High Efficiency Generator 5mw Water Turbine Francis
1. Brief Introduction
Francis turbines may be designed for a wide range of heads and flows. This, along with their high efficiency, has made them the most widely used turbine in the world. Francis type units cover a head range from 40 to 600 m (130 to 2,000 ft), and their connected generator output power varies from just a few kilowatts up to 800 MW. Large Francis turbines are individually designed for each site to operate with the given water supply and water head at the highest possible efficiency, typically over 90%.
In contrast to the Pelton turbine, the Francis turbine operates at its best completely filled with water at all times. The turbine and the outlet channel may be placed lower than the lake or sea level outside, reducing the tendency for cavitation.
In addition to electrical production, they may also be used for pumped storage, where a reservoir is filled by the turbine (acting as a pump) driven by the generator acting as a large electrical motor during periods of low power demand, and then reversed and used to generate power during peak demand. These pump storage reservoirs act as large energy storage sources to store "excess" electrical energy in the form of water in elevated reservoirs. This is one of a few methods that allow temporary excess electrical capacity to be stored for later utilization.
2. Product Paramenters
|100KW to 20MW
|400V, 800V, 6300V, 10500V
|Horizontal or Vertical
|Stainless Steel ZG0Cr13Ni4Mo
|Brushless or Static excitation system
|Deyang Dongsen Hydropower Equipment Co., Ltd.
A Francis turbine consists of the following main parts:
Draft tube: The draft tube is a conduit that connects the runner exit to the tail race where the water is discharged from the turbine. Its primary function is to reduce the velocity of discharged water to minimize the loss of kinetic energy at the outlet. This permits the turbine to be set above the tail water without appreciable drop of available head.
Guide and stay vanes: The primary function of the guide and stay vanes is to convert the pressure energy of the fluid into the momentum energy. It also serves to direct the flow at design angles to the runner blades.
Runner blades: Runner blades are the heart of any turbine. These are the centers where the fluid strikes and the tangential force of the impact causes the shaft of the turbine to rotate, producing torque. Close attention in design of blade angles at inlet and outlet is necessary, as these are major parameters affecting power production.
Spiral casing: The spiral casing around the runner of the turbine is known as the volute casing or scroll case. Throughout its length, it has numerous openings at regular intervals to allow the working fluid to impinge on the blades of the runner. These openings convert the pressure energy of the fluid into momentum energy just before the fluid impinges on the blades. This maintains a constant velocity despite the fact that numerous openings have been provided for the fluid to enter the blades, as the cross-sectional area of this casing decreases uniformly along the circumference.
4. Our advantages
1) We have senior engineering and technical experts, professional hydro-generator design team and installation team
2) Provide complete proposal for hydro power plant from water to wire
3) Abundant foreign power plant project implementation experience
4) Design and manufacture of hydro power generator with voltage 400V, 3.3KV, 6.3KV, or 10.5KV AC three phase
Our main products included:
(1) Kaplan turbine generators series.
(2) Turgo turbine generators series.
(3) Tubular turbine generators series.
(4) Francis turbine generators series.
(5) Pelton turbine generators series .
1) Delivery period
Normally 6 months after confirmation of orders.
We will use wooden box and plastic film to protect the products.
3) What Kind of hydroelectric generator should I choose?
Normally when you require, please let us know the details as follows, then we can provide the correct price for you.
1. Unit Capacity: ___KW
2. Water head:___M
3. Water flow:____M3/s
4. Frequency: 50HZ or 60HZ