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MindTap Engineering for Dunlap's Sustainable Energy, SI Edition, 2nd Edition [Instant Access], 1 term (6 months)
2nd Edition
ISBN: 9781337551755
Author: DUNLAP
Publisher: Cengage Learning US
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Question
Chapter 1, Problem 13P
To determine
Find the Carnot efficiency of the steam turbine.
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Civil Engineering
In a steam turbine, steam with the mass flow rate of 201 kg/s enters the turbine al the lemperature
of 601°C and the pressure of 16 MPg and exits at the lemperature of 31°C and the quality of 96%
Determine the power production in the turbine (in kW), The change in kinetic and potential energies
are negligible and the process is steady slate and adlabalic. List all your assumptions
Figure 2 shows an assembly made of a steel tube of internal and external diameter of 20 mm and 30 mm respectively, brass and copper bars, each having 25 mm of diameter. The three materials have equal length of 500 mm and are symmetrically rigidly fixed at the upper end while being joined by a horizontal collar (with negligible mass) at their bottom end. An application of a vertical downward load P on the assembly, results in storing a total of 20 J of energy.
The moduli of elasticity for steel, brass and copper materials are ESt=200 GPa, EBr=100 GPa and ECu=80 GPa, respectively.
Calculate
1. The load P if it is applied gradually.2. The load P if it is applied suddenly.3. The impact load P that falls from a height of 200 mm above the collar.
Prob-3 A cyclic machine, shown in Fig. below receives 300 kJ from a 1000 K energy reservoir. It rejects 125 kJ to a 400 K
energy reservoir and the cycle produces 200 kJ of work as output. Is this cycle reversible, irreversible, or impossible?
TH= 1000 K
HE
Q..=300 kJ
H
W 200 kJ
=
19₂² 125 kJ
TL=400 K
Chapter 1 Solutions
MindTap Engineering for Dunlap's Sustainable Energy, SI Edition, 2nd Edition [Instant Access], 1 term (6 months)
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