Molten Salt vs. Liquid Sodium Receiver Selection Using the Analytic Hierarchy Process: Paper No. 110016

Craig Turchi, Cara Libby, John Pye, Joe Coventry

Research output: Contribution to conferencePaper

1 Scopus Citations

Abstract

An international team led by NREL analyzed the favorability of two alternative liquid receiver designs for a 700+ degrees C receiver under the Gen3 CSP Liquid Pathway project. The competing liquid heat transfer fluids were a ternary chloride salt and liquid-metal sodium. The team applied a facilitated analytic hierarchy process (AHP) to arrive at a recommended alternative and set a path forward for the project. The AHP criteria were formulated, weighted, and scored by the project leadership team and technical advisory committee consisting of energy industry and CSP experts. The six- month process culminated with a two-day workshop where the sodium alternative was deemed to have both a significantly higher benefit (19.3%) and a lower LCOE (11.4%), with only a slightly higher risk (~3%) than the salt alternative. Consequently, a sodium-receiver design was selected for the Liquid Pathway project, where it will be used to charge a two- tank chloride salt thermal energy storage system.
Original languageAmerican English
Number of pages10
DOIs
StatePublished - 2022
EventSOLARPACES 2020: 26th International Conference on Concentrating Solar Power and Chemical Energy Systems - Freiburg, Germany
Duration: 28 Sep 20202 Oct 2020

Conference

ConferenceSOLARPACES 2020: 26th International Conference on Concentrating Solar Power and Chemical Energy Systems
CityFreiburg, Germany
Period28/09/202/10/20

Bibliographical note

See NREL/CP-5500-77913 for preprint

NREL Publication Number

  • NREL/CP-5700-83286

Keywords

  • analytic hierarchy process
  • CSP
  • liquid sodium
  • molten salt
  • solar receiver

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