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

R. E. Cabanillas, C. A. Estrada, F. Avila

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

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. © 1995.
Original languageAmerican English
Pages (from-to)843-847
Number of pages5
JournalRenewable Energy
DOIs
StatePublished - 1 Jan 1995

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