Molten Chloride Technology Pathway to Meet the U.S. DOE SunShot Initiative with Gen3 CSP

Judith Vidal; Noah Klammer

doi:10.1063/1.5117601

Molten Chloride Technology Pathway to Meet the U.S. DOE SunShot Initiative with Gen3 CSP

Judith Vidal
, Noah Klammer

Building Technologies and Science Center

Research output: Contribution to conference › Paper › peer-review

59 Scopus Citations

Abstract

Third-generation (Gen3) concentrating solar power (CSP) technologies require a thermally stable and inexpensive fluid to be used for heat transfer and thermal energy storage. For Gen3 CSP plants, a molten salt composed of MgCl₂ - KCl - NaCl is a new candidate, but it is familiar enough to plants with existing molten-salt systems. To determine the best composition for the heat-transfer fluid, we mixed nine different ratios of the salts, dry/purified them following strict protocols, and tested them with a differential scanning calorimeter and a thermogravimetric analyzer. Our results showed that the lowest melting and solidification temperature of 385°C ± 1°C was determined for the eutectic composition 44.7 MgCl₂ - 25.8 KCl - 29.4 NaCl (mol.%). We determined that improper handling and preparation of the salt mixture highly affects its thermal properties because of moisture absorption. Preparation standards - particularly the dehydration of hydrous MgCl₂ - merit further development.

Original language	American English
Number of pages	9
DOIs	https://doi.org/10.1063/1.5117601 https://doi.org/10.1063/1.5117601
State	Published - 25 Jul 2019
Event	24th SolarPACES International Conference on Concentrating Solar Power and Chemical Energy Systems, SolarPACES 2018 - Casablanca, Morocco Duration: 2 Oct 2018 → 5 Oct 2018

Conference

Conference	24th SolarPACES International Conference on Concentrating Solar Power and Chemical Energy Systems, SolarPACES 2018
Country/Territory	Morocco
City	Casablanca
Period	2/10/18 → 5/10/18

Bibliographical note

Publisher Copyright:
© 2019 Author(s).

NLR Publication Number

NREL/CP-5500-74710

Keywords

associated liquids
concentrated solar power
differential scanning calorimetry
materials properties
thermal instruments

Access to Document

Cite this

@conference{8bb9910e8edb4509b72c214181695a7c,

title = "Molten Chloride Technology Pathway to Meet the U.S. DOE SunShot Initiative with Gen3 CSP",

abstract = "Third-generation (Gen3) concentrating solar power (CSP) technologies require a thermally stable and inexpensive fluid to be used for heat transfer and thermal energy storage. For Gen3 CSP plants, a molten salt composed of MgCl2 - KCl - NaCl is a new candidate, but it is familiar enough to plants with existing molten-salt systems. To determine the best composition for the heat-transfer fluid, we mixed nine different ratios of the salts, dry/purified them following strict protocols, and tested them with a differential scanning calorimeter and a thermogravimetric analyzer. Our results showed that the lowest melting and solidification temperature of 385°C ± 1°C was determined for the eutectic composition 44.7 MgCl2 - 25.8 KCl - 29.4 NaCl (mol.\%). We determined that improper handling and preparation of the salt mixture highly affects its thermal properties because of moisture absorption. Preparation standards - particularly the dehydration of hydrous MgCl2 - merit further development.",

keywords = "associated liquids, concentrated solar power, differential scanning calorimetry, materials properties, thermal instruments",

author = "Judith Vidal and Noah Klammer",

note = "Publisher Copyright: {\textcopyright} 2019 Author(s).; 24th SolarPACES International Conference on Concentrating Solar Power and Chemical Energy Systems, SolarPACES 2018 ; Conference date: 02-10-2018 Through 05-10-2018",

year = "2019",

month = jul,

day = "25",

doi = "10.1063/1.5117601",

language = "American English",

}

TY - CONF

T1 - Molten Chloride Technology Pathway to Meet the U.S. DOE SunShot Initiative with Gen3 CSP

AU - Vidal, Judith

AU - Klammer, Noah

PY - 2019/7/25

Y1 - 2019/7/25

N2 - Third-generation (Gen3) concentrating solar power (CSP) technologies require a thermally stable and inexpensive fluid to be used for heat transfer and thermal energy storage. For Gen3 CSP plants, a molten salt composed of MgCl2 - KCl - NaCl is a new candidate, but it is familiar enough to plants with existing molten-salt systems. To determine the best composition for the heat-transfer fluid, we mixed nine different ratios of the salts, dry/purified them following strict protocols, and tested them with a differential scanning calorimeter and a thermogravimetric analyzer. Our results showed that the lowest melting and solidification temperature of 385°C ± 1°C was determined for the eutectic composition 44.7 MgCl2 - 25.8 KCl - 29.4 NaCl (mol.%). We determined that improper handling and preparation of the salt mixture highly affects its thermal properties because of moisture absorption. Preparation standards - particularly the dehydration of hydrous MgCl2 - merit further development.

AB - Third-generation (Gen3) concentrating solar power (CSP) technologies require a thermally stable and inexpensive fluid to be used for heat transfer and thermal energy storage. For Gen3 CSP plants, a molten salt composed of MgCl2 - KCl - NaCl is a new candidate, but it is familiar enough to plants with existing molten-salt systems. To determine the best composition for the heat-transfer fluid, we mixed nine different ratios of the salts, dry/purified them following strict protocols, and tested them with a differential scanning calorimeter and a thermogravimetric analyzer. Our results showed that the lowest melting and solidification temperature of 385°C ± 1°C was determined for the eutectic composition 44.7 MgCl2 - 25.8 KCl - 29.4 NaCl (mol.%). We determined that improper handling and preparation of the salt mixture highly affects its thermal properties because of moisture absorption. Preparation standards - particularly the dehydration of hydrous MgCl2 - merit further development.

KW - associated liquids

KW - concentrated solar power

KW - differential scanning calorimetry

KW - materials properties

KW - thermal instruments

UR - https://www.scopus.com/pages/publications/85070632417

U2 - 10.1063/1.5117601

DO - 10.1063/1.5117601

M3 - Paper

AN - SCOPUS:85070632417

T2 - 24th SolarPACES International Conference on Concentrating Solar Power and Chemical Energy Systems, SolarPACES 2018

Y2 - 2 October 2018 through 5 October 2018

ER -

Molten Chloride Technology Pathway to Meet the U.S. DOE SunShot Initiative with Gen3 CSP

Abstract

Conference

Bibliographical note

NLR Publication Number

Keywords

Access to Document

Other files and links

Fingerprint

Cite this