Our mission is an environmental one. Profit is the way by which we achieve our mission. We know we have to make money in order to attract and sustain capital investment in order to install more systems in order to meet our environmental goals. So making money and achieving our mission go hand in hand. … Read more
GreenBut Energy Inc. is a “for profit” corporation that designs, manufactures, installs and maintains Archimedes screw generators for low head micro hydro water power sites.
There are lots of good reasons to use renewables. You will be: making use of secure, local resources reducing your dependence on non-renewable energy helping to keep the air clean helping to reduce the production of carbon dioxide and other greenhouse gases ( find out why your carbon footprint matters) creating new jobs in renewable … Read more
We’ve all heard of solar panels and wind turbines, but renewable energy covers more than that. It is energy from any source that is naturally replenished when used. Often called ‘renewables’, ‘green energy’, ‘microgeneration’ or ‘sustainable energy’, the main sources of renewable energy for the home are: energy from sunlight heat from the earth, the … Read more
Assume the grid power is down. Grid power comes back on. Time delay relay in our controls waits 6 minutes to turn our control panel on. Panel verifies that frequency and voltage of the grid are okay. If frequency and voltage are okay, the panel releases the turbine brake . Automated sluice gate then starts … Read more
A weir is an impervious barrier constructed across a river to raise the water level on the upstream side. The water is raised up to the required height and the water then flows over the weir. In a weir the water overflows the weir, but in a dam the water overflows through a special place … Read more
[fancy_list style=”arrow_list”] very cost effective relative to other turbines and waterwheels better efficiency at less than optimum flows compared to other turbines and water wheels. relatively simple to install, use and maintain slow rpm’s and therefore longer lasting bearings robust highly reliable design using standard 3 phase generators and other components easily available ability to … Read more
The diagram below shows the operating ranges of various turbines in terms of head and flow rate.
Who cares? Is efficiency a better measure of performance of your system than your rate of return in your investment? However, if you must know we have a 500 Watt (very small) test screw with a maximum efficiency of 75%. Larger screws get more efficient largely due to efficiency increases of the larger gear motors, … Read more
Good question. We call it a turbine but it really doesn’t fit into one of the two main classes of water turbines, those being impulse turbines and reaction turbines. Here’s why; 1. Reaction turbine blades (runners) are fully immersed in water and are enclosed in a pressure casing. The blades are angled so that pressure … Read more