Fluoride salts and container materials for thermal energy storage applications in the temperature range 973 to 1400 K

Conference · Thu Jan 01 04:00:00 EST 1987

OSTI ID:6051706

Misra, A K; Whittenberger, J D

Multicomponent fluoride salt mixtures were characterized for use as latent heat of fusion heat storage materials in advanced solar dynamic space power systems with operating temperatures in the range of 973 to 1400 K. The melting points and eutectic composition for many systems with published phase diagrams were verified, and several new eutectic compositions were identified. Additionally, the heats of fusion of several binary and ternary eutectics and congruently melting intermediate compounds were measured by differential scanning calorimetry. The extent of corrosion of various metals by fluoride melts was estimated from thermodynamic considerations, and equilibrium conditions inside a containment vessel were calculated as functions of the initial moisture content of the salt and free volume above the molten salt. Preliminary experimental data on the corrosion of commercial, high-temperature alloys in LiF-19.5CaF/sub 2/ and NaF-27CaF/sub 2/-36MgF/sub 2/ melts are presented and compared to the thermodynamic predictions.

• Research Organization: National Aeronautics and Space Administration, Cleveland, OH (USA). Lewis Research Center
• OSTI ID: 6051706
• Report Number(s): N-87-24026; NASA-TM-89913; E-3563; NAS-1.15:89913; AIAA-87-9226; CONF-870804-39
• Country of Publication: United States
• Language: English

Related Subjects

14 SOLAR ENERGY
140700* -- Solar Thermal Power Systems
25 ENERGY STORAGE
250800 -- Energy Storage-- Chemical
ALKALI METAL COMPOUNDS
ALKALINE EARTH METAL COMPOUNDS
CALCIUM COMPOUNDS
CALCIUM FLUORIDES
CALCIUM HALIDES
CALORIMETERS
CHEMICAL REACTIONS
CORROSION
CORROSIVE EFFECTS
DATA
ELECTRONIC EQUIPMENT
ENERGY STORAGE
EQUIPMENT
EUTECTICS
EXPERIMENTAL DATA
FLUORIDES
FLUORINE COMPOUNDS
HALIDES
HALOGEN COMPOUNDS
HEAT STORAGE
INFORMATION
LITHIUM COMPOUNDS
LITHIUM FLUORIDES
LITHIUM HALIDES
MAGNESIUM COMPOUNDS
MAGNESIUM FLUORIDES
MEASURING INSTRUMENTS
MELTING POINTS
MOLTEN SALTS
NUMERICAL DATA
PHYSICAL PROPERTIES
POWER PLANTS
POWER SUPPLIES
SALTS
SODIUM COMPOUNDS
SODIUM FLUORIDES
SOLAR POWER PLANTS
SOLAR THERMAL POWER PLANTS
SPACECRAFT POWER SUPPLIES
STORAGE
THERMAL POWER PLANTS
THERMODYNAMIC PROPERTIES
THERMODYNAMICS
TRANSITION TEMPERATURE