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Improvement of uniformity of irradiance on truncated compound parabolic concentrator by introducing the homogenizer ratio

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  • Shanmugam, Mathiyazhagan
  • Maganti, Lakshmi Sirisha

Abstract

A compound parabolic concentrator (CPC) with a flat absorber is widely used in low-concentrating photovoltaic thermal (CPVT) systems. CPC certainly develops non-uniform heat flux distribution over the absorber surface which is significantly reduced by the integration of homogenizer referred as Elongated CPC (ECPC). The objective of the present work is to analyse the effect of homogenizer ratios, truncation ratios and concentration ratios on the heat flux distribution characteristics of a CPC collector. In this paper, a ray tracing simulation is carried out to obtain the heat flux distribution profiles and the same is incorporated within CFD software to obtain the temperature distribution profiles. As a result, it is observed that the optimum truncation ratio would be 0.7 at which uniformity in flux distribution is improved by 3%, with just 2% reduction of average heat flux value. Furthermore, with optimized homogenizer ratio of −0.35 at concentration ratio of 3, 64% improvement in uniformity of flux distribution has been noticed. From the study, it has been concluded that for different concentration ratios of 1.5, 2, 3, 4, 5, 6, 7 and 8, the optimum homogenizer ratio is observed to be −0.9, −0.55, −0.35, −0.25, −0.2, −0.15, −0.15 and −0.05 respectively.

Suggested Citation

  • Shanmugam, Mathiyazhagan & Maganti, Lakshmi Sirisha, 2023. "Improvement of uniformity of irradiance on truncated compound parabolic concentrator by introducing the homogenizer ratio," Renewable Energy, Elsevier, vol. 204(C), pages 580-592.
    • Handle: RePEc:eee:renene:v:204:y:2023:i:c:p:580-592
    DOI: 10.1016/j.renene.2023.01.041
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    References listed on IDEAS

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    1. Zhang, Gaoming & Wei, Jinjia & Wang, Zexin & Xie, Huling & Xi, Yonghao & Khalid, Muhammad, 2019. "Investigation into effects of non-uniform irradiance and photovoltaic temperature on performances of photovoltaic/thermal systems coupled with truncated compound parabolic concentrators," Applied Energy, Elsevier, vol. 250(C), pages 245-256.
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    3. Kong, Chengdong & Xu, Zilin & Yao, Qiang, 2013. "Outdoor performance of a low-concentrated photovoltaic–thermal hybrid system with crystalline silicon solar cells," Applied Energy, Elsevier, vol. 112(C), pages 618-625.
    4. Li, Guiqiang & Xuan, Qingdong & Pei, Gang & Su, Yuehong & Ji, Jie, 2018. "Effect of non-uniform illumination and temperature distribution on concentrating solar cell - A review," Energy, Elsevier, vol. 144(C), pages 1119-1136.
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