Using the program
1. Home Page of the WindPower program.
2. Return on investment, payback period and cost per kilowatt-hour.
3. Wind turbine power output profile including the zero-power output period.
4. Comparison with field data for a large wind turbine - the Vestas V80 2mW and V90 3mW turbines.
5. Smaller wind turbines -the Evance R9000, Skystream, Bergey Excel and Honeywell RT6000.
6. Comparison with field data for small wind turbines -the Skystream, Fortis Montana and the Turby VAWT.
7. Estimating mean wind speed.
8. The UK Wind Speed Database program.
9. Links to manufacturers' websites.
10. Download page (see below).
11. Reference library.
PelaFlow Consulting
12. About the project and Pelaflow Consulting.
13. Contact us
Technical webpages
14. Wind turbine characteristics
15. Wind speed and power output statistics
16. Calculating the mean power
17. Maximum turbine efficiency - the Betz limit
18. Intermittency of wind power - page 1.
19. Intermittency of wind power - page 2.
10. DOWNLOAD PAGE.
(1) Free WindPower trial program
(2) Buy full WindPower program
(3) Free turbine database
(4) Buy UK Wind Speed Database program

9. THE DOWNLOAD AND PURCHASE PAGE (Scroll or click to select).

(i)                                    The WindPower program V2c
(ii)             Wind turbine power curve database (free)
(iii)        The UK Wind Speed Database V2.0i program


(i) The WindPower program V2c.
The full version of the program costs 25 - about 40 US$'s or 30 Euros.

Payment in any currency can be made by credit card or PayPal . The full program gives access to our downloadable database (see below) of over 100 hundred wind turbine power curves. A user of the program can add new power curves to the database but, in any case, the database is updated typically every month or so.

A free trial version is available with the limited features listed in the table below. The main restriction is that turbine power curve data cannot be loaded from or saved to the free database but has to be entered manually. Both programs are MS Windows only programs and will run on Windows XP, Vista, Windows 7 and the PC version of Windows 8 - but not on the tablet version (known as Windows RT). The program requires a minimim screen resolution of 1024 x 768 with normal screen font size of 96 dpi.

Full version Free version
Manual data input of power curves tick tick
Power curve data can be saved to and loaded from the database tick tick
All data can be printed to a hardcopy or pdf printer tick tick
All data can be exported to spreadsheets tick tick
Mean power and annual energy calculations tick tick
Return on investment calculations tick tick
Payback period calculations tick tick
Cost per kilowatt-hour calculations tick tick
Power output profile tick tick
Ratio of local power usage to total power output tick tick
Saveable comment box for turbine details tick tick

By clicking on the image links above, the full or trial version can be downloaded. It is recommended that the file is first saved to your computer and then run after it has been downloaded. If you click on the Buy Now link, please allow a few seconds for a connection to the PayPal server.

IMPORTANT NOTE: If you buy the full version, you will find a link or a button after payment on the final PayPal payment page like those shown below
Return to windpower@pelaflow.co.ukOR Return to Merchant
Please make sure you click on this link to be transferred to our download webpage where you can download the full program and obtain the password.
PayPal change the layout of their payment pages from time to time so please ensure that you click on a return link on their completion payment page to be redirected to our download page.

Download trial

The WindPower program is straightforward to use but the two manuals in Adobe pdf format that are part of the program's Help menu can be downloaded here to see what is involved. - Userguide for WindPower V2.01c and Wind Turbine Basic Concepts. The videos on webpage 1, webpage 2 and webpage 3 also give a guide on using the program.

If you have any problems with the download or queries about the program, please contact us through our Contact Us webpage.



If you already have the trial version installed, you can install the full version without uninstalling the trial version because the programs are installed in different default directories - C:\Program Files\WindPower for the full version and C:\Program Files\WindPowerTrial for the trial version. After the full installation, you can uninstall the trial version if you wish.

Anyone purchasing a full version of the program can download and use the database of commercial wind turbine power curves - see below. If there is a wind turbine that is not in the database and the manufacturer only supplies data in the form of a power curve graph, PelaFlow Consulting will accurately convert the graph into a power curve file for you. Simply use the form on our Contact Us webpage to send the details of the wind turbine to us preferably as a webpage link and we will convert it to a power curve file using a specialised graph-to-data conversion software program.


(iii) The wind turbine database - October 2013.

The database contains power curve files with the extension .pow that can be loaded directly into the WindPower program. At the moment, there are about a hundred horizontal axis wind turbines (HAWTs) in the database ranging from small 'domestic' turbines to the largest commercial units. A small number of vertical axis wind turbines (VAWTs) have also been added to the database. The database will be updated about every month and suggestions for additions would be welcome on our contact page.

Whilst every effort has been made to ensure that the power curve files have been accurately reproduced, there are sometimes uncertainties about the manufacturer's data particularly for the smaller wind turbines. This is discussed on the Web page 5. Generally, the power files have the letters MT or MG attached to their names. MT means the data have been obtained from a manufacturer's table whereas MG means the data have been obtained from a graph. Occasionally, files have been constructed from independent tests. In these cases, the acronym for the testing organisation is added to the file name. There are also files with the letters MOD (modified) attached to their names. These files are based on manufacturers' graphs but it was found that the power values close to the cut-in speed were so inaccurate that power coefficients (i.e. efficiencies) of over 50% were obtained. In these case, the power values at the lower speeds were modified to have an efficiency similar to the efficiencies obtained at somewhat higher speeds where the data was likely to be more accurate.

The database in zipped form can be downloaded by clicking on the link below. The database is organised into HAWTs and VAWTs with four files in each directory of turbines, namely 0-5kW, 5-50kw, 50-500kW and greater than 500kW. In each of these files, the turbines are listed under their manufacturers' names. It should perhaps be mentioned that a few turbines have names that do not contain the name of the manufacturer in them. An example is the popular Skystream turbine manufactured in the US by Southwest Windpower. If a turbine does not appear to be in the database, check first that you are looking under the right manufacturer's file. As already mentioned, if a turbine is not present, we will provide a power curve if you provide us with details of the turbine.

It should also be noted that manufacturers may upgrade the performance of their turbines from time to time and it would be wise to check that there haven't been very recent performance changes if you are using the WindPower program to help with selecting a turbine for some particular application.

Power curve download


(ii) The UK Wind Speed Database V2.0i program.
The program and its associated password costs 10.

The program is a MS Windows only program and will run on Windows XP, Vista, Windows 7 and the PC version of Windows 8 - but not on the tablet version (known as Windows RT).

Payment can be made by credit card or PayPal. Click on the "Buy Now" button below to go ahead with a purchase. Please allow a few seconds for a connection to the PayPal server.

IMPORTANT NOTE: If you buy the this program, you will find a link or a button after payment on the final PayPal payment page like those shown below
Return to windpower@pelaflow.co.ukOR Return to Merchant
Please make sure you click on this link to be transferred to our download webpage where you can download the full program and obtain the password.
PayPal change the layout of their payment pages from time to time so please ensure that you click on a return link on their completion payment page to be redirected to our download page.
If you have any problems with the download or queries about the program, please contact us through our Contact Us webpage.




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