Podcast
Questions and Answers
In an impulse steam turbine, what produces the force to rotate the blades?
In an impulse steam turbine, what produces the force to rotate the blades?
- Steam velocity acting on the blades (correct)
- Expansion of the steam
- Increase in pressure of the steam
- Change in momentum of the blades
What causes the steam to expand and increase in velocity in a steam turbine?
What causes the steam to expand and increase in velocity in a steam turbine?
- First-stage nozzle (correct)
- Shaft glands
- Revolving blades
- Throttle valve
What is used to reverse the flow of steam between each pair of revolving blades in a steam turbine?
What is used to reverse the flow of steam between each pair of revolving blades in a steam turbine?
- Steam seals
- Thrust bearings
- Labyrinth packing seals
- Stator blades (correct)
What part of an impulse steam turbine prevents the higher pressure of one stage from leaking through to the next stage?
What part of an impulse steam turbine prevents the higher pressure of one stage from leaking through to the next stage?
What part is used in large impulse steam turbines to maintain a constant speed?
What part is used in large impulse steam turbines to maintain a constant speed?
What type of bearings maintain the vertical position of the rotor in an impulse steam turbine?
What type of bearings maintain the vertical position of the rotor in an impulse steam turbine?
What occurs if radial or thrust bearings exceed the specified tolerance in an impulse steam turbine?
What occurs if radial or thrust bearings exceed the specified tolerance in an impulse steam turbine?
What do reaction turbines develop torque by reacting to?
What do reaction turbines develop torque by reacting to?
What is the primary function of a steam turbine?
What is the primary function of a steam turbine?
Which of the following are the three types of steam turbines commonly used?
Which of the following are the three types of steam turbines commonly used?
What is the primary function of impulse turbines?
What is the primary function of impulse turbines?
What is the working principle of an impulse steam turbine?
What is the working principle of an impulse steam turbine?
What determines the amount of work performed by steam turbines?
What determines the amount of work performed by steam turbines?
Which type of steam turbines are designed for specific plant requirements?
Which type of steam turbines are designed for specific plant requirements?
What happens to the pressure of steam during expansion in an impulse steam turbine?
What happens to the pressure of steam during expansion in an impulse steam turbine?
In a reaction steam turbine, what causes the backward movement of the arms?
In a reaction steam turbine, what causes the backward movement of the arms?
What is the function of fixed blades in a reaction steam turbine?
What is the function of fixed blades in a reaction steam turbine?
How does the velocity of steam change in the nozzle-shaped passages of a reaction steam turbine?
How does the velocity of steam change in the nozzle-shaped passages of a reaction steam turbine?
What causes a reactive force on the revolving blades in a reaction steam turbine?
What causes a reactive force on the revolving blades in a reaction steam turbine?
What distinguishes a reaction steam turbine from an impulse steam turbine in terms of admission of steam?
What distinguishes a reaction steam turbine from an impulse steam turbine in terms of admission of steam?
What physical characteristic results from the difference in pressure between stages in a reaction steam turbine?
What physical characteristic results from the difference in pressure between stages in a reaction steam turbine?
What part of a reaction steam turbine serves the same function as in an impulse steam turbine?
What part of a reaction steam turbine serves the same function as in an impulse steam turbine?
What is used in a reaction steam turbine to reduce leakage between stages and warn of excessive radial tolerance?
What is used in a reaction steam turbine to reduce leakage between stages and warn of excessive radial tolerance?
What is the thermal efficiency of the steam turbine in problem 1?
What is the thermal efficiency of the steam turbine in problem 1?
What is the total thermal efficiency of the power plant in problem 1?
What is the total thermal efficiency of the power plant in problem 1?
In problem 2, what is the thermal efficiency of the gas turbine plant?
In problem 2, what is the thermal efficiency of the gas turbine plant?
What is the electric efficiency of the gas turbine plant in problem 2?
What is the electric efficiency of the gas turbine plant in problem 2?
What is the value in dollars of the energy wasted in one day in the Chimney considering the price of each kW.Hr is $0.11 for the first scenario?
What is the value in dollars of the energy wasted in one day in the Chimney considering the price of each kW.Hr is $0.11 for the first scenario?
What is the power (in kW) wasted in the condenser for the first scenario?
What is the power (in kW) wasted in the condenser for the first scenario?
What is the percentage of power wasted in respect to the input power for the first scenario?
What is the percentage of power wasted in respect to the input power for the first scenario?
What is the power input (in kW) to the boiler considering boiler thermal efficiency of 85% for the first scenario?
What is the power input (in kW) to the boiler considering boiler thermal efficiency of 85% for the first scenario?
In a reaction steam turbine, what is the purpose of the balance piston or dummy piston?
In a reaction steam turbine, what is the purpose of the balance piston or dummy piston?
What is the main cause of steam leakage around the tops of the revolving blades and under the bottoms of the fixed blades in a reaction steam turbine?
What is the main cause of steam leakage around the tops of the revolving blades and under the bottoms of the fixed blades in a reaction steam turbine?
Which process in the ideal Rankine cycle involves adiabatic reversible expansion through the turbine?
Which process in the ideal Rankine cycle involves adiabatic reversible expansion through the turbine?
What does the section 4-B represent in the steam generator of an ideal Rankine cycle?
What does the section 4-B represent in the steam generator of an ideal Rankine cycle?
What does the thermal efficiency of a turbine represent?
What does the thermal efficiency of a turbine represent?
What is electric efficiency in a turbine system defined as?
What is electric efficiency in a turbine system defined as?
In a Rankine cycle power plant, what is the value of dollar energy wasted in one day in the condenser, considering the price of each kW.Hr is $0.11?
In a Rankine cycle power plant, what is the value of dollar energy wasted in one day in the condenser, considering the price of each kW.Hr is $0.11?
In a gas turbine power plant running on natural gas, how is thermal efficiency calculated?
In a gas turbine power plant running on natural gas, how is thermal efficiency calculated?
