- #1
bpw91284
- 67
- 0
Homework Statement
Suppose a power plant delivers energy at 9.7E2 MW using steam turbines. The steam goes into the turbines superheated at 665 K and deposits its unused heat in river water at 298 K. Assume that the turbine operates as an ideal Carnot engine.
a. If the river flow rate is 37 m3/s, estimate the average temperature increase of the river water immediately downstream from the power plant.
b. What is the entropy increase per kilogram of the downstream river water in J/kg·K?
Homework Equations
http://www.physics.iastate.edu/getfile.php?FileID=3135
http://www.physics.iastate.edu/getfile.php?FileID=3170
The Attempt at a Solution
I solved for efficiency using e=1-T_L/T_H
Then used e=W/Q_H to get Q_H in watts
I could find Q_L with Q_H=Q_L+W but don't know where to go from there.
Maybe convert the volumetric flow rate to mass flowrate using density and then somehow use Q=mc(delta T)??
Last edited by a moderator: