Design & development of regenerative system for cooling tower system

Goh, Jee Boon (2015) Design & development of regenerative system for cooling tower system. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

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Abstract

Mr. Albert Einstein once said that, "The energy neither be created nor destroyed, it is transformed from one to another". Taking that into considerations, this project is intended to convert wasted kinetic energy into an electrical energy. The source of wasted kinetic energy being targeted is at cooling tower. Cooling tower has the most suitable wind speed being produced when it operate and the best part is the source is constant. To convert this type of kinetic energy, Bernoulli's Principle are taken into consideration in developing a viable wind turbine. The design of the turbine blade is done by using SolidWorks design software based on Humback whale inspired with tubercles of 5% scaled down from original aerofoil wingframe. The aerofoil geometry coordinated of the wingframe is imported from BAC:XXX-il which is now used on Boeing 747-8. A flow simulation of the blade is also executed using SolidWork. The mini prototype is fabricated using 3D printer and is proven to be functional. In addition, it achieved a Bronze Medal Awards in MINI UTeMEX 2014. Final prototype is done by 3D printing as well but is scaled-up according to a small size of a standard cooling tower. For the improvement of the wind turbine, a hybrid wingtip is designed and built to reduce the drag force behind the blades during the rotation. The SHIMANO dynamo hub DH-3N30 is used as a generator for the wind turbine. In the results of this project, the wind turbine achieved a rotation of 383rpm and generated maximum voltage of 61. 7vDC with 70° angle of attack at 4.3 7m/s wind speed. The overall targeted results of 60rpm and 12vDC is achieved. The results obtained far exceeded the initial target set by 638% in terms of turbine rotation and also the output voltage by 514%.

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