Reason For a improved Design

1. Air flow can be necessary for many different applications. The purpose of the American Eagle windmill is to produce air to a system using only wind energy. This brand of windmill is of need of more efficiency. Our improved windmill Prototype was constructed to increase the amount of air that the windmill can produce as the windmill shaft rotates. In this test we showed the percentage on increasing efficiency as listed in the result portion of this lab and by how much mass flow of air was produced by our design. The lab test had already been conducted on the old windmill. This lab will compare the old data from the old windmill and compare it to the prototype. The need for a windmill was presented for creating a septic system for third world country that requires no electricity to process. Reason For a improved Design How The Prototype Was Tested Results The mean average of increase in effeminacy was 364.26%. Error/Discussion While running the experiment the first error was discovered. It was obvious that as there was more air produced out of the air stone, the air stone was moving around in the tank till it would lodge against the side and air was being released in between the tanks and loss to the outside environment. It seemed as creating more flow also created more pressure needed to run the prototype. But the difference from the old windmill and the prototype more force was needed but over comes the affect by producing a 364.26% increase in volumetric flow. To sacrifice a few mph winds for 364.26%more air flow. Conclusion When this project started our team noticed flaws with the existing windmill. Through the last year we have developed solutions to the problems for the prototype. We feel that if the air stone did not create error we might have tested above 400%. In the slower RPMs a increase of almost 500% was reached. By creating the prototype the improved windmill could replace up to 4 windmills of the old windmill system. First, after finishing construction of the prototype, the prototype was placed on a table and strapped down securely by ratchet straps and C-clamps. A 2.5hp electric motor was placed on the tabled just above the top of the prototype windmill shaft. A belt pulley placed on the outer shaft of the windmill to act as the propellant of the shaft as if the wind was blowing the blades of the windmill. Then two tanks were placed outside with one open at the top and the other open at the bottom. The tank that is open at the bottom was slid inside the other. The open top tank has the air stone and hose already installed in the tank. A hose was placed in the exhaust of the windmill to the tank. The tank was then filled to the top with water to create a seal so that the air produced by the air stone would raise the bottom opened tank. A counter balance weight was placed by pulleys to oppose the weight of the tank. Set up for the new prototype is shown in figure 1. The test was setting the motor to a certain RPM setting and measure the time for the tank to rise to a point that 50 gallons of air had filled the tank and raised the top tank to a drawn line on the tank. Three runs at each RPM setting were taken. The RPM settings were 12, 24, 40, 61, 80, and 100. David Martin (PM 495a, ME) Chris Doty (PM 495b,ME) John Goodloe (ME) ChristophKarottki (ME) SEC# 84 Improved Windmill Design