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Winter diesel fuel (also known as winter diesel, alpine diesel, or winterised diesel) refers to diesel fuel enhanced to prevent it from gelling in cold weather conditions. In general it is achieved by treatment with additives that change the low temperature characteristics of the fuel.
Cold filter plugging point (CFPP) is the lowest temperature, expressed in degrees Celsius (°C), at which a given volume of diesel type of fuel still passes through a standardized filtration device in a specified time when cooled under certain conditions. This test gives an estimate for the lowest temperature that a fuel will give trouble free ...
When the temperature is below 0 °C, the dew point is called the frost point, as water vapour undergoes gas-solid phase transition called deposition, solidification, or freezing. In the petroleum industry, cloud point refers to the temperature below which paraffin wax in diesel or biowax in biodiesels forms a cloudy appearance.
However, without stirring the paraffin waxes may still remain in crystal form so the fuel may have to be warmed further to its remix temperature to completely re-dissolve the waxes. Anti-gel additives are sometimes added to petroleum products where cold temperature may affect their use. The additives act to reduce the formation of wax crystals ...
The cetane number is a key property of diesel fuel, as it measures its aptitude to self-ignite in the combustion chamber. [8] The auto ignition temperature of diesel fuel is around 220 °C (428 °F) at atmospheric pressure. Cetane improver additives are used to decrease this temperature and lead to quicker combustion, by increasing the cetane ...
Ferucci said he saw the temperature was minus 20 Fahrenheit (minus 28.9 Celsius) in one part of Anchorage on Thursday and couldn't remember the last time it went that low. “It’s been cold, and ...
In Chicago, there have been four instances when the mercury failed to reach 10 degrees Fahrenheit on Christmas Day, with the coldest reading coming in 1983 when it was below zero all day.Currently ...
A disadvantage of diesel fuel in cold climates is that its viscosity increases as the temperature decreases, changing it into a gel (see Compression Ignition – Gelling) that cannot flow in fuel systems. Special low-temperature diesel contains additives to keep it liquid at lower temperatures.