Baugh Wind Energy Design Competition Saturday, 9 February 2019

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1 Baugh Wind Energy Design Competition Saturday, 9 February 2019 Oklahoma Christian University is pleased to announce the third annual wind energy design competition for middle school and high school students. The competition will be held on Saturday, 9 February 2019 at the College of Engineering and Computer Science on the campus of Oklahoma Christian University. Figure 1. The mechanical engineering department at OC has an ongoing research project to improve wind turbine efficiency (WIND: Wind Innovations, Next Designs). The objective of the Baugh Wind Energy Design competition is to challenge the next generation of scientists and engineers to design, build, and demonstrate optimum wind turbine rotors. Teams will: (1) design and fabricate an optimum rotor that demonstrates improved efficiency as compared to conventional designs, (2) Write a design report that documents research, design trade-offs, laboratory testing and final fabrication, (3) Prepare an oral presentation (poster, PowerPoint or equivalent) to be presented on competition day and (4) test their wind turbine in the OC wind tunnel. Cash prizes and trophies will be awarded to the STEM organizations of the winning teams: 1. First Place: $ Second Place: $ Third Place: $ Halladay 1 Design Award for Exceptional Ingenuity: $1000 The Halladay design award for exceptional ingenuity was established in anticipation of something AMAZING that your students will bring to competition! Exceptional ingenuity is very difficult to describe, but OBVIOUS when we see it. Daniel Halladay s 1854 patent for a very successful American water windmill is an excellent example of exceptional ingenuity. This prize may NOT be awarded every year! The panel of judges who judge the design report and oral presentation will also recommend the EXCEPTIONAL INGENUITY winners. Important deadlines: 7 December 2018 Application should be submitted (Limited to 12 teams) 1 February 2019 Design Reports due at 5:00 p.m. 8 February 2019 Optional Rotor pretest by 5:00 p.m. Teams should consult the competition web site for additional information Patent for Successful American Water Windmill 1

2 General Contest Rules 1. Teams will consist of between two and ten members. 2. Team members must be middle school or high school students, age 11 18, at the time of the competition. 3. Each team must have a team mentor (teacher, parent or team member who is at least 18 years of age) who will serve as contact person with competition officials. 4. Teams are required to submit a Design Report by 5:00pm on Friday, February 2, Teams are required to prepare an oral presentation for the day of the competition. Turbine Rotor Design Constraints 1. Each team will be provided with a design kit consisting of a circular hub and twelve six inch dowel rods (Figure 2). The circular hub has an axial hole in the middle for ease of mounting on the test apparatus inside the OC wind tunnel and twelve radial holes evenly spaced on the circumference. Figure 2. WIND Rotor Design Kit (Six Dowels Shown, Twelve Dowels Provided) The radial holes will be properly sized for 6.35mm (0.25in) wooden dowel rods. Rotor blades will be attached to the dowel rods and mounted in the hub using 6.35mm (0.25in) dowel rods. The rotor will spin on a horizontal shaft in the wind tunnel test apparatus. 2. Each team s rotor must be able to fit through the OC wind tunnel access panel, which has dimensions of 457 mm (18in) wide by 178 mm (7in) tall. Therefore it must fit inside a cylinder with a diameter of 381mm (15in) and height of 102 mm (4in). 3. The rotor must weigh no more than 0.34kg (0.75lbs). 4. Each team s rotor will be tested at a wind speed of 6.1 m/s (20ft/s) and rotor speed of 200 RPM. The rotor can be pre-tested using a carpet squirrel fan. 5. Each team will design their rotor by choosing the number of blades, the shape of each blade, the pitch angle of each blade, etc. 2

