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Performance analyses in parabolic trough collectors by inserting novel inclined curved-twisted baffles

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  • Xiao, Hui
  • Liu, Peng
  • Liu, Zhichun
  • Liu, Wei

Abstract

The operation stability demands for low and uniform wall temperature in the parabolic trough collector which acts as an energy conversion component in concentrating thermal conversion technology. In order to reduce the local high temperature with moderate pump power consumption, this paper proposed longitudinal swirls impinging cooling method. Three types of novel inclined curved-twisted baffles (A1, A2, and A3) were devised to realize this method. With selecting the absorber tube as research model, this paper numerically compared the impinging cooling characteristics, wall temperature uniformity performance, and efficiency performance by inserting the three types of baffles. The A1 and A2 types each generated a pair of longitudinal swirls while the A3 type generated two pairs of longitudinal swirls. The impinging cooling always appeared near the front edge of inclined baffles. The A1 type was the best in wall temperature uniformity and efficiencies among three baffles. Furthermore, as the inlet temperature increased from 400 K to 600 K at a mass flow rate of 1.13 kg/s in the A1 type tube, the average wall temperature difference between bottom half tube and top half tube was decreased by 55.1%. Meanwhile, the average overall efficiency and exergy efficiency were increased by 0.52% and 0.22%, respectively.

Suggested Citation

  • Xiao, Hui & Liu, Peng & Liu, Zhichun & Liu, Wei, 2021. "Performance analyses in parabolic trough collectors by inserting novel inclined curved-twisted baffles," Renewable Energy, Elsevier, vol. 165(P2), pages 14-27.
    • Handle: RePEc:eee:renene:v:165:y:2021:i:p2:p:14-27
    DOI: 10.1016/j.renene.2020.11.068
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    Cited by:

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    3. Mohamed Allam & Mohamed Tawfik & Maher Bekheit & Emad El-Negiry, 2022. "Experimental Investigation on Performance Enhancement of Parabolic Trough Concentrator with Helical Rotating Shaft Insert," Sustainability, MDPI, vol. 14(22), pages 1-25, November.
    4. Chen, Heng & Mansir, Ibrahim B. & Chauhan, Bhupendra Singh & Al-Zahrani, Ahmed & Deifalla, Ahmed & Hua, Yinhai & Peng, Fan, 2023. "A comprehensive numerical study on the effectiveness of a rotational-based PTC collector integrated porous foam and PV module," Renewable Energy, Elsevier, vol. 215(C).
    5. Shinde, Tukaram U. & Dalvi, Vishwanath H. & Patil, Ramchandra G. & Mathpati, Channamallikarjun S. & Panse, Sudhir V. & Joshi, Jyeshtharaj B., 2022. "Thermal performance analysis of novel receiver for parabolic trough solar collector," Energy, Elsevier, vol. 254(PA).
    6. Osorio, Julian D. & Rivera-Alvarez, Alejandro, 2022. "Influence of the concentration ratio on the thermal and economic performance of parabolic trough collectors," Renewable Energy, Elsevier, vol. 181(C), pages 786-802.

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