How do you know if you have a site suitable for generating electricity?
To establish if your site is suitable for generating electricity you need to have flowing water and you need to know the three key components, which are WATER VELOCITY (in metres per second), AREA (in square metres) and HEAD (in metres).
The more flowing water you have, the more potential power you can generate. The Water Velocity can be estimated by recording how long (in seconds) a ‘floating object’ (such as a ball) takes to travel over a given distance (in metres). Divide the distance by the time taken and you will have the Water Velocity (in metres per second).
The Area is calculated using the simple equation of:
Depth (in metres) x Width (in metres) = Area (in square metres)
The water needs to drop, or fall, a distance of between 1 and 5 metres. Measure how far the water falls in metres.
To calculate the power generated by the above figures use the following equation which will estimate the potential power:
Water Velocity(metres per second) x Area (in square metres) x Head (in metres) x 9.81 (Constant for Gravity) = Potential Energy (in kilowatts)
Most turbines work on an efficiency of up to 70%, however our Archimedes Screw can give efficiencies of up to 80%, using this value would give you the expected output from the site.