Re: Calorific Value Of Coal And Moisture
Hi Prashant,
Bit late I know, but I've only just picked up this thread and I noticed that you have not had a reply. I worked on nett c.v. calculations in the early 90's and we developed a system of determing the final calorific value of a blended coal product which was supplied to power stations. At the time there was a penalty for being outside a certain nett cv value, both high and low.We applied this system at a colliery called Cotgrave in Nottinghamshire, where the moisture content was very variable. It worked well.
The ash content and the moisture content has a linear reduction relationship with the nett cv (final cv) in percentage terms as follows:
nett cv = 100-((total ash + total h20)/100) * dry, ash free cv
The dry, ash free cv is determined by lab analysis.
Hope this helps.
Regards
Jon Scarrott
Lodestone electronics Ltd
jonlodestone@aol.com
www.lodestone-electronics.com ■
Untitled
Originally Posted by Prashant
GCV=8100-139(Ash+Moisture) ■
Formula For Cv
I think the formula indicated by Prasant is not proper, CV will depend on the inherent moisture of the coal. The emperical formula applied are not very accurate. The value determined by the formula given below incates value are within +/- 10% of CV determined by Bomb calorimeter.
GCV = 85.555 ( 100- {1.1A + M}) – 60*M ( Moisture equilibrated). This formula is applicable for coal having inherent moisture less than 5%.
Chattopadhyay ■
Calorific Value of Coal and Moisture
what is the effect of moisture in coal on its calorific value. Is there any exact relationship between moisture and Calorific value of coal (coal type Adaro/ Enviro/ subbituminous coal)? ■