FUND OF ENG THERMODYN(LLF)+WILEYPLUS
9th Edition
ISBN: 9781119391777
Author: MORAN
Publisher: WILEY
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Separate streams of air and water flow through the compressor and heat exchanger arrangement shown in the figure below, where m˙1= 0.6 kg/s and T6= 50°C. Steady-state operating data are provided on the figure. Heat transfer with the surroundings can be neglected, as can all kinetic and potential energy effects. The air is modeled as an ideal gas.
Determine:(a) the total power for both compressors, in kW.(b) the mass flow rate of the water, in kg/s.
Separate streams of steam and air flow through the turbine and heat exchanger arrangement shown in the figure
below, where air enters location 5 at a rate of 1000 kg/min. The left turbine (Turbine 1) is able to produce 12,000 kW
of power.
Steady-state operating data are provided on the figure. Heat transfer with the surroundings can be neglected, as can
all kinetic and potential energy effects.
W2 = ?
Turbine
Turbine
2
P3 = 10 bar
T3 = ?
T2 = 400°C_
P2= 10 bar
T = 240°C
P4 = 1 bar
Steam
in
P1 = 20 bar
+6
T = 600°C
www
T5 = 1500 K
-5 Ps = 1.35 bar
Heat exchanger
V T = 1200 K
P6 = 1 bar
Air in
Determine:
T3, in °C.
• the mass flow rate of steam at 1, in kg/s.
• the power output of the second turbine, in kW.
• the magnitude of heat transfer between the steam and air, in kW.
• the direction of the heat transfer (i.e., to the steam or from the steam).
Determine:(a) the total power for both compressors, in kW.(b) the mass flow rate of the water, in kg/s.
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