Using property values of aqueous solutions and ice to estimate ice concentrations and enthalpies of ice slurries

• Published in: International journal of refrigeration Vol. 28; no. 1; pp. 13 - 19
• Main Authors: Melinder, Å., Granryd, E.
• Format: Journal Article
• Language: English
• Published: Oxford Elsevier Ltd 2005; Elsevier Science
• Subjects: Alcohol; Alcool; Applied sciences; Aqueous solution; Chaleur massique; Concentration; Coulis de glace; Energy; Energy. Thermal use of fuels; Engineering mechanics; Exact sciences and technology; Frigoporteur diphasique; Heat capacity; Ice slurry; Mechanical and thermal engineering; Mekanisk och termisk energiteknik; Physical property; Potassium; Proprie´te´ physique; Proprie´te´ thermique; Propyle`ne glycol; Propylene glycol; Refrigerating engineering; Refrigerating engineering. Cryogenics. Food conservation; Solution aqueuse; TECHNOLOGY; TEKNIKVETENSKAP; Teknisk mekanik; Temperature; Tempe´rature; Thermal property; Two-phase secondary refrigerant; Physical property; Proprie´te´ physique; Propylene glycol; Thermal property; Temperature; Solution aqueuse; Chaleur massique; Heat capacity; Alcohol; Propyle`ne glycol; Concentration; Frigoporteur diphasique; Tempe´rature; Two-phase secondary refrigerant; Coulis de glace; Proprie´te´ thermique; Aqueous solution; Potassium; Ice slurry; Alcool; Water; Refrigeration installation; Phase diagram; Enthalpy; Ice; Modeling; Freezing; Specific heat; Additive; Propene; Thermophysical properties
• ISSN: 0140-7007; 1879-2081; 1879-2081
• DOI: 10.1016/j.ijrefrig.2004.07.013

For ice slurry calculations and modeling, it is important that they are performed with accurate thermophysical property values of the aqueous solution and of ice. For ice slurry applications there is a need for accurate freezing point data and for more basic thermophysical property data at low concentrations. The article covers some phenomena in connection with freezing of aqueous solutions. Charts with ice concentration curves as a function of temperature and additive concentration are given for a number of aqueous solutions. A main purpose of using ice slurry is to benefit from the latent heat or enthalpy difference at melting. The article shows how an enthalpy-phase diagram can be constructed, gives charts with enthalpy values and charts giving apparent specific heat as a function of temperature and concentration for aqueous solution of propylene glycol, ethyl alcohol and potassium formate. These charts for ethyl alcohol–water are in good agreement with works earlier reported on.