What is GCV of coal?
The gradation of non-coking coal is based on Gross Calorific Value (GCV), the gradation of coking coal is based on ash content and for semi coking /weakly coking coal it is based on ash plus moisture content, as in vogue as per notification.
How is coal GCV calculated?
GCV = 76.56 – 1.3(VM + ash) + 0.0073(VM + ash)2 In the above equation, VM and ash were in weigh percentage on dry basis and GCV was determined in mJ/kg also in dry basis.
How do I find my GCV value?
Calculation of GCV of fuel:-
- C+ O2 —- CO2 + 8137.5Kcal/kg of carbon.
- H2 +.5O2—-H20 + 28905 Kcal/Kg of hydrogen.
- S +O2—SO2+ 2181 Kcal/kg of Sulphur.
What is the best grade of coal?
Anthracite
Anthracite: The highest rank of coal. It is a hard, brittle, and black lustrous coal, often referred to as hard coal, containing a high percentage of fixed carbon and a low percentage of volatile matter. Bituminous: Bituminous coal is a middle rank coal between subbituminous and anthracite.
How is GCV measured?
The “Effluent Treatment” laboratory is equipped with a calorimeter, which is used to determine gross calorific value (GCV). The hydrogen content of the fuel is then measured in order to calculate net calorific value (NCV).
How do you calculate GCV and NCV of coal?
Whether to lower calorific value can be found simply by subtracting latent heat of steam or both the latent heat and sensible heat in cooling from 100°C from the gcv. However, in literature, the ncv of the fuel is obtained by subtracting from the hcv the amount 2466 kJ/kg.
What is GAR in coal?
GAR – Gross As Received. Thermal coal is quoted on a GAR basis, except for Europe/ARA, Richards Bay 6,000 kcal/kg, and Japan and Korea West CIF, which are quoted on a NAR (Net As Received) basis.
Which coal has highest calorific value?
Anthracite (“coal-like”) is a hard, very low content of volatile compact variety of coal that has a high luster. It has the highest carbon content (between 92.1% and 98%), the fewest impurities, and the highest calorific content of all types of coal, which also includes bituminous coal and lignite.
What is TM in coal?
Proximate analysis of coal samples (TM: total moisture; AC: ash content; VM: volatile matter; TS: total sulphur; FCC: fixed carbon contents).
For what GCV is used?
Boiler is an important practical application in heat transfer devices. Its function is to transfer the heat produced by the combustion of fuel to water, and ultimately to generate steam.