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Semi-empirical Density Estimations for Binary, Ternary and Multicomponent Alkali Nitrate–Nitrite Molten Salt Mixtures
- Publication Year :
- 2018
-
Abstract
- For sensible thermal energy storage in Concentrating Solar Power (CSP) plants, a molten salt mixture of 60 wt% sodium nitrate (NaNO3) and 40 wt% potassium nitrate (KNO3), known as Solar Salt, is commonly utilized. The paper presents semi-empirical estimation results of the density of Solar Salt and alternative molten salt mixtures with low melting temperatures in a range from 70 °C to 140 °C. These mixtures are Hitec, HitecXL, LiNO3–KNO3–NaNO3 and a multicomponent mixture. The paper shows that density values of mixtures can be closely predicted from single salt densities. The paper examines different estimation rules for mixtures. The quasilinear volumetric additivity rule (QVAR) is known for ternary reciprocal systems. For the first time, the presented work extends the QVAR to multicomponent mixtures. Temperature-dependent densities of selected salt mixtures of the system Ca,Li,K,Na//NO2,NO3 were estimated. Estimations are motivated by a fast and reliable method compared to time-consuming and error-prone measurements of several mixtures.
- Subjects :
- chemistry.chemical_classification
Work (thermodynamics)
Materials science
Concentrating Solar Power (CSP) · Hitec · HitecXL · Multicomponent salts · Quasilinear volumetric additivity rule
Analytical chemistry
Thermische Prozesstechnik
Salt (chemistry)
Potassium nitrate
02 engineering and technology
021001 nanoscience & nanotechnology
Condensed Matter Physics
Alkali metal
Thermal energy storage
chemistry.chemical_compound
020401 chemical engineering
chemistry
Sodium nitrate
0204 chemical engineering
Molten salt
0210 nano-technology
Ternary operation
Subjects
Details
- Language :
- German
- Database :
- OpenAIRE
- Accession number :
- edsair.doi.dedup.....2eca5f12006c7e6a4abe142372dd91fc