scholarly journals Vortex profile analysis under different diffuser size for inlet channel of gravitational water vortex power plant

2022 ◽  
Vol 1217 (1) ◽  
pp. 012014
Author(s):  
F M Tamiri ◽  
E C T Yeo ◽  
M A Ismail
Keyword(s):  
Power Plant ◽  
Profile Analysis ◽  
Tangential Velocity ◽  
Tangential Direction ◽  
Orifice Diameter ◽  
Inlet Channel ◽  
Large Reservoir ◽  
Speed Flow ◽  
Low Head ◽  
Flow Through

Abstract Hydropower is a renewable technology to store the amount of electricity which is the least expensive. Gravitational Water Vortex Power Plant is an ultra-low head micro hydropower system working ranging from 0.7 m to 2m without having the needs of a large reservoir and installation area. Several researches have been conducted on its basin configuration, orifice diameter, blade configuration, the geometry of the basin shape but not onto the addition of the diffuser at the inlet channel. The function of the diffuser is to direct the water into the basin allowing the water vortex to travel towards the tangential direction where this phenomenon will increase the rate of speed flow through the turbine. The simulation results showed that the addition of the diffuser has significantly increased the tangential velocity and the kinetic energy of the vortices. The increase in the velocity of the flow increased the height of the vortex which also led to the increase in the strength of the vortex and affects the vortex uniformity.

scholarly journals Computational and Experimental Investigation of Runner for Gravitational Water Vortex Power Plant

2017 ◽  
Author(s):  
Rabin Dhakal ◽  
Kshitiz Khanal
Keyword(s):  
Power Plant ◽  
Cfd Analysis ◽  
Blade Profile ◽  
Peak Efficiency ◽  
Ansys Cfx ◽  
Low Head ◽  
Curved Blade ◽  
New Type ◽  
Computational Fluid Dynamics Cfd ◽  
Flow Through

The gravitational water vortex power plant (GWVPP) is a new type of low head turbine system in which a channel and basin structure is used to form a vortex, where the rotational energy from the water can be extracted through a runner. This study is focused on the optimization of the runner to improve the efficiency of theGWVPP. Computational fluid dynamics (CFD) analysis iscarried out on three different runner designs with straight,twisted and curved blade profiles. ANSYS CFX was used to analyze the fluid flow through the channel, basin,turbine hub and blade, and results were used to evaluatethe efficiency of each of the runner designs. The CFDanalysis showed curved blade profile to be the mostefficient profile, with a peak efficiency of 82%, comparedto 46% for the straight blade runner and 63% for thetwisted blade version. An experimental test of the turbinesystem was carried out to validate the runner analysis, in ascale version of the GWVPP. The testing showed that therunner behaved as predicted from the CFD analysis, andhad a peak efficiency point of 71% at 0.5m head.

High Speed Flow through Perforated Plates

1960 ◽  
Vol 64 (590) ◽  
pp. 103-105
Author(s):  
P. G. Morgan
Keyword(s):  
Pressure Drop ◽  
High Speed ◽  
Perforated Plate ◽  
Wire Mesh ◽  
Flow Conditions ◽  
High Speed Flow ◽  
Perforated Plates ◽  
Speed Flow ◽  
Flow Through ◽  
Points Of View

The flow through porous screens has been widely studied from both the theoretical and experimental points of view. The most widely used types of screen are the wire mesh and the perforated plate, and the majority of the literature has been concerned with the former. Several attempts have been made to correlate the parameters governing the flow through such screens, i.e. the pressure drop, the flow conditions and the geometry of the mesh.

scholarly journals Numerical analysis of the inlet channel and basin geometries for vortex generation in a gravitational water vortex power plant

2020 ◽  
Vol 18 ◽  
pp. 161-166
Author(s):  
L. Velásquez García ◽  
◽  
A. Rubio-Clemente ◽  
E. Chica ◽  
◽  
...  
Keyword(s):  
Numerical Analysis ◽  
Power Plant ◽  
Vortex Generation ◽  
Inlet Channel

High Speed Flow Through Wire Gauzes

1959 ◽  
Vol 63 (584) ◽  
pp. 474-475 ◽  
Author(s):  
P. G. Morgan
Keyword(s):  
Pressure Drop ◽  
Pressure Loss ◽  
High Speed ◽  
Static Pressure ◽  
Flow Conditions ◽  
High Speed Flow ◽  
Speed Flow ◽  
Wire Gauze ◽  
Flow Through

