A Rankine heat engine has |WS,turbine| = 1000 kJ/s, |QC| = 2000 kJ/s, and |WS,pump| = 13 kJ/s. What is the efficiency of this heat engine?

A. 0.97
B. 0.03
C. 0.33
D. 0.67
E. Insufficient information to solve.


A. Incorrect. You are probably mixing up your signs in the energy balance. Review the direction of the heat flows in a Rankine engine and your signs.
B. Incorrect. You are probably making sign errors. Review the direction of the heat flows in a Rankine engine and your signs.
C. Correct. Performing the energy balance to find QH, you can then obtain the efficiency (?).
D. Incorrect. You are making a calculation error.
E. Incorrect. You must do an energy balance before applying the definition of efficiency to solve this one.

Trades & Technology

You might also like to view...

If the compression ratio of a system with a reciprocating compressor decreases, the amount of refrigerant pumped by the compressor ____.

A. will increase B. will decrease C. will remain the same D. cannot be determined

Trades & Technology

Convert 98.65 cm^2 to in^2

What will be an ideal response?

Trades & Technology

Can you sometimes use a screwdriver as a chisel and pound it with a hammer?

What will be an ideal response?

Trades & Technology

Gridlines are used to _____

A) make it easy to refer to specific locations on a plan B) show changes in topography within a building structure C) indicate that an object has been broken off D) indicate land boundaries on a site plan

Trades & Technology