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Performance Simulation of Solar Trough Concentrators: Optical and Thermal Comparisons

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  • Fei Cao

    (College of Mechanical and Electrical Engineering, Hohai University, Changzhou 213022, China)

  • Jiarui Pang

    (College of Mechanical and Electrical Engineering, Hohai University, Changzhou 213022, China)

  • Xianzhe Gu

    (College of Mechanical and Electrical Engineering, Hohai University, Changzhou 213022, China)

  • Miaomiao Wang

    (College of Mechanical and Electrical Engineering, Hohai University, Changzhou 213022, China)

  • Yanqin Shangguan

    (College of Mechanical and Electrical Engineering, Hohai University, Changzhou 213022, China)

Abstract

The solar trough concentrator is used to increase the solar radiation intensity on absorbers for water heating, desalination, or power generation purposes. In this study, optical performances of four solar trough concentrators, viz. the parabolic trough concentrator (PTC), the compound parabolic concentrator (CPC), the surface uniform concentrator (SUC), and the trapezoid trough concentrator (TTC), are simulated using the Monte Carlo Ray Tracing method. Mathematical models for the solar trough concentrators are first established. The solar radiation distributions on their receivers are then simulated. The solar water heating performances using the solar trough concentrators are finally compared. The results show that, as a high-concentration ratio concentrator, the PTC can achieve the highest heat flux, but suffers from the worst uniformity on the absorber, which is only 0.32%. The CPC can generate the highest heat flux among the rest three low-concentration ratio solar trough concentrators. Compared with the PTC and the CPC, the TTC has better uniformity, but its light-receiving ratio is only 70%. The SUC is beneficial for its highest uniformity of 87.38%. Thermal analysis results show that the water temperatures inside the solar trough concentrators are directly proportional to their wall temperature, with the highest temperature rise in the PTC and the smallest temperature rise in the TTC. The solar trough concentrators’ thermal deformations are positively correlated to their wall temperatures. The radial deformation of the SUC is much larger than those of other solar trough concentrators. The smallest equivalent stress is found in the SUC, which is beneficial to the long-term operation of the solar water heating system.

Suggested Citation

  • Fei Cao & Jiarui Pang & Xianzhe Gu & Miaomiao Wang & Yanqin Shangguan, 2023. "Performance Simulation of Solar Trough Concentrators: Optical and Thermal Comparisons," Energies, MDPI, vol. 16(4), pages 1-18, February.
    • Handle: RePEc:gam:jeners:v:16:y:2023:i:4:p:1673-:d:1060977
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    Cited by:

    1. Fei Cao & Yan Yang, 2023. "Recent Advances in Residential Energy Utilization Technologies for Low-Carbon Emissions in China," Energies, MDPI, vol. 16(13), pages 1-3, July.
    2. Cheng Zhang & Na Li & Guangqi An, 2024. "Review of Concentrated Solar Power Technology Applications in Photocatalytic Water Purification and Energy Conversion: Overview, Challenges and Future Directions," Energies, MDPI, vol. 17(2), pages 1-24, January.

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