Homework 1
Heat Transfer: 530.334
Due Date: Feb 11, 2015
Problem 1
What is the thickness required of a masonry wall having thermal conductivity 0.72 W/mK if the
heat rate is to be 55 % of the heat rate through a gypsum board having a thermal conductivity

Homework 2
Heat Transfer: 530.334
Due Date: Feb 18, 2015
Problem 1
The spherical, thin walled metallic container shown in Fig 1 is used to store liquid nitrogen at
77K. The container has a diameter of 0.5 m and is covered with an evacuated insulation syst

Introduction to Convection:
Flow and Thermal Considerations
Chapter Six and Appendix D
Sections 6.1 through 6.8
and D.1 through D.3
Boundary Layer Features
Boundary Layers: Physical Features
Velocity Boundary Layer
A consequence of viscous effects
assoc

530.334 HEAT TRANSFER
SPRING 2015
Instructor: Cila Herman
Department of Mechanical Engineering
Latrobe 102
Phone: 410-516 4467
E-mail: [email protected]
Topics covered
1. Course logistics, structure, syllabus
2. What is heat transfer?
3. Introduction to hea

One-Dimensional, Steady-State
Conduction without
Thermal Energy Generation
REVIEW: Rate equations
Fouriers law (heat conduction)
dT
qx kA
dx
Heat transfer rate [W]
Newtons law of cooling (convection)
q hA(Ts T f )
Heat transfer rate [W]
Stefan-Boltzmann l

Homework 6
Heat Transfer: 530.334
Due Date: April 8, 2015
Problem 1
A long wire of diameter D=1mm is submerged in an oil bath of temperature T =25o C. The wire
has an electrical resistance per unit length of Re =0.01/m. If a current of I=100A ows through

The heat diffusion equation
References and illustrations:
F. P. Incropera, D. P. DeWitt, Fundamentals of heat and mass
transfer, John Wiley & Sons, New York, 2002.
Y.A. Cengel, M.A. Boles, Thermodynamics an engineering
approach, 3rd edition, McGraw Hill,

Homework 5
Heat Transfer: 530.334
Due Date: April 1, 2015
Problem 1
Consider an innitely long two-dimensional n of thickness 2l. The base temperature of the n is
(uniform base temperature) and the ambient temperature is T . The heat transfer coecient is
h

Homework 4
Heat Transfer: 530.334
Due Date: Mar 4, 2015
Problem 1
A high temperature, gas-cooled nuclear reactor consists of a composite cylindrical wall for which
a thorium fuel element (k = 57 W/mK) is encased in graphite (k = 3W/mK) and gaseous helium

Homework 3
Heat Transfer: 530.334
Due Date: Feb 25, 2015
Problem 1
Derive the heat equation for the following n. Specify the dierential volume being used for your
analysis. Include heat generation in your problem q. List all of your assumptions.
15 points

, KNOWN: Materials, dimensions, properties and operating conditions of a gas-cooled nuclear reactor.
FIND: (a) Inner androuter surface temperatures of fuel element, (b) Temperature distributions for
different heat generation rates and maximum allowable ge

Homework 3
Heat Transfer: 530.334
Due Date: Feb 25, 2015
Problem 1
Derive the heat equation for the following n. Specify the dierential volume being used for your
analysis. Include heat generation in your problem q. List all of your assumptions.
15 points

Syllabus
530.334 HEAT TRANSFER
Spring 2014
(3 credits)
Instructor:
Dr.-Ing. Cila Herman
102 Latrobe Hall
410-516-4457 Office
[email protected]
General description
This is the first undergraduate-level one-semester course on Heat Transfer, and it focus

Homework 1
Heat Transfer: 530.334
Due Date: Feb 11, 2015
Problem 1
What is the thickness required of a masonry wall having thermal conductivity 0.72 W/mK if the heat rate is to be 55 % of the heat rate through
a gypsum board having a thermal conductivity

Homework 2
Heat Transfer: 530.334
Due Date: Feb 18, 2015
Problem 1
The spherical, thin walled metallic container shown in Fig 1 is used to store liquid nitrogen at
77K. The container has a diameter of 0.5 m and is covered with an evacuated insulation syst

Thermal resistances:
an introduction
Heat transfer (or heat) is energy in transit due to a
temperature difference.
Whenever there is a temperature difference (driving
force) in the medium, heat flow must occur as a result
How to describe/model heat tra