4. Cross ﬂow over a tube bank, with additional details on the energy balance analysis
ln|emal How cl lluld
myougn me
g ’9 h V, Tm> j:{+ + +} V, T
{+H+H+}
% Row 1 Row 2 Row 3
(a) (b)
Figure 2: Cross ﬂow over tube banks. Left: 3D view; Middle: aligned a
Transient Conduction
1
Chapter 5: Transient Conduction
A heat transfer process for which the temperature varies
with time, as well as location within a solid.
T
k
x x
T
T T
+
k
+
k
+
q
=
c
p
t
y y z z
(2.17)
Bi =
hLC
k
Biot Number
The Biot Number an
Extended Surfaces
Chapter Three
Section 3.6
MEEG 342; lecture 6
Fins Enhance Heat Transfer From a Surface By
Enhancing Surface Area
2
"Heat and Mass Transfer: A Practical Approach, 3/e" By Yunus A. engel
MEEG 342; lecture 6
3
MEEG 342; lecture 6
Steady-st
MEEG 342; lecture 4
Chapter 3
One-Dimensional, Steady-State
Conduction without
Thermal Energy Generation
(Radial Systems)
Chapter Three
Sections 3.2 through 3.4
1
Heat Equation (Radial Systems)
MEEG 342; lecture 4
Cylindrical Coordinates:
1 T
kr
r r r
2
Heat Exchangers:
Chapter 11
Sec3ons 11.1 through 11.3
Types
Heat Exchanger Types
Heat exchangers are ubiquitous to energy conversion and utilization. They involve
heat exchange between two fluids separated by a solid and encompass a wide
r
and
8.3
The
(4k/ro) 2ro
NuD hD
8
k
k
5. Internal flow in a circular pipe
A typical example of internal flow is heat transfer (qs00 ) from the hot pipe wall of temperature
Ts to a fluid inside a pipe of diameter D. The flow is assumed to be steady (or sta
1. General description of convection heat transfer and terminology
Convection is a mode of heat transfer occurring between a solid body surface and a moving fluid
due to both fluid flow and thermal diffusion (i.e., conduction) within the fluid, thus the c
Two-Dimensional Steady-state
Conduc5on:
Finite-Dierence Equa5ons
and
Solu5ons
Chapter 4
Sec5ons 4.4 and 4.5
Finite-Dierence Method
The Finite-Difference Method
An approximate method for determining temperatures at discrete
(nodal)
2. Correlations of convection heat transfer for flows over a flat plate
For a laminar flow, the boundary layer equations can be solved analytically by first introducing
a similarity variable then performing numerical integration, to determine the temperat
a Mime. ‘ Wham L Lemcihvi‘mj'
, ﬂ? X=L yizL
.—il
- .7 ._ =L
m .7 .l’g.‘ no Lug-cit ewiah
w— *1 at gap '
oi: QLQWLmLeJ [Wu ham W airframe.)
04 I: “we ’9 {Hq‘ﬂ Shiite aoLﬁP—VUX men‘s-(-
23de am " T‘ at ~t=o w owoSk
Tom) = 3mm 1.] |<3o< 3» 4-1:
Lecture no:8
Transient Conduction:
Spatial Effects and the Role of
Analytical Solutions
Chapter 5
Sections 5.4 to 5.8
!
Solution to the Heat Equation for a Plane Wall with
Symmetrical Convection Conditions
Lecture no:8
If the lumped capacitance a
Natural Convection:
General Considerations
and Results for
Vertical and Horizontal Plates
Chapter 9
Sections 9.1 through 9.6.2, 9.9
General Considerations
General Considerations
Free convection refers to fluid motion induced by buoyancy forces.
Buoyancy
The midterm exam II notes
Summary notes on convection
Two example problems
Exam II
April 20, 1:20 pm to 2:25 pm, Smith 130
(15 more minutes than the usual class)
Closed book and notes
All correlations will be provided
Wangs summary notes on convection, co
The close date of the assignment has passed. You can no longer submit an answer.
Title
Homework Set 7
Due
Apr 11, 2016 1:25 pm
Grade Scale Points (max 10.0)
Instructions
Attached
Additional resources for assignment
HW7_2016.pdf ( 1 MB; Mar 31, 2016 11:07
The close date of the assignment has passed. You can no longer submit an answer.
Title
Homework Set 8
Due
Apr 18, 2016 1:25 pm
Grade Scale Points (max 10.0)
Instructions
attached.
Additional resources for assignment
HW8_2016.pdf ( 95 KB; Apr 9, 2016 3:46
The close date of the assignment has passed. You can no longer submit an answer.
Title
Homework Set 6
Due
Apr 4, 2016 1:25 pm
Status
Grade Scale
Not Started
Points (max 10.0)
Modified by instructor Mar 25, 2016 2:01 pm
Instructions
attached
Additional res
The close date of the assignment has passed. You can no longer submit an answer.
Title
Homework Set 5
Due
Mar 14, 2016 1:25 pm
Grade Scale Points (max 10.0)
Instructions
See the attached file.
Additional resources for assignment
HW5_2006.pdf ( 1 MB; Feb 2
Title
Homework Set 4
Due
Mar 9, 2016 1:25 pm
Grade Scale
Points (max 10.0)
Modified by instructor Mar 2, 2016 3:38 pm
Instructions
See attached file.
Additional resources for assignment
HW4_2016.pdf ( 167 KB; Feb 22, 2016 4:04 pm )
Submission
This assignm
Title
Homework Set 3
Due
Feb 29, 2016 1:25 pm
Grade Scale
Points (max 10.0)
Modified by instructor Feb 15, 2016 11:02 pm
Instructions
Attached.
Additional resources for assignment
HWK3_2016.pdf ( 310 KB; Feb 15, 2016 11:02 pm )
Submission
This assignment
The close date of the assignment has passed. You can no longer submit an answer.
Title
Homework set 1
Due
Feb 15, 2016 1:25 pm
Grade Scale
Points (max 10.0)
Modified by instructor Feb 9, 2016 10:41 pm
Instructions
Attached.
Additional resources for assign
The close date of the assignment has passed. You can no longer submit an answer.
Title
Homework Set 2
Due
Feb 22, 2016 1:25 pm
Grade Scale Points (max 10.0)
Instructions
Attached
Additional resources for assignment
HWK2_2016.pdf ( 80 KB; Feb 8, 2016 11:26
MEEG342 Homework Set #9. Heat exchanger analysis
Due Monday, 25 April 2016
P1. Many industrial processes require the rapid cooldown for gases. One method of doing so is
by the use of heat exchangers. Cold water flows in a steel pipe, with hot gases flowin
One-Dimensional, Steady-State
Conduction with
Thermal Energy Generation
Chapter Three
Section 3.5, Appendix C
Implications
MEEG 342; lecture 5
Implications of Energy Generation
Involves a local (volumetric) source of thermal energy due to conversion
from
1
Heat exchanger performance and design calculations
A summary note
Examples
Heat exchanger design
(An open-ended inverse problem)
Types
Heat Exchanger Types
Heat exchangers are ubiquitous to energy conversion and utilization. They involve
heat exchange
Energy Balance
Overall Energy Balance
Application to the hot (h) and cold (c) fluids:
Assume negligible heat transfer between the exchanger and its surroundings
and negligible potential and kinetic energy changes for each fluid.
q = m h ( ih ,i ih ,