ME 40
Thermodynamics
Spring 2009
Quiz #2
February 23, 2009
Name:
SID:
Instructions:
Read each question carefully. Take into consideration the point values for each question. Write
your name and SID on each page. You have roughly 45 minutes.
One double-sid
FINAL EXAMINATION FROM 2000
ME 40 FALL 2009 PRACTICE FINAL: REMEMBER, THIS EXAM IS MORE
DIFFICULT THAN YOUR FINAL WILL BE. DONT PANIC.
NAME_
This examination is open book and open notes. The test consists of four problems
equally graded. Please write your
Review Problems, Chapter 1, Issued September 3rd, 2014
Problems 16, 17, 18, 53, 67, 103, 106, 114, 124, 125 from the 7th Edition of Cengel and Boles,
Thermodynamics.
Problem 16: The gas tank of a car is filled with a nozzle that discharges gasoline at a c
Review Problems, Chapter 4, Issued September 26th, 2014
Problems 24, 37, 66, 69, 93, 116, 125, 142, 149, 150, 195 from the 7th Edition of Cengel and
Boles, Thermodynamics.
Problem 5-24
Air flows steadily in a pipe at 300 kPa, 77C, and 25 m/s at a rate of
function [P_final] = hw1partc2
Ru = 8.31447;
molarmass = 2*1.00794;
R = Ru/molarmass;
V1 = 0.5;
T1 = 20+273;
P1 = 400;
%mass of hydrogen in left tank
m1 = (P1*V1)/(R*T1);
V2 = 0.5;
T2 = 50+273;
P2 = 150;
%mass of hydrogen in right tank
m2 = (P2*V2)/(R*T2)
ME 40
Midterm 1
March 2, 2016
Instructions: Closed Book; Answer all questions; Write clearly and in an organized manner.
Use SI units throughout.
Ru = 8.314 kJ/kmolK = 0.08314 barm3/kmolK
1 kJ/kg = 1000 m2/s2
1 kJ = 1 kPa m3
1 kW = 1 kJ/s
Student Name
Stu
ME40 (Thermodynamics 2015)
HW 13 (Due Wednesday 11/18/15 @ 3PM)
PROBLEM 1 (Chapter 13)
A gas mixture consists of 5 kmol of H2 and 4 kmol of N2. Determine the mass of each gas
and the apparent gas constant of the mixture. (ANSWERS: 10 kg, 112 kg, 0.613 kJ/
ME40 (Thermodynamics)
Fall 2015
HW4 (Due Wednesday 9/23/2015, 3:00 pm)
PROBLEM 1
4-126
A mass of 5 kg of a saturated liquid-vapor mixture is contained in a piston-cylinder device at 120.90
kPa. Initially, 2 kg of water is in the liquid phase and the rest
UCB, Fall 2016
M. Frenklach
Page 1 of 9
Homework Problem Set 4 Solutions
PART B
1)
Steam flows steadily through an adiabatic turbine. The inlet conditions of the steam are 6 MPa, 400 C,
and 80 m/s, and the exit conditions are 40 kPa, 92 percent quality, a
UCB, Fall 2016
M. Frenklach
Page 1 of 7
Homework Problem Set 5 Solutions
Part A
Matlab function mix.m solves the energy balance (1st Law) for an open system at steady state, with
negligible changes in kinetic and potential energy and no work interactions.
University of California, Berkeley
Department of Mechanical Engineering
PROBLEM SET 8 (DUE THURSDAY, NOVEMBER 10TH AT 11:59 P.M.)
REPORTING
Report your results by providing:
Submit a .zip folder containing requested MATLAB files to bCourses. Please use th
University of California, Berkeley
Department of Mechanical Engineering
PROBLEM SET 9 (DUE MONDAY, NOVEMBER 21ST AT 11:59PM)
REPORTING
A .zip folder containing your MATLAB function refricyc.m as well as all other
requested MATLAB files. Please use the exa
UCB, Fall 2016
M. Frenklach
Page 1 of 5
Part B
The results are plotted below.
As seen in the plot, the thermal efficiency exhibits diminishing gains with increased split and
compression ratios. It is therefore the responsibility of the engineer to optimiz
ME 40 Thermodynamics Spring 2017
Homework 7
Due: Friday March 24th, 2017 at 1 pm
In class or in the HW box in Etch
1. Consider a Carnot cycle executed in a closed system with
0.6 kg of air. The temperature limits of the cycle are 300 K
and 1100 K, and t
UCB, Fall 2016
M. Frenklach
Page 1 of 8
PART A
A function was written to perform the thermodynamic analysis of the Rankine cycle with the
modifications outlined in the problem statement.
(a) Ideal Rankine cycle:
The thermodynamic efficiency for this cycle
THERMODYNAMICS: Part 2
2ND LAW OF
THERMODYNAMICS:
ENTROPY
ME 40 Thermodynamics, Miguel Sierra Aznar
20
7/11/2016
Lecture 11 Outline
1.
2.
3.
4.
5.
Reversible and Irreversible Processes
Internally and Externally Reversible
The Carnot Cycle Revisited!
Entro
THERMODYNAMICS: Part 2
2ND LAW OF
THERMODYNAMICS
ME 40 Thermodynamics, Miguel Sierra Aznar
1
7/11/2016
Course Structure
2nd Law
Advanced
Thermo
1st Law
Basics
Thermo
ME 40 Thermodynamics, Miguel Sierra Aznar
10 Lectures left to reach the end!
2
7/11/2016
Lecture 8
VAPOR CYCLES
continued
ME 40 Thermodynamics, Miguel Sierra Aznar
214
7/4/2016
Lecture 8 Outline
0. Previously in Thermodynamics!
1. Analysis of Vapor Power Cycles
2. The Rankine Cycle
1. Reheating
2. Supercritical Cycle
3. Regeneration
3. Combin
Lecture 4
THERMODYNAMIC ANALYSIS
OF CLOSED AND OPEN
SYSTEMS
ME 40 Thermodynamics, Miguel Sierra Aznar
109
6/17/2016
Lecture 4 Outline
0.
1.
2.
3.
4.
Previously in Thermodynamics!
Specific Heatcontinued
Closed System analysis
Example Closed System Analysis
Name: _
Student id: _
Final Exam, ME40
08/11/2016
Instructions:
Read every exercise carefully to understand what is being asked. Do not forget to give an answer to
everything that is being asked.
Fill your answers (results, calculations and argumentation)
EQUATION SHEET ME 40 SUMMER 2016
STATE PROPERTIES
P Pa Pressure
T K Temperature
NOMENCLATURE & DEFINITIONS
c
P
R
m massofliquid(orfuel)
r
R
P
c
M
m masofvapor
T
1
V
V ,
x vapor quality
T
r
x molar fraction
V
d
y mass fraction
Pdv
w
0
Steady
dt
M molecula
Name:_
Student id: _
MIDTERM 1, ME 40
07/06/2016
Note: Read every exercise carefully to understand what is being asked. Do not forget to give an
answer to everything that is being asked.
Problem 1 (30/100 points)
1. (2 points) What are the 3 possible ways
EQUATION SHEET ME 40 SUMMER 2016
NOMENCLATURE & DEFINITIONS
P2
Vc + Vd
Ru
rp =
r=
mf mass of liquid (or fuel)
R=
P1
Vc
M
mg mas of vapor
2
TL
x vapor quality
wb = Pdv
th,carnot = 1
TH
1
2
xi molar fraction
d
w
=
vdP
yi mass fraction
rev,open
Steady = 0
1