Steam turbines, maximum amount of work done?

In summary, the maximum amount of work that a steam turbine can do is proportional to the heat input, with a coefficient of 0.6. This maximum is achieved when the turbine is operated with an input temperature of 800C and an exhaust temperature of 150C. The value of Q does not need to be specified in the answer.
  • #1
pp84
4
0
Steam turbines, maximum amount of work done?

Hi, having a little trouble with this problem, not entierly sure what formula to use, or what value to use for Q.

A steam turbine is operated ith an input temp of 800C and exhaust temp of 150C. What is the maximum amount of work the turbine can do for a given heat input Q? Under what conditions is the maximum achieved?

Thanks in advance
 
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  • #2
have you tried thinking of the thing as a carnot engine?
 
  • #3
yeh i have but that would just give me an answer with two undefined variables.

0.6Q=W

in the question it says 'for a given heat input Q' what does that mean exactly, could it mean pick a random value.

Thanks for your reply
 
  • #4
it means just leave Q in your answer. you've already got it
 

1. What is a steam turbine?

A steam turbine is a device that converts the energy from high-pressure steam into mechanical work. It is commonly used in power plants to generate electricity.

2. How does a steam turbine work?

Steam turbines work on the principle of thermodynamics, where steam is expanded through a series of stages, causing the rotor blades to rotate and generate mechanical energy.

3. What is the maximum amount of work that can be done by a steam turbine?

The maximum amount of work that can be done by a steam turbine is determined by the steam flow rate, the pressure and temperature of the steam, and the efficiency of the turbine. It is typically measured in megawatts (MW).

4. What factors affect the maximum amount of work that can be done by a steam turbine?

The maximum amount of work that can be done by a steam turbine is affected by the steam flow rate, the pressure and temperature of the steam, the efficiency of the turbine, and the size and design of the turbine blades.

5. How is the efficiency of a steam turbine determined?

The efficiency of a steam turbine is determined by the amount of energy converted into mechanical work compared to the amount of energy supplied to the turbine. This is typically expressed as a percentage and can be affected by factors such as steam quality, blade design, and maintenance of the turbine.

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