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

44 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).

NREL Publication Number

NREL/CP-5500-74710

Keywords

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

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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",

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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 - http://www.scopus.com/inward/record.url?scp=85070632417&partnerID=8YFLogxK

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

NREL Publication Number

Keywords

Access to Document

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