The Flow of Fluids through screens has been widely studied with particular importance being attached to the measurement of the pressure drop caused by a screen and its relation to the screen geometry and the flow conditions. The majority of the investigations have been carried out on wire gauze screens mounted in ducts with air passing through them, the static pressure being measured on either side of the gauze. Attempts have been made by Weighardt Annand and Grootenhuisto correlate the gauze geometry with the pressure drop and to enable the pressure loss over a given screen and with given flow conditions to be predicted.

scholarly journals Optimization potential analysis of micro-hydro power plant (MHPP) from river with low head

2018 ◽  
Vol 153 ◽  
pp. 74-79 ◽  
Author(s):  
Romy Marliansyah ◽  
Dwini Normayulisa Putri ◽  
Andy Khootama ◽  
Heri Hermansyah
Keyword(s):  
Power Plant ◽  
Hydro Power ◽  
Potential Analysis ◽  
Low Head

scholarly journals The novel solution of ball valve with replaceable orifice. Numerical and field tests

2019 ◽  
Vol 9 (1) ◽  
pp. 253-259 ◽  
Author(s):  
Grzegorz Romanik ◽  
Janusz Rogula
Keyword(s):  
Power Plant ◽  
Experimental Verification ◽  
Theoretical Approach ◽  
Field Tests ◽  
Ball Valve ◽  
Numerical Calculations ◽  
Compressed Air ◽  
The Novel ◽  
Measuring Device ◽  
Flow Through

AbstractThe article presents the results of numerical calculations and experimental results of a flow through the orifice. Such a measuring device was built-into the ball valve that gave unique possibility of the orifice exchange without the pipeline disassemble. The advantages of using the prototypical solution has been described. This patented solution has been tested extensively for the durability and tightness. The article contains comparison between flow character in the case of single-hole orifice and a multi-nozzle one. The prototypical measuring device has been produced and assembled in compressed air system in the Power Plant Opole, that gave experimental verification of theoretical approach.

The Operating Condition Estimation of the Equipment in Decision-Making Process in the Hydro Power Plant Control

2014 ◽  
Vol 698 ◽  
pp. 785-789
Author(s):  
Yana Panova ◽  
Vladimir Derbenev ◽  
Anastasiya Zhdanovich
Keyword(s):  
Power Plant ◽  
Power Plants ◽  
Hydroelectric Power ◽  
Operational Control ◽  
Hydro Power ◽  
Operating Condition ◽  
Power Plant Control ◽  
Low Head ◽  
High Head ◽  
Sets Theory

This article is devoted to the principles of constructing the decision support information system at the hydroelectric power plants. It’s assumed that the fuzzy sets theory will be used for the representation of the information about the aggregates operating condition parameters. The paper reflects the advantages of such an approach. The calculations were done for the equipment of the low-head (Novosibirskaya HPP, Hydro Power Plant) and high-head (Sayano–Shushenskaya HPP) power plants. The results obtained are intended for solving the HPPs operational control problems.

Formation of Hexagonal Monolayers by Flow of Bead Suspensions Into Flat Microchambers

2003 ◽  
Author(s):  
Markus Grumann ◽  
Patric Schippers ◽  
Michael Dobmeier ◽  
Stefan Ha¨berle ◽  
Andreas Geipel ◽  
...  
Keyword(s):  
Hydrodynamic Resistance ◽  
Inlet Channel ◽  
Cfd Simulations ◽  
Outlet Channel ◽  
Bead Diameter ◽  
Flow Through ◽  
Bioanalytical Assays ◽  
Pressure Driven Flow ◽  
Complete Process ◽  
Microfluidic Structure

To realize a highly parallel optical detection in bead-based bioanalytical assays, we investigate the hydrodynamic aggregation of bead suspensions in a hexagonally periodical monolayer by a pressure-driven flow through a microfluidic structure. This device consists of one inlet channel connected to a shallow chamber with a depth that only slightly exceeds the diameter of the beads. To enforce the aggregation of the beads, the flow leaves the chamber via outlet channels possessing a depth smaller than a bead diameter. This way the outlets act as barriers to the beads and force them to accumulate in the chamber. Benchmarking different chamber and outlet designs we found an optimum filing behavior for a rhombus-like aggregation chamber connected to a single outlet channel at the same width as the chamber. Here, the aperture angle of 60° fosters hexagonal aggregation patterns which leads to the highest packaging density. Reproducible filling ratios of more than 94% have been achieved. The rhombus-like chamber also shows the shows the smallest increase of the hydrodynamic resistance during filling and the best rinsing behavior which allows to minimize the volume of washing detergents used for a bioassay. Zones of accumulated beads redistribute the hydrodynamic flow through the device during the filling process. CFD-simulations, embedded in an iterative master-routine, are carried out to describe the complete process of filling and to assist the process of design optimization.

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