9. THE DOWNLOAD AND PURCHASE PAGE (Scroll or click to select).
(i) The WindPower program V2c (ii) The UK Wind Speed Database program
(iii) Power curve database.
(i) The WindPower program V2c.
The full version of the program costs £15 - about 22 US$'s or 17 Euros. Payment can be made in any currency. There is also a free trial version with the limited features listed in the table below. The main restriction of the trial program is that turbine power curve data cannot be loaded from or saved to the free database but has to be entered manually. Both programs will run on all versions of Windows and require 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 |  |
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| Power curve data can be saved to and loaded from the database | |
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| All data can be printed to a hardcopy or pdf printer | |
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| All data can be exported to spreadsheets | |
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| Mean power and annual energy calculations | |
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| Return on investment calculations | |
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| Payback period calculations | |
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| Cost per kilowatt-hour calculations | |
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| Power output profile | |
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| Ratio of local power usage to total power output | |
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| Saveable comment box for turbine details | |
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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.
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IMPORTANT NOTE: If you buy the full version, you will find a link or a
button on the final PayPal payment page like those shown below
Return to Merchant OR Return to Windpower@pelaflow.co.uk
Return to Merchant OR Return to Windpower@pelaflow.co.uk
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.
The WindPower program is straightforward to use but, if you prefer, we can prepare a report for you on the performance and economics of one or more turbines. Please contact us for a quotation.
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.
(ii) The UK Wind Speed Database program.
This program has been discussed on webpage 7. The program and its associated password costs £5. 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 on the final PayPal payment page like those shown below
Return to Merchant OR Return to Windpower@pelaflow.co.uk
Return to Merchant OR Return to Windpower@pelaflow.co.uk
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.
(iii) The wind turbine database - February 2012.
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.
These files can be opened in a text program like Notepad and they can also be imported directly into spreadsheet programs like Excel. The format is turbine name, integer part of the turbine blade diameter, decimal part of the blade diameter, the cut-out speed, the cut-in speed and then the thirty values of the steady power output starting at 1 metre/second and going up to thirty metres/second.
