CH EN 3453 Heat Transfer
External Flow
Cylinders and Spheres
Sections 7.4-7.5
Reminders
No school next week
Project outline due today
Can turn in to basket in ChE office as late as 4:30 pm
See Oct 3 lecture slides for suggestion.
Homework #6 due Fri

CH EN 3453 Heat Transfer
Review:
Convection and
Heat Exchangers
Chapters 6, 7, 8, 9 and 11
Reminders
Midterm #2 Wednesday at 8:15 AM
Review tomorrow 3:30 PM in WEB L104 (I think)
Project Results and Discussion due Friday at 4:00PM
Turn in to Chem Engi

CH EN 3453 Heat Transfer
Radiation:
Network Representations and
Multimode Heat Transfer
Sections 13.2 to 13.3
Reminders
Final Heat Exchanger report due Wednesday next week
Email PDF version to [email protected] by 8:00 pm
25% loss for every day late
Do

CH EN 3453 Heat Transfer
Radiation:
Gray Surfaces in Enclosures
and Network Representations
Section 13.2
Reminders
Homework #11 due Monday, Dec 1
No help session for this one
.but all the solutions are on the web
Remember to peer review the reports yo

CH EN 3453 Heat Transfer
Radiation:
View Factors
Section 13.1
Reminders
Homework #11 due Monday next week
There will be no help session for this one!
Homework #12 due Mon the following week
Project peer reviews due Wednesday next week
Details on how

CH EN 3453 Heat Transfer
Introduction to
Heat Exchangers
Sections 11.1 to 11.3
News Flash
Project experimental section due Friday
Project theory section due a week from Friday
Homework #8 due Friday
Problem #5 has only parts (a) and (b). Solution
incl

CH EN 3453 Heat Transfer
Radiation:
Multi-Surface Systems and
Radiation with Participating
Media (Gas Radiation)
Sections 13.4 and 13.5
Reminders
Homework #12 due Monday
Final project report due Wednesday
Email PDF version to [email protected] by 8:0

CH EN 3453 Heat Transfer
Review:
Conduction
Breaking News
No more homework (yay!)
Final project reports due today by 8:00 PM
Email PDF version to [email protected]
Review grading rubric on Project page of web
site
Final exam Wednesday, Dec. 17 at 8

CH EN 3453 Heat Transfer
Summary of Heat
Transfer by Radiation
Chapters 12 and 13
Reminders
Homework #12 due today (last one!)
Turn in by 4:00 PM to ChE main office
Scores on web site are updated, so you should be able to complete #1(a)
Sorry bout that

CH EN 3453 Heat Transfer
Radiation:
Network Representations
Continued
Sections 13.2 to 13.3
Reminders
Report Peer Reviews due Today by 8:00 PM
Email marked-up Word document directly to students, with a copy to
[email protected]
Final Heat Exchanger rep

CH EN 3453 Heat Transfer
Blackbody Radiation
Sections 12.3 to 12.6
Reminders
Homework #10 due Friday
Help session 4:30 Wednesday in MEB 3235
Final draft report due Friday
Email to Prof. Whitty in Microsoft Word format
Name the file Draft - Firstname

CH EN 3453 Heat Transfer
Radiation:
Gray Surfaces
Sections 12.5 to 12.8
Reminders
Homework #10 due Friday
Help session 4:30 today in MEB 3235
Final draft report due Friday
Email to [email protected] in Microsoft Word format
Name the file Lastname_F

CH EN 3453 Heat Transfer
Internal Flow
Heat Transfer Correlations
Sections 8.4 to 8.8, 8.10
Reminders
Experimental writeup due Wednesday next
week
Check www.che.utah.edu/projects_lab/
Homework #7 due Friday
Help session today 4:30 pm
Room MEB 2325
Ex

CH EN 3453 Heat Transfer
Introduction to Natural
Convection
Chapter 9
Reminders
Homework #9 due Friday
Project Theory section due Friday this week
Project Results & Discussion section due
Friday next week
Midterm #2 Wednesday next week
Covers chapter

CH EN 3453 Heat Transfer
Heat Exchangers:
Effectiveness-NTU Analysis
Sections 11.4 to 11.5
Reminders
Homework #8 due today
Units on problem 9, part (b) are obviously wrong; area should
be m2 and not kW
Experimental section of report due today
Turn in

CH EN 3453 Heat Transfer
Intro to Heat Exchagers
plus
Experimental Design
and Data Analysis
Info
Homework #8 due Friday
Help session Wed at 4:30 in MEB 2325
Experimental section of project report due Friday at 4:00 PM
Include description of equipment as

