2006•Tokyo Tech Research Repository (Tokyo Institute of Technology)Requires access
Study on effective latent heat of fusion of ice slurries.
Tatsunori Asaoka, Hiroyuki Kumano, Akio Saito
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Abstract
The 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 the solution and temperature variations of the solution due to melting of ice were measured, and effective latent heat of fusion was calculated using an energy balance equation. The theoretical effective latent heat of fusion was also calculated with the consideration of concentration of the solution varied due to ice melting and dilution heat. Since the result of the theoretical calculation agrees with the result obtained from the measurement, it was clarified that the effective latent heat of fusion can be derived from the latent heat of fusion of pure ice, effects of freezing-point depression and dilution heat. Moreover, specific enthalpy and apparent specific heat of ice slurries could be obtained by the effective latent heat.