In: Economics
A city government feels that energy production capacity must be expanded to meet anticipated demands for energy. Three alternatives sources are being considered.
a. A nuclear facility with an investment of $250 million, operating costs of $3 million per year and life of 20 years.
b. A coal plant with an investment of $200 million, operating costs of 10 million per year and a life of 20 years.
c. A natural gas plant with a cost of $100 million, operating costs of $18 million per year and a life of 20 years. Use the ROR method to select the best alternative. The cost of capital (MARR) for the city is 9%.
by using rate of returns
i need solution thanks
MARR = 9%
We need to calculate incremental IRR. In order to calculate incremental IRR, first, we arrange the options in the increasing value of their initial cost
We need to find incremental cash flow between lowest and second lowest option first, then use the formula of IRR in excel on the incremental cash flow, if incremental IRR is greater than MARR then select the second lowest option if it is less than the MARR then select the lowest option.
Keep repeating the above until the last option is evaluated
Power Plant | Incremental IRR Analysis | ||||
Year | GAS (G) | COAL (C) | NUCLEAR (N) | C-G | N-G |
0 | -100000000 | -200000000 | -250000000 | -100000000 | -150000000 |
1 | -18000000 | -10000000 | -3000000 | 8000000 | 15000000 |
2 | -18000000 | -10000000 | -3000000 | 8000000 | 15000000 |
3 | -18000000 | -10000000 | -3000000 | 8000000 | 15000000 |
4 | -18000000 | -10000000 | -3000000 | 8000000 | 15000000 |
5 | -18000000 | -10000000 | -3000000 | 8000000 | 15000000 |
6 | -18000000 | -10000000 | -3000000 | 8000000 | 15000000 |
7 | -18000000 | -10000000 | -3000000 | 8000000 | 15000000 |
8 | -18000000 | -10000000 | -3000000 | 8000000 | 15000000 |
9 | -18000000 | -10000000 | -3000000 | 8000000 | 15000000 |
10 | -18000000 | -10000000 | -3000000 | 8000000 | 15000000 |
11 | -18000000 | -10000000 | -3000000 | 8000000 | 15000000 |
12 | -18000000 | -10000000 | -3000000 | 8000000 | 15000000 |
13 | -18000000 | -10000000 | -3000000 | 8000000 | 15000000 |
14 | -18000000 | -10000000 | -3000000 | 8000000 | 15000000 |
15 | -18000000 | -10000000 | -3000000 | 8000000 | 15000000 |
16 | -18000000 | -10000000 | -3000000 | 8000000 | 15000000 |
17 | -18000000 | -10000000 | -3000000 | 8000000 | 15000000 |
18 | -18000000 | -10000000 | -3000000 | 8000000 | 15000000 |
19 | -18000000 | -10000000 | -3000000 | 8000000 | 15000000 |
20 | -18000000 | -10000000 | -3000000 | 8000000 | 15000000 |
Incremental IRR | 4.96% | 7.75% |
We compare first Gas and Coal, since Gas has the lowest cost, and the second lowest option is Coal, incremental IRR is less than MARR so we select Gas, and reject Coal
Now we find incremental cash flow between Nuclear & Gas, we find incremental IRR<MARR, so we select Gas again and reject Nuclear option
Gas power plant should be selected as per the incremental analysis