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Freeze protecting of cooling systems - temperature rating vs. required amount of antifreeze.
Required amount of antifreeze to protect cooling systems at specific temperature ratings can be estimated from the charts below:
- tC = 0.56 (tF - 32) = 5/9 (tF - 32)
- 1 Gallon (U.S.) = 3.785x10-3 m3 = 3.785 dm3 (liter) = 231 in3 = 0.13368 ft3 = 4.951x10-3 yd3 = 0.8327 Imp. gal (UK) = 4 Quarts = 8 Pints
Never use more than 70% antifreeze in a cooling system.
- Air Conditioning systems - heating, cooling and dehumidification of indoor air for thermal comfort.
- Material properties of gases, fluids and solids - densities, specific heats, viscosities and more.
- Engineering related topics like Beaufort Wind Scale, CE-marking, drawing standards and more.
- Comparing ethylene glycol and propylene glycol antifreeze properties.
- Freezing point, density, specific heat and dynamic viscosity of Calcium Chloride Water coolants.
- Properties like freezing point, viscosity, specific gravity and specific heat of ethylene glycol based heat-transfer fluids, or brines.
- Comparing antifreezes used in water based heat transfer fluids or brines.
- Freezing and flash points of isopropanol (2-Propanol) based water solutions or brines.
- Some fluids and their thermal conductivities.
- Volumetric - or cubical - expansion coefficients for common liquids.
- Freezing and flash points for methanol or methyl based heat-transfer fluids or brines.
- Freezing points of propylene glycol based heat-transfer fluids suitable for the food processing industry.
- Comparing properties like specific gravity, freezing points and viscosity for secondary coolants like calcium chloride, sodium chloride, ethylene glycol and propylene glycol.
- Sizing snow melting systems - water and antifreeze.
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