HIGH THERMAL ENERGY STORAGE DENSITY LiNO3-NaNO3-KNO3-NO2 QUATERNARY MOLTEN SALT FOR PARABOLIC TROUGH SOLAR POWER GENERATION | Health & Environmental Research Online (HERO)

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Citation
Tags

HERO ID

2291119

Reference Type

Journal Article

Title

HIGH THERMAL ENERGY STORAGE DENSITY LiNO3-NaNO3-KNO3-NO2 QUATERNARY MOLTEN SALT FOR PARABOLIC TROUGH SOLAR POWER GENERATION

Author(s)

Wang, T; Mantha, D; Reddy, RG

Year

2012

Page Numbers

73-84

Web of Science Id

WOS:000322799600010

Abstract

A new eutectic LiNO3-NaNO3-KNO3-KNO2 quaternary molten salt system was calculated using thermodynamic modeling. The eutectic temperature was predicted to be 100 degrees C. The melting point and heat capacity of the salt eutectic composition were determined using DSC. The experimentally determined melting point is in excellent agreement with the predicted value. The melting point is more than 124 degrees C lower than that of the KNO3-NaNO3 solar salt. The density of the molten salt was experimentally determined as function of temperature. Using the density, heat capacity and the melting point, thermal energy storage density and gravimetric storage density of the quaternary molten salt were calculated and compared with that of solar salt. The larger storage density value of this molten salt indicates that this salt has a better energy storage capacity for solar power generation systems.

Keywords

DSC; LiNO3-NaNO3-KNO3-KNO2 quaternary system; melting point; heat capacity; thermodynamic properties; density; thermal energy storage density