The following table gives capital costs and variable costs
for a coal plant, a natural gas combined‐cycle plant, and a natural‐gas‐fired
gas turbine:
|
|
COAL
|
CC
|
GT
|
|
Capital Cost ($/kW)
|
$ 1,500.00
|
$ 1,000.00
|
$ 500.00
|
|
Variable Cost (c/kWh)
|
2.50
|
4.00
|
8.00
|
The utility uses a fixed charge rate of 0.10/yr for
capital costs. Its load duration curve is shown as follows:
a.
Draw the screening curves for each type of
power plant.
b.
Suggest a least‐cost combination of power
plants for this utility.
c.
Estimate the capacity factor for each type of
power plant.
d.
How much electricity would each type of power
plant generate each year?
e.
What annual revenue would the utility need to
receive from each type of power plant?
f.
What would be the cost of electricity from
each type of power plant?
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