Development and Testing of Runner and Conical Basin for Gravitational Water Vortex Power Plant

Dhakal, Subash; Nakarmi, Susan; Pun, Pikam; Thapa, Arun Bikram; Bajracharya, Tri Ratna

doi:10.3126/jie.v10i1.10895

Cited by 70 publications

(70 citation statements)

References 6 publications

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“…RPM was recorded with a data logger as the number of times the switch opened per minute. While a constant water height was assumed by [28], the variation in vortex height with tank and turbine conditions was accounted for here by measuring the height for each new SB setting when testing the various turbine and inlet configurations. In line with [27], the vortex height was measured at its maximum, the outermost height at the tank wall.…”

Section: Methodsmentioning

confidence: 99%

“…GVHP was investigated experimentally as a solution for the low head water resources available in the Terai region of Nepal [28]. The laboratory model used consisted of a cylindrical tank, 0.85 m high and 0.6 m in diameter, with various vertical axis turbines placed in the centre.…”

Section: Experimental Gvhp Studiesmentioning

confidence: 99%

“…As will be discussed later, the results of this paper show the opposite finding. However, 2 and 4 blades were compared in this study whereas [28] use up to 12 blades. This suggests that while more blades will extract greater power due to increased torque, there is an optimum number beyond which any additional blades will increase the turbine weight too much.…”

Section: Experimental Gvhp Studiesmentioning

confidence: 99%

“…Finally, a numerical test of a site rig on a river in Nepal was discussed. However, the basis of analysis is vortex strength rather than power output so it remains unclear how GVHP would perform in a larger setting [28].…”

Section: Experimental Gvhp Studiesmentioning

confidence: 99%

See 3 more Smart Citations

A Parametric Experimental Investigation of the Operating Conditions of Gravitational Vortex Hydropower (GVHP)

Power¹,

McNabola²,

Coughlan³

2015

JOCET

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Abstract-Globalenergy consumption is growing considerably, raising such issues as increased energy-related greenhouse gas emissions, reduced security of supply, and growing fuel costs. Renewable resources, such as hydropower, offer an alternative energy source to meet the growing demand. Small hydropower (SHP) has been a major focus of hydropower research in recent years, as many of the large scale hydroelectric opportunities around the world have already been exploited. In particular, low head SHP is gaining interest as traditional turbines, such as the Kaplan and Pelton turbines, are typically limited to heads greater than 3m. Gravitational vortex hydropower (GVHP) is one such low head hydropower solution. GVHP exploits the energy available in a vortex flow, enabling hydropower generation at heads as low as 0.7m. A vertical axis turbine is placed in the centre of a vortex flow and rotates with the flow, thus generating mechanical energy. This paper describes a parametric experimental investigation of the operating conditions of GVHP. Various flow rates, inlet conditions, blade sizes and blade numbers were tested and the turbine rotational speed, vortex height and applied resistance force were recorded for each setting. The power input, power output and efficiency were then calculated and compared for the various settings. It was found that the turbine efficiency increases with blade size and blade number for the blade configurations tested. Maximum power outputs were found for the largest flow rate tested and when there was a considerable resistance force applied to the turbine. Finally, of three inlet heights tested, a height of 25 cm above the tank base (35% of the overall tank height) was found to be optimum for turbine performance. These results have implications both for future research and for practice, with energy generating applications in low head rivers and in wastewater networks.Index Terms-Clean energy, experimental model, gravitational vortex hydropower (GVHP), low head, new energy device.

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Section: Methodsmentioning

confidence: 99%

Section: Experimental Gvhp Studiesmentioning

confidence: 99%

Section: Experimental Gvhp Studiesmentioning

confidence: 99%

Section: Experimental Gvhp Studiesmentioning

confidence: 99%

See 2 more Smart Citations

A Parametric Experimental Investigation of the Operating Conditions of Gravitational Vortex Hydropower (GVHP)

Power¹,

McNabola²,

Coughlan³

2015

JOCET

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“…A literature review on devices that generate electricity through a vortex of gravity and other energy conversion systems [17][18][19][20] shows that free Vortex power plants have been developed. [20] parametrically studied variables affecting the power generated by a plant with a gravitational Vortex, with a discharge hole of constant diameter.…”

Section: Introductionmentioning

confidence: 99%

Horizontal vortex single chamber hydroturbine

Zarate-Orrego¹,

Torres-Casierra²,

Risco-Moreno³

2016

Rev. Fac. Ing. Antioquia

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ABSTRACT:A machine with high-form resistance was evaluated in order to extract energy from a creek, river or ocean stream, and generate electricity. Without appropriate instruments, research turned into qualitative. It was assumed that if it still worked, its behavior may improve softening its form. The device has a semi-convergent nozzle with flat walls, a cylindrical Vortex Chamber and a runner. It captures water through its largest section and downloads tangentially by its lower section into the Vortex Chamber. It has a hole in one of its sidewalls. This way, it forms a horizontal vortex that spins a rotor whose shaft drives an electric generator. The experimental work carried out showed that it is possible to generate electricity with this device despite the adverse conditions in which it was tested. RESUMEN:Se evaluó una máquina con alta resistencia de forma para extraer energía de una quebrada, río o corriente marina, y generar electricidad. Sin instrumentos adecuados, la investigación fue cualitativa. Se supuso que si aun así funcionaba, su comportamiento podía mejorar suavizándose la forma. El aparato tiene una tobera semi-convergente de paredes planas, una cámara de vórtice cilíndrica y un rodete. Capta agua por su sección mayor y la descarga tangencialmente por su sección menor en la cámara de vórtice; ésta tiene un orificio en una de sus paredes laterales. Así forma un vórtice horizontal que hace girar un rodete cuyo eje acciona un generador eléctrico. El trabajo experimental realizado mostró que sí es posible producir energía eléctrica con este dispositivo pese a las condiciones adversas en que se ensayó.

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