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Low cost high accuracy parabolic troughs construction and evaluation

Author

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  • Kalogirou, Soteris
  • Eleftheriou, Polyvios
  • Lloyd, Stephen
  • Ward, John

Abstract

This paper describes a low cost method for mass-production of parabolic surfaces with fibreglass. Cavities produced with plastic conduits, covered with fibreglass at the back of the collector surface, provide reinforcement in the longitudinal and transverse directions, to increase rigidity. This produces a low-cost high-rigidity structure that is an accurate copy of the mould. The accuracy of the parabolic surface depends on the accuracy of the mould. The details of the mould production and the procedure for producing the parabolic surface are presented. The total thickness of the fibreglass is 4mm (mean value). The inside surface where the reflector is fixed is manufactured to a high degree of surface finish. The cost of the surface is US$ 30 per square metre of aperture area for 90° rim angle. The standard deviation of the distribution of the parabolic surface errors is found equal to 4.7 mrad which indicates a very accurate surface. The deflection of the surface to a force corresponding to a wind velocity of 90 MPH is well within reasonable limits.

Suggested Citation

  • Kalogirou, Soteris & Eleftheriou, Polyvios & Lloyd, Stephen & Ward, John, 1994. "Low cost high accuracy parabolic troughs construction and evaluation," Renewable Energy, Elsevier, vol. 5(1), pages 384-386.
    • Handle: RePEc:eee:renene:v:5:y:1994:i:1:p:384-386
    DOI: 10.1016/0960-1481(94)90401-4
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    Citations

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    Cited by:

    1. Coccia, Gianluca & Di Nicola, Giovanni & Sotte, Marco, 2015. "Design, manufacture, and test of a prototype for a parabolic trough collector for industrial process heat," Renewable Energy, Elsevier, vol. 74(C), pages 727-736.
    2. Reddy, K.S. & Singla, Hitesh & Natraj,, 2019. "Gravity & wind load analysis and optical study of solar parabolic trough collector with composite facets using optimized modelling approach," Energy, Elsevier, vol. 189(C).
    3. Kalogirou, Soteris, 1996. "Parabolic trough collector system for low temperature steam generation: Design and performance characteristics," Applied Energy, Elsevier, vol. 55(1), pages 1-19, September.
    4. Kalogirou, Soteris, 1997. "Design, construction, performance evaluation and economic analysis of an integrated collector storage system," Renewable Energy, Elsevier, vol. 12(2), pages 179-192.
    5. Natraj, & Rao, B.N. & Reddy, K.S., 2021. "Wind load and structural analysis for standalone solar parabolic trough collector," Renewable Energy, Elsevier, vol. 173(C), pages 688-703.

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