Thermochemical energy storage with ammonia: Aiming for the sunshot cost target
2016
Thermochemical energy storage has the potential to reduce the cost of concentrating solar thermal power. This paper presents recent advances in ammonia-based thermochemical energy storage (TCES), supported by an award from the U.S. Dept. of Energy SunShot program. Advances have been made in three areas: identification of promising approaches for underground containment of the gaseous products of the dissociation reaction, demonstration that ammonia synthesis can be used to generate steam for a supercritical-steam Rankine cycle, and a preliminary design for integration of the endothermic reactors within a tower receiver. Based on these advances, ammonia-based TCES shows promise to meet the $15/kWht SunShot cost target.
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