Below this temperature the flow resistance due to increasing viscosity (and possibly long hoses with quick connectors) is too high for proper cooling performance. ![]() Such liquids can be used for flow temperatures down to -25☌, depending on the application the thermostat is used for. Mixtures with lower antifreeze content have also lower viscosity, which leads to less flow resistance and less load of the thermostat's pump. Other mixtures are 30:70 or 20:80 of antifreeze : water (% by volume). Dynamic viscosity - of ethylene glycol based water solutions at various temperatures are indicated below below freezing point above boiling point Note The dynamic viscosity of an ethylene glycol based water solution is increased compared with the dynamic viscosity of clean water. Measurements were planned on a logarithmic. Ethylene Glycol Technical Data: Product Description Monoethylene Glycol MEG Property Molecular Weight Boiling Point 760 mm Hg, Vapor Pressure 20C(68F)mmHg Density, (g/cc) 20C (68F) Density, (g/cc) 60C(140F) 1. Most antifreezes contain corrosion inhibitors and other additives, like foam depressants.īesides its use in radiator systems, automotive antifreeze mixed with water is also a heat transfer liquid for cooling thermostats or circulators used in labs.Ĭommon mixtures are 50:50 or 40:60 of antifreeze : water. Dynamic viscosity curves were determined in rota- tional measurement at a constant temperature of 20C. A further task is to lubricate the cooling system, such as the water pump. transport properties including thermal conductivity, viscosity, density and specific. ![]() Automotive antifreeze keeps the cooling water from freezing in winter and from boiling in summer. base fluids (ethylene glycol and distilled water). The main ingredient in most coolants is ethylene glycol or propylene glycol. Cinematic viscosity X10-6 m 2 /s Monoethylenglycol C2H4(OH)2. ![]() Automotive antifreeze, also called coolant, is the liquid which is used in the radiator and cooling system of an internal combustion engine for vehicles. Table 8-3-1 - Properties of mixture Water/Glycol. Ethylene glycol (IUPAC name: ethane-1,2-diol) is an organic compound (a vicinal diol) with the formula (CH 2OH) 2.
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