A THERMODYNAMIC PARAMETER TO CHOOSE SECONDARY COOLANT FLUID

摘要

The heat exchange coefficient of ice slurry is higher than that of the mono-phase fluid. Conversely, the presence of ice crystals increases pressure losses; and these losses grow with the concentration of ice. We defined two parameters relating entropy variations and heat transfer to compare the ice slurries to the mono-phase solutions. The first is the ratio between AS and the heat exchanged. The second is the ratio between AS 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 that ice slurry is better than the liquid solution.