engleski

Investigation of Thermal Properties of Freezed Tap, Demineralized and Sea Water

This paper reports an experimental investigation focused on the thermal conductivity of ice made of tap, demineralized and sea water. Presented data could assist in a better understanding of the thermal properties of ice and processes within the ice. While thermal constants, in particular, thermal conductivity, of liquid water have been well established, measurements on thermal conductivity of ice are few in literature and have inconsistent values. Thermal conductivity was measured in a range from -14 °C to -34 °C using the Transient Plane Source (TPS) method. Frozen blocks of the different kinds of water were placed in an expanded polystyrene box in the freezer where the measurements took place. The thermal conductivity of the ice made of tap water was observed to vary from 2.073 Wm-1K-1 at -14 °C to 2.219 Wm-1K-1 at -33 °C. The values obtained for the ice made of demineralized water differ by less than 1%. The thermal conductivity of the sea ice has shown to be more temperature-dependent with the values ranging from 1.717 Wm-1K-1 at -14 °C to 2.066 Wm-1K-1 at -34 °C. A noticeable rise in the thermal conductivity of the sea ice was observed in the temperature range of -20 °C to ‑26 °C. A possible reason could be increased precipitation of salt in that temperature range.

thermal conductivity, ice, water, Transient Plane Source

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