Study on latent heat of fusion of ice in aqueous solutions |
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| Authors: | Hiroyuki Kumano Tatsunori Asaoka Akio Saito Seiji Okawa |
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| Affiliation: | aDepartment of Mechanical Sciences and Engineering, Graduate School of Science and Engineering, Tokyo Institute of Technology, 2-12-1, Ookayama, Meguro-ku, Tokyo 152-8552, Japan |
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| Abstract: | In this study, latent heat of fusion of ice in aqueous solutions was measured to understand latent heat of fusion of ice slurries. Propylene glycol, ethylene glycol, ethanol, NaCl and NaNO3 solutions were used as aqueous solutions. For measurements, pure ice was placed into solution, and temperature variations of the solution due to melting of ice were measured. Effective latent heat of fusion was calculated using an energy balance equation. Concentration of the solution varied due to ice melting, and dilution heat was considered. Therefore, latent heat of fusion of ice in aqueous solutions was predicted by considering the effects of dilution and freezing-point depression. We found that effective latent heat of fusion of ice decreased with increasing concentration of the solution, and effective latent heat of fusion was derived from latent heat of fusion of pure ice, effects of freezing-point depression, and dilution heat. |
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| Keywords: | Secondary refrigerant Ice slurry Aqueous solution Propylene glycol Ethylene glycol Sodium chloride Nitrate Sodium Measurement Latent heat Fusion CalculationMots clé s: Frigoporteur Coulis de glace Solution aqueuse Propylè ne glycol É thylè ne glycol Chlorure de sodium Nitrate Sodium Mesure Chaleur latente Fusion Calcul |
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