Apart from the initial investment, there are annual cash inflows and outflows associated with the project throughout its life span.
The Net Present Value (NPV) is the net value of all benefits (cash inflows) and costs (cash outflows) of the project, discounted back to the beginning of the investment. The benefits will essentially include the income from sale of electricity generated.
Benefit Cost Ratio (BCR) is the ratio of the accumulated present value of all the benefits to the accumulated present value of all costs, including the initial investment.
Payback Period (PBP) is the year in which the net present value of all costs equals with the net present value of all benefits. Hence PBP indicates the minimum perios over which the investment for the project is recovered.
Internal Rate of Return (IRR) is the maximum rate of interest (in real terms) that the investment can earn. In physical sense, it is the interest rate upto which we can afford to arrange the capital for the project.

Input:
	Turbine Rated Power, PR
	Capacity Factor, CF
	Capital Investment
	Electricity Sold Rate
	Annual Operation and maintainance cost
	Discount Rate, i
	Life Period, n
Output:
	Net present value of the project, NPV
	Benefit cost ratio, BCR
	Payback period of the investment, n

Turbine Rated Power, PR		kW
Capacity Factor, CF		Tk/kWh
Capital Investment		Tk
Electricity Sold Rate		Tk/kWh
Annual Operation and maintainance cost		% Turbine Cost
Discount Rate, i		(%)
Life Period, n		year(s)

Net present value of the project is, NPV = $ 2365311 TK

Benefit cost ratio, BCR = 1.84

Payback period of the investment is, n = 8.5 year(s)