TY – JOUR
T1 – Experimental Study of Eutectic Molten Salts NaCl/KCl/ZnCl2 Heat Transfer Inside a Smooth Tube for High-Temperature Application
AU – Zhang, Ye
AU – Wang, Xiaoxin
AU – Hu, Qichao
AU – Li, Peiwen
AU – Liu, Qibin
AU – Xu, Ben
N1 – Publisher Copyright: Copyright © 2022 by ASME.
PY – 2022/8
Y1 – 2022/8
N2 – Eutectic salts NaCl-KCl-ZnCl2 and NaCl-KCl-MgCl2 are two of the chloride salt systems that are promising for being used as high-temperature heat transfer fluid (HTF) and thermal energy storage (TES) materials in a wide range of temperatures from 230 °C to 750 °C in concentrated solar thermal power systems. To conduct measurement of the heat transfer coefficient of the molten salt at high temperatures, a circulation system and instrumentation of flow and heat transfer was constructed. Experimental measurement of the convective heat transfer coefficients of NaCl-KCl-ZnCl2 (molar fraction: 13.8-41.9-44.3%) inside tubes has been accomplished to find the most suitable heat transfer correlations. Experience of salt processing and operation of the high-temperature heat transfer test system was obtained. Two correlations, Dittus-Boelter equation and Gnielinski’s correlation for Nusselt number against Reynolds number and Prandtl number, are evaluated using the test results, and the latter correlation is recommended due to its better agreement of prediction against tested data.
AB – Eutectic salts NaCl-KCl-ZnCl2 and NaCl-KCl-MgCl2 are two of the chloride salt systems that are promising for being used as high-temperature heat transfer fluid (HTF) and thermal energy storage (TES) materials in a wide range of temperatures from 230 °C to 750 °C in concentrated solar thermal power systems. To conduct measurement of the heat transfer coefficient of the molten salt at high temperatures, a circulation system and instrumentation of flow and heat transfer was constructed. Experimental measurement of the convective heat transfer coefficients of NaCl-KCl-ZnCl2 (molar fraction: 13.8-41.9-44.3%) inside tubes has been accomplished to find the most suitable heat transfer correlations. Experience of salt processing and operation of the high-temperature heat transfer test system was obtained. Two correlations, Dittus-Boelter equation and Gnielinski’s correlation for Nusselt number against Reynolds number and Prandtl number, are evaluated using the test results, and the latter correlation is recommended due to its better agreement of prediction against tested data.
KW – heat transfer
KW – measurement
KW – solar
KW – testing
UR – https://www.scopus.com/pages/publications/85144545827
UR – https://www.scopus.com/pages/publications/85144545827#tab=citedBy
U2 – 10.1115/1.4053974
DO – 10.1115/1.4053974
M3 – Article
AN – SCOPUS:85144545827
SN – 0199-6231
VL – 144
JO – Journal of Solar Energy Engineering, Transactions of the ASME
JF – Journal of Solar Energy Engineering, Transactions of the ASME
IS – 4
M1 – 044501
ER –