Use of a calcium potassium nitrate salt for the manufacture of a heat transfer fluid
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United States of America Patent
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Apr 3, 2018
Grant Date -
Dec 3, 2015
app pub date -
Sep 17, 2013
filing date -
Sep 18, 2012
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Abstract
The present invention relates to the use of a double salt of Ca(NO3)2 and KNO3 for the manufacture of a melt, in particular a nitrate-based heat transfer fluid (HTF) and/or thermal energy storage fluid, for example in solar energy applications, such as in solar electrical power plant systems using a parabolic through, a central receiver or a linear Fresnel, which have both a low melting temperature and a high decomposition temperature, as well as to methods for the manufacture thereof. Using said double salt, a melt could be manufactured comprising at least NaNO3, KNO3 and Ca(NO3)2, preferably, an eutectic ternary melt comprising Ca(NO3)2, NaNO3 and KNO3 in a weight ratio of about 42:15:43 with an operating temperature of about 131° C. to about 560° C.
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