到太阳辐射的年度波动,利用这些数据通过加权平均得出月度和年度最佳倾斜角。结果发现,达累斯萨拉姆的最佳年倾角为向北 5.3°,而向南和向北的半年度倾角分别为 10.5°和 18.9°。对南北跟踪太阳能集热器的能量收集进行的分析表明,与固定水平集热器相比,最佳日倾斜和月倾斜可提高约 5%,半年度倾斜可提高 4.3%,年度倾斜可提高约 0.8%。这项研究的结果为达累斯萨拉姆的太阳跟踪提供了最佳倾斜角度,通过每日、每月或每年两次的太阳跟踪,太阳能集热器收集的能量可显著增加。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Optimum Solar Collector's North-South Tilt Angles for Dar es Salaam and their Influence on Energy Collection

Solar collectors may receive significantly more solar radiation if some kind of Sun tracking is utilised. Optimal collector tilt angles, however, depend on the geographic location and other parameters including solar insolation for the site. In this study, daily, monthly, biannual and annual optimum tilt angles are calculated using a tilt angle-latitude relation model. The data are then used to obtain monthly and yearly optimum tilt angles through weighted averages considering the yearly fluctuations in solar radiation. The optimum annual tilt angle for Dar es Salaam is found to be 5.3° northwards, whereas biannual tilt angles due south and north are 10.5° and 18.9°, respectively. Analysis on the energy collection by a north-south tracking solar collector revealed an improvement of about 5% with optimum daily and monthly tilting, 4.3% with biannual tilting and about 0.8% with annual tilting, compared to a fixed horizontal collector. The results from this study provide optimal tilt angles for Sun tracking in Dar es Salaam and significant gain in energy collected by the solar collector may be realized through daily, monthly or biannual tracking of the Sun.

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来源期刊
Cleaner Engineering and Technology
Cleaner Engineering and Technology Engineering-Engineering (miscellaneous)
CiteScore
9.80
自引率
0.00%
发文量
218
审稿时长
21 weeks
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