A thermodynamic parameter to choose secondary coolant fluid

The heat exchange coefficient of ice slurry is higher than that of the mono-phase fluid. Conversely the ice crystals presence increases pressure losses that are growing with the ice concentration. We defined two parameters considering entropy variation that provide the possibility to compare the ice slurries to the mono-phase solutions. The first is the ratio between S and the heat exchanged. The second is the ratio between S and the maximum entropy variation when the exchanged heat in the heat exchanger is transferred at the constant inlet temperature of the two streams. Those two parameters show the ice slurry is better than the liquid solution.