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Optical evaluation and analysis of an internal low-concentrated evacuated tube heat pipe solar collector for powering solar air-conditioning systems

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  • Nkwetta, Dan Nchelatebe
  • Smyth, Mervyn
  • Zacharopoulos, Aggelos
  • Hyde, Trevor

Abstract

An optical evaluation and analysis of an internal low-concentrating evacuated tube heat pipe solar collector designed to enhance the collection of solar radiation for medium temperature applications is presented in this paper. The internal low-concentrating evacuated tube heat pipe solar collector was designed with an acceptance angle of 20° given a geometrical concentration ratio of 2.92. The truncation of the upper part of the reflector giving a geometrical concentration ratio of 1.95 was carried and enabled the internal low-concentrating evacuated tube heat pipe collector to be enclosed by a borosilicate glass tube with 100 mm and 93 mm outer and inner diameters, respectively. Ray trace analysis at different transverse angles determines optical efficiencies, related optical losses and flux distribution on the absorber of the internal low-concentrating evacuated tube heat pipe solar collector. A detailed two dimensional ray trace techniques considering only the direct insolation component predicated overall ray’s acceptance of 93.72% and optical efficiency of 79.13% from transverse angles of 0° to 20°.

Suggested Citation

  • Nkwetta, Dan Nchelatebe & Smyth, Mervyn & Zacharopoulos, Aggelos & Hyde, Trevor, 2012. "Optical evaluation and analysis of an internal low-concentrated evacuated tube heat pipe solar collector for powering solar air-conditioning systems," Renewable Energy, Elsevier, vol. 39(1), pages 65-70.
    • Handle: RePEc:eee:renene:v:39:y:2012:i:1:p:65-70
    DOI: 10.1016/j.renene.2011.06.043
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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. Ersöz, Mustafa Ali, 2016. "Effects of different working fluid use on the energy and exergy performance for evacuated tube solar collector with thermosyphon heat pipe," Renewable Energy, Elsevier, vol. 96(PA), pages 244-256.
    3. Abdullahi, B. & AL-Dadah, R.K. & Mahmoud, S. & Hood, R., 2015. "Optical and thermal performance of double receiver compound parabolic concentrator," Applied Energy, Elsevier, vol. 159(C), pages 1-10.
    4. Huang, Xiaona & Wang, Qiliang & Yang, Honglun & Zhong, Shuai & Jiao, Dongsheng & Zhang, Kaili & Li, Mujun & Pei, Gang, 2019. "Theoretical and experimental studies of impacts of heat shields on heat pipe evacuated tube solar collector," Renewable Energy, Elsevier, vol. 138(C), pages 999-1009.
    5. Gao, Datong & Zhong, Shuai & Ren, Xiao & Kwan, Trevor Hocksun & Pei, Gang, 2022. "The energetic, exergetic, and mechanical comparison of two structurally optimized non-concentrating solar collectors for intermediate temperature applications," Renewable Energy, Elsevier, vol. 184(C), pages 881-898.
    6. 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.
    7. Gao, Datong & Wu, Lijun & Hao, Yong & Pei, Gang, 2022. "Ultrahigh-efficiency solar energy harvesting via a non-concentrating evacuated aerogel flat-plate solar collector," Renewable Energy, Elsevier, vol. 196(C), pages 1455-1468.
    8. Jouhara, Hussam & Ezzuddin, Hatem, 2013. "Thermal performance characteristics of a wraparound loop heat pipe (WLHP) charged with R134A," Energy, Elsevier, vol. 61(C), pages 128-138.

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