Turbines Skip to main content

Turbines

Turbines

Turbines are Hydraulic Machine which converts Mechanical Energy to Electric Energy. This is done by Water power supplied to the runner by water jets.
Turbines work on the principle of momentum in which the water gives the moment and that helps in moving the shaft for the generation of power.

Turbines are divided into 2 types of Reaction and Impulse Turbine.
Pelton Turbine or Pelton wheel is an impulse turbine in which only kinetic energy is available to start rotating the turbine runner.
The other turbines are Kaplan and Francis which are reaction turbines in which water has not only the kinetic energy but also has pressure energy and thus they can work in a low head situation.

Pelton Turbine requires high head such as more than 40 m. Francis runs at medium heat about 15-40 m whereas Kaplan runs at a low head less than 15 m
The different types of turbines
Different Types of Turbines
Pelton Turbine is the Tangential flow Turbine whereas Francis is a Radial inward flow Turbine and Kaplan is an Axial flow Turbine.

 Pelton Turbine is a low discharging turbine with less specific speed. The Francis turbine has a medium discharge and medium speed as compared to both and Kaplan has high discharge capacity and high specific speed.

Pelton wheel has an open casing and the runners are not submerged in water and the Tail Race is below the Turbine. In the case of Kaplan and Francis, the Turbine runner blades are submerged fully while working due to close casing.
Different types of turbines and its details
Types of Turbines
Pelton wheel Turbine has an open casing and thus runs under atmospheric pressure. The Kaplan and Francis Turbine have close casing and thus require and arrangement to discharge water out. This arrangement is called the Draft Tube.

Comments

Popular posts from this blog

Great Man-Made River (GMR)

Libya's Great Man Made River: The Great Man-Made River in Libya is one of the most ambitious Civil Engineering Project in history of mankind.  In the year 1953, the Libya Government found out not only vast oil reserves but also vast quantity of fresh water locked under the strata, most of the water was trapped around 7000-30000 years ago which is divided in 4 different basins. The first basin is named Kufra basin which is neat Egypt Border which covers almost 35000 sq kilometer which is quite deep around 2000 m deep. The other basin is in Sirte Basin which cover 10000 sq kilometer, third in Murzuk Basin and the last in Jabal Fezzan Basin covering 4800 sq kilometers area.  The GMR project will be used to transfer water to North of the country to provide water for irrigation purpose for more than 6 million  people. This will be a changing point  for Libya and the Colonel Muammar Gaddafi called it the Eighth Wonder of World. The work started in 1984 of the project and estimated to be

Timber Buildings !?

 Why do we need a timber building? Yes, timber buildings. As on earth human population is on an exponential rise, many and many people are trying to get home in a city where they have easy excess for the workplace for their own living. In the near future, as the population gets more concentrated in cities more and more structures I mean Tall Structures need to be built. Loading Bearing and Comparison So now architects and builders have opted for the old Technic of using timber as a building material eliminating concrete and steel. Yes, it is very hard to find this amount of trees but not impossible. It can be grown and regrown as needed. Many projects have been in progress of this idea and it reduces about 75% of carbon emission as compared to concrete and steel structure. Using timber coming directly from the forest doesn't have the appropriate strength required for a high-rise building. So designers came up with the new idea of CLT i.e. Cross Laminate Tim

DDSS - Roof Truss

Design Of Roof Truss: If load from purlin, false ceiling etc are applied in between the nodes, then principal rafters or main ties are designed for combined stresses from bending and axial loads. IS 800 - 2007 provides general design procedure for the angle Purlins conforming to steel grade of Fe 410 of O, S, W  and not exceeding slope more than 30 degree based on live load of 750 N/m2. Loads on Trusses: Dead Load, Live Load, Wind Load and Snow Load are types of loads on the truss. The main in Design of Truss in small truss and some Industrial Truss. Dead Load (DL): If spacing of Truss is 4 m and pitch of truss is 1:4 then self weight of the truss is taken as, w = (l/3+6) of plan area .... in kN/m2. Then add all the dead loads with this such as GI sheet, AC sheet and Purlins weight. Then multiply with the plan area to get the actual DL. Live Load(LL): If the angle is less than 10 degree, then the LL will be directly taken as 750 N/m2. If slope of truss is more than 10 degree, live load