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Carnot Engine temperature

  • Thread starter Vanessa
  • Start date
  • #1
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Homework Statement


Two heat engines operating on Carnot cycles are arranged in series. The first engine A receives heat at 927 deg C and rejects heat to a reservoir at a temperature T. The second engine B receives the heat rejected by the first engine, and in turn rejects heat to a reservoir at 27 deg C.


Homework Equations


Calculate the temperature T, in deg C, for the situation where:
a)The work outputs of the two engines are equal
b)The effeciencies of the two engines are equal


The Attempt at a Solution


I have completely lost the plot with this and really need help!

Homework Statement





Homework Equations





The Attempt at a Solution

 

Answers and Replies

  • #2
Andrew Mason
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Homework Helper
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Homework Statement


Two heat engines operating on Carnot cycles are arranged in series. The first engine A receives heat at 927 deg C and rejects heat to a reservoir at a temperature T. The second engine B receives the heat rejected by the first engine, and in turn rejects heat to a reservoir at 27 deg C.


Homework Equations


Calculate the temperature T, in deg C, for the situation where:
a)The work outputs of the two engines are equal
b)The effeciencies of the two engines are equal
What is the efficiency of a Carnot engine? Write out the efficiencies of each engine. For A, it can be expressed in terms of Th (927C) and T. For B, it is expressed in terms of T and Tc (27C).

What is the work generated in terms of the engine's efficiency? (Hint: efficiency is output / input).

AM
 

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