MECH 3020 Thermodynamics II: Homework Assignment # 15
1. (Due Monday) Calculate the reversible work, per unit mass of fuel, that can be derived from the
following fuels via a reversible oxidation process at 298 K: hydrogen gas, methane, carbon monoxide,
a
MECH 3020 Thermodynamics II: Exam I review
General Information
Exam resources: property tables in book and four pages (front and back) of your own notes.
There will be three problems on the exam. All three will involve cycle analysis (similar to the hom
MECH 3020 Thermodynamics II: Exam II review
General Information
The exam will be closed book except for the property tables. You may bring 4 pages (front and back)
of reference notes/formulas, which must be in your own handwriting. You may also bring cop
MECH 3020 Thermodynamics II: 01/12/11
Homework: Due 1/17
The net work is
wnet = w12 + 23 + w34 + w41
w
It is critically important that the signs are correct on all of the process works. You should
check that the net work equals the net heat:
1. An airstan
MECH 3020 Thermodynamics II Spring 2011: Homework set #2
2 60 40
2.65 103 702
= 2584 rev/min
1. (Due 1/22) A spark ignition engine has a displacement
of VD = 2 L and a compression ratio of r = 9. The
conditions of the air in the cylinder at the bottom of
MECH 3020 Thermodynamics II Spring 2011: Homework set #2
5. Say a 4stroke Diesel engine, with r = 18, qH = 1500
kJ/kg, and VD = 12 L, is operating at 1200 RPM.
The net work per unit mass for the Diesel cycle alone is
wd = qH qL = qH CV (T4 T1 ) = 910.2 kJ
MECH 3020 Thermodynamics II: Homework set
#3, Due 1/31
1. A simple gas turbine cycle has inlet conditions of 300 K
and 1 atm. The pressure ratio is rP = P2 /P1 = 8, and
the heat addition, per unit mass, is qH = 1200 kJ/kg.
Both the turbine and the compres
MECH 3020 Thermodynamics II: Homework set #8, Due 2/25
1. A simple vapor refrigeration cycle uses R-134a. The evaporator is maintained at a temperature of -10 C,
and the minimum temperature in the condenser is 2 C above the ambient temperature. Assuming t
MECH 3020 Thermodynamics II
Homework Set #9
So
nHe = n2 nN2 = 0.221 kmol, mHe = 0.2214 = 0.882 kg
1. A gas mixture consists of 2 parts CO2 , 2 parts Ne, to 1
part H2 on a mass basis. Compute the mole fractions
of the components and the mixture molecular m
Department of Mechanical Engineering
MECH 3050
Fall 2005
Auburn University
MECH 3020 Quiz VIII
35 minutes
Open Book Only
Name:
Ma
c.Sema v%V.n
ef
Reactions
1.) Consider the combustion of n-octane (C 8 H 18) in 200% theoretical air. The stoichiometri
Department of Mechanical Engineering
Auburn University
MECH 3020
Fall 2005
c.\-EQ2L.1<e
MECH 3020 Quiz IV
30 minutes
Open Book
Name:
A diesel engine has a compression ratio of 20:1 with an inlet of 95 kPa, 290 K, state 1, with
volume 0.5 L. The maximum
MECH 3020
Fall 2005
Department of Mechanical Engineering
Auburn University
MECH 3020 Quiz V
30 minutes
Open Book Only
Name:
Consider an ideal Stirling-cycle engine in which the state at the beginning of the isothermal
compression process is 100 kPa, 25C
MECH 3050
Fall 2005
Department of Mechanical Engineering
Auburn University
MECH 3020 Quiz VII
35 minutes
Open Book Only
Name:
A, f
Gas Mixtures
1.) A tertiary gas mixture is comprised of 23% nitrogen, 25% carbon dioxide and 52% oxygen on a
mass basis. Usi
VC NZ_
Gt
C
Li
MECH 3020 Thermodynamics H
a
c.
Co a
SILO'
I Ok
Midterm Exam
o. 6e.
O. -139
Fall 2003
Please read the questions carefully and choose the best answer. Circle your answers clearly or wile you
answer for questions 7 through 10. You have 50 min
1
State 1:
T = 500 C
P=?
non ideal
turbine
P1'
T
T1 = 500 C
w
P1
initial
guess
revised
estimate
s
State 2:
P = 50 kPa
saturated vapor
P2 = 50 kPa
FIG. 1: Non ideal turbine problem.
2s'
2a'
2a
s
s
Nonideal turbine with an
unknown inlet state
FIG. 2: Iterat
-
MECH 3020 Thermodynamics II
Fall 2005
Midterm Exam II
4%-1
Please read the questions carefully and choose the best answer. Circle your answers clearly. The exam
format is multiple-choice where you have 50 minutes to complete the exam. Please do your
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