Basic properties of eutectic chloride salts NaCl-KCl-ZnCl2 and NaCl-KCl-MgCl2 as HTFs and thermal storage media measured using simultaneous DSC-TGA

Xu, Xiankun; Dehghani, Ghazal; Ning, Juexiao; Li, Peiwen

doi:10.1016/j.solener.2018.01.067

Basic properties of eutectic chloride salts NaCl-KCl-ZnCl₂ and NaCl-KCl-MgCl₂ as HTFs and thermal storage media measured using simultaneous DSC-TGA

Journal Article · Tue Feb 13 00:00:00 EST 2018 · Solar Energy

DOI:https://doi.org/10.1016/j.solener.2018.01.067· OSTI ID:1538838

Xu, Xiankun ^[1]; Dehghani, Ghazal ^[2]; Ning, Juexiao ^[2]; ^[2]

Univ. of Arizona, Tucson, AZ (United States); DOE/OSTI
Univ. of Arizona, Tucson, AZ (United States)

Concentrated solar power (CSP) technologies tend to work at high temperatures for better energy efficiency, which need high temperature heat transfer fluids (HTF) and thermal storage. A good HTF should have low melting point and be thermally stable at high temperatures. A thermal storage medium needs a high heat capacity in order to store more energy in per unit of mass or volume. The objective of this work is to study the basic thermophysical properties of several eutectic molten salts for HTF and thermal storage media, which can work at upper limit temperatures of 850 °C. The eutectic salts are mixtures by NaCl-KCl-ZnCl₂, and by NaCl-KCl-MgCl₂, respectively. The heat capacity, melting point, and heat of fusion of the eutectic salts at different temperatures were measured using Differential Scanning Calorimetry (DSC) and Thermal Gravimetric Analysis (TGA) simultaneously. Details of the measurements and obtained experience of operating the equipment are provided in the work. For each of the eutectic salts multiple samples were tested to check repeatability and to minimize random errors. Finally, in theoretical analysis, mixing rules from literature was used to estimate the heat capacity of the new HTFs, which showed good agreement with experimental data.

View Accepted Manuscript (DOE)

Research Organization:: Univ. of Arizona, Tucson, AZ (United States)

Sponsoring Organization:: USDOE; USDOE Office of Energy Efficiency and Renewable Energy (EERE)

Grant/Contract Number:: EE0005942

OSTI ID:: 1538838

Alternate ID(s):: OSTI ID: 1720178

Journal Information:: Solar Energy, Journal Name: Solar Energy Journal Issue: C Vol. 162; ISSN 0038-092X

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

References (23)

