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MCHE-321| Thermodynamics I
Chapter 5 Entropy
Extra Problem
Water initially a saturated liquid at 100 is contained within a pistoncylinder
assembly. The water undergoes a process to the corresponding saturated vapor
state, during which the piston moves fre

758 An adiabatic pump is to be used to compress saturated liquid water
at 10 kPa to a pressure to 15 MPa in a reversible manner. Determine the
work input using (a) entropy data from the compressed liquid table, (b)
inlet specific volume and pressure value

1
Dr. M. Kanaan
Beirut Arab University
Department of Mechanical Engineering
MCHE-321 | Thermodynamics I
Review Problems
Problem 1
Steam enters an adiabatic turbine steadily at 7 MPa, 500C,
and 45 m/s, and leaves at 100 kPa and 75 m/s. If the power
output

1
Fall 2015-2016 Dr. M. Kanaan
Beirut Arab University
Department of Mechanical Engineering
MCHE 321 Thermodynamics I
Assignment#5
This assignment is due on Monday, November 30, 2015
Conceptual questions
1. Does a cycle for which > 0 violate the Clausius i

1
Fall 2015-2016 Dr. M. Kanaan
Beirut Arab University
Department of Mechanical Engineering
MCHE 321 Thermodynamics I
Assignment#4
This assignment is due on Monday, November 9, 2015
Problem 1
Consider a building whose annual air-conditioning load is estima

MCHE 321
Thermodynamics I
Chapter 4 The Second Law of Thermodynamics
Beirut Arab University
Dr. Mohamad Kanaan
2
Introduction to the second law of
thermodynamics
Energy is a conserved property, and no process is known to
have taken place in violation of

MCHE 321
Thermodynamics I
Chapter 5 Entropy
Beirut Arab University
Dr. Mohamad Kanaan
Clausius Inequality
The Clausius inequality states that for any thermodynamic
cycle
0
That is, the cyclic integral of Q T is always less than or
equal to zero.
This i

MCHE 321
Thermodynamics I
Chapter 6 Simple Gas Power Cycles
Beirut Arab University
Dr. Mohamad Kanaan
2
Basic Considerations in The Analysis of Power
Cycles
Most power-producing devices operate on
cycles, and the study of cycles is quite
important in The

MCHE 321
Thermodynamics I
Chapter 7 Basic Refrigeration Cycles
Beirut Arab University
Dr. Mohamad Kanaan
2
Refrigerators and Heat Pumps
The transfer of heat from a low-temperature region to a
high-temperature one requires special devices called
refrigera

1
MCHE-321 | Dr. M. Kanaan
General equation of entropy balance
+ + = ( )
For adiabatic systems:
=0
For reversible processes: = 0
For open systems, steady-state: = 0
For closed systems: = 0 and = = (2 1 )
Water/steam R134a
Air/ideal Gas
Entropy change = 2

Beirut Arab University
Faculty of Engineering
MCHE 321
Gas Power Cycles | Extra Problem
An air-standard Diesel cycle has a compression ratio of 16 and a cutoff ratio of 2. At
the beginning of the compression process, air is at 95 kPa and 27C. Accounting f