Experimental and computational investigation of hydrokinetic turbine

Güneş, Anıl
The answer to the increasing amount of energy consumption, mostly in carbon-based energy sources can be found in water and through the wind. The investigation of a special drag-based cross-flow hydrokinetic turbine (referred to as a Vertical Axis Wind Turbine for wind energy applications) called Savonius, is the main purpose of this study. Both experimentally and computationally studying this high self-starting ability turbine will open up the way to small-size energy production with very small water and wind inflow velocities. This study aims to compare the computational results with experimental studies in a water channel, using three different turbine blade base geometries. The semi-circular blade geometry resulted in a good agreement between experimental and computational studies, where both peak around unity tip speed ratio and for maximum power coefficient the relative error is 7.8%. The computational results underestimate the performance compared to experimental result within a margin of 0.03 power coefficient, up to unity tip speed ratio. For lambda > 1 the difference in results of the power coefficient increase up to 1.0. For another base geometry with maximum chamber location near the blade tip, the results of CFD are in close agreement with experimental data for a tip speed ratio interval of 1.1 - 1.7, and deviate outside this range.


Ike-Offiah , Chiedozie Augustine; Orang, Ali Atashbar; Oğuz, Elif; Sustainable Environment and Energy Systems (2022-11)
With the ever-growing global interest in reducing greenhouse gases such as CO2, renewable energy options present a good energy alternative. Not only are they a sustainable option in their operational period, but they also have a low implementation cost especially, when compared to conventional fossil fuel sources. Hydrokinetic turbines have the advantages of energy predictability, relatively low visual impact, a high energy density, high capacity factor, and ease of manufacture, in addition to the low cost ...
Numerical simulations of gas production from Class 1 hydrate and Class 3 hydrate in the Nile Delta of the Mediterranean Sea
MEREY, ŞÜKRÜ; Longinos, Sotirios Nik (Elsevier BV, 2018-04-01)
Gas hydrate reservoirs are considered as near-future energy resources in the world. As well as the many places in the world, there is also gas hydrate potential in the Mediterranean Sea. In this study, by using the literature data, it was aimed to understand whether the Mediterranean Sea includes necessary parameters for producible gas hydrate reservoirs. It was shown that the Mediterranean Sea contains all of these parameters (source gas, appropriate pressure and temperature, coarse sand potential, etc.). ...
Modeling and design of a non-thermal plasma reactor for CO2 dissociation
Ahmed, Humayun; Taylan, Onur; Sustainable Environment and Energy Systems (2017-1)
The requirement of energy constantly increases with time, and one of the major sources of energy is fossil fuels which release carbon dioxide upon combustion. Environmentally, CO2 is a greenhouse gas which has had a tremendous impact on the Earth’s climate over the last few decades and the urges serious mitigation methods for the long-term sustainability of the Earth’s climate and ecosystem. One mitigation method is the dissociation of CO2 to produce synthesis gas which can be used to produce alternative hy...
Fluid-CO2 injection impact in a geothermal reservoir: Evaluation with 3-D reactive transport modeling
AKIN, TAYLAN; Baser, Ali; Saracoglu, Onder; Akın, Serhat (2022-01-01)
Geothermal energy is commonly recognized as an environmentally friendly source of energy. However, geothermal fluids have unusually high CO2 content, particularly, in carbonated geothermal reservoirs. An efficient method to mitigate the CO2 emissions of geothermal power plants is to re-inject the captured CO2 with the effluent fluid to mineralize mainly into calcite under reservoir conditions (e.g., reservoir temperatures ranging from 200 to 220 degrees C). One of the major concerns about the re-injection o...
Numerical simulations for short-term depressurization production test of two gas hydrate sections in the Black Sea
MEREY, ŞÜKRÜ; Sınayuç, Çağlar (2017-08-01)
Gas hydrates are considered as a promising energy source and the Black Sea has a high potential of gas hydrates. The Danube Delta of the Black Sea is the most well-known prospect in the Black Sea after many geological and geophysical studies such as bottom-simulation reflectors (BSR) and electromagnetic surveys. In this study, gas production simulations from two gas hydrate layers (6 m thick hydrate layer at 60 mbsf and 30 m-thick hydrate layer at 140 mbsf above BSR at 350 mbsf) at the same locations with a...
Citation Formats
A. Güneş, “Experimental and computational investigation of hydrokinetic turbine,” M.S. - Master of Science, Middle East Technical University, 2022.