Abstract
The authors defined four physical quantities’ shading rates, namely the time integral of insolation area, the direct solar radiation, the diffuse solar radiation, and the incident solar radiation. Taking a practical project’s roof in western Sichuan as an object, this paper studied shading rates from roof structures on the solar collector layout area in the heating season and quantified shading impacts from different time dimensions. The results show that shading rates are maximum in the coldest month, December, and that is smaller in the early and late of the heating season. In December, shading rates of the time integral of insolation area and the incident solar radiation are 53% and 30%, respectively, which indicate that shading effects of roof structures cannot be ignored in the heating system design. The research results are of great reference value for the installation optimization of collectors and the reasonable matching of the heating system.
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References
China building energy efficiency annual development report. Building Energy Conservation Research Center of Tsinghua University, Beijing (2007)
Redweik, P., Catita, C., Brito, M.: Solar energy potential on roofs and facades in an urban landscape. Sol. Energy 97, 332–341 (2013)
Gagnon, P., Margolis, R.: Rooftop Solar Photovoltaic Technical Potential in the United States: A Detailed Assessment. NREL, Golden (2017)
Ordonez, J., Jadraque, E., Alegre, J., Martinez, G.: Analysis of the photovoltaic solar energy capacity of residential rooftops in Andalusia (Spain). Renew. Sustain. Energy Rev. 14(7), 2122–2130 (2010)
Dehwah, A., Asif, M.: Assessment of net energy contribution to buildings by rooftop photovoltaic systems in hot-humid climates. Renew. Energy 131, 1288–1299 (2019)
Guo, L., Ju, Z., Liu, J.: Experiment and research of the static shadow’s effect on the photovoltaic solar house. J. Shenyang Inst. Eng. 10(4), 289–294 (2014)
Zhai, Z., Chen, X., Jin, L., Zha, J.: Characteristics of partially shadowed serial PV module output. J. Univ. Sci. Technol. China 39(4), 398–402 (2009)
Chen, X., Huang, C.: Discussions on the sampling time interval in sunshine computation of building. Zhejiang Constr. 26(7), 68–80 (2009)
Perez, R., Ineichen, P., Seals, R., Michalsky, J.: Modeling daylight availability and irradiance components from direct and global irradiance. Sol. Energy 44, 271–289 (1990)
Li, Q., Li, W., Deng, D.: Feasibility Study Report of Urban Central Heating Project in Dacheng County. China Coal International Engineering Group Chongqing Design and Research Institute, Chongqing (2009)
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Xu, L., Long, E., Xiao, X., Wang, Z. (2020). Study on the Degree and Mechanism of Solar Shading Impacts from Rooftop Structures in the Solar Collector Layout Area. In: Wang, Z., Zhu, Y., Wang, F., Wang, P., Shen, C., Liu, J. (eds) Proceedings of the 11th International Symposium on Heating, Ventilation and Air Conditioning (ISHVAC 2019). ISHVAC 2019. Environmental Science and Engineering(). Springer, Singapore. https://doi.org/10.1007/978-981-13-9528-4_140
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DOI: https://doi.org/10.1007/978-981-13-9528-4_140
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