Electric-Thermal Energy Storage Using Solid Particles as Storage Media

Zhiwen Ma, Jeffrey Gifford, Xingchao Wang, Janna Martinek

Research output: Contribution to journalArticlepeer-review

1 Scopus Citations


A particle ETES system stores off-peak electricity as thermal energy and later dispatches high-value electricity on peak demand. This article introduces the particle ETES development, including novel components and power generation systems capable of supporting grid-scale LDES. A particle ETES system using inert, inexpensive (30$-40$/Ton) solid particles can store a large capacity of energy at high operating temperatures to drive high-performance power cycles for high electric storage efficiencies. Particle ETES systems are expected to have significantly lower capital costs than chemical or electrochemical energy storage methods such as hydrogen or lithium-ion batteries, and have siting flexibility relative to mechanical storage methods that rely on geological formations such as reservoirs for PSH or caverns for compressed air energy storage (CAES). Additionally, a particle TES system integrated with VRE can supply heat for buildings or industrial processes to displace fossil fuels for broad decarbonization.
Original languageAmerican English
Pages (from-to)843-848
Number of pages6
Issue number5
StatePublished - 2023

Bibliographical note

Publisher Copyright:
© 2023 Elsevier Inc.

NREL Publication Number

  • NREL/JA-5700-84673


  • decarbonization
  • fluidized bed
  • industry process heat
  • long duration energy storage
  • renewable energy
  • solid particles
  • thermal energy storage


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