Archives of Current Research International

Water’s high specific and latent heat make it an effective coolant, though its high freezing point limits use in subzero applications. To solve this problem and change the properties of water; different antifreeze chemicals are added and their cooling performance was evaluated through experiments. The cooling characteristics of PG and NaCl aqueous ternary solution at different concentrations were analyzed. The result indicates that as salt concentration rose from 0 to 5% NaCl, the freezing point reduced to 2.5 ± 0.5°C. Addition of different solutes in RO water act as a nucleating agents and initiate the early freezing process resulting in lower degree of subcooling of solutions as compared to pure solvent. The lowest degree of subcooling (0.1°C) was observed in a solution containing 6% PG and 1% NaCl multi component blend (MCB). The results showed that salt reduced the degree of subcooling, while propylene glycol lowered ice adhesion and prevented ice crystal agglomeration. The results give critical understanding for developing effective coolants in industrial refrigeration, food preservation, and thermal energy storage systems.