MECH 395
Heat Transfer
Quiz #1
NAME:_
2013
SN:_
This quiz is closed book (text and notes). You may use a calculator. Please write legibly and
show your work part marks will be given.
Heat transfer from a transistor may be enhanced by inserting it in an al
Hear Hanger QUIZ Fl 1 UDILUUD
NAME: no; u Logm SN: 3331393 L/
This quiz is closed book (text and notes). You may use a calculator. Please write leginy and
Show your work — part marks will be given.
h = 200 mezK k3 = 10 meK
Tm=50C 21-25004:
I D=0.2m
z
MECH 395
Heat Transfer
FINAL EXAM
12/10t2012
l) A sphericaltank of 3 m diameterconlainsliquefiedpetroleumgasat -60 C. Insulationwith
a
thermalconductivityof 0.06 Wm-K andthicknessof 250 r- cov"r, the outersurface.
a) Determinethe radial positionin the ins
MECH 395
Heat Transﬁr Equation Sheet 12! 1 122006
I. Modes of Heat Transfer:
Conduction Convection Radiation
F ourier’s Law Newton’s Law Black body emission Enclosed, small, gray body
q; am” a; =h(T—Tw) Eb =52: qLZ web“ 4‘2“)
2. Heat
MECH 395
1.
Equation Sheet
Modes of Heat Transfer:
Conduction
Fouriers Law
Convection
Newtons Law
qc h(T T )
qk k T
2.
1 T
q
2T
(constant k )
t
k
T
k T q
t
Gradient, f
Laplacian, , 2 f
Flat Plate
f f f
i
j k
x
y
z
2 f 2 f 2 f
x 2 y 2 z 2
f f f
i
j k
MECH 395
Heat Transﬁr FINAL EXAM 12f09z’03
DEPARTMENT OF MECHANICAL ENGINEERING
THIS EXAMINATION PAPER HAS 2 PAGES OF QUESTIONS, 1 PAGE OF PROPERTY
DATA, AND 5 PAGES OF EQUATIONS.
A CALCULATOR CAN BE USED.
MARKS FOR EACH QUESTION ARE GIVEN TN BRACKETS.
MECH 395
Heat Transfer FINAL EXAM 12’] “2006
UNIVERSITY OF VICTORIA
EXAMINATIONS DECEMBER 2006
INTRODUCTION TO HEAT AND MASS TRANSFER, MECH 395
DEPARTMENT OF MECHANICAL ENGINEERING
TO BE ANSWERED IN BOOKLETS DURATION: 3 HOURS
INSTRUCTOR: DR. A. ROWE
STUDE
MECH 395
Heat Transfer
Supplemental Exam
July 25 2007
DEPARTMENT OF MECHANICAL ENGINEERING
THIS EXAMINATION PAPER HAS 2 PAGES OF QUESTIONS, 8 PAGES OF PROPERTY
DATA AND EQUATIONS.
A CALCULATOR MAY BE USED. MARKS FOR EACH QUESTION ARE GIVEN IN
BRACKETS.
1)
MECH 395
1.
Equation Sheet
Modes of Heat Transfer:
Conduction
Fouriers Law
Convection
Newtons Law
qc h(T T )
qk k T
2.
1 T
q
2T
(constant k )
t
k
T
k T q
t
Gradient, f
Laplacian, , 2 f
Flat Plate
f f f
i
j k
x
y
z
2 f 2 f 2 f
x 2 y 2 z 2
f f f
i
j k
MECH 395
Heat Transfer
Quiz #1
NAME:_
2013
SN:_
This quiz is closed book (text and notes). You may use a calculator. Please write legibly and
show your work part marks will be given.
Heat transfer from a transistor may be enhanced by inserting it in an al
MECH 395
1.
Equation Sheet
Modes of Heat Transfer:
Conduction
Fouriers Law
Convection
Newtons Law
qc h(T T )
qk k T
2.
1 T
q
2T
(constant k )
t
k
T
k T q
t
Gradient, f
Laplacian, , 2 f
Flat Plate
f f f
i
j k
x
y
z
2 f 2 f 2 f
x 2 y 2 z 2
f f f
i
j k
Lab
B03
B03
B03
B03
B03
B03
B03
B03
B03
B03
B03
B03
B03
Session
A
A
A
A
A
A
A
A
A
A
A
A
A
Group
1
1
1
1
2
2
2
3
3
3
4
4
4
Student
Bigah, Rapheal
Haque, Abrarul
Rao, Aakash
Zilkey, Ryker
Campbell, Wesley
Kashyap, Naveen
Tchernov, Philip
Delorme, Steve
Kupe
,ME (L1H .3 95
Heat Transfer _ . Quiz #l 10/] 19006
This quiz is closed book (text and notes). You may use a calculator. Please write legibly and
Show your work — part marks will be given.
