Optical analysis of solar energy tubular absorbers

C. Saltiel, M. Sokolov

Research output: Contribution to journalArticlepeer-review


The energy absorbed by a solar energy tubular receiver element for a single incident ray is derived. Two types of receiver elements were analyzed: (1) an inner tube with an absorbing coating surrounded by a semitransparent cover tube, and (2) a semitransparent inner tube filled with an absorbing fluid surrounded by a semitransparent cover tube. The formation of ray cascades in the semitransparent tubes is considered. A numerical simulation to investigate the influence of the angle of incidence, sizing, thickness, and coefficient of extinction of the tubes was performed. A comparison was made between receiver elements with and without cover tubes. Ray tracing analyses in which rays were followed within the tubular receiver element as well as throughout the rest of the collector were performed for parabolic and circular trough concentrating collectors.

Original languageEnglish
Pages (from-to)4033-4039
Number of pages7
JournalApplied Optics
Issue number22
StatePublished - 15 Nov 1982


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