Abstract

This chapter presents information relevant to the design and application of direct contact molten salt based phase change material (PCM) thermal storage for high temperatures. Given the limited research, many of the concepts and processes are examined at low temperatures. The focus of this concept is with gas-based heat transfer fluid, although conceptually, a liquid-based system is also presented. The experience associated with a classical direct contact arrangement at low temperature led to the development of a system which was tested at high temperature. It was demonstrated that mechanical design requirements and pumping losses are the most critical factors in developing direct contact PCM thermal storage systems. Experimental results are presented for testing conducted with water and sodium nitrate as PCMs.

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