What is calorific value of fuel class 8?
What is calorific value of fuel class 8?
The amount of heat energy produced on complete combustion of 1 kg of a fuel is called its calorific value. The calorific value of a fuel is expressed in a unit called kilojoule per kg (kJ/kg).
What do you understand by the calorific value of a fuel which fuel has the highest calorific value?
Calorific value is nothing but the energy contained in a fuel or food, determined by measuring the heat produced by the complete combustion of a specified quantity of it. This is now usually expressed in joules per kilogram. Hence, hydrogen has the highest calorific value.
What do you understand by calorific value and efficiency of a fuel?
Fuel efficiency is measured as the amount of heat that 1 kg of fuel (any fuel) produces on combustion. This is known as the calorific value of the fuel. The unit of measurement of fuel efficiency is kilojoules per kg, i.e. kJ/kg.
What is calorific value of fuel class 10?
The calorific value of fuel – It is the amount of energy released or produced when 1 kilogram of fuel burns in the presence of oxygen and the products of combustion are cooled to STP. The unit of measurement of the calorific value is the same as the energy. SI unit of calorific value is kJ/kg.
What is called good fuel?
(1) It should have a high calorific value: An ideal fuel (or good fuel) is that which gives us more heat per unit mass. (2) It should burn without giving out any smoke or harmful gases: An ideal fuel (or good fuel) is that which does not pollute air on burning by giving out smoke or poisonous gases.
How is the calorific value of a fuel determined?
The calorific value or fuel value of a fuel is the amount of heat energy given out when one gram of the fuel is completely burnt in excess of oxygen. The unit for fuel value is kJ g-1. Fuel value is also known as heat value. A fuel with a high fuel value releases a lot of heat per gram when it burns.
What is the meaning of the word calorific?
calorific value. noun. the quantity of heat produced by the complete combustion of a given mass of a fuel, usually expressed in joules per kilogram.
What is the difference between calorific value and specific heat?
Calorific value is amount of heat released upon combustion of unit mass of fuel where as specific heat is the amount of heat required to raise the temperature difference of 1℃ for a particular substance.
Which is the correct unit of calorific value?
The unit of calorific value is KJ/kg (kilojoule per kilogram). The efficiency of fuel of food is dependent on the calorific value; higher the value, higher the efficiency, and similarly lower the calorific value, lower is the efficiency.
What is the heating value of fuel?
The heat value of a fuel is the amount of heat released during its combustion. Also referred to as energy or calorific value, heat value is a measure of a fuel’s energy density, and is expressed in energy (joules) per specified amount ( e.g. kilograms).
What is the lower heating value of natural gas?
Lower heating values neglect the energy in the water vapor formed by the combustion of hydrogen in the fuel. This water vapor typically represents about 10% of the energy content. Therefore the lower heating values for natural gas are typically 900 – 950 Btu per cubic foot.
What is the heating value of coal?
The energy density of coal, that is its heating value, is roughly 24 megajoules per kilogram (approximately 6.7 kilowatt-hours per kg).
What is the heating value of propane?
A typical heating value for commercial- grade propane and HD-5 propane is 90,500 British thermal units per gallon (Btu/gal), after vaporization; for commercial-grade butane, the value is 97,400 Btu/gal.