Heat capacity of indium from 300 to 1000 K: Enthalpy of fusion Grønvold, F. Journal of Thermal Analysis, Vol. 13, Issue 3 https://doi.org/10.1007/BF01912382	journal	June 1978
Post-test corrosion analysis of high-temperature thermal energy storage capsules Fathollahnejad, H.; Tsao, B. - H.; Ponnappan, R. Journal of Materials Engineering and Performance, Vol. 2, Issue 1 https://doi.org/10.1007/BF02649685	journal	February 1993
Some calculations methods for estimation of thermodynamical and thermochemical properties of inorganic compounds Moiseev, G. K.; Sestak, J. Progress in Crystal Growth and Characterization of Materials, Vol. 30, Issue 1 https://doi.org/10.1016/0960-8974(95)00011-U	journal	January 1995
Vapor pressure and corrosivity of ternary metal-chloride molten-salt based heat transfer fluids for use in concentrating solar power systems Vignarooban, K.; Xu, Xinhai; Wang, K. Applied Energy, Vol. 159 https://doi.org/10.1016/j.apenergy.2015.08.131	journal	December 2015
Thermodynamic evaluation of liquid metals as heat transfer fluids in concentrated solar power plants Pacio, J.; Singer, Cs.; Wetzel, Th. Applied Thermal Engineering, Vol. 60, Issue 1-2 https://doi.org/10.1016/j.applthermaleng.2013.07.010	journal	October 2013
Molten salts database for energy applications Serrano-López, R.; Fradera, J.; Cuesta-López, S. Chemical Engineering and Processing: Process Intensification, Vol. 73 https://doi.org/10.1016/j.cep.2013.07.008	journal	November 2013
Thermodynamic evaluation and optimization of the (NaCl+KCl+MgCl2+CaCl2+ZnCl2) system Robelin, Christian; Chartrand, Patrice The Journal of Chemical Thermodynamics, Vol. 43, Issue 3 https://doi.org/10.1016/j.jct.2010.10.013	journal	March 2011
Heat-transport properties of molten fluorides: Determination from first-principles Salanne, Mathieu; Simon, Christian; Turq, Pierre Journal of Fluorine Chemistry, Vol. 130, Issue 1 https://doi.org/10.1016/j.jfluchem.2008.07.013	journal	January 2009
Evaluating physical properties of molten salt reactor fluoride mixtures Khokhlov, Vladimir; Ignatiev, Victor; Afonichkin, Valery Journal of Fluorine Chemistry, Vol. 130, Issue 1 https://doi.org/10.1016/j.jfluchem.2008.07.018	journal	January 2009
Thermal and physical properties of molten fluorides for nuclear applications van der Meer, J. P. M.; Konings, R. J. M. Journal of Nuclear Materials, Vol. 360, Issue 1 https://doi.org/10.1016/j.jnucmat.2006.08.010	journal	January 2007
Thermal energy storage technologies and systems for concentrating solar power plants Kuravi, Sarada; Trahan, Jamie; Goswami, D. Yogi Progress in Energy and Combustion Science, Vol. 39, Issue 4 https://doi.org/10.1016/j.pecs.2013.02.001	journal	August 2013
Performance model for parabolic trough solar thermal power plants with thermal storage: Comparison to operating plant data Llorente García, Isabel; Álvarez, José Luis; Blanco, Daniel Solar Energy, Vol. 85, Issue 10 https://doi.org/10.1016/j.solener.2011.07.002	journal	October 2011
Comparison of different solar plants based on parabolic trough technology Giostri, Andrea; Binotti, Marco; Astolfi, Marco Solar Energy, Vol. 86, Issue 5 https://doi.org/10.1016/j.solener.2012.01.014	journal	May 2012
Assessment of liquid metal technology status and research paths for their use as efficient heat transfer fluids in solar central receiver systems Pacio, J.; Wetzel, Th. Solar Energy, Vol. 93 https://doi.org/10.1016/j.solener.2013.03.025	journal	July 2013
Thermal energy storage for solar-powered organic Rankine cycle engines Casati, E.; Galli, A.; Colonna, P. Solar Energy, Vol. 96 https://doi.org/10.1016/j.solener.2013.07.013	journal	October 2013
Minimum system entropy production as the FOM of high temperature heat transfer fluids for CSP systems Zhang, Ye; Li, Peiwen Solar Energy, Vol. 152 https://doi.org/10.1016/j.solener.2017.03.021	journal	August 2017
Heat capacity and glass transition thermodynamics for zinc chloride. A failure of the first Davies-Jones relation for dTg/dP Angell, C. A.; Williams, E.; Rao, K. J. The Journal of Physical Chemistry, Vol. 81, Issue 3 https://doi.org/10.1021/j100518a011	journal	February 1977
Simple method for the calculation of heat capacities of liquid mixtures Teja, Amyn S. Journal of Chemical & Engineering Data, Vol. 28, Issue 1 https://doi.org/10.1021/je00031a025	journal	January 1983
Development of a Molten-Salt Thermocline Thermal Storage System for Parabolic Trough Plants Pacheco, James E.; Showalter, Steven K.; Kolb, William J. Journal of Solar Energy Engineering, Vol. 124, Issue 2, p. 153-159 https://doi.org/10.1115/1.1464123	journal	January 2002
Assessment of a Molten Salt Heat Transfer Fluid in a Parabolic Trough Solar Field Kearney, D.; Herrmann, U.; Nava, P. Journal of Solar Energy Engineering, Vol. 125, Issue 2 https://doi.org/10.1115/1.1565087	journal	May 2003
Testing of Thermocline Filler Materials and Molten-Salt Heat Transfer Fluids for Thermal Energy Storage Systems in Parabolic Trough Power Plants Brosseau, Doug; Kelton, John W.; Ray, Daniel Journal of Solar Energy Engineering, Vol. 127, Issue 1 https://doi.org/10.1115/1.1824107	journal	February 2005
Thermal and Transport Properties of NaCl–KCl–ZnCl2 Eutectic Salts for New Generation High-Temperature Heat-Transfer Fluids Li, Peiwen; Molina, Edgar; Wang, Kai Journal of Solar Energy Engineering, Vol. 138, Issue 5 https://doi.org/10.1115/1.4033793	journal	June 2016
Physical Properties of Molten-Salt Reactor Fuel, Coolant, and Flush Salts. Cantor, S. https://doi.org/10.2172/4492893	report	October 1968

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Basic properties of eutectic chloride salts NaCl-KCl-ZnCl2 and NaCl-KCl-MgCl2 as HTFs and thermal storage media measured using simultaneous DSC-TGA

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Basic properties of eutectic chloride salts NaCl-KCl-ZnCl₂ and NaCl-KCl-MgCl₂ as HTFs and thermal storage media measured using simultaneous DSC-TGA