Abstract
Molten salts are being used as heat transfer fluids and thermal energy storage materials for concentrated solar power (CSP) plants. It is imperative to choose the right Heat Transfer Fluids (HTF) and equally important to have accurate data on the properties of the same to help in the design of a new HTF. Determining the thermophysical properties of these HTFs accurately is a challenging task as it incorporates experimentation at high temperatures, cost of running the experiments, and complexity due to material interactions. In this study, the authors have measured the density of Ca(NO3)2–NaNO3–KNO3 ternary salt. Generic Solution Model proposed by Chou was also used to predict the density of the ternary nitrate salt and has been demonstrated to work with reasonable accuracy. An effort was made to predict the density of calcium nitrate as its density is not measurable due to its volatile nature near its melting point. This value was used to model various ternaries containing calcium nitrate. These values were then compared to the corresponding modeled results using the calcium nitrate density previously predicted by Bradshaw. The modeled results using the current density were found to exhibit a lesser deviation with respect to experimental results.
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The authors would like to acknowledge the Department of Science and Technology (SERB/EMR/2016/002784) for funding the project.
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Shrotri, V., Muhmood, L. Experimental and Modeling Studies on Density of Ca(NO3)2–NaNO3–KNO3 Ternary Salts with Focus on Calcium Nitrate Density Prediction. Int J Thermophys 41, 85 (2020). https://doi.org/10.1007/s10765-020-02668-x
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DOI: https://doi.org/10.1007/s10765-020-02668-x