Development of composite latent/sensible heat storage media

Technical Report · Sat Dec 01 04:00:00 EST 1990

DOI:https://doi.org/10.2172/6050927· OSTI ID:6050927

Petri, Randy ^[1]; Ong, Estela T. ^[1]; Kardas, Alan ^[2]

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1. Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
2. Institute of Gas Technology, Chicago, IL (United States)

Results of an on-going program to develop a composite latent-sensible thermal energy storage medium, trade marked CompPhase^TM, are presented. The target application area was periodic kiln energy recovery. The concept is that of a composite salt/ceramic material processed such that the medium maintains its shape and mechanical integrity through the salt melting temperature. As such, the media can be fabricated into a variety of shapes suitable for packed beds, fluidized beds, or direct contact heat exchangers. The properties of ten carbonate salt or eutectic mixtures of carbonate salts were reviewed to select the most appropriate candidates for development. Three salts and two ceramic materials were evaluated in laboratory tests to select the final material, a composite of sodium-barium eutectic/magnesium oxide, for development. Two methods of processing the constituent powders for fabrication into storage pellets were developed, and one method was applied to pellet fabrication by commercial processing equipment. Two different preliminary cost estimates bracketed the expected cost of commercially fabricating storage pellets. Also, two modifications to the material processing method were suggested to reduce costs. Thermal cycling was conducted on laboratory produced experimental pellets and on prototype pellets fabricated by commercial processes. Detailed laboratory tests to determine composite mechanical and thermal properties were conducted. It is concluded that further laboratory, field, and economic studies are required before the concept of composite storage media can be considered fully developed for commercialization.

• Research Organization: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States); Institute of Gas Technology, Chicago, IL (United States)
• Sponsoring Organization: USDOE Office of Conservation & Renewable Energy (CE); USDOE Office of Federal Energy Management Programs (FEMP)
• DOE Contract Number: AC05-84OR21400
• OSTI ID: 6050927
• Report Number(s): ORNL/Sub--86-95001/1; ON: DE91005636
• Country of Publication: United States
• Language: English

Related Subjects

25 ENERGY STORAGE
250600* -- Energy Storage-- Thermal
36 MATERIALS SCIENCE
360601 -- Other Materials-- Preparation & Manufacture
360603 -- Materials-- Properties
ACOUSTIC EMISSION TESTING
ACOUSTIC TESTING
ALKALI METAL COMPOUNDS
ALKALINE EARTH METAL COMPOUNDS
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
BARIUM CARBONATES
BARIUM COMPOUNDS
BENCH-SCALE EXPERIMENTS
CALCINATION
CARBON COMPOUNDS
CARBONATES
CERAMICS
CHALCOGENIDES
CHEMICAL ANALYSIS
CHEMICAL REACTIONS
COMPACTING
COMPOSITE MATERIALS
COMPRESSION STRENGTH
COST ESTIMATION
CREEP
DECOMPOSITION
DENSITY
DRYING
ELECTRON MICROSCOPY
ENERGY RECOVERY
ENERGY STORAGE
ENTHALPY
EQUIPMENT
EUTECTICS
EVAPORATION
FABRICATION
FLUIDS
FUSION HEAT
GRAVIMETRIC ANALYSIS
HEAT RECOVERY
HEAT STORAGE
HEAT TRANSFER FLUIDS
IMPURITIES
KILNS
LATENT HEAT STORAGE
LOSSES
MAGNESIUM COMPOUNDS
MAGNESIUM OXIDES
MATERIALS
MATERIALS TESTING
MECHANICAL PROPERTIES
MELTING
MELTING POINTS
MICROSCOPY
MOLTEN SALTS
NONDESTRUCTIVE TESTING
OXIDES
OXYGEN COMPOUNDS
PELLETS
PERFORMANCE TESTING
PHASE STABILITY
PHASE TRANSFORMATIONS
PHYSICAL PROPERTIES
POROSITY
POTASSIUM CARBONATES
POTASSIUM COMPOUNDS
POWDERS
PYROLYSIS
QUANTITATIVE CHEMICAL ANALYSIS
RECOVERY
SALTS
SCANNING ELECTRON MICROSCOPY
SENSIBLE HEAT STORAGE
SHAPE
SINTERING
SODIUM CARBONATES
SODIUM COMPOUNDS
SPECIFIC HEAT
SPRAY DRYING
STABILITY
STORAGE
SURFACE AREA
SURFACE PROPERTIES
TESTING
THERMAL ANALYSIS
THERMAL CYCLING
THERMAL ENERGY STORAGE EQUIPMENT
THERMAL GRAVIMETRIC ANALYSIS
THERMOCHEMICAL PROCESSES
THERMODYNAMIC PROPERTIES
TRANSITION HEAT
TRANSITION TEMPERATURE
WEIGHT