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Power Workings

The document compares the costs of generating power from gas, naphtha, and coal-based power plants. It provides details on capital costs, operating costs, fuel costs, heat rates, and total costs of generation for each type of plant. The total cost of generation is lowest for gas-based plants, followed by coal then naphtha-based plants. It also calculates the affordable gas price based on making gas plant costs competitive with coal plant costs.

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101 views4 pages

Power Workings

The document compares the costs of generating power from gas, naphtha, and coal-based power plants. It provides details on capital costs, operating costs, fuel costs, heat rates, and total costs of generation for each type of plant. The total cost of generation is lowest for gas-based plants, followed by coal then naphtha-based plants. It also calculates the affordable gas price based on making gas plant costs competitive with coal plant costs.

Uploaded by

UJJWAL
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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Download as XLS, PDF, TXT or read online on Scribd
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Gas based power plant

Equity 30% 18%


Debt 70% 8.98%
Capital Cost including IDC Rs. crore/ MW 4.60 WACC 11.69%
Plant Load Factor 75% 1 1.00
Fixed Operating Cost Rs./ Kwh 0.11 2 0.90
Auxiliary Consumption 3% 3 0.80
Station Heat Rate Kcal/ Kwh 1,900 4 0.72
Annuitisation Factor at Cost of Capital 11.69% 7.74 5 0.64
Price of Fuel used 6 0.58
Gas Price US$/ MMBTU 13.06 7 0.52
Exchange Rate USD/ Rs. 54.60 8 0.46
Calorific Value Kcal / SCM 8,500 9 0.41
Gas Price Rs./ Kcal 0.0028 10 0.37
Cost of Generation 11 0.33
Capital Cost Rs./ Kwh 1.03 12 0.30
Fixed Operating Cost Rs./ Kwh 0.15 13 0.27
Cost of Fuel Rs./ Kwh 4.16 14 0.24
Less : CDM Credit Rs./ Kwh (0.33) 15 0.21
Total Cost of Generation Rs./ Kwh 5.01 7.74
Naphtha Based Power Plant
Equity 30% 18%
Debt 70% 8.98%
Capital Cost including IDC Rs. Crore/ MW 4.80 WACC 11.69%
Plant Load Factor 90.0% 1 1.00
Fixed Operating Cost Rs./ Kwh 0.31 2 0.90
Auxiliary Consumption 3% 3 0.80
Station Heat Rate Kcal/ Kwh 2000 4 0.72
Annuitisation Factor at Cost of Capital @ 11.69% 8.51 5 0.64
Price of Fuel used 6 0.58

Naptha Price Rs./ Kg 35.00 7 0.52


Calorific Value Kcal / Kg 11180 8 0.46
Naphtha used Rs./ Kcal 0.0031 9 0.41
Cost of Generation 10 0.37
Capital Cost Rs./ Kwh 0.74 11 0.33
Fixed Operating Cost Rs./ Kwh 0.36 12 0.30
Cost of Fuel Rs./ Kwh 5.81 13 0.27
CDM Cost Rs./ Kwh 0.20 14 0.24
Total Cost of Generation through Naptha 7.10 15 0.21
Less : Fixed Cost of Gas CCGT Rs./ Kwh 1.18 16 0.19
Affordable Variable cost of gas based power Rs./ Kwh 5.92 17 0.17
Delivered cost of gas Rs./ MMBTU 785.03 18 0.15
Affordable cost of gas US$ / MMBTU 14.38 19 0.14
Less : Sales Tax @12% US$ / MMBTU 1.50 20 0.12
Less : Transportation US$ / MMBTU 0.35 8.51
Gas Purchase Price US$ / MMBTU 12.52
Coal Based Power Plant
Equity 30%
Debt 70%
Capital Cost including IDC Rs. crore/ MW 5.50 WACC 11.69%
Plant Load Factor 85.0% 1 1.00
Fixed Operating Cost Rs./ Kwh 0.3388235 2 0.90
Auxiliary Consumption 9.50% 3 0.80
Station Heat Rate Kcal/Kwh 2,350 4 0.72
Annuitisation Factor at Cost of Capital @ 11.69% 8.51 5 0.64
6 0.58
Price of Fuel used 7 0.52
Coal Price Rs./ Kg 0.60 8 0.46
Calorific Value Kcal / Kg 3500 9 0.41
Coal Price Rs./ Kcal 0.0002 10 0.37
11 0.33
Cost of Generation 12 0.30
Capital Cost Rs./ Kwh 0.96 13 0.27
Fixed Operating Cost Rs./ Kwh 0.44 14 0.24
Cost of Fuel Rs./ Kwh 0.38 15 0.21
CDM Cost Rs./ Kwh 0.33 16 0.19
Total Cost of Generation through Coal 2.11 17 0.17
Less : Fixed Cost of Gas CCGT Rs./ Kwh 1.18 18 0.15
Affordable Variable cost of gas based power Rs./ Kwh 0.92 19 0.14
Delivered cost of gas Rs./ MMBTU 122.66 20 0.12
Affordable cost of gas US$/ MMBTU 2.67 8.51
Less : Sales Tax @12% US$/ MMBTU 0.25
Less : Transportation US$/ MMBTU 0.35
Gas Purchase Price US$/ MMBTU 2.07

0.5 kg / kwh
0.0005 Tons / kwh
660 Rs. per Ton
0.33 Rs. per Kwh

1.56 Kwh / kg coal


0.8333333333 kg CO2 per Kwh
using coal
18%
8.98%

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