Abstract
Dynamic-type of ice-making cold thermal energy storage systems using water-silicone oil emulsion with an additive, (C_2H_5O)_3SiC_3H_6NH_2,has been proposed. Two kinds of heat exchanger were examined and the performances were compared. One type of heat exchanger was a spiral tube and it was immersed in a low temperature thermostatic bath. The other was coil-shaped double tube heat exchanger using two tubes. The emulsion was circulated to make ice continuously. These systems were operated under various cooling conditions (flow rates of the emulsion and brine temperatures). The effects of the tube materials (fluororesin and non-fluororesin) and thickness were also examined. Slurry ice can be formed continuously without adhesion of ice to the cooling wall under certain conditions. Using the fluororesin tube prevents ice from the adhesion and make it wide that the range of the cooling conditions under which slurry ice was formed continuously. Furthermore, making thickness of a tube thin and accelerating heat transfer enable to make ice continuously without lowering rate of ice formation at a higher brine temperature.
