Abstract

Following a brief historical introduction, the paper points out the need for solar energy to supplement fossil fuels and nuclear power. The nature of solar radiation is described, and methods are given for estimating the amount available at any particular location. Flat-plate and concentrating collectors are discussed, and recent technical advances are reported, including selective surface coatings and new tube-in-sheet materials. Cycles and prime movers are considered. Need for water in vapor-cycle condensers indicates usefulness of hot-air engines. High thermal efficiency is advocated as a means for reducing fixed charges by cutting size of collectors and rejectors.

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