CH EN 3453 Heat Transfer
Heat Exchangers:
Effectiveness-NTU Analysis
and an Alternate Approach
Sections 11.4 to 11.7, plus 11S.1 (supplemental material)
Reminders
Homework #9 due Friday
Help session Wednesday 4:30 PM in MEB 2325
Theory section of repor

CH EN 3453 Heat Transfer
Introduction to Radiation
Sections 12.1 to 12.3
News!
Homework #10 due Friday next week
Help session Wed at 4:30 pm in MEB 2325
Results and Discussion section due 4PM today
Be sure to include at least 1 table, 1 graph and expl

CH EN 3453 Heat Transfer
Radiation:
Solar and Environmental
Radiation
Sections 12.7 - 12.10
News
Homework #10 due Today
Homework #11 due Monday after Thanksgiving
No help session
Final report draft report due today
Email to [email protected] in Micros

CH EN 3453 Heat Transfer
Free Convection:
Empirical Correlations
and
Phase Change Heat Transfer!
Chapters 9 and 10
Reminders
Homework #9 due today
Project Results & Discussion section due
Wednesday
Turn in to basket in ChE office by 4:00 PM
Midterm #2

CH EN 3453 Heat Transfer
Review:
Convection
Reminders
Final exam Wednesday Dec. 17, 8-10 am
This room
Two parts
10 multiple choice-type review questions
3 radiation calculation problems
You can bring three 8.5 x 11 sheets of notes
(both sides)
Dont

Conservation and Accounting Framework An Introduction
http:/www.foundationcoalition.org
Introduction
The conservation and accounting framework for engineering science structures topics around several common concepts to help
students (1) grasp relationship

Kev's Tips for Excel
Below are a few tips and fancy things that one can do in Excel to make solving problems,
particularly those that involve iterative solutions, easier. This guide assumes that the reader is
familiar with basic Excel concepts. The screen

Chemical Engineering 3453 / Heat Transfer
Solution to Homework Assignment 4
Prof. Geoff Silcox
Chemical Engineering
University of Utah
Due Tuesday, 2015 September 22, by 17:00
To ensure that you receive full credit for your solutions, write out all equati

Chemical Engineering 3453 / Heat Transfer
Solution to Homework Assignment 5
Prof. Geoff Silcox
Chemical Engineering
University of Utah
Due Tuesday, 2015 September 29, by 23:59
To ensure that you receive full credit for your solutions, write out all equati

Chemical Engineering 3453 / Heat Transfer
Solution to Homework Assignment 6
Prof. Geoff Silcox
Chemical Engineering
University of Utah
Due Tuesday, 2015 October 6, by 23:59
To ensure that you receive full credit for your solutions, write out all equations

Chemical Engineering 3453 / Heat Transfer
Solution to Homework Assignment 7
Prof. Geoff Silcox
Chemical Engineering
University of Utah
Due Tuesday, 2015 October 20, by 23:59
To ensure that you receive full credit for your solutions, write out all equation

Chemical Engineering 3453 / Heat Transfer
Solution to Homework Assignment 8
Prof. Geoff Silcox
Chemical Engineering
University of Utah
Due Tuesday, 2015 October 27, by 23:59
To ensure that you receive full credit for your solutions, write out all equation

Chemical Engineering 3453 / Heat Transfer
Solution to Homework Assignment 11
Prof. Geoff Silcox
Chemical Engineering
University of Utah
Due Tuesday, 2015 November 24, by 23:59
To ensure that you receive full credit for your solutions, write out all equati

Chemical Engineering 3453 / Heat Transfer
Solution to Homework Assignment 9
Prof. Geoff Silcox
Chemical Engineering
University of Utah
Due Tuesday, 2015 November 3, by 23:59
To ensure that you receive full credit for your solutions, write out all equation

External Flow Flat Plate
Where can you envision modeling flow past a flat plate?
What is unique about external flow scenarios?
We need to find the convection coefficient to determine heat transfer.
Local:
Average:
How does one

Free Convection in Parallel Plate Channels
L/S
L/S
L
x
x
S
",
As
S
For symmetric, isothermal plates:
# =
Sopt =
Smax =
For isoflux surfaces:
Ras* =
NuS,L
NuS,L =
Sopt =
Smax =
Rect

Turbulent Flow
Analysis of turbulent flow can be very challenging emphasis on correlations
Fully developed turbulent flow (hydrodynamically and thermally):
Dittus Boelter (up to 25% error)
Nu =
Sieder and Tate (up to 25% error)

Laminar Free Convection
A. Isothermal vertical surface in a quiescent medium
Recall:
u v
mass
+
=0
x y
x-momentum u
energy
u
u
u
2 u
+v
= g (T T ) + 2
x
y
y
T
T
2 T
+v
= 2
x
y
y
Similarity Variable
=
How does this simplify the above