Governing system or governor is the main controller of the hydraulic turbine. The governor varies the water flow through the turbine to control its speed or power output . Generating units speed and system frequency may be adjusted by the governor.
What is the purpose of governing in steam turbine Mcq?
The main purpose of the steam turbine governing is to control the flow rate of steam in the turbine . It also helps in regulating the load that is developed.
What is the function of governor in turbine?
A steam turbine governor is a component of the turbine control system that regulates rotational speed in response to changing load conditions . The governor output signal manipulates the position of a steam inlet valve or nozzles which in turn regulates the steam flow to the turbine.
What is the significance of governing of impulse turbine?
A method of maintaining the speed of the turbine is constant irrespective of variation of the load on the turbine known as governing of turbine. The governors regulate the rate of flow to the turbine in such a way that the speed of the turbine is maintained constant as far as possible under varying load conditions.
What is governing of reaction turbine?
Governing of Reaction Turbines Governing of reaction turbines is usually done by altering the position of the guide vanes and thus controlling the flow rate by changing the gate openings to the runner.
What is the main function of turbine?
Briefly, the purpose of a turbine is to convert the available energy into the fluid that enters it to generate electrical energy . In its conception, the turbine expands the fluid that enters it, decreasing its pressure – or even, decreasing its internal energy2.
What is the main function of a governor?
The primary function of the governor is to preserve, protect and defend the constitution and the law as incorporated in their oath of office under Article 159 of the Indian constitution in the administration of the State affairs.
Which principle is used in hydraulic turbine?
The principle of a hydraulic turbine is based on Newton’s second law of motion . It states that the force is directly proportional to the change in momentum. If there is any change in the momentum of the water, then a force is generated as a result.
Which turbine has highest speed?
The specific speed of Kaplan turbine ranges from 600 to 1000 rpm. It is a low head axial flow turbine. From the table, we can conclude that the Kaplan turbine has the highest specific speed.
Which of the following is an example of impulse turbine?
Example: Pelton wheel turbine . Pelton Wheel Turbine: It is a tangential flow impulse turbine in which the pressure energy of water is converted into kinetic energy to form a high-speed water jet and this jet strikes the wheel tangentially to make it rotate.
Why it is called impulse turbine?
Unlike other types of turbines which are reaction turbines, the Pelton turbine is known as an impulse turbine. This simply means that instead of moving as a result of a reaction force, water creates some impulse on the turbine to get it to move .
What is the principle of impulse turbine?
Working Principle of Impulse Turbine
In these turbines, the static pressure inside the runner is constant, and the turbine runner is at atmospheric pressure . The runner spins in the air, and the fluid is sprayed to the blades through the nozzle to exchange energy with the turbine.
Where is impulse turbine used?
Applications. It is used worldwide to produce electrical energy in a number of hydro-power plants . Turbochargers in automobiles uses the pressure energy of exhaust gases through impulse turbine. Where hot and pressurized gases coming out of exhaust are converted into high velocity jet by passing them through nozzle.
What is difference between impulse and reaction turbine?
The main difference between the impulse turbine and the reaction turbine is that, in the former, there is a pressure drop across the fixed blades only , whereas in the latter, there is a pressure drop across both the fixed and the moving blades.
How many types of reaction turbines are there?
Reaction based turbines include three subtypes : Francis turbine, propeller turbine (bulb turbine, Straflo turbine, Kaplan turbine types), and kinetic turbine.
Which is the impulse turbine?
An impulse turbine is comprised of a stage of stationary nozzles followed by a stage of moving blades . In this turbine, the potential energy of steam is converted into kinetic energy in nozzles.
