Study of safety aspects of high-temperature thermal-energy storage systems. Final report, 1 July 1975--31 December 1976. [Molten fluorides]

Technical Report · Wed Dec 01 00:00:00 EST 1976

OSTI ID:5232607

Boser, O

The safety aspects of thermal energy storage at high temperatures in fluoride mixtures were studied. An experimental thermal energy storage unit is described briefly, and the prevention of corrosion of the stainless steel container by doping the fluorides with aluminum is discussed. Experiments that illustrate the fire hazard of molten fluorides are described. No chemical reactions with various materials, including materials to extinguish fires, were observed. The fluoride mixture was found to dissolve in water at a rate of 2.6 g/100 ml of water which is less than the 4 g/100 ml of water for pure NaF. In addition, specimens were ruptured to simulate the situation in the case of residential home heating and automotive propulsion. In the first case only fluorides were used. In the second case fluorides and sodium were combined, the latter simulating the heat pipe. It was found that sodium has to be contained safely, whereas the fluorides are very stable and do not react with insulation material. No spreading of the liquid fluorides can occur since they freeze very rapidly.

• Research Organization: Philips Labs., Briarcliff Manor, N.Y. (USA)
• OSTI ID: 5232607
• Report Number(s): TID-27940
• Country of Publication: United States
• Language: English

Related Subjects

25 ENERGY STORAGE
THERMAL ENERGY STORAGE EQUIPMENT
SAFETY
CALCIUM FLUORIDES
CORROSION
MAGNESIUM FLUORIDES
MOLTEN SALTS
SODIUM FLUORIDES
ALKALI METAL COMPOUNDS
ALKALINE EARTH METAL COMPOUNDS
CALCIUM COMPOUNDS
CALCIUM HALIDES
CHEMICAL REACTIONS
EQUIPMENT
FLUORIDES
FLUORINE COMPOUNDS
HALIDES
HALOGEN COMPOUNDS
MAGNESIUM COMPOUNDS
SALTS
SODIUM COMPOUNDS
250600* - Energy Storage- Thermal