Abstract
There are two main criteria for classifying solar receivers, namely, geometric design and adapted heat transfer fluid. Based on geometric factors, receivers fall into five classes: tubular, volumetric, microchannel, linear and point focus, and external and cavity receivers. Tubular and volumetric receivers are in the most advanced developmental stage. Point focus receivers can attain higher outlet temperature (>1000K) of the heat transfer fluid than the linear focus variety, and they are exploited in solar tower and parabolic dish power plants. Based on the adapted heat transfer fluid, receivers are classified into three major categories: gas, liquid, and particle. Gas receivers can further be classified into pressurized and supercritical categories. Most of the operating concentrating solar power use molten salt as a heat transfer fluid to indirectly generate steam. Particle receivers are an emerging concept. In this chapter, different classes of receivers are presented and discussed in detail.
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