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Design Considerations in the Use of Glauber Salt for Energy Storage.

DE82019289

Publication Date	1981
Personal Author	Chadwick, D. G.; Sherwood, K. H.
Page Count	49
Abstract	Various design concepts for the utilization of the latent heat of Glauber salt at temperatures between 25 exp 0 C and 50 exp 0 C were studied. Consideration was given to system economics and what particular heat storage system if perfected would be most cost effective. The problems of limiting crystal size and heat transfer into and out of salt crystals is discussed. Crystal size is affected by the degree of agitation the salt solution experiences during the salt cooling process. Consequently, crystal size was moderated in a favorable way by introducing air bubbles at the bottom of the salt container. As the bubbles rise a mixing action occurs which limits crystal size and helps prohibit the accumulation of an anhydrous sludge that settles out of solution in the freezing-thawing process. (ERA citation 08:000399)
Keywords	Sodium sulfates Thermal energy storage equipment Latent heat storage Design Grain size Heat transfer Aeration Thermal conductivity Polyethylenes Temperature distribution Heat extraction Mathematical models Economics Experimental data Cooling Temperature dependence Theoretical data Decomposition ERDA/142000
Source Agency	Technical Information Center Oak Ridge Tennessee
NTIS Subject Category	97O - Miscellaneous Energy Conversion & Storage
Corporate Authors	Utah Water Research Lab., Logan.; Department of Energy, Washington, DC.
Document Type	Technical Report
NTIS Issue Number	198309

Design Considerations in the Use of Glauber Salt for Energy Storage.

Design Considerations in the Use of Glauber Salt for Energy Storage.
DE82019289

Publication Date	1981
Personal Author	Chadwick, D. G.; Sherwood, K. H.
Page Count	49
Abstract	Various design concepts for the utilization of the latent heat of Glauber salt at temperatures between 25 exp 0 C and 50 exp 0 C were studied. Consideration was given to system economics and what particular heat storage system if perfected would be most cost effective. The problems of limiting crystal size and heat transfer into and out of salt crystals is discussed. Crystal size is affected by the degree of agitation the salt solution experiences during the salt cooling process. Consequently, crystal size was moderated in a favorable way by introducing air bubbles at the bottom of the salt container. As the bubbles rise a mixing action occurs which limits crystal size and helps prohibit the accumulation of an anhydrous sludge that settles out of solution in the freezing-thawing process. (ERA citation 08:000399)
Keywords	Sodium sulfates Thermal energy storage equipment Latent heat storage Design Grain size Heat transfer Aeration Thermal conductivity Polyethylenes Temperature distribution Heat extraction Mathematical models Economics Experimental data Cooling Temperature dependence Theoretical data Decomposition ERDA/142000
Source Agency	Technical Information Center Oak Ridge Tennessee
NTIS Subject Category	97O - Miscellaneous Energy Conversion & Storage
Corporate Authors	Utah Water Research Lab., Logan.; Department of Energy, Washington, DC.
Document Type	Technical Report
NTIS Issue Number	198309