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Modified mathematical model for evaluating the performance of water-in-glass evacuated tube solar collector considering tube shading effect

Author

Listed:
  • Kabeel, A.E.
  • Khalil, A.
  • Elsayed, S.S.
  • Alatyar, A.M.

Abstract

The aim of this paper is to introduce a procedure for simulating the absorbed solar radiation and heat transfer process in water-in-glass evacuated tube solar collectors. The procedure is developed to calculate the daily utilized solar energy and outlet collector temperature for different tilt angles, collector azimuth angles and geometric parameters without requirement for any experimental factor determination. Total absorbed solar radiation is evaluated by integrating the flat-plate solar collector performance equations over the tube circumference taking into account the shading of the adjacent tubes and variance of transmissivity–absorptivity product with the incidence angle of radiation. The heat transfer into the collector fluid is evaluated by subtracting the heat loss from the total absorbed solar radiation. Comparison between calculated and measured tank temperature shows a good agreement between them under different heating loads. Performance of solar collector at different tilt angles, collector Azimuth angles, tubes spacing and collector mass flow rate is investigated theoretically.

Suggested Citation

  • Kabeel, A.E. & Khalil, A. & Elsayed, S.S. & Alatyar, A.M., 2015. "Modified mathematical model for evaluating the performance of water-in-glass evacuated tube solar collector considering tube shading effect," Energy, Elsevier, vol. 89(C), pages 24-34.
    • Handle: RePEc:eee:energy:v:89:y:2015:i:c:p:24-34
    DOI: 10.1016/j.energy.2015.06.072
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    References listed on IDEAS

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    1. Shah, L. J. & Furbo, S., 2004. "Vertical evacuated tubular-collectors utilizing solar radiation from all directions," Applied Energy, Elsevier, vol. 78(4), pages 371-395, August.
    2. Tang, Runsheng & Gao, Wenfeng & Yu, Yamei & Chen, Hua, 2009. "Optimal tilt-angles of all-glass evacuated tube solar collectors," Energy, Elsevier, vol. 34(9), pages 1387-1395.
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    Citations

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    Cited by:

    1. Chan, A.L.S., 2019. "Effect of adjacent shading on the energy and environmental performance of photovoltaic glazing system in building application," Energy, Elsevier, vol. 187(C).
    2. Chen, Xiaomeng & Wang, Yang & Yang, Xudong, 2023. "New biaxial approach to evaluate the optical performance of evacuated tube solar thermal collector," Energy, Elsevier, vol. 271(C).
    3. Fathabadi, Hassan, 2020. "Novel solar collector: Evaluating the impact of nanoparticles added to the collector’s working fluid, heat transfer fluid temperature and flow rate," Renewable Energy, Elsevier, vol. 148(C), pages 1165-1173.
    4. Sadeghi, Gholamabbas & Pisello, Anna Laura & Safarzadeh, Habibollah & Poorhossein, Miad & Jowzi, Mohammad, 2020. "On the effect of storage tank type on the performance of evacuated tube solar collectors: Solar radiation prediction analysis and case study," Energy, Elsevier, vol. 198(C).
    5. Chen, Xiaomeng & Yang, Xudong & Li, Muran, 2022. "Combining horizontal evacuated tubes with booster mirror reflector to achieve seasonal reverse output: Technical and experimental investigation," Renewable Energy, Elsevier, vol. 188(C), pages 450-464.
    6. Li, Qiong & Gao, Wenfeng & Lin, Wenxian & Liu, Tao & Zhang, Yougang & Ding, Xiang & Huang, Xiaoqiao & Liu, Wuming, 2020. "Experiment and simulation study on convective heat transfer of all-glass evacuated tube solar collector," Renewable Energy, Elsevier, vol. 152(C), pages 1129-1139.
    7. Kumar, P. Manoj & Mylsamy, K., 2020. "A comprehensive study on thermal storage characteristics of nano-CeO2 embedded phase change material and its influence on the performance of evacuated tube solar water heater," Renewable Energy, Elsevier, vol. 162(C), pages 662-676.
    8. Xia, En-Tong & Chen, Fei, 2020. "Analyzing thermal properties of solar evacuated tube arrays coupled with mini-compound parabolic concentrator," Renewable Energy, Elsevier, vol. 153(C), pages 155-167.
    9. Kabeel, A.E. & Khalil, A. & Elsayed, S.S. & Alatyar, A.M., 2018. "Theoretical investigation on energy storage characteristics of a solar liquid desiccant air conditioning system in Egypt," Energy, Elsevier, vol. 158(C), pages 164-180.

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