As an extension to the STELR wind energy investigations, Scott Sleap from STELR school, Maitland Grossmann High School, has his students designing and printing their own wind turbine blades. Schools who have access to 3D printers might like to do the same, so Scott has generously allowed us to share his assessment task with other STELR schools. At Scott’s suggestion, one of his year 10 students Ali, provided us with two designs for alternative turbine blades. Both were 3D printed in ABS and have been tested by comparing the voltage generated by each set with that generated by the STELR long, red turbine blades.
In the test, the ‘modified’ blades performed considerably worse producing around 2V compared with 4.5V from the red blades. As you will see from the video below, the ‘curved’ blades (once positioned optimally) performed considerably better.
To assist with blade design, technical specifications of the STELR turbine blade can be download. Use the specifications of the blade base so the design will fit into the STELR hub. A copy of the .stl file of the ‘curved’ blades tested in the video can be obtained by contacting the STELR office.