An electrical sub-station converts high-voltage power fr
Numerical Solutions
Excel
10/16/2014
Mech 395 - Lecture 9
1
Mech 395 - Lecture 9
2
Example
10/16/2014
1
Analytic Solution
( x, y )
10/16/2014
2
(1) n 1
n x sinh( n y L)
sin
n
L sinh( n W L)
n 1
3
Mech 395 - Lecture 9
Calculating Heat Transfer from a
bod
MECH 395
Heat Transfer
FINAL EXAM
12/10/2010
UNIVERSITY OF VICTORIA
EXAMINATIONS DECEMBER 2010
INTRODUCTION TO HEAT AND MASS TRANSFER, MECH 395
DEPARTMENT OF MECHANICAL ENGINEERING
TO BE ANSWERED IN BOOKLETS
DURATION: 3 HOURS
INSTRUCTOR: DR. A. ROWE
STUDE
PROBLEM 3.10
KNOWN: A layer of fatty tissue with fixed inside temperature can experience different
outside convection conditions.
FIND: (a) Ratio of heat loss for different convection conditions, (b) Outer surface
temperature for different convection cond
PROBLEM 1.42
KNOWN: Process for growing thin, photovoltaic grade silicon sheets. Sheet dimensions and velocity.
Dimensions, surface temperature and surface emissivity of growth chamber. Surroundings and
ambient temperatures, and convective heat transfer c
PROBLEM 7.45
KNOWN: Dimensions and maximum allowable temperature of a silicon chip. Air flow conditions.
FIND: Maximum allowable power with or without unheated starting length.
SCHEMATIC:
ASSUMPTIONS: (1) Steady-state conditions, (2) Tf = 52C, (3) Negligi
PROBLEM 5.53
KNOWN: Initial temperature of concrete slabs. Air temperature and convection heat transfer
coefficient.
FIND: Slab thickness required so that Q/Qo = 0.90 for t = 8 h.
SCHEMATIC:
T = 200C, h = 35 W/m2K
T, h
Q/Qo = 0.9
at t = 8 h
2L
From
solar
PROBLEM 11.57
KNOWN: Dimensions of counterflow, concentric tube heat exchanger for recovering heat from
shower drains. Inlet temperatures of hot and cold water streams. Heat transfer coefficient of
inner (hot) flow. Mass flow rate of outer (cold) flow.
FI
Heat Exchangers:
The Effectiveness NTU
Method
Chapter 11
Sections 11.4 through 11.7
10/31/2014
Mech 395 - Lecture 14
1
Types of Heat Exchangers
Heat exchangers are ubiquitous to energy conversion and utilization.
involve heat exchange between two fluids
Transient Conduction:
Spatial Effects and the Role
of Analytical Solutions
Chapter 5
Sections 5.4 to 5.8
10/31/2014
Mech 395 - Lecture 11
2
Effects of Biot Number
10/31/2014
Mech 395 - Lecture 11
3
1
Plane Wall with Symmetrical
Convection Conditions
If lu
Energy
gy Balances and
Energy Transfer
Thermodynamics Review
Thermodynamics Review
Context
Interested in controlling/using work and heat
interactions
Understanding how work and heat are related requires us to
use
Laws of thermodynamics
Equations of state
MECH 395 Heat Transfer
Lab #2
Air Cooling of Electronic Equipment Part II: Validation and Experiments
Background:
A company has been experiencing premature failures of their electronic devices and has hired
you to provide recommendations as to how to impr
MECH 395 Heat Transfer
Lab Report Assessment
8/29/2014
Group Members:
Lab:
Weight
20
Component
1. Format
Content/Criteria
a. Nomenclature
b. Table of Contents
c. Neat, acceptable grammar, clear
calculations, concise.
d. Appropriate use of Figures (clear
a
UNIVERSITY
OF
VICTORIA
14 Nov 2014
Department of Mechanical Engineering
Course:
Mech 395 Heat Transfer
Instructor:
Dr. A. Rowe
Assignment:
Lab 01 Heat Sink Modeling
Submitted by:
No.
1
2
3
Name
Student Number
University of Victoria
D E PA R T M E N T O F