3 posts
TimePosted 12/01/2009 13:31:20
asdasdfas says

### COAL CONSUMPTION

While going through case study of HEAT BALANCE of client, I got  understand that, achived thermal energy of 105kcal/kg of clinker leads to saving of 32475t coal/annum . Well the capacity of clinker production also got changed after arresting some defect and rectifying leads to 172TPH from 165TPH.

I didn’t understand how  they must had calculated the given coal consumption by saving of 105kcal/kg of clinker. However iam inclined to believe on them , but the calculation of coal which I don’t lnow pose to in middle of my answer approach.

Can anybody tell me how to calculate coal linking to heat .

REGARDS

BYRD JHONSAN

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57 posts
TimePosted 12/01/2009 15:46:24

### Re: COAL CONSUMPTION

Well, the link is the calorific value of the coal, specifically, the Lower Heat Value. It is usually in the range 5500-7500 kcal/kg of (dry) coal (depending on coal type and characteristics).

All you need to do is multiply the  105 kcal/kg clinker economy by the annual production of clinker. You get the total energy economy that you can convert to coal economy by dividing by the LHV.

I do not have the precise values corresponding to your case, but using conservative estimations, I do not obtain a coal economy of more  than 25000 tons however. So, there seem to be a problem in this estimation.

Best regards

3 posts
TimePosted 19/01/2009 05:43:27
asdasdfas says

### Re: COAL CONSUMPTION

Sir

Can you tell me what annual production you have considered. I will be greatful if you give specifcity by showing the calculation resulting to which you got the coal economy'

byrd

138 posts
TimePosted 19/01/2009 07:17:34
lalbatros says

### Re: COAL CONSUMPTION

assuming 8000 h operation per year,
172 t/h means 1 376 000 t/year

an economy of 105 kcal/kg means
105 * 1 376 000 * 1000= 144 480 000 000 kcal/year

asuming a coal of very low heat value,
5500 kcal/kg as indicated by Mr ovancantfort,
leads to a coal economy of

144 480 000 000 / 5500 = 26269090 kg coal
this is  26269 tons coal

Therefore, even assuming a very poor coal, we get a 20% lower coal economy.