Showing results for: hydro turbine Articles
-
Modelling of the hydro-generator local network operation and load disturbance rejection
The paper describes models of the local network operation of the hydraulic turbine-generator unit. Two different models are proposed. They describe the dynamic behaviour of a system in which the unit is connected to an equivalent system. A nonlinear model of the interconnection to an equivalent power system is considered. An optimal controller for load disturbance rejection in water turbine speed ...
-
VSC with a T-connected transformer-based electronic load controller for an isolated asynchronous generator feeding three-phase four-wire loads in a micro hydro system
This paper deals with a novel solid state controller (NSSC) for isolated asynchronous generator (IAG) feeding three-phase four-wire loads driven by constant power prime movers, such as uncontrolled micro hydro turbines. AC capacitor banks are used to meet the reactive power requirement of the asynchronous generator. The proposed NSSC is realised using a set of IGBTs (insulated gate bipolar ...
-
Microhydro-Electric Systems Simplified
If you have a suitable site, harnessing the energy in a stream or creek can be the most cost-effective way to make renewable electricity. Compared to the sun and wind’s variability, a stream’s flow is relatively consistent, making microhydro-electric system output the most predictable of all the renewable energy (RE) electrical systems. Hydro resources are also the most site specific, ...
-
Micro Hydro Systems A basic overview of a hydro system with components explained
If you have a suitable site, harnessing the energy in a stream or creek can be the most cost-effective way to make renewable electricity. Compared to the sun and wind’s variability, a stream’s flow is relatively consistent, making microhydro-electric system output the most predictable of all the renewable energy (RE) electrical systems. Hydro resources are also the most site specific, ...
-
Powering Existing Control Dams - Case Study
There are thousands of non-powered dams in the United States and Canada, either for flood control, water level control, or even recreational purposes. Ossberger Hydro has different turbine configurations that help to minimize the civil work related to the turbine implementation on these existing dams and also provide the operation flexibility of managing high water level and low flow ...
-
Control of dynamic effects in small hydro with long hydraulic circuits
Lab tests in a long hydraulic circuit were developed to analyse hydrotransients induced by waterhammer effects under runaway conditions. The definition of suitable design criteria in hydraulic systems is of utmost importance and has become a priority for good design implementation. The dynamic behaviour of turbo-generators of small reaction turbines and the interaction with long hydraulic ...
-
Two proposals for unlimited fresh water
The world water crisis may be more serious than generally appreciated. One reason for this is that the main response has been to increase storage of rain rather than to increase the amount of fresh water. Another is that fossil groundwater has been widely seen as inexhaustible. Two fresh water collecting systems are outlined here and it is argued that they have no ultimate limitation, either by ...
-
A new design of a highly efficient hydraulic turbine on the basis of the specific hydrodynamic effect
Traditional free flow turbines slow down water stream using its kinetic energy. This article describes a method for deriving energy from a free water stream using a unique hydraulic turbine which unlike traditional hydraulic turbines speeds up the water stream using potential energy thanks to a specific hydraulic effect. The article also describes a method of mathematic calculations of output ...
-
A novel technique proposed for automatic control of small hydro power plants
A new scheme is proposed for the speed control of hydro turbines. Power can be controlled by controlling the rotary motion of the spear valve or linear motion of the sluice gate. In this paper, necessity for speed control, various function of governors, types, speed regulation of micro-hydroelectric power plants, functional block diagram of power generation and control system general models for ...
-
Water Line Project - Holloway Bar Placer Mine (archived)
One of the biggest problems with living in a remote area is access to facilities that we take for granted. If you want to watch TV, you need both a satellite dish and power to run the dish and TV. If you want to have a shower, you'll need some way to pump the water as well as heat it. If you want to cook some ham and eggs, you'll need to find a way to keep the food cool, or it'll turn into Dr. ...
-
Energy recovery potential using micro hydropower in water supply networks in the UK and Ireland
The supply and treatment of water is a highly energy intensive process, resulting in large amounts of greenhouse gas emissions as well as incurring large economic costs. Both governments and water service providers worldwide recognise the need for more sustainable water supply systems. In recent years, the use of hydropower turbines within water supply networks has been shown as a viable option ...
-
Usages of free-flow hydraulic turbines and boosting their energy efficiency
The article analyses engineering solutions of free-flow hydraulic turbines and ways of making them more energy efficient through application of the hydrodynamic effect of boosting the flow power. Keywords: energy; energy efficiency; capacity; power; turbine; free-flow; flow; water wheel; depth; hydrodynamic; effect; feedback; hydraulic jump MAIN PART INTRODUCTION The issue of using energy ...
-
How big is the distributed energy opportunity for water and wastewater utilities?
Energy costs for water utilities are large, and growing Energy is a significant cost for many water utilities, and costs are growing as more energy-intensive forms of water supply, including desalination, are being used. Energy is typically the second-largest utility budget item in developed countries, after labour. In many developing countries, energy can account for 70% or even more, of annual ...
-
Water sustainability decision-making for electric utilities case study
The electric power generation sector uses approximately 41% of all freshwater withdrawn in the United States—more than any other water use sector. The Electric Power Research Institute (EPRI) conducts research and development to help address challenges in electricity generation, delivery, and use, including water sustainability issues. On behalf of EPRI, LimnoTech conducted research and is ...
-
What rural Alaska can teach the world about renewable energy
I flew into Unalakleet, Alaska, on a late fall day. With about 700 people, Unalakleet is large by rural Alaska standards and serves as a regional hub. The village is located on a sandy spit of land where a clear river meets the turbid water of the Bering Sea. Out the plane window the sun shone bright, glittering off the wind-tossed whitecaps of the sea. To the east, the rolling Nulato Hills, clad ...
By Ensia
Need help finding the right suppliers? Try XPRT Sourcing. Let the XPRTs do the work for you