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Comparative Experimental Analysis of the Thermal Performance of Evacuated Tube Solar Water Heater Systems With and Without a Mini-Compound Parabolic Concentrating (CPC) Reflector( C

Author

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  • Gang Pei

    (Department of Thermal Science and Energy Engineering, University of Science and Technology of China, 96 Jinzhai Road, Hefei 230026, China
    Institute of Sustainable Energy Technology, University of Nottingham, University Park, Nottingham NG7 2RD, UK)

  • Guiqiang Li

    (Department of Thermal Science and Energy Engineering, University of Science and Technology of China, 96 Jinzhai Road, Hefei 230026, China
    Institute of Sustainable Energy Technology, University of Nottingham, University Park, Nottingham NG7 2RD, UK)

  • Xi Zhou

    (Department of Thermal Science and Energy Engineering, University of Science and Technology of China, 96 Jinzhai Road, Hefei 230026, China)

  • Jie Ji

    (Department of Thermal Science and Energy Engineering, University of Science and Technology of China, 96 Jinzhai Road, Hefei 230026, China)

  • Yuehong Su

    (Institute of Sustainable Energy Technology, University of Nottingham, University Park, Nottingham NG7 2RD, UK)

Abstract

Evacuated tube solar water heater systems are widely used in China due to their high thermal efficiency, simple construction requirements, and low manufacturing costs. CPC evacuated tube solar water heaters with a geometrical concentration ratio C of less than one are rare. A comparison of the experimental rig of evacuated tube solar water heater systems with and without a mini-CPC reflector was set up, with a series of experiments done in Hefei (31°53'N, 117°15'E), China. The first and second laws of thermodynamics were used to analyze and contrast their thermal performance. The water in the tank was heated from 26.9 to 55, 65, 75, 85, and 95 °C. Two types of solar water heater systems were used, and the data gathered for two days were compared. The results show that when attaining low temperature water, the evacuated tube solar water heater system without a mini-CPC reflector has higher thermal and exergy efficiencies than the system with a mini-CPC reflector, including the average and immediate values. On the other hand, when attaining high temperature water, the system with a mini-CPC reflector has higher thermal and exergy efficiencies than the other one. The comparison presents the advantages of evacuated tube solar water heater systems with and without a mini-CPC reflector, which can be offered as a reference when choosing which solar water system to use for actual applications.

Suggested Citation

  • Gang Pei & Guiqiang Li & Xi Zhou & Jie Ji & Yuehong Su, 2012. "Comparative Experimental Analysis of the Thermal Performance of Evacuated Tube Solar Water Heater Systems With and Without a Mini-Compound Parabolic Concentrating (CPC) Reflector( C," Energies, MDPI, vol. 5(4), pages 1-14, April.
    • Handle: RePEc:gam:jeners:v:5:y:2012:i:4:p:911-924:d:17078
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    References listed on IDEAS

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    1. Kim, Yong & Seo, Taebeom, 2007. "Thermal performances comparisons of the glass evacuated tube solar collectors with shapes of absorber tube," Renewable Energy, Elsevier, vol. 32(5), pages 772-795.
    2. Chow, T.T. & Pei, G. & Fong, K.F. & Lin, Z. & Chan, A.L.S. & Ji, J., 2009. "Energy and exergy analysis of photovoltaic-thermal collector with and without glass cover," Applied Energy, Elsevier, vol. 86(3), pages 310-316, March.
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    Cited by:

    1. Carlos J. Porras-Prieto & Juan Lizcano & José L. García & Fernando R. Mazarrón, 2018. "Energy Saving in an ETC Solar System to Produce High Temperature Water," Energies, MDPI, vol. 11(4), pages 1-14, April.
    2. Zhijian Liu & Hao Li & Xinyu Zhang & Guangya Jin & Kewei Cheng, 2015. "Novel Method for Measuring the Heat Collection Rate and Heat Loss Coefficient of Water-in-Glass Evacuated Tube Solar Water Heaters Based on Artificial Neural Networks and Support Vector Machine," Energies, MDPI, vol. 8(8), pages 1-21, August.
    3. Sabiha, M.A. & Saidur, R. & Mekhilef, Saad & Mahian, Omid, 2015. "Progress and latest developments of evacuated tube solar collectors," Renewable and Sustainable Energy Reviews, Elsevier, vol. 51(C), pages 1038-1054.
    4. Shams, S.M.N. & Mc Keever, M. & Mc Cormack, S. & Norton, B., 2016. "Design and experiment of a new solar air heating collector," Energy, Elsevier, vol. 100(C), pages 374-383.
    5. Korres, Dimitrios & Tzivanidis, Christos, 2018. "A new mini-CPC with a U-type evacuated tube under thermal and optical investigation," Renewable Energy, Elsevier, vol. 128(PB), pages 529-540.
    6. Korres, Dimitrios N. & Tzivanidis, Christos & Koronaki, Irene P. & Nitsas, Michael T., 2019. "Experimental, numerical and analytical investigation of a U-type evacuated tube collectors' array," Renewable Energy, Elsevier, vol. 135(C), pages 218-231.
    7. Gong, Jing-hu & Zhang, Zhi-peng & Sun, Zhi-hao & Wang, Yu-guang & Wang, Jun & Lund, Peter D., 2023. "Thermal and thermo-mechanical analysis of a novel pass-through all-glass evacuated collector tube by combining experiment with numerical simulation," Energy, Elsevier, vol. 277(C).
    8. Dai, Y.J. & Hu, H.M. & Ge, T.S. & Wang, R.Z. & Kjellsen, Per, 2016. "Investigation on a mini-CPC hybrid solar thermoelectric generator unit," Renewable Energy, Elsevier, vol. 92(C), pages 83-94.
    9. García, José Luis & Porras-Prieto, Carlos Javier & Benavente, Rosa María & Gómez-Villarino, María Teresa & Mazarrón, Fernando R., 2019. "Profitability of a solar water heating system with evacuated tube collector in the meat industry," Renewable Energy, Elsevier, vol. 131(C), pages 966-976.

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