Middle East Technical University
December 25, 2015
Department of Chemical Engineering
ChE327 Heat and Mass Transfer Operations (Section 2)
Zeynep ulfaz-Emecen, Mustafa Yasin Aslan
2015-2016 Fall Semester
CLASSWORK
1) A chemical vapor deposition (CVD) proc
Middle East Technical University
October 28, 2015
Department of Chemical Engineering
ChE327 Heat and Mass Transfer Operations (Section 2)
Zeynep ulfaz-Emecen, Mustafa Yasin Aslan
2015-2016 Fall Semester
HOMEWORK 3
due November 6, 2015
1) Flaked cereals wh
Middle East Technical University
November 27, 2015
Department of Chemical Engineering
ChE327 Heat and Mass Transfer Operations (Section 2)
2015-2016 Fall Semester
SHELL AND TUBE HEAT EXCHANGERS
Shell and tube heat exchangers are among the most commonly us
CONVECTIVE HEAT TRANSFER
IN EXTERNAL FLOW
External Flow Examples
Fluid is not
confined within
solid boundaries
External Flow Characteristics
Flow over a plate:
Boundary layer thickness increases with increasing x
Boundary layer conditions may be,
Fully
RADIATIVE HEAT
TRANSFER
Conduction and
convection
alone does not
explain this!
Facts
Radiative heat transfer occurs parallel to other
heat transfer mechanisms (e.g. convection).
convection + radiation
convection + radiation
Facts
Thermal radiation is em
05.05.2014
CHE 204(03) Thermodynamics
Mathcad Tutorial 1
Introduction
Mathcad is a symbolic and numerical computation software with a spreadsheet-like
interface. It is capable of basic and advanced function evaluations and simple
programming. This tutoria
05.05.2014
CHE 204(03) Thermodynamics
Mathcad Tutorial 2
1. WORKING WITH VECTORS
In the previous tutorial, we used a range variable to define a set of values, e.g: i := 1, 1.5.5.
The same task can also be accomplished using vectors or matrices.
1a. Define
CHAPTER 3
PROPERTIES OF PURE SUBSTANCES
3.1 PHASE CHANGE OF A PURE SUBSTANCE
A pure substance is one which has a xed chemical composition throughout. It
may exist in more than one phase, but the chemical composition must be the
same in all phases, i.e., i
CHAPTER 1
INTRODUCTION
1.1 BASIC CONCEPTS
Problems encountered in science and engineering can be solved by the application of
the following basic concepts:
Conservation of mass,
Conservation of momentum,
First law of thermodynamics (or conservation of ene
Middle East Technical University
December 11, 2015
Department of Chemical Engineering
ChE327 Heat and Mass Transfer Operations (Section 2)
Zeynep ulfaz-Emecen, Mustafa Yasin Aslan
2015-2016 Fall Semester
CLASSWORK
1) A carbonated beverage is to be stored
CONVECTIVE HEAT TRANSFER
(a.k.a.) where do I find that h?
Laminar flow in a pipe or over a plate
Laminar flow:
Fluid flows in
parallel layers,
with no lateral
mixing
Flow over a solid object
Turbulent flow
over a plate
Analytical solution for
the velocity
Middle East Technical University
December 2, 2015
Department of Chemical Engineering
ChE327 Heat and Mass Transfer Operations (Section 2)
Zeynep ulfaz-Emecen, Mustafa Yasin Aslan
2015-2016 Fall Semester
HOMEWORK 7
due December 9, 2015
1) A one-shell pass,
Middle East Technical University
December 7, 2015
Department of Chemical Engineering
ChE327 Heat and Mass Transfer Operations (Section 2)
2015-2016 Fall Semester
TUTORIAL
A single-shell, double-tube pass heat exchanger is to cool 50,000 kg/h of ethylene g
Middle East Technical University
December 25, 2015
Department of Chemical Engineering
ChE327 Heat and Mass Transfer Operations (Section 2)
Zeynep ulfaz-Emecen, Mustafa Yasin Aslan
2015-2016 Fall Semester
HOMEWORK 10
due December 31 (12:00), 2015
1) The fi
Middle East Technical University
October 14, 2015
Department of Chemical Engineering
ChE327 Heat and Mass Transfer Operations (Section 2)
Zeynep ulfaz-Emecen, Mustafa Yasin Aslan
2015-2016 Fall Semester
HOMEWORK 1
due October 21, 2015
1) The top surface o
Middle East Technical University
October 21, 2015
Department of Chemical Engineering
ChE327 Heat and Mass Transfer Operations (Section 2)
Zeynep ulfaz-Emecen, Mustafa Yasin Aslan
2015-2016 Fall Semester
HOMEWORK 2
due October 28, 2015
1) Heat is generated
Middle East Technical University
December 16, 2015
Department of Chemical Engineering
ChE327 Heat and Mass Transfer Operations (Section 2)
