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IIR document

Estimating basic properties of ice slurries.

Number: pap. K01

Author(s) : MELINDER Å.

Summary

Aqueous solutions are used as single-phase secondary fluids in indirect refrigeration systems to transport energy and some of these fluids are suitable for certain two-phase ice slurry applications. Several requirements are to be fulfilled by an ideal ice slurry fluid such as energy transport, pumping power and heat transfer. This paper gives enhanced enthalpy phase diagrams as a function of additive mass fraction as well as other charts with equilibrium values of enthalpy change and ice mass fraction (both related to energy transport), density, viscosity (related to pumping power) and thermal conductivity (related to heat transfer), as function of freezing point for aqueous solutions of ethyl alcohol, ethylene glycol, propylene glycol and sodium chloride. Isothermal lines, that can represent operation temperatures, and lines for some temperature differences below the freezing point may help to determine the best choice of additive and operating conditions. These charts are based on properties of ice and of the aqueous solution as well as simple equations for liquids with solid spherical particles. A comparison is made of the four types of aqueous solution as ice slurry and single phase fluids. The fluid should also be non-corrosive, non-toxic, non-flammable, chemically stable and biodegradable.

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Pages: 12 p.

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Details

  • Original title: Estimating basic properties of ice slurries.
  • Record ID : 30004978
  • Languages: English
  • Source: 10th International Conference on Phase-Change Materials and Slurries for Refrigeration and Air Conditioning. Proceedings: Kobe, Japan, July 29-August 1, 2012.
  • Publication date: 2012/07/01

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