DETERMINATION AND ANALYSIS OF THE POTENTIALITIES OF THERMAL ENERGY STORAGE MATERIALS
Abstract
Compatibility tests to find materials uitable for containing molten thermal energy storage materials have been completed. Fansteel-80 and boron nitride appear to be the most suitable materials for containing molten lithium metaborate. Aluminum oxide and boron nitride are the most promising containment materials for calcium silicide--no metals are satisfactory for this compound. The heat content measurements on calcium silicide were continued through the melting temperature. heat of fusion of calcium silicide was determined to be 245 ! 15 BTU/pound at the melting temperature of 1895 ! 55 F. Heat release rate measurements were made on lithium metaborate in the nickel block calorimeter. Results show a rapid drop in heat release rate as the fusion front moves from the outside wall of a cylindrical capsule toward the center. This indicates that a cylinder is not an efficient configuration for a thermal energy storage material container. Two values for the thermal conductivity of molten lithium metaborate are 3.2 and 3.8 BTU/hr-sq ft/ft. Attempts to measure the density and viscosity of molten calcium silicide failed. The density of solid calcium silicide was 2.5 grams/ml. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 30, 1962
- Accession Number
- AD0278186
Entities
People
- C.f. Boynton
- K.w. Beahm