STUDY ON FLUID LATENT HEAT STORAGE MATERIAL USING MULTI-COMPONENT MIXTURE
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Accession number;07A0043220
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| Title;STUDY ON FLUID LATENT HEAT STORAGE MATERIAL USING MULTI-COMPONENT MIXTURE |
| Author;
OKUBO HIDETOSHI
(Tamagawa Univ., JPN)
WATANABE SATOSHI
(Tamagawa Univ., Graduate School, JPN)
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Journal Title;Thermophys Prop
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Journal Code:X0031A
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ISSN:0911-1743
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VOL.27th;NO.;PAGE.54-56(2006)
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| Figure&Table&Reference;FIG.5, REF.5 |
| Pub. Country;Japan |
| Language;Japanese |
| Abstract;We have investigated the properties of two-phase flow for three-component mixture of solid and liquid, including a mono-dispersive suspension of polystyrene spheres in the aqueous solutions, urea-water mixture in solid-liquid phase, and ethanol-water mixture in solid-liquid phase. Multi-component mixtures such as aqueous solutions occur abundantly in nature and some of them are particularly useful for life and industry as safe materials for environment. When cooling a multi-component mixture, if cooling takes place past the solid-liquid co-existent region and below the solidus line temperature, the whole phase is transformed into a solid phase. However, this solid-liquid phase can be used as a fluid high-performance secondary refrigerant if it is possible to form a two-phase flow involving the two phases. A fluid regenerative material consisting of solid-liquid phases has a larger heat capacity than a secondary refrigerant of fluid alone. The apparent specific heat capacity of such a refrigerant will be larger because the latent heat will also come into play in the heat transport process in addition to the sensible heat. In the present study, we have investigated the properties of two-phase flow for multi-component mixture of solid and liquid as the latent heat, specific heat, viscosity and density. To evaluate the heat capacity of multi-component mixtures, we measured the latent heat and apparent specific heat. And to evaluate the fluidity of multi-component mixtures into solid-liquid phases, we measured as a function of volume fraction of the polystyrene particles in aqueous solutions, urea-water mixture, and ethanol-water mixture. The observed results were analyzed by the effective medium theory. (author abst.) |
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