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A device for measuring the angular distribution of incident radiation on tubular solar collectors

Author

Listed:
  • Cabanillas, R.E.
  • Estrada, C.A.
  • Avila, F.

Abstract

The calculation of the incident solar radiation falling upon tubular collectors presents difficulties which do not exist when this is carried out for flat plate collectors. Due to their cylindrical shape, the solar incident radiation on their surface is a function of angle and time. This paper presents experimental results which were obtained by means of a device specially designed in order to measure the distribution of such radiation. The device's sensor element (a photodiode) was characterised, calibrated and subsequently used to measure the angular distribution of radiation incident on the inside surface of the inner tube of an evacuated solar collector. It was found that the experimentally measured distribution agrees with that obtained by the ray-tracing method which appears in the literature.

Suggested Citation

  • Cabanillas, R.E. & Estrada, C.A. & Avila, F., 1995. "A device for measuring the angular distribution of incident radiation on tubular solar collectors," Renewable Energy, Elsevier, vol. 6(7), pages 843-847.
    • Handle: RePEc:eee:renene:v:6:y:1995:i:7:p:843-847
    DOI: 10.1016/0960-1481(94)00098-Q
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    Cited by:

    1. Jowzi, Mohammad & Veysi, Farzad & Sadeghi, Gholamabbas, 2018. "Novel experimental approaches to investigate distribution of solar insolation around the tubes in evacuated tube solar collectors," Renewable Energy, Elsevier, vol. 127(C), pages 724-732.
    2. Milani, Dia & Abbas, Ali, 2016. "Multiscale modeling and performance analysis of evacuated tube collectors for solar water heaters using diffuse flat reflector," Renewable Energy, Elsevier, vol. 86(C), pages 360-374.
    3. Zambolin, E. & Del Col, D., 2012. "An improved procedure for the experimental characterization of optical efficiency in evacuated tube solar collectors," Renewable Energy, Elsevier, vol. 43(C), pages 37-46.

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