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Determination of optimum tilt angle and orientation for solar collectors based on effective solar heat collection
Qilu Univ Technol, Shandong Acad Sci, Sch Mech & Automot Engn, Jinan, Shandong, Peoples R China.;Ningbo RK Solar Tech Ltd, Ningbo, Zhejiang, Peoples R China..
Tsinghua Univ, Sch Architecture, Beijing, Peoples R China.;China Southwest Architecture Design & Res Inst Co, Chengdu, Sichuan, Peoples R China..
China Southwest Architecture Design & Res Inst Co, Chengdu, Sichuan, Peoples R China..
KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Chemical Engineering, Energy Processes. Malardalen Univ, Sch Business Soc & Energy, Vasteras, Sweden..
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2018 (English)In: Applied Energy, ISSN 0306-2619, E-ISSN 1872-9118, Vol. 219, p. 11-19Article in journal (Refereed) Published
Abstract [en]

Determination of optimum tilt angle and orientation of solar collectors by maximizing the total solar radiation may overestimate the energy production benefits, because a considerable amount of solar radiation is ineffective for practical solar collectors. In this paper, the concept of effective solar heat collection is proposed to rule out the ineffective solar radiation that could not be converted to available energy. Accordingly, an optimized mathematical model is developed and used to determine the optimum tilt angle and orientation of solar collectors installed in Lhasa during the heating season. Compared with the total solar radiation based optimum results, there is a deviation of 5 degrees in the optimum orientations based on the effective solar heat collection. The case study shows that it is not advisable to adjust the optimum tilt angle on a monthly basis because there is no significance change in total solar energy gains in comparison with the case of no such adjustment during the heating season. In addition, the correction factors to achieving the maximum effective solar heat collection are given at different tilt angles and orientations to guide installation of solar collectors in practical engineering applications.

Place, publisher, year, edition, pages
ELSEVIER SCI LTD , 2018. Vol. 219, p. 11-19
Keywords [en]
Solar collector, Optimum tilt angle, Optimum orientation, Effective solar heat collection, Mathematical model
National Category
Environmental Engineering
Identifiers
URN: urn:nbn:se:kth:diva-227732DOI: 10.1016/j.apenergy.2018.03.014ISI: 000430519200002Scopus ID: 2-s2.0-85044100516OAI: oai:DiVA.org:kth-227732DiVA, id: diva2:1205767
Note

QC 20180515

Available from: 2018-05-15 Created: 2018-05-15 Last updated: 2018-05-15Bibliographically approved

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