h i g h l i g h t s Multifunctional test bench and indirect operated reactor developed and in operation. Proof of principal for a 10 kW, 20 kg calcium hydroxide thermochemical storage reactor. Several charge and discharge cycles were performed at adjustable storage temperatures.
The reversible reaction of calcium hydroxide (Ca(OH)2) to calcium oxide (CaO) and water vapor is well known in the context of thermochemical energy storage. Cheap material costs, a theoretically very high energy density and the potentially wide temperature range of the reaction imply that the storage system could be beneficial for many high temperature processes. For example the system could be applied to store and reutilize industrial waste heat or as an alternative storage solution in future concentrated solar power plants. Highlights Development of a novel indirectly heated reaction bed for thermochemical energy storage Experimental demonstration of thermal charging and discharging at low vapor pressures (1.4-20 kPa) Experimental study of the reaction at various heating and cooling loads of the heat transfer fluid Identification of operational limits under some technically relevant boundary conditions Highlights (for review)
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