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Title: Solar Thermoelectricity via Advanced Latent Heat Storage

We report on a new modular, dispatchable, and cost-effective solar electricity-generating technology. Solar ThermoElectricity via Advanced Latent heat Storage (STEALS) integrates several state-of-the-art technologies to provide electricity on demand. In the envisioned STEALS system, concentrated sunlight is converted to heat at a solar absorber. The heat is then delivered to either a thermoelectric (TE) module for direct electricity generation, or to charge a phase change material for thermal energy storage, enabling subsequent generation during off-sun hours, or both for simultaneous electricity production and energy storage. The key to making STEALS a dispatchable technology lies in the development of a 'thermal valve,' which controls when heat is allowed to flow through the TE module, thus controlling when electricity is generated. The current project addresses each of the three major subcomponents, (i) the TE module, (ii) the thermal energy storage system, and (iii) the thermal valve. The project also includes system-level and techno- economic modeling of the envisioned integrated system and will culminate in the demonstration of a laboratory-scale STEALS prototype capable of generating 3kWe.
Authors:
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Publication Date:
OSTI Identifier:
1257757
Report Number(s):
NREL/CP-5K00-66643
DOE Contract Number:
AC36-08GO28308
Resource Type:
Conference
Resource Relation:
Conference: Presented at SOLARPACES 2015: International Conference on Concentrating Solar Power and Chemical Energy Systems, 13-16 October 2015, Cape Town, South Africa; Related Information: Proceedings of SOLARPACES 2015: International Conference on Concentrating Solar Power and Chemical Energy Systems, 13-16 October 2015, Cape Town, South Africa
Publisher:
Melville, NY: AIP Publishing
Research Org:
NREL (National Renewable Energy Laboratory (NREL), Golden, CO (United States))
Sponsoring Org:
U.S. Department of Energy, Advanced Research Projects Agency-Energy (ARPA-E)
Country of Publication:
United States
Language:
English
Subject:
14 SOLAR ENERGY; 25 ENERGY STORAGE energy storage; latent heat; electric currents; materials modification