What is meant by Kaplan turbine?
The Kaplan turbine is a propeller-type water turbine which has adjustable blades. It was developed in 1913 by Austrian professor Viktor Kaplan, who combined automatically adjusted propeller blades with automatically adjusted wicket gates to achieve efficiency over a wide range of flow and water level.
What is a bulb turbine?
The bulb turbine is a reaction turbine of Kaplan type which is used for extremely low heads. The runner of a bulb turbine may have different numbers of blades depending on the head and water flow. The bulb turbines have higher full-load efficiency and higher flow capacity as compared to Kaplan turbine.
What is a water turbine for kids?
It is usually made with dams that block a river to make a reservoir or collect water that is pumped there. When the water is “let go”, the huge pressure behind the dam forces the water down pipes that lead to a turbine. This causes the turbine to turn, which turns a generator which makes electricity.
How does a Kaplan turbine work?
Kaplan Turbine works on the principle of axial flow reaction. In axial flow turbines, the water flows through the runner along the direction parallel to the axis of rotation of the runner. It is capable of working at low head and high flow rates very efficiently which is impossible with Francis turbine.
What is impulse turbine with example?
Impulse Turbine: If at the inlet of the turbine, the energy available is only kinetic energy, the turbine is known as impulse turbine. Example: Pelton wheel turbine.
What is specific speed of turbine?
The specific speed value for a turbine is the speed of a geometrically similar turbine which would produce unit power (one kilowatt) under unit head (one meter). The specific speed of a turbine is given by the manufacturer (along with other ratings) and will always refer to the point of maximum efficiency.
Which turbine is used for low head?
Hydropower Turbines
| Hydropower Turbine Type | Typical Site Characteristics |
|---|---|
| Archimedean Screw | Low heads (1.5 – 5 metres)Medium to high flows (1 to 20 m3/s).For higher flows multiple screws are used. |
| Crossflow turbine | Low to medium heads (2 – 40 metres) Low to medium flows (0.1 – 5 m3/s) |
What is hydropower simple words?
The definition of hydropower is hydroelectric power, which is electricity produced by water. An example of hydropower is the electricity produced by a water channel turbine.
What are examples of hydropower?
The most common type of hydroelectric power plant is an impoundment facility. An impoundment facility, typically a large hydropower system, uses a dam to store river water in a reservoir. Water released from the reservoir flows through a turbine, spinning it, which in turn activates a generator to produce electricity.
Why are Straflo turbines used in hydroelectric power plants?
The Straflo turbine is a compact propeller turbine with a generator built into the rim of the turbine runner. Thanks to this design, Straflo turbines allow the unit to operate in low-head conditions while keeping most of the generator components out of the water.
What are the problems with the Straflo turbine seal?
The Straflo turbine seal consists of an elastomer and a counter face made of SiC ceramics. The main problem with the outer rim of the Straflo turbine seals is its short lifetime with sandy water. The centrifugal force presses the sand into the region of the seal where it causes heavy wear.
What is the shape of a cross flow turbine?
The cross-flow turbine also called an Ossberger turbine, has a shape of a drum. Its structure is similar to that of a water wheel. When the water enters the turbine at the edge, it moves inward. Then it flows through the runner and exits from the inside back out.
What is the kids definition of a turbine?
Kids Definition of turbine. : an engine whose central driving shaft is fitted with a series of winglike parts that are spun by the pressure of water, steam, or gas.