Optimization of Anhydrous Coolant’s Base Fluid and the Evaluation of Low Temperature Performance

Abstract

The low-temperature viscosity of anhydrous coolant is reduced by adding ethylene glycol to the propylene glycol base fluid, and the evaluation method of low-temperature fluidity is also studied. The experimental results show that the low-temperature fluidity of anhydrous coolant can be greatly improved by the participating of ethylene glycol. Freezing point method is usually used for measuring the low temperature performance of coolant, but for “long icing process” anhydrous coolant, beginning-crystal point shows more practical reference value. Therefore, freezing point, beginning-crystal point and low-temperature fluidity should be considered at the same time when evaluation the low temperature performance of anhydrous coolant.

The effect of different coolants on emissions and fuel consumption of a diesel engine

“…Also, a cleaner, environmentally friendly, non-toxic and easily degradable anhydrous propylene glycol coolant is also attracting the interest of researchers, due to its higher boiling point and a lower freezing point, which effectively prevents the coolant from boiling and freezing [21,22]. Chen et al [23] systematically conducted experiments on the physical and chemical properties of anhydrous propylene glycol or ethylene glycol-based coolants, and ultimately proposed a method using propylene glycol as a base liquid with added ethylene glycol to improve the low temperature flow performance of the anhydrous coolant. Gao et al [24] performed numerical simulation analysis on diesel engine cooling water jackets using three anhydrous coolants at different temperatures.…”