Performance analysis of multi-stage gravitational water vortex turbine

Ullah, Rizwan; Cheema, Taqi Ahmad; Saleem, Abdul Samad; Ahmad, S.M.; Chattha, J. A.; Park, Cheol Woo

doi:10.1016/j.enconman.2019.111788

Cited by 36 publications

(24 citation statements)

References 16 publications

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“…Until 2019, no top energy journals had published any studies on GWVHT systems. However, since 2019, six papers have been published in Renewable Energy [36][37][38][39][40][41] and four papers have been published in Energy [42], Energy Conversion and Management [43], Applied Energy [44], and Energies [45], which are among the top journals in the energy field.…”

Section: Overview Of Past Studies On Gwvht Systemsmentioning

confidence: 99%

A Review of Gravitational Water Vortex Hydro Turbine Systems for Hydropower Generation

2023

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Hydropower is one of the most sustainable and desirable renewable energy sources. Gravitational water vortex hydro turbine (GWVHT) systems are one of the most suitable and sustainable renewable power generation devices for remote and rural areas, particularly in developing countries, owing to their small scales and low costs. There are various GWVHT systems with different configurations and various operating conditions. The main components of a GWVHT system include the inlet and outlet channels, a basin, and a turbine on which there are a number of blades attached. This paper presents a comprehensive review regarding the progress and development of various GWVHT systems, covering broad aspects of GWVHT systems, particularly various types of basins, inlet and outlet channels, turbines with blades which have different shapes, orientations, sizes, numbers, etc. The nature of the previous studies is summarised. The fundamentals of the vortex dynamics involved and the quantitative analysis of the performance of GWVHT systems are also described. The turbulence models and multiphase models used in some leading numerical simulation studies have been reviewed. As a case study, the implementation of a GWVHT system in PNG is presented. Based on the review of previous studies regarding GWVHT systems, the major issues and challenges are summarised, and some key topics are recommended for future research work on the performance of GWVHT systems.

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Section: Overview Of Past Studies On Gwvht Systemsmentioning

confidence: 99%

A Review of Gravitational Water Vortex Hydro Turbine Systems for Hydropower Generation

2023

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“…The height and diameters (top and bottom) of the runner, the inlet and the outlet angles, the helical pitch angle, the number of blades and the position in the basin. The height and diameters of the runner, number of blades, inlet, outlet and helical pitch angles were assigned by considering the available literature [14,20,21,[22][23][24]. During the analysis process, three different positions of the runner were compared.…”

Section: Runner Configurationmentioning

confidence: 99%

Runner optimal position in a gravitational water vortex hydraulic turbine with spiral inlet channel and a conical basin

García¹,

Rubio-Clemente²,

Chica³

2022

REPQJ

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A gravitational water vortex hydraulic turbine (GWVHT) is a low head hydropower technology with a vertical runner for extracting energy from the water vortex. To determine the optimal position (h) of the runner for the hydropower plant efficiency to be increased, a runner in three different positions was compared using computational fluid dynamics (CFD). The position of the runner was a function of the basin height (H). The maximum efficiency (44.15%) was established when the runner was located at 60% of H. The angular velocity associated with the maximum efficiency was 14 rad/s.

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“…Ullah et al [39] studied the performance of a multi-stage GWVHT with conical basin. Rotational velocity, momentum, and efficiency were evaluated under different load conditions.…”

Section: Experimental Studiesmentioning

confidence: 99%

Untitled

2021

JESTR

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The availability of energy has been essential for humanity, which increasingly demands more energy resources to cover its consumption and well-being. Due to the rapid depletion of fossil fuels and climate change, use of alternative energy sources such as non-conventional renewable energy sources is fundamental. Within non-conventional renewable energy sources, small-scale hydroelectric power is an excellent option in the generation of clean energy. Its development has a long useful life with more than 100 years and still with possibilities for new designs and technological adaptations. Among these new designs are the gravitational water vortex hydraulic turbines (GWVHTs). A GWVHT is a run-of-river (ROR) hydropower system that harnesses the kinetic and potential energy of an induced vortex. Its main advantage is the ability to generate energy in low ranges of head and flow. The GWVHT is a new turbine with an efficiency between 17 and 85%, which still needs more research to optimize the geometry of the basin, inlet channel, and runner. This work presents a comprehensive analysis of various aspects of GWVHT such as modeling, optimum sizing, performance, and challenges to establish a starting point for further research. Until now, the studies have proved that the conical basins are better than the cylindrical basins, but they do not identify the dimensions of the geometry. With respect to the runner, the shape or number of blades has been varied, but the investigations show contradictory results.

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Performance analysis of multi-stage gravitational water vortex turbine

Cited by 36 publications

References 16 publications

A Review of Gravitational Water Vortex Hydro Turbine Systems for Hydropower Generation

A Review of Gravitational Water Vortex Hydro Turbine Systems for Hydropower Generation

Runner optimal position in a gravitational water vortex hydraulic turbine with spiral inlet channel and a conical basin

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