Calorific value is the most important property of fuel. The heat emitted by the total combustion of the unit mass or volume of fuel is called the weight calorific value or the volumetric calorific value. Unit weight fuel (temperature 25 ℃) and air (temperature 25 ℃) The combustion product cools down and the final temperature is returned to the 25℃ (at atmospheric pressure) The heat released by the combustion (when the vapor condenses into water in the combustion product) is called the high calorific value. In the heat value of the deduction due to the condensation of water vapor is called low calorific value. In low calorific values, the combustion product is assumed to be gaseous.Liquid Cationic Dyes
Flash point or flash point refers to the temperature at which the mixture of vapor and air of the oil occurs briefly (not more than 5 seconds) in the vicinity of the flame. From the physical and chemical nature of the flame, it is a very small explosion of combustible gas and air mixtures. Like all mixed gas explosions, flash fire can only be produced in a certain mixture, when the combustible gas is too much or too little, and the explosion cannot occur. Therefore, it is related to the evaporation of flammable liquids and the lowest concentrations in air mixtures.Liquid Cationic Dyes
At room temperature, the vapor of most liquid fuels is not able to flash with oxygen in the air. In order to determine the flash point of the oil, it is necessary to heat the oil and test the flash point at a certain time during the heating process. The measurement is carried out under strict conditions. It is closely related to every detail of the instruments and methods used. So the flash point is also a conditional constant. The lower the flash point, the greater the risk of fire.
Combustible materials, such as fuel vapor, are mixed with air and can only be burned within a certain concentration range. This concentration (too dilute or too thick) will not burn. In this concentration range, once the flame is triggered, it can be extended from the point of ignition, as long as the concentration is appropriate, can be spread indefinitely. Usually defined as a burn limit (also known as oil enrichment, oil limit). To be exact, these two limits should be called nonflammable boundaries rather than flammable boundaries. It must not be flammable because it is over these two boundaries, but it is not necessarily flammable within this range. The lean burn limit is associated with the flash point. The nonflammable boundary of kerosene fuel is approximately 0.035 and 0.28 of oil and gas ratio (mass) at ambient temperature.Liquid Cationic Dye