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Experimental investigation and simulation analysis of the thermal performance of a balcony wall integrated solar water heating unit

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  • Li, Rui
  • Dai, Yanjun
  • Wang, Ruzhu

Abstract

A balcony wall type solar water heater system was designed and constructed in a high-rise building. The U-type evacuated glass tube solar collector is fixed vertically on the balcony wall. The water, heated in the solar collector, flows through the exchanger coil in the water tank and then flows back to the solar collector. With regard to the hot water supply system, the cold water, heated by the heat exchanger, is sent to the point of use. Considering storeys and water consumption pattern, four apartments are selected for testing. Meanwhile, the theoretical analysis with TRNSYS was presented. According to the experimental results, mean daily collector efficiency is about 40%. Solar fraction is high in summer and autumn for the relative high radiation and high ambient temperature. Under given conditions, the annual energy extracted from tank is 2805.3 MJ/m2, and the annual solar fraction is 40.5%. When the tank volume-to-collector area ratio is decreased to 37.5 L/m2, the solar fraction can be increased to 50%. The results show that the family to use water all day round gets higher solar fraction than the family using hot water mostly in the morning and night.

Suggested Citation

  • Li, Rui & Dai, Yanjun & Wang, Ruzhu, 2015. "Experimental investigation and simulation analysis of the thermal performance of a balcony wall integrated solar water heating unit," Renewable Energy, Elsevier, vol. 75(C), pages 115-122.
    • Handle: RePEc:eee:renene:v:75:y:2015:i:c:p:115-122
    DOI: 10.1016/j.renene.2014.09.023
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    References listed on IDEAS

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    1. Kalogirou, Soteris A. & Bojic, Milorad, 2000. "Artificial neural networks for the prediction of the energy consumption of a passive solar building," Energy, Elsevier, vol. 25(5), pages 479-491.
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    3. Chow, T.T. & Fong, K.F. & Chan, A.L.S. & Lin, Z., 2006. "Potential application of a centralized solar water-heating system for a high-rise residential building in Hong Kong," Applied Energy, Elsevier, vol. 83(1), pages 42-54, January.
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    Cited by:

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    2. Chen, Fei & Liu, Yang, 2022. "Model construction and performance investigation of multi-section compound parabolic concentrator with solar vacuum tube," Energy, Elsevier, vol. 250(C).
    3. Lamnatou, Chr. & Cristofari, C. & Chemisana, D. & Canaletti, J.L., 2016. "Building-integrated solar thermal systems based on vacuum-tube technology: Critical factors focusing on life-cycle environmental profile," Renewable and Sustainable Energy Reviews, Elsevier, vol. 65(C), pages 1199-1215.
    4. Shan, M. & Yu, T. & Yang, X., 2016. "Assessment of an integrated active solar and air-source heat pump water heating system operated within a passive house in a cold climate zone," Renewable Energy, Elsevier, vol. 87(P3), pages 1059-1066.
    5. Buonomano, Annamaria & Calise, Francesco & Palombo, Adolfo & Vicidomini, Maria, 2019. "Transient analysis, exergy and thermo-economic modelling of façade integrated photovoltaic/thermal solar collectors," Renewable Energy, Elsevier, vol. 137(C), pages 109-126.
    6. Vassiliades, C. & Agathokleous, R. & Barone, G. & Forzano, C. & Giuzio, G.F. & Palombo, A. & Buonomano, A. & Kalogirou, S., 2022. "Building integration of active solar energy systems: A review of geometrical and architectural characteristics," Renewable and Sustainable Energy Reviews, Elsevier, vol. 164(C).
    7. Vieira, Abel S. & Stewart, Rodney A. & Lamberts, Roberto & Beal, Cara D., 2018. "Residential solar water heaters in Brisbane, Australia: Key performance parameters and indicators," Renewable Energy, Elsevier, vol. 116(PA), pages 120-132.

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