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Minimum entropy generation due to heat transfer and fluid friction in a parabolic trough receiver with non-uniform heat flux at different rim angles and concentration ratios

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  • Mwesigye, Aggrey
  • Bello-Ochende, Tunde
  • Meyer, Josua P.

Abstract

In this paper, Monte Carlo ray-tracing and computational fluid dynamics are used to numerically investigate the minimum entropy generation due to heat transfer and fluid friction in a parabolic trough receiver. The analysis was carried out for rim angles in the range 40°–120°, concentration ratios in the range 57–143, Reynolds numbers in the range 1.02 × 104–1.36 × 106 and fluid temperatures in the range 350–650 K. Results show existence of an optimal Reynolds number at any given combination of fluid temperature, concentration ratio and rim angle for which the total entropy generation is a minimum. The total entropy generation was found to increase as the rim angle reduced, concentration ratio increased and fluid temperature reduced. The high entropy generation rates at low rim angles are mainly due to high peak temperatures in the absorber tube at these low rim angles.

Suggested Citation

  • Mwesigye, Aggrey & Bello-Ochende, Tunde & Meyer, Josua P., 2014. "Minimum entropy generation due to heat transfer and fluid friction in a parabolic trough receiver with non-uniform heat flux at different rim angles and concentration ratios," Energy, Elsevier, vol. 73(C), pages 606-617.
    • Handle: RePEc:eee:energy:v:73:y:2014:i:c:p:606-617
    DOI: 10.1016/j.energy.2014.06.063
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    1. He, Ya-Ling & Xiao, Jie & Cheng, Ze-Dong & Tao, Yu-Bing, 2011. "A MCRT and FVM coupled simulation method for energy conversion process in parabolic trough solar collector," Renewable Energy, Elsevier, vol. 36(3), pages 976-985.
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    6. Mwesigye, Aggrey & Bello-Ochende, Tunde & Meyer, Josua P., 2013. "Numerical investigation of entropy generation in a parabolic trough receiver at different concentration ratios," Energy, Elsevier, vol. 53(C), pages 114-127.
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    Cited by:

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    8. Yang, S. & Sensoy, T.S. & Ordonez, J.C., 2018. "Dynamic 3D volume element model of a parabolic trough solar collector for simulation and optimization," Applied Energy, Elsevier, vol. 217(C), pages 509-526.
    9. Salgado Conrado, L. & Rodriguez-Pulido, A. & Calderón, G., 2017. "Thermal performance of parabolic trough solar collectors," Renewable and Sustainable Energy Reviews, Elsevier, vol. 67(C), pages 1345-1359.
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    11. Amit K. Bhakta & Nitesh K. Panday & Shailendra N. Singh, 2018. "Performance Study of a Cylindrical Parabolic Concentrating Solar Water Heater with Nail Type Twisted Tape Inserts in the Copper Absorber Tube," Energies, MDPI, vol. 11(1), pages 1-15, January.
    12. Mwesigye, Aggrey & Huan, Zhongjie & Meyer, Josua P., 2015. "Thermodynamic optimisation of the performance of a parabolic trough receiver using synthetic oil–Al2O3 nanofluid," Applied Energy, Elsevier, vol. 156(C), pages 398-412.
    13. Yılmaz, İbrahim Halil & Mwesigye, Aggrey, 2018. "Modeling, simulation and performance analysis of parabolic trough solar collectors: A comprehensive review," Applied Energy, Elsevier, vol. 225(C), pages 135-174.
    14. Singh, Manmeet & Sharma, Manoj Kumar & Bhattacharya, Jishnu, 2021. "Design methodology of a parabolic trough collector field for maximum annual energy yield," Renewable Energy, Elsevier, vol. 177(C), pages 229-241.
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    17. Mwesigye, Aggrey & Yılmaz, İbrahim Halil & Meyer, Josua P., 2018. "Numerical analysis of the thermal and thermodynamic performance of a parabolic trough solar collector using SWCNTs-Therminol®VP-1 nanofluid," Renewable Energy, Elsevier, vol. 119(C), pages 844-862.
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