Advanced latent heat storage media for high-temperature industrial applications

Conference · Sun Jan 01 04:00:00 EST 1984

OSTI ID:6589633

Olszewski, M

Several advanced thermal energy storage (TES) media are being developed for high-temperature industrial applications as part of the Oak Ridge National Laboratory (ORNL) TES Program. One of these concepts involves a composite medium consisting of a phase-change carbonate salt supported and immobilized within a submicron-sized capillary structure of a particulate ceramic matrix or porous sintered ceramic. Immobilization of the molten salt within the ceramic structure permits operation of the composite pellets, bricks, or other shapes in direct contact with compatible fluids. Energy storage occurs in both sensible and latent forms with the composite providing higher energy storage densities than standard sensible heat storage systems. The second concept centers on the development of a self-encapsulating metallic eutectic. This work focuses on metallic eutectics containing silicon. Starting with a silicon-rich mixture, it is feasible to develop a self-encapsulating pellet by cooling the liquid drops at a controlled rate. A solid of nearly pure silicon will form on the exterior of the pellet leaving a eutectic, phase-change media in the interior. This paper describes the concepts and provides information concerning current development activities.

• Research Organization: Oak Ridge National Lab., TN (USA)
• DOE Contract Number: AC05-84OR21400
• OSTI ID: 6589633
• Report Number(s): CONF-8403146-4; ON: DE85000907
• Country of Publication: United States
• Language: English

Related Subjects

25 ENERGY STORAGE
250600* -- Energy Storage-- Thermal
CARBON COMPOUNDS
CARBONATES
CERAMICS
ECONOMICS
ELEMENTS
ENCAPSULATION
ENERGY STORAGE
EUTECTICS
HEAT STORAGE
LATENT HEAT STORAGE
MATERIALS
MOLTEN SALTS
OXYGEN COMPOUNDS
PHASE CHANGE MATERIALS
RESEARCH PROGRAMS
SALTS
SEMIMETALS
SILICON
STORAGE