In this study, we report enhancement in heat capacity of SiO2 nanoparticle dispersions in a molten ternary nitrate salt (NaNO3, KNO3, and Ca(NO3)2) to obtain an effective heat transfer fluid (HTF)/thermal energy storage (TES) for concentrated solar power (CSP) application. The enhanced heat capacity of the molten salt mixture is expected to greatly increase thermal storage density of HTF/TES, and thus the cost of electricity produced by CSP plant can be significantly reduced. A custom two-step method was used to synthesize SiO2 nanoparticle/ternary salt mixture. The nanoparticle concentration of the mixture was fixed at 1% by weight for comparison with the previous studies. A modulated differential scanning calorimeter (MDSC) was employed to measure heat capacity of the mixture, and it was found to be enhanced by ∼19% compared to the pure ternary salt.
Nanoparticle Dispersions on Ternary Nitrate Salts for Heat Transfer Fluid Applications in Solar Thermal Power
The University of Texas at Arlington,
Arlington, TX 76019-0023
Contributed by the Heat Transfer Division of ASME for publication in the JOURNAL OF HEAT TRANSFER. Manuscript received April 22, 2014; final manuscript received May 11, 2015; published online February 3, 2016. Assoc. Editor: Bruce L. Drolen.
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Devaradjane, R., and Shin, D. (February 3, 2016). "Nanoparticle Dispersions on Ternary Nitrate Salts for Heat Transfer Fluid Applications in Solar Thermal Power." ASME. J. Heat Transfer. May 2016; 138(5): 051901. https://doi.org/10.1115/1.4030903
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