- 1 What is fuel LHV?
- 2 How do you calculate LHV of fuel?
- 3 What is lower heating value of fuel?
- 4 What is difference between LHV and HHV of a fuel?
- 5 Should I use LHV or HHV?
- 6 Why hydrogen is not used as a fuel?
- 7 Which fuel has highest calorific?
- 8 What is net calorific value?
- 9 What is heating value of fuel?
- 10 Which fuel causes least pollution?
- 11 What does heat value indicate?
- 12 What is LHV efficiency?
- 13 How is calorific value calculated?
- 14 What is calorific value?
What is fuel LHV?
The LHV of a fuel determines the fuel flow rate required when going into the engine because the total quantity of energy input necessary for the engine to produce a specific output power is defined and fixed. Hence the gas flow rate has to be such in order to provide the required energy input.
How do you calculate LHV of fuel?
Under this formula, the relationship between the lower heating value of a fuel and the higher heating value of that fuel is: LHV = HHV – 10.55(W + 9H) Where: LHV = lower heating value of fuel in Btu/lb, HHV = higher heating value of fuel in Btu/lb, W = Weight % of moisture in fuel, and H = Weight % of hydrogen in fuel.
What is lower heating value of fuel?
The lower heating value (also known as net calorific value) of a fuel is defined as the amount of heat released by combusting a specified quantity (initially at 25°C) and returning the temperature of the combustion products to 150°C, which assumes the latent heat of vaporization of water in the reaction products is not
What is difference between LHV and HHV of a fuel?
So, in summary: 1. The numerical difference between the LHV and HHV of a fuel is roughly equivalent to the amount of latent heat of vaporization that can be practically recovered in a secondary condenser per unit of fuel burned. The numerical value of HHV is always greater than or equal to the LHV.
Should I use LHV or HHV?
For simply benchmarking part of a reaction the LHV may be appropriate, but HHV should be used for overall energy efficiency calculations if only to avoid confusion, and in any case, the value or convention should be clearly stated.
Why hydrogen is not used as a fuel?
Hydrogen has the highest calorific value so it can be considered as the best fuel but it is highly inflammable so it is diificult to store, transport and handle so it is used as a fuel only where it is absolutely necessary.
Which fuel has highest calorific?
Hence, hydrogen has the highest calorific value. Fuels with calorific values:
- Hydrogen: 150 KJ/g.
- Methane: 55 KJ/g.
- LPG: 50 KJ/g.
- Kerosene oil:48 KJ/g.
- Charcoal: 33 KJ/g.
- Wood: 17 KJ/g.
What is net calorific value?
The heat produced by combustion of unit quantity of a solid or liquid fuel when burned, at a constant pressure of 1 atm (0.1 MPa), under conditions such that all the water in the products remains in the form of vapor.
What is 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).
Which fuel causes least pollution?
Natural gas is the cleanest fuel and causes the least pollution when burnt compared to petrol, diesel and coal.
What does heat value indicate?
Heating value is the amount of heat obtained when fuel or some other substance of a specific unit quantity is combusted. The upper heating value (gross) is the heat obtained from complete combustion of a substance.
What is LHV efficiency?
This is a withdrawn hot water stream to remove dissolved solids and other impurities that would otherwise build up and damage the equipment. Thus, a good boiler efficiency would be around 100-6-1-1 = 92% (LHV).
How is calorific value calculated?
The formula is, cal. value = 343.3 x fixed carbon % + α x % volatile matter kJ/kg. Goutel formula is unreliable for fuels having high percentage in oxygen.
What is calorific value?
Calorific value is the amount of heat energy present in food or fuel and which is determined by the complete combustion of specified quantity at constant pressure and in normal conditions. It is also called calorific power. The unit of calorific value is kilojoule per kilogram i.e. KJ/Kg.