Topic: Autodesk
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Powering The Future: Model of a Hydroelectric Roller-Compacted Concrete Gravity Dam
A model hydroelectric roller-compacted concrete gravity dam and low-head turbine system was designed and constructed. In order accomplish this, a structure to contain both the reservoir and the dam was designed and constructed.
The dam for this project was designed using roller compacted concrete (RCC) because RCC is an important new innovation in dam construction. RCC dams allow quicker and more economical construction than conventional concrete dams, and are more reliable than earthen dams. The dam was designed to be 6.5 feet wide, 14 inches high, and to have 1 inch lifts.
The dam section was meant to model a 50 foot high gravity dam. A mix design was selected of 9% Type III Portland cement, 50% coarse aggregate, 35% fine aggregate, 6% water, and less than 1% superplasticizer by weight. For the power generation aspect of this project a crossflow turbine was selected because of its ability to run at low heads and flow rates as well as its manufacturability. Overall, the crossflow turbine was able to produce 12.8 watts of power at a 33.5% efficiency. Also, the turbine was able to run at a maximum efficiency of close to 43% at lower heads.
Autocad diagram of final frame design, Once the frame design was finalized and constructed, it was clear that bracing was needed for safety reasons during the construction phase and would remain for general stability post-construction. The bracing was designed to hold 2% of the vertical load on the columns
Source: www.engin.swarthmore.edu
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