Some Fuel Specifications
In addition to the calorific value (calorific value), there’s more some fuel specifications primarily fuel oil (BBM) which is often needed in practice. These specifications include:
1. Viscosity
Kinematic viscosity of fuel (liquid) fuel viscosity and describe it relates to prisoners who experienced when flowing through a pipe or a small hole. For example, fuel usage marine fuel oil (MFO) require heating to reduce viscosity prior kinematiknya before it can be used as fuel for diesel engines that do not clog the atomizer diesel engine in question.
BBM is the dynamic viscosity kinematic viscosity times the density of the fuel. Kinematic viscosity is measured in stokes (St), while the dynamic viscosity is measured in Poise (P). Often used centistokes (cSt) = 1072 Stokes.
2. Pour Point
Pour point oil (liquid) is the lowest temperature at which the oil is still pourable. This is necessary in cold climates due to the need to pour fuel or lubricant where the units are in degrees (0C) or Celsius, degrees (0F) Fahrenheit.
3. Flash Point
Flash point is the lowest temperature of the oil must be heated in order to produce enough steam to mix with the air and can be lit (flamable) when a small fire skipped numbers. Its units are degrees (0C) or Celsius, degrees (0F) Fahrenheit.
4. Point Fuel
Burning point is the lowest temperature at which sufficient oxygen conditions, spontaneous combustion occurs. burning point unit is degrees (0C) 0 Celsius or degrees (F) Fahrenheit. The point of both fuel oil and oil need to be considered in relation to the temperature, the storage room. If the room temperature reaches the point of storage grilled, then the stored oil will turn on its own and cause a fire.
Fires that occurred in the electrical center, among others, caused by lubricating oil or fuel leaking or overflowing from the tank, then the asbestos insulation pads exhaust pipes of diesel or steam power plant where the temperature reaches a point of petroleum oil that is about it so that the illuminated itself and cause a fire in the electrical center.
Coal burning point higher than the phytic fuel burn. Therefore, the start power generation is done by using the fuel for the combustion chamber temperature is still low.
5. Focal Point
Fire point is the lowest temperature at which the oil must be heated to generate enough vapor to mix with the air and can burn for at least 5 seconds.
Unit hotspots are degrees (0C) or Celsius, degrees (0F) Fahrenheit. This temperature also need to be considered as well as the burning point, although oil ignition occurs is not yet stable, at least 5 seconds, but it is already dangerous.
6. Figures Octane
Octane number is a number that describes the number as a percentage (%) volume of isooctane in a mixture consisting of isooctane and n-heptane that does not cause outbreaks (knock) on fuel oil were tested in a compression chamber cylinder combustion engine.
Unit octane number is a percent (%). Octane number = 70 means that the fuel has an octane number of 70% of this volume is the volume of isooctane and 30% n-heptane is. Some fuel octane number is:
95-98 Super Premium Gasoline 80-85 99-100
The higher the octane number, the higher the compression ratio cylinder combustion engine that can be used. From a review of thermodynamics, the higher the compression ratio used, the efficiency of the motor fuel obtained.
In the gasoline motor, ignition of fuel in the cylinder fog made using electric arc from the spark plug so that it can use fuel with a high octane number will not be lit before stepping electric arc from the spark plug. On the diesel motor fuel is expected that the switch itself (without the electric arc from the spark plug) when it reaches the end of the compression stroke. Therefore, it can be used fuel is cheaper than gasoline motor fuel.