3 6. While the dowels will fit snugly in the hubs, they must be secured with glue before testing in the wind tunnel. Rotor designs must be tested for safety requirements at contest registration. 7. Teams are encouraged to pretest their rotors before competition day. A five point bonus will be awarded to teams that arrange to pretest their rotor before 5:00 p.m. on Friday, 8 February Design Report and Presentation 1. A design report (*.pdf format) must be submitted on or before 5:00 p.m. on Friday, 1 February 2019 by to Wayne.Whaley@oc.edu (Phone: ). 2. All specifications must be reported in both SI and US Customary System units. (Example: dimensions reported in mm and inch.) Design Reports must include the following items: a. A Literature Survey of existing turbine designs and their pros and cons. b. Details of the design process followed, including descriptions of other designs considered. c. Details of the construction process used to fabricate the rotor. c. Dimensioned drawings of the rotor (CAD is allowed, but not required) d. Analysis or testing to prove that the system will not fail and damage the OC wind tunnel during the competition. e. Cost of parts and materials used to fabricate the rotor. 4. The team must also provide a Presentation, in the form of a Poster, PowerPoint, or other approved media, to include the following items: a. An overview of the research completed during the design process. b. Explanation of the benefits of your team s design relative to standard commercial designs. c. Drawings or photos of the final design. d. Analysis or experimental data that guided the design process Competition Day Procedure 1. Design Validation: A team representative will take the team s rotor to the Design Validation Station so that the judges can verify that the design satisfies all specifications. Teams who pretested their rotor will be required to repeat the design validation on competition day. a. Each rotor will be weighed to verify it does not exceed 0.34kg (0.75lbs). b. Each rotor will be tested to make sure it fits inside a cylinder with a diameter of 381 mm (15in) and height of 102 mm (4in). c. Each rotor will be spun at 500 RPM for 30 sec. to verify structural integrity. d. The validated rotor will remain in the fluids lab until time for wind tunnel testing. 3. Oral Presentation: A team member will explain their rotor design in a five-minute oral presentation followed by a five-minute question and answer period. 4. Wind Tunnel Testing: Each validated rotor will be tested in the OC wind tunnel according to the random schedule determined by the head wind tunnel judge. The rotor will be connected to a small electric generator (small hobby DC motor operating as a generator) through a 10.9:1 gear ratio so that the generator speed will be approximately 50% of the rated 3

4 maximum speed for best generator efficiency. A team member will mount the rotor in the wind tunnel. The wind tunnel judge will verify that the rotor is secure once the design is mounted and then close the wind tunnel access window. 5. The wind speed will be gradually increased to the specified value of 6.1m/s (20ft/s). Once the wind speed is set, the load on the generator will be adjusted until the rotor slows down to 200 RPM. 6. The power produced by each team s rotor will be determined by measuring the voltage and current produced by the electric generator. Power is the product of voltage and current. Power= Voltage (Volts)*Current (Amps) Scoring Categories Scoring will consist of five categories: Design Report, Presentation, Cost Effectiveness, Creativity and Average Power Produced. Teams will be ranked according to total number of points awarded in all categories. Design Report (25 points) A panel of judges will read each team s design report and assign up to 25 points in each of the following areas: 1. A Literature Survey of existing turbine designs and their pros and cons. 2. Details of the design process followed, including descriptions of other designs considered. 3. Dimensioned drawings of the rotor (CAD is allowed, but not required) 4. Analysis or testing to prove that the system will not fail and damage the OC wind tunnel during the competition. 5. Cost of parts and materials used to fabricate the rotor. Cost Effectiveness (25) Cost effectiveness is determined by dividing the average power produced by the total cost of parts and materials used to build the rotor. The team with the maximum cost effectiveness will be awarded 25 points. Remaining teams will receive scores determined by: 4

5 Creativity (25 points) The points awarded for creativity will be based on the following characteristics: 1. A creative design is innovative, representing a groundbreaking way to harvest energy from the wind. 2. A creative design is unique. It is NOT copied from any web site, book, magazine article or wind generators that students notice near their communities. 3. A creative design must be practical. Teams must be able to fabricate a rotor that will be suitable for wind tunnel testing. Presentation (25 points) A panel of judges will assign up to 25 points in each of the following areas: 1. An overview of the research completed during the design process. 2. Explanation of the benefits of your team s design relative to standard commercial designs. 3. Drawings or photos of the final design. 4. Analysis or experimental data that guided the design process Average Power Produced (50 points) Voltage and current produced by the generator will be measured. The average power will be calculated by multiplying measured voltage by measured current. Early Rotor Testing (5 point bonus) Teams who arrange to test their rotor early (before 5:00 p.m. on Friday, 8 February 2019) will receive a 5 point bonus. 5

6 Contacts: Additional Information and Resources: Ms. Rosie Haulsey: Administrative Assistant, College of Engineering and Computer Science Phone: ) Dr. P.W. Whaley: Professor and Chairman, Department of Mechanical Engineering Pre-contest testing dates available. Contact Dr. Whaley for more information. Carpet Squirrel Fans; can be checked out at OC for testing the rotors at the appropriate wind speed. Kits for testing rotor designs with adjusted resistance will be provided upon request by Oklahoma Christian University. Placing one standard box fan in front of another will increase the wind-speed of standard fans enough to pre-test a design s durability in the wind tunnel. We recognize the potential need for added or clarified rules. Oklahoma Christian University will notify all participants in the case of any alteration of rules and documentation. 6