Analysis of solar radiation changes in Chinese solar greenhouses with different roof structures based on a solar radiation model
Keywords:
Chinese solar greenhouse, roof structure, roof angle, solar radiation modelAbstract
Chinese solar greenhouses (CSGs) are important agricultural production facilities. Under non-artificial heating conditions, solar radiation is the only CSGs energy source. It is highly important to optimally obtain solar energy in greenhouse construction and production. In this study, a solar radiation model for solar greenhouses was adopted to explore the quantities of solar radiation in greenhouses considering different front roof forms and angles. Herein, the solar radiation amounts corresponding to five roof forms, namely, double-section arc, parabolic, oval, arc, and linear roofs, are compared and analyzed during the four solar periods (beginning of spring, vernal equinox, beginning of winter, and winter solstice). It was found that the solar radiation of oval roof greenhouses on the ground was the largest and was 4.44%-23.68% higher than that of parabolic roofs. In addition, the cumulative sum of light on the linear roof greenhouse wall is also the largest and was 6.02% to 12.08% higher than the parabolic roof greenhouse in the four solar terms. Moreover, the solar radiation in CSGs was compared with front roof angles of 25°, 30°, and 35°. It was observed that the solar radiation amount gradually increases with increasing angles. Notably, the variation at an angle of 35° influences the solar radiation of the paraboloidal CSGs ground and elliptical CSGs north wall to the greatest extent, which increased by 8.23% and 12.74%, respectively. This study confirms the role of front roof form and inclination angle in enhancing the greenhouse solar radiation level. Keywords: Chinese solar greenhouse, roof structure, roof angle, solar radiation model DOI: 10.25165/j.ijabe.20221502.6763 Citation: Liu K, Xu H J, Li H, Wu X, Sang S Y, Gao J. Analysis of Solar radiation changes in Chinese solar greenhouses with different roof structures based on a solar radiation model. Int J Agric & Biol Eng, 2022; 15(2): 221–229.References
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[3] Li G, Wang Y, Ren W, Liu S. Thermal environment regulating effects of phase change material in Chinese style solar greenhouse. Energy Procedia, 2014; 61: 2071–2074.
[4] Sonneveld P J, Swinkels G L A M, Campen J, van Tuijl B A J, Janssen H J J, Bot G P A. Performance results of a solar greenhouse combining electrical and thermal energy production. Biosystems Engineering, 2010; 106(1): 48–57.
[5] Tong G, Christopher D M, Li B. Numerical modeling of temperature variations in a Chinese solar greenhouse. Computers and Electronics in Agriculture, 2009; 68(1): 129–139.
[6] van Henten E J, Vanthoor B, Stanghellini C, de Visser P H B, Hemming S. Model based design of protected cultivation systems-first results and remaining challenges. ISHS Acta Horticulturae, 2012; 957: 255–266.
[7] Cockshull K, Graves C, Carol R. The influence of shading on yield of glasshouse tomatoes. Journal of Horticultural Science, 1992; 67(1): 11–24.
[8] Tong X J, Sun Z P, Sigrimis N, Li T L. Energy sustainability performance of a sliding cover solar greenhouse: Solar energy capture
aspects. Biosystems Engineering, 2018; 176: 88–102.
[9] Feng C Q, Zhang L Z, Wang R, Yang H B, Xu Z, Yan S Y. Greenhouse cover plate with dimming and temperature control function. Energy, 2021; 221: 119825. doi: 10.1016/j.energy.2021.119825.
[10] Zhang Z H. Development progress and problem discussion of high-efficiency and energy-saving Chinese solar greenhouse. China Vegetables, 1992; 5: 1–3, 13. (in Chinese)
[11] Zhang Y, Zou Z R. Structure and properties of solar-greenhouse with variable incidence angle. Journal of Northwest A&F University (Natural Science Edition), 2013; 41(11): 113–118, 124. (in Chinese)
[12] Zhang Y, Xu Z Y, Ma L. Solar greenhouse innovative structure. In: AIP Conference Proceedings. AIP Publishing LLC, 2021; 2361(1): 040002. doi: 10.1063/5.0055427.
[13] Li J N, Ma C W, Zhao S M, Cui W, Xia N. Light environment comparison of solar greenhouse with different roof shapes and inclination angles. Xinjiang Agricultural Sciences, 2014; 51(6): 1008–1014. (in Chinese)
[14] Yang W X. Simulation study on the influence of roof inclination on the light environment of solar greenhouse. IOP Conference Series: Earth and Environmental Science, 2021; 621(1): 012115. doi: 10.1088/1755-1315/ 621/1/012115.
[15] Maurizio C, Sonia C, Andrea M, Stefano M. Numerical modeling and simulation of pitched and curved-roof solar greenhouses provided with internal heating systems for different ambient conditions. Energy Reports,
2020; 6(3): 146–154.
[16] Wang J, Cui Q F, Lin M Z. Illumination environment of different structural solar greenhouses and their supplement illumination. Transactions of the CSAE, 2002; 18(4): 86–89. (in Chinese)
[17] Wang C D, Shi W M, Pei X W. Comparing the front roof permeated sunlight performances and the arch mechanical performances of four curvilinear roofs of solar greenhouse. Journal of Northwest A&F University (Natural Science Edition), 2010; 38(8): 143–150. (in Chinese)
[18] Zhang S F, Bai W B, Pan T R, Wu Z M, Wang Y S. Study on the optimized parameters of lighting curve of front roof of solar greenhouse in the north of China. Journal of Shanxi Agricultural University (Natural Science Edition), 2013; 33(4): 336–341. (in Chinese)
[19] Ma K. Experimental analysis of the lighting performance of several roof curve sunlight greenhouse. Master dissertation. Taiyuan: Shanxi Agricultural University, 2016; 40p. (in Chinese)
[20] Ayoub M. Contrasting accuracies of single and ensemble models for predicting solar and thermal performances of traditional vaulted roofs. Solar Energy, 2022; 236: 335–355.
[21] Xu H J, Cao Y F, Li Y R, Gao J, Jiang W J, Zou Z R. Establishment and application of solar radiation model in solar greenhouse. Transactions of the CSAE, 2019; 35(7): 160–169. (in Chinese)
[22] Chen C, Li Y, Li N, Wei S, Yang F G, Ling H S, et al. A computational model to determine the optimal orientation for solar greenhouses located at different latitudes in China. Solar Energy, 2018; 165: 19–26.
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Published
2022-04-23
How to Cite
Liu, K., Xu, H., Li, H., Wu, X., Sang, S., & Gao, J. (2022). Analysis of solar radiation changes in Chinese solar greenhouses with different roof structures based on a solar radiation model. International Journal of Agricultural and Biological Engineering, 15(2), 221–229. Retrieved from https://ijabe.migration.pkpps03.publicknowledgeproject.org/index.php/ijabe/article/view/6763
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Structures and Bio-environmental Engineering
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