Status of micro-hydrokinetic river technology in rural applications: A review of literature

Vermaak, H.J.; Kusakana, K.; Koko, Sandile Phillip

doi:10.1016/j.rser.2013.08.066

Cited by 194 publications

(130 citation statements)

References 25 publications

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“…Although wind turbine technology has been studied and employed to generate electricity worldwide, extracting energy using hydrokinetic turbines is relatively new and still in its early stages of Applicability of shroud in hydrokinetic turbine technology was mentioned as an advantage compared to wind turbine technology since there is much less need for a yawing system in water streams than in the wind. A shroud can also be used as a structure to float the turbine in the water or to install it on the riverbed or as a casing for components of the generator (Drouen et al, 2007 some with feasibility studies for a particular location (Bahaj, 2011;Güney and Kaygusuz, 2010;Hassan et al, 2012;Lago et al, 2010;Nicholls-Lee and Turnock, 2008;Vermaak et al, 2014;Yuce and Muratoglu, 2015).…”

Section: Shrouded Hydrokinetic Turbinesmentioning

confidence: 99%

Effect of shroud on the performance of horizontal axis hydrokinetic turbines

2015

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Section: Shrouded Hydrokinetic Turbinesmentioning

confidence: 99%

Effect of shroud on the performance of horizontal axis hydrokinetic turbines

2015

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“…Small and medium-size plain rivers are characterized by low flow velocity; whereas the cut-in speed of some hydrokinetic turbines is 0.5 m/s (Vermaak et al 2014;Yuce, Muratoglu 2015). Therefore, duration of average velocities in the river cross-section per year indicates opportunities of the river to generate hydrokinetic energy.…”

Section: Assessment Of Hydrokinetic Resource Indices Of Ungauged Riversmentioning

confidence: 99%

Assessment of hydrokinetic resources of small and medium-size rivers: the Lithuanian case

Gailiušis¹,

Jakimavičius²,

Šarauskienė³

et al. 2017

Baltica

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The aim of the study is to assess hydrokinetic energy resources of small and medium-size rivers in Lithuania. The estimation of technical resources was carried out for river segments, where for average longterm runoff the flow velocity exceeded 0.4 m/s, and the average depth was more than 0.5 m. The results of hydrological studies were used to calculate the average flow rate and the relationship between flow velocity and river depth. The width and depth of the river channel was estimated in accordance with physical and geographical factors. Part of the favourable for use sites of rivers located within protected areas cannot be used for energy production because of the priority of environmental protection. Navigation, recreation and other factors also limit the use of streams for energy production. In addition, in winter due to ice phenomena, hydrokinetic devices in small and medium rivers should be protected from mechanical obstacles. Moreover, Lithuania is a flat country and available hydrokinetic resources of such plain rivers are very small. Their estimated capacity comprises 13.6 MW, and they can generate 79.4 GWh of electric energy per year.

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“…(2), it is possible to evaluate the C p response at different values of the tip speed ratio and pitch angle. This leads to the C p (λ, θ) versus λ characteristics for various values of θ, as depicted in fig.…”

Section: Rotor Design Of a Horizontal Axis Hydrokinetic Turbinementioning

confidence: 99%

“…The design of the rotor is considered to be a primary challenge from both hydrodynamic and economic standpoint. The performance of the rotor is a function of the number of blades, tip speed ratio, type of airfoil, power coefficient, blades pitch, chord length and twist and distribution along the blade span [2].…”

Section: Introductionmentioning

confidence: 99%

Design of a hydrokinetic turbine

Chica

Pérez

Rubio-Clemente

et al. 2015

WIT Transactions on Ecology and the Environment

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Hydrokinetic turbine power production depends on the interaction between the rotor and water. Therefore, an optimum geometry of the rotor must be designed and constructed to capture the maximum water energy and convert it into a usable energy. The steps involved in the design and numerical simulation of a small horizontal axis hydrokinetic turbine rotor are presented based on the same incompressible flow techniques used for designing wind turbines. Three blades of a 1 Hp (746 W) prototype hydrokinetic turbine were designed for a water velocity of 1.5 m/s with a tip speed ratio of 6.325, an angle of attack of 5• and 0 • as the pitch angle; in order to obtain the maximum power coefficient of the turbine. This coefficient was 0.4382, near the Betz limit. S822 airfoil was used to generate the coordinates of the blade. CFD simulation was carried out using Ansys CFX to estimate the performance of the blade design. Furthermore, FEM was successfully used for stress calculations on turbine blades under the influence of centrifugal and hydrodynamic loading.The designed hydrokinetic turbine can be used for pico hydro generation in rural communities non-connected to electricity services through the national interconnected electric system, due to its simple structure, and low cost of initial investment. Additionally, it can be locally manufactured, the environmental impact is negligible, since large dams are not involved, and the schemes can be managed and maintained by the consumer.

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Status of micro-hydrokinetic river technology in rural applications: A review of literature

Cited by 194 publications

References 25 publications

Effect of shroud on the performance of horizontal axis hydrokinetic turbines

Effect of shroud on the performance of horizontal axis hydrokinetic turbines

Assessment of hydrokinetic resources of small and medium-size rivers: the Lithuanian case

Design of a hydrokinetic turbine

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