Optimal design of combined two-tank latent and metal hydrides-based thermochemical heat storage systems for high-temperature waste heat recovery
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Date
2020
Journal Title
Journal ISSN
Volume Title
Publisher
Multidisciplinary Digital Publishing Institute (MDPI)
Abstract
The integration of thermal energy storage systems (TES) in waste-heat recovery applications
shows great potential for energy efficiency improvement. In this study, a 2D mathematical model
is formulated to analyze the performance of a two-tank thermochemical heat storage system using
metal hydrides pair (Mg2Ni/LaNi5), for high-temperature waste heat recovery. Moreover, the system
integrates a phase change material (PCM) to store and restore the heat of reaction of LaNi5. The effects
of key properties of the PCM on the dynamics of the heat storage system were analyzed. Then,
the TES was optimized using a genetic algorithm-based multi-objective optimization tool (NSGA-II),
to maximize the power density, the energy density and storage efficiency simultaneously
Description
Keywords
Metal hydride, Thermochemical heat storage, Waste heat recovery, Phase change materials, Energy efficiency
Citation
Nyamsi, S. N. (2020). Optimal design of combined two-tank latent and metal hydrides-based thermochemical heat storage systems for high-temperature waste heat recovery. Energies,13(6),4216