OTIMIZAÇÃO DO COMPRIMENTO DE COLETORES PARABÓLICOS LINEARES EM SISTEMAS SOLAR TERMOELÉTRICOS
DOI:
https://doi.org/10.59627/cbens.2014.2215Keywords:
Solar Energy, Solar Concentrator, Parabolic Trough, Collector lengthAbstract
This paper presents an optimization study of the efficiency of parabolic trough collectors, regarding the configuration of rows (length of row). It have been simulated row configurations from 1 up to 55 collectors of the model LS - 2 ( 47.1 m to 2590.5 m ) in series, as arranged in a solar thermal power plant . The variation of the conversion efficiency of solar energy into net electricity (gross energy less electricity for pumping along the row ) is studied. The influence of the length of the row of collectors cannot be overstated. Rows very short do not take advantage of lower radiation values due to the need to reduce the flow of heat transfer fluid and, consequently, the exchange coefficient, while very long rows, increase excessively the pressure drop in the flow. It is shown that there is an optimum value, but with a broad plateau around this maximum, in which the variation in efficiency due to the length of the row is very small, which allows flexibility in the choice of this length in order to adjust the other operational variables.
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References
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