Wind pre-feasibility

A transparent early-stage wind screen

The wind workflow uses a location lookup to estimate a capacity factor, then applies that value to annual operating cash flows. The returned resource state, turbine approximation and manual override should be reviewed before a result is used in development or financing decisions.

What you can screen

Technology

Onshore wind only

Capacity ?capacity

MW in the current calculator; confirm the project’s AC basis.

Resource input

Capacity factor, with mean wind speed and hub-height details shown after retrieval.

Commercial inputs ?tariff

Tariff, PPA term, CAPEX, development and grid costs, OPEX and escalation.

Financing inputs ?debt

Gearing, tenor, interest, fees, DSRA, debt profile, tax and depreciation.

Outputs ?dscr

Project IRR, post-tax project IRR, equity IRR, DSCR minimum and average, plus annual cash flow.

How the current resource approximation works

A location lookup calls NASA POWER climatology for annual mean wind speed at 50 m. The app applies a 0.2 power-law shear exponent to estimate speed at a 120 m hub height, then linearly interpolates a fixed capacity-factor table from 3 to 14 m/s. Values are rounded before being returned to the calculator.

The table represents a generic modern onshore turbine approximation and is not a turbine-specific power curve or a measured site assessment. The implementation identifies the reference as a generic approximately 5 MW, 150 m rotor and 120 m hub-height class. A retrieval failure or manual value must remain visible as such.

Terms: ?capacity and generation ?screening limitations

Three-stage workflow

1. 1

   Project and location

   Choose Onshore Wind, select a location and inspect the NASA POWER resource state and approximation details.

2. 2

   Assumptions

   Review capacity factor, capacity, CAPEX, tariff, OPEX and the collapsed financing and tax assumptions before calculating.

3. 3

   Results

   Read the indicative cash-flow outputs and warnings, then identify the resource, grid, land and commercial work still needed.

Important limitations

• The current implementation is onshore only. It does not model offshore wind, wake losses, curtailment, availability, layout, turbulence or a site-specific turbine.
• NASA POWER climatology and a generic curve are screening inputs, not a bankable wind measurement campaign or energy assessment.
• Financial outputs reflect user-supplied assumptions; zero development and grid costs are assumptions to confirm.
• IRR alone is not an investment classification. Any hurdle or covenant comparison must state its criterion and period.