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Comparative field performance study of concentrator augmented array with two system configurations

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  • Nkwetta, Dan Nchelatebe
  • Smyth, Mervyn

Abstract

The paper describes the system and experimental evaluation of an evacuated tube heat pipe collector array augmented with a novel design internal concentrator having a direct flow absorber and tested in the north–south and east–west align configurations under real outdoor conditions. External and internal concentrators have the potential to supply higher generator inlet temperatures needed for solar driven cooling systems. However, internal concentrator augmented solar collectors can further reduce heat losses and increase output temperatures. It is shown that collector outlet temperatures of 110°C or more is possible and can be efficiently used to drive solar cooling systems with higher coefficient of performance (COP). The evacuated tube collector array augmented with a novely designed internal concentrator having a direct flow absorber in the north–south alignment was found to be more energy efficient with larger temperature lift and outlet and inlet temperature differential and substantial improvement in thermal performance compared to its east–west align configuration due to shorter connection piping connecting the internal concentrator augmented CPC to the evacuated tube heat pipe collector array.

Suggested Citation

  • Nkwetta, Dan Nchelatebe & Smyth, Mervyn, 2012. "Comparative field performance study of concentrator augmented array with two system configurations," Applied Energy, Elsevier, vol. 92(C), pages 800-808.
    • Handle: RePEc:eee:appene:v:92:y:2012:i:c:p:800-808
    DOI: 10.1016/j.apenergy.2011.08.030
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    References listed on IDEAS

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    1. Chow, T. T. & Chan, A. L. S., 2004. "Numerical study of desirable solar-collector orientations for the coastal region of South China," Applied Energy, Elsevier, vol. 79(3), pages 249-260, November.
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    3. Ayompe, L.M. & Duffy, A. & Mc Keever, M. & Conlon, M. & McCormack, S.J., 2011. "Comparative field performance study of flat plate and heat pipe evacuated tube collectors (ETCs) for domestic water heating systems in a temperate climate," Energy, Elsevier, vol. 36(5), pages 3370-3378.
    4. Tanaka, Hiroshi, 2011. "Solar thermal collector augmented by flat plate booster reflector: Optimum inclination of collector and reflector," Applied Energy, Elsevier, vol. 88(4), pages 1395-1404, April.
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    Citations

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    Cited by:

    1. Nkwetta, Dan Nchelatebe & Sandercock, Jim, 2016. "A state-of-the-art review of solar air-conditioning systems," Renewable and Sustainable Energy Reviews, Elsevier, vol. 60(C), pages 1351-1366.
    2. Nkwetta, Dan Nchelatebe & Smyth, Mervyn, 2012. "Performance analysis and comparison of concentrated evacuated tube heat pipe solar collectors," Applied Energy, Elsevier, vol. 98(C), pages 22-32.
    3. Kim, Yong Sin & Balkoski, Kevin & Jiang, Lun & Winston, Roland, 2013. "Efficient stationary solar thermal collector systems operating at a medium-temperature range," Applied Energy, Elsevier, vol. 111(C), pages 1071-1079.
    4. Javed Akhter & Syed I. Gilani & Hussain H. Al-Kayiem & Muzaffar Ali, 2019. "Optical Performance Analysis of Single Flow Through and Concentric Tube Receiver Coupled with a Modified CPC Collector Under Different Configurations," Energies, MDPI, vol. 12(21), pages 1-24, October.
    5. Riaz, Hamza & Ali, Muzaffar & Akhter, Javed & Sheikh, Nadeem Ahmed & Rashid, Muhammad & Usman, Muhammad, 2023. "Numerical and experimental investigations of an involute shaped solar compound parabolic collector with variable concentration ratio," Renewable Energy, Elsevier, vol. 216(C).

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