Author(s): Oguz Hazar; Sebnem Elci
Linked Author(s):
Keywords: Wind-powered; Artificial mixing; Destratification efficiency; Savonius rotors
Abstract: Lakes and reservoirs play vital roles in providing drinking water, irrigation, and serving industrial needs. It is increasingly critical to manage sustainably these resources. The temperature-induced thermal stratification in large water bodies can have detrimental effects on water quality. Destratification/mixing of the water column through aeration often seen as a preferred method. Wind energy as a renewable energy is being harnessed worldwide. In our study, we constructed Savonius turbines featuring both three-stage and four-stage rotors equipped with flexible stages. These turbines were designed to directly harness wind energy and transfer it to air pumps for water column aeration, bypassing the conversion into electrical power. Efficiency of the turbines were evaluated through the power coefficient (Cp), torque coefficient (Ct) and tip speed ratio (TSR). A three stage rotor with the flexibility of having all its blades aligned, 3S (0), or configured with a 60-degree phase shift between the stages, 3S (60), a four-stage rotor capable of adjusting its blades to be either fully aligned, 4S (0), separated by 90 degrees between the stages, 4S (90), or 45 degrees between the stages, 4S (45) are tested in the destratification experiments with using single, double and triple pumps.
Year: 2024