Zeynep ulfaz-Emecen, Mustafa Yasin Aslan
2015-2016 Fall Semester
HOMEWORK 9
due December 23, 2015
1) A "drug patch"
Middle East Technical University
October 26, 2015
Department of Chemical Engineering
ChE327 Heat and Mass Transfer Operations (Section 2)
2015-2016 Fall Semester
TUTORIAL
1) Consider a 1000-W iron whose base plate
is made of 0.5-cm-thick aluminum alloy 20
Middle East Technical University
November 6, 2015
Department of Chemical Engineering
ChE327 Heat and Mass Transfer Operations (Section 2)
Zeynep ulfaz-Emecen, Mustafa Yasin Aslan
2015-2016 Fall Semester
HOMEWORK 4
due November 13, 2015
1) 10 square-shaped
Middle East Technical University
December 9, 2015
Department of Chemical Engineering
ChE327 Heat and Mass Transfer Operations (Section 2)
Zeynep ulfaz-Emecen, Mustafa Yasin Aslan
2015-2016 Fall Semester
HOMEWORK 8
due December 16, 2015
1) The diffusion co
Middle East Technical University
Department of Chemical Engineering
ChE327 Heat and Mass Transfer Operations
Zeynep ulfaz-Emecen, Mustafa Yasin Aslan
2015-2016 Fall Semester
October 12, 2015
TUTORIAL 1
1) Water flows inside a pipe that is at a temperature
CHAPTER 2
FORCE AND WORK
2.1 FORCE
Force is dened by Newtons second law of motion. It states that the net force F
acting on a body of mass is proportional to the time rate of change of its momentum.
If the mass is constant, the net force is proportional t
Middle East Technical University
Department of Chemical Engineering
CHE 204 Thermodynamics I, Section 03: Spring 2013-2014 Course Information
Instructor
Dr. Harun Koku
Office: D-114B
Phone: 2610
harunk@metu.edu.tr
Teaching Assistant
Hande Gne
Office: C102
Chapter 2
Thermodynamic Properties of Real
Substances
Thermodynamics deals with the work and heat interactions of the system with its surroundings
as it undergoes a process. These quantities can be estimated once the changes in various state
functions, na
PROBLEM 1.1 KNOWN: Heat rate, q, through one-dimensional wall of area A, thickness L, thermal
conductivity k and inner temperature, T1. FIND: The outer temperature of the wall, T2. SCHEMATIC:
ASSUMPTIONS: (1) One-dimensional conduction in the x-direction,
Due 17.10.2014
CHE 327(03) - Heat and Mass Transfer: HW1
Part I - Solve the following problems from Incropera
1.1, 1.9, 1.15, 1.18, 1.26, 1.29, 1.40, 1.47, 1.49, 1.72b (10 pts each)
Bonus: 1.72c (10 pts)
For the bonus problem, solve T for at least 4 value
Due 28.10.2014, 14:00
CHE 327(03) - Heat and Mass Transfer: HW2
Solve the following problems from Incropera
2.35, 3.15, 3.39, 3.47a, 3.105a, 3.112, 3.130 (15 pts each)
Bonus: 3.105b (10 pts)
Hints and answers:
2.35 Use the method in Incropera outlined for
26.09.2014
CHE 327(03) Thermodynamics
Mathcad Tutorial 2
1. WORKING WITH VECTORS
In the previous tutorial, we used a range variable to define a set of values, e.g: i := 1, 1.5.5.
The same task can also be accomplished using vectors or matrices.
1a. Define
Middle East Technical University
December 16, 2015
Department of Chemical Engineering
ChE327 Heat and Mass Transfer Operations (Section 2)
Zeynep ulfaz-Emecen, Mustafa Yasin Aslan
2015-2016 Fall Semester
CLASSWORK
A spherical cellular organism, 0.15 mm in
Middle East Technical University
November 6, 2015
Department of Chemical Engineering
ChE327 Heat and Mass Transfer Operations (Section 2)
Zeynep ulfaz-Emecen, Mustafa Yasin Aslan
2015-2016 Fall Semester
CLASSWORK
1) Consider cool air flowing at a velocity
FREE CONVECTION
Free convection: Basis
Body forces (e.g. gravitational, centrifugal, etc.) in
the presence of density gradients
Density gradients exist when there are
temperature gradients
< 0
(i.e. hot fluid rises)
Conservation equations
+
=0
2
+
Middle East Technical University
December 14, 2015
Department of Chemical Engineering
ChE327 Heat and Mass Transfer Operations (Section 2)
2015-2016 Fall Semester
TUTORIAL
1) A naphthalene sphere of 1 cm diameter is suspended in stagnant air by a thin thr
Middle East Technical University
December 21, 2015
Department of Chemical Engineering
ChE327 Heat and Mass Transfer Operations (Section 2)
2015-2016 Fall Semester
TUTORIAL
1) We would like to develop a model for computing the distribution of NO2 in the at