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Hydro Resource Evaluation Tool
economic assessment
Annual Revenue Estimation
The methodology rests on two concepts – a Net Present Value (NPV) concept and an Internal Rate of Return (IRR) concept. To estimate an annual revenue, you need to calculate an annual amount of energy P generated in expressed kWh. This value depends on the hydraulic head and flow, as well as the annual flow variation and the overall efficiency of the plant.
How to estimate head and flow is described in the ‘River Flow Availability’ section.
The rated power P (kW) that can be generated is estimated using the following formula (see ......):
P (kW) = 0.8 x 9.81 x h (m) x F (m3/sec),
where P (kW) - rated power in kW, 0.8 - overall efficiency, 9.81 - specific weight of water in kN/m3, h (m) - head in m, F (m3/sec) - flow rate in m3/sec.
At the first level of interrogation, when you can use mean values for head and flow, the annual revenue can be calculated as shown below:
Revenue an = P (kWh) x C kWh (£/kWh) x 0.4 = 0.4 x P (kW) x 8760 x C kWh (£/h),
where it has been assumed that the plant works at the installed capacity level for about 40% of the year and C kWh is a price of electricity per kWh . The market price of electricity per kWh has been considered. Our approach is flexible and it allows the users to use any value of price per kWh.
To find out how much revenue per annum you will be producing, please use the table below and submit the required information:
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Please make sure that you are using the right units.
