![]() ![]() The lower the temperature, the thicker and more viscous the solution will become, meaning it will be harder to pump and handle and may require larger pumps. Since water is seen as the “golden standard” in thermal conductivity, higher concentrations of ethylene glycol in a water solution will cause heat to pass through it slower, therefore, the lower the amount of ethylene glycol in the mixture, the more efficient it is at conducting heat.Īn ethylene glycol/water mixture will be slightly viscous, though viscosity will vary depending on temperature and volume. Thermal conductivity is the rate at which heat passes through a material i.e., ethylene glycol & water mixture. The amount of heat required is expressed as BTU’s the chart below shows the Specific Heat values of an ethylene glycol/water mixture expressed as BTU’s per pound per degree Fahrenheit (Btu/lb oF). Specific Heat, or Specific Heat Capacity (c p), is the amount of heat required to raise the temperature of one pound of water by one degree Fahrenheit. Refer to the product data sheet of our heat transfer fluid products for a specified range for a particular product at 20☌. The Specific Gravity of a solution is the ratio of its density compared to the density of water. Reserve Alkalinity specifications for our GlycoChill+ products may be found on the product data sheet. A 30 – 40% solution may have an RA in the 4.5 – 6.0 ml range, while an 80% solution may have an RA in the 15 – 20 ml range. Over time, as the useful lifespan of the product is used up, and the product becomes ‘spent’, the Reserve Alkalinity is diminished. Generally, the more Ethylene Glycol in a solution, the higher the Reserve Alkalinity is. The values indicate the amount of alkaline components present in the product, or how resistant a fluid is to becoming acidic. ![]() Reserve Alkalinity (RA) is measured in millilitres (ml). View the product data sheet for the specified range for a particular product. The typical pH values of our GlycoChill+ ‘E’ Series Heat Transfer Fluids vary between 9.25 – 10.75, meaning that the solution is basic in nature. For more information on pH, see What is pH? Acids & Bases Explained. PH is the measure of how acid or alkaline (basic) a substance is. As a mixture gets close to the freezing point, slush may begin to form and the mixture should not be used. įreeze points and boiling points may be found on the freeze point charts for our GlycoChill+ ‘E’ Series product line: Freeze Point Chart – GlycoChill+ Ethylene Glycol Heat Transfer Fluid. This is displayed in kilograms per cubic meter (kg/m 3). The density (ρ) values of an ethylene glycol/water mixture are shown in the table below. Ethylene is a marine pollutant and has a high toxicity if ingested otherwise, it outperforms its cousin, propylene glycol, on viscosity, specific heat, freeze point & thermal conductivity. This is the reason that the burst point is always lower than the freeze point in a glycol/water solution. An Ethylene Glycol / Water mixture will never separate, unless it is freezing, at which point ice crystals will form into a “slushy-like” solution before freezing solid which is known as burst point. A slight, sweet odor may be present.Įthylene Glycol is completely miscible in water at all concentrations. However, if the mixture is a heat transfer fluid dyed to industry standards, such as GlycoChill+ ‘E’ Series, it will be pink. Here are the chemical and physical properties of Ethylene Glycol/water mixtures.Įthylene Glycol and water are both naturally clear and liquid in appearance. Mixtures of Ethylene Glycol and water are commonly used as an antifreeze or heat transfer fluid, such as in our GlycoChill+ E-series Heat Transfer Fluids. Heat Transfer Fluids Concentration CalculatorsĮthylene Glycol / Water Mixture Properties Ethylene Glycol / Water Mixture Properties. ![]()
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