Affiliation:
1. Lawrence Livermore National Laboratory, Livermore, CA 94550
Abstract
For nearly 150years, the cross section of the heat collection tubes used at the focus of parabolic trough solar concentrators has been circular. This type of tube is obviously simple and easily fabricated, but it is not optimal. It is shown in this article that the optimal shape, assuming a perfect parabolic figure for the concentrating mirror, is instead oblong and is approximately given by a pair of facing parabolic segments.
Subject
Energy Engineering and Power Technology,Renewable Energy, Sustainability and the Environment
Reference7 articles.
1. Price, H.
, “Concentrating Solar Power Systems Analysis and Implications,” slide 39, available at http://www1.eere.energy.gov/solar/pdfs/3solar_henryprice.pdf
2. Caustic and Its Use in Designing Optimal Absorber Shapes for 2D Concentrators;Ries
3. Theoretical Concentrations for Solar Furnaces;Cobble;Sol. Energy
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