Experimental Demonstration of a Latent Heat Storage System for Dispatchable Electricity: Paper No. 090022

Jeffrey Alleman, Gregory Glatzmaier, Philip Parilla, David Ginley, Eric Toberer, Jonathan Rea, Christopher Oshman, Corey Hardin, Abhishek Singh, Jeff Sharp, Nathan Siegel, Michele Olsen

Research output: Contribution to conferencePaper

3 Scopus Citations

Abstract

Modern electric grids that use intermittent renewables require energy storage to maintain reliability. Many potential solutions exist, but latent heat thermal energy storage shows particularly high potential for low cost grid scale energy storage. In this paper, we present the design and initial experimental results for a lab-scale prototype of a novel latent heat thermal storage system. This version of our prototype used 50 kg of aluminum-silicon alloy as a phase change material, and a novel valved thermosyphon concept to control heat flow from a thermal storage tank to thermoelectric generators for dispatchable electricity production. Our results validate the system: the thermal storage system was able to receive heat input, evenly distribute heat to and from the phase change material with small temperature gradients, and controllably dispatch heat to a heat engine for electricity generation on demand. With the basic principle of this technology demonstrated, our next step will be to evaluate and improve system efficiency.
Original languageAmerican English
Number of pages8
DOIs
StatePublished - 2018
EventSolarPACES 2017: International Conference on Concentrating Solar Power and Chemical Energy Systems - Santiago, Chile
Duration: 26 Sep 201729 Sep 2017

Conference

ConferenceSolarPACES 2017: International Conference on Concentrating Solar Power and Chemical Energy Systems
CitySantiago, Chile
Period26/09/1729/09/17

NREL Publication Number

  • NREL/CP-5H00-72963

Keywords

  • energy storage
  • latent heat
  • thermal storage

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