Basis of Calculations
qF.O. Consumption/Hr : 100 Liters
qDaily running Hours : 24 Hrs
qTotal F.O. consumption/day : 2400 Liters(100 Liters X 24 Hr)
qRate of F. O. : Rs. 24.00 / Liter
qMax. Temperature in rotary Kiln : 750 – 900 deg C
qC.V. of Wood ( Avg ) : 3000 K.cal/kg
qRate of coal (Approx.) : Rs. 2.5/ Kg (Including Transportation)
qRate of Electricity : Rs. 5/KW
qRate of trained Operator on daily wages : Rs. 300/day
qRate of un-skilled labor on daily wages : Rs. 150/dayAnalysis of proposed project against Oil firing
1. Total F.O. consumption/day : 2,400 Lit/Day
2. Cost of FO requirement/day : Rs. 57,600/-:: 2400 Liter X Rs. 24
3. Requirement of wood to replace 1 lit FO : Max.3.5 Kg/Lit FO
4. Total wood requirement/day : 8400 Kg/Day:: 2400 Liter X 3.5 Kg
5. Cost of wood /Kg : Re.2.5/Kg
6. Total cost of Wood : Rs. 21000 /day:: 8400 Kg X Re.2.5/-
7. Gasifier operating cost/day/plant
a) Power………………… : 50 KW:: 35 KW X 24 Hr X Rs. 5 = Rs. 4,200/day b) Labor ………………… : 6/Shift, total 18::Total 18 X Rs. 150 = Rs. 2,700/day c) Operator ……………. : 1/Shift, Total 3::Total 3 X Rs. 300 = Rs. 900/day d) Maintenance There is no daily maintenance but annually we take approx. Rs. 2,00,000/annum, so Rs. 2,00,000/300 days = Rs. 666/day, or say Rs. 700/- Gasifier operating cost/day/plant= Rs. 8,500/- day (a+b+c+d)
Gasifier operating cost/day : Rs.8,500/day
8. Total replacement cost/day : Rs. 29,500/-:: 6 + 7 = 8
9. Gross benefits /day : Rs. 28,100/-:: 2 – 8
10.Gross benefits/months : Rs. 7,02,500/-:: Rs. 28,100/- x 25 days in month
11. Annually Gross Benefits : Rs. 84,30,000/- :: Rs. 7,02,500/- x 12 Months
12. Total Project cost (approx.) : Rs. 53,00,000/- :: Capital cost of Gasifier + other expenses of pipeline, burners, Civil, electrical & plumbing works, Lab, cooling tower, transportation, crane charges etc.
13. Interest @ 12% pa on total Project cost : Rs. 6,36,000/-
14. R.O.I. : 8 1/2 MONTHS