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Experimental study of glass to metal seals for parabolic trough receivers

Author

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  • Lei, Dongqiang
  • Wang, Zhifeng
  • Li, Jian
  • Li, Jianbin
  • Wang, Zhijian

Abstract

The breakage of the glass to metal sealing is the primary ongoing issue for the solar receiver tubes in parabolic trough solar power systems. Sealing failure leads to loss of the vacuum inside the tube which substantially reduces the collector efficiency. It is a technical difficulty to obtain good glass to metal seals with high mechanical strength and long-term temperature resistance during current receiver manufacturing. The paper describes the development of the glass to metal seals in the parabolic trough receivers and presents a new method that uses the high-frequency induction heating to band a new borosilicate glass to the Kovar alloy ends. Kovar pre-oxidization experiments were used to measure the relation curves of Kovar oxidation weight gain during heating. The preoxidation of Kovar and the sealing process are guided by a series tests to measure the gas tightness, sealing strength, seal interface microstructure and thermal shock. The results show that excellent glass-to-Kovar sealing can be obtained with a Kovar oxidation weight gain of about 0.3–0.8 mg/cm2. Finally, a new solar receiver was developed by the new sealing method.

Suggested Citation

  • Lei, Dongqiang & Wang, Zhifeng & Li, Jian & Li, Jianbin & Wang, Zhijian, 2012. "Experimental study of glass to metal seals for parabolic trough receivers," Renewable Energy, Elsevier, vol. 48(C), pages 85-91.
    • Handle: RePEc:eee:renene:v:48:y:2012:i:c:p:85-91
    DOI: 10.1016/j.renene.2012.04.033
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    References listed on IDEAS

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    1. Lei, Dongqiang & Wang, Zhifeng & Li, Jian, 2010. "The calculation and analysis of glass-to-metal sealing stress in solar absorber tube," Renewable Energy, Elsevier, vol. 35(2), pages 405-411.
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    Cited by:

    1. Wu, Zhiyong & Lei, Dongqiang & Yuan, Guofeng & Shao, Jiajia & Zhang, Yunting & Wang, Zhifeng, 2014. "Structural reliability analysis of parabolic trough receivers," Applied Energy, Elsevier, vol. 123(C), pages 232-241.
    2. Liu, Jinmei & Lei, Dongqiang & Li, Qiang, 2016. "Vacuum lifetime and residual gas analysis of parabolic trough receiver," Renewable Energy, Elsevier, vol. 86(C), pages 949-954.
    3. Vishal Dabra & Avadhesh Yadav, 2020. "Performance analysis and comparison of glazed and unglazed solar air collector," Environment, Development and Sustainability: A Multidisciplinary Approach to the Theory and Practice of Sustainable Development, Springer, vol. 22(2), pages 863-881, February.
    4. Fahim Ullah & Mansoor K Khattak & Kang Min, 2018. "Experimental investigation of the comparison of compound parabolic concentrator and ordinary heat pipe-type solar concentrator," Energy & Environment, , vol. 29(5), pages 770-783, August.
    5. Lei, Dongqiang & Fu, Xuqiang & Ren, Yucong & Yao, Fangyuan & Wang, Zhifeng, 2019. "Temperature and thermal stress analysis of parabolic trough receivers," Renewable Energy, Elsevier, vol. 136(C), pages 403-413.
    6. Joshi, Rakesh & Chhibber, Rahul, 2018. "High temperature wettability studies for development of unmatched glass-metal joints in solar receiver tube," Renewable Energy, Elsevier, vol. 119(C), pages 282-289.
    7. Kumaresan, G. & Sudhakar, P. & Santosh, R. & Velraj, R., 2017. "Experimental and numerical studies of thermal performance enhancement in the receiver part of solar parabolic trough collectors," Renewable and Sustainable Energy Reviews, Elsevier, vol. 77(C), pages 1363-1374.
    8. Yılmaz, İbrahim Halil & Mwesigye, Aggrey & Kılıç, Fatih, 2023. "Prioritization of heat transfer fluids in parabolic trough solar systems using CFD-assisted AHP-VIKOR approach," Renewable Energy, Elsevier, vol. 210(C), pages 751-768.
    9. Ajbar, Wassila & Parrales, A. & Huicochea, A. & Hernández, J.A., 2022. "Different ways to improve parabolic trough solar collectors’ performance over the last four decades and their applications: A comprehensive review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 156(C).

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