The Hong Kong University of Science and Technology
Heat and Mass Transfer
CENG 3220

Spring 2016
2016/02/03 Lecture 1
1. Introduction
1.1introduction to heat transfer and heat conduction
Definition:
Heat transfer deals with the transport of thermal energy due to temperature differences. It is
concerned with the rate of heat flow as well as the assoc
The Hong Kong University of Science and Technology
Heat and Mass Transfer
CENG 3220

Spring 2016
Chapter 6 Multiple reactions
6.1 Reaction in series
6.2 Complex reactions
1
4 Types of Multiple Reactions
Series:
ABC
Parallel:
AD
AU
Independent:
AB
CD
Complex:
A + B C + D
A+CE
With multiple reactors, either molar flow or number of moles
must be use
The Hong Kong University of Science and Technology
Heat and Mass Transfer
CENG 3220

Spring 2016
CENG 3230
Reaction and Reactor Engineering
Instructor:
Yuan Shuai LIU, Marshal
Tel: 23588409
keysliu@ust.hk
1
Office: 4551
Course Learning outcomes
Upon the completion of this subject, students will be able to
(1) Understand the basic principles of react
The Hong Kong University of Science and Technology
Heat and Mass Transfer
CENG 3220

Spring 2016
Quiz 1A: Mole balances and Reactor sizing
Student Name: _
Student No.: _
Full marks: 50. Duration: 45 min. Necessary data may be found from lecture notes.
1. Multiple choices (Circle the right answer):
(10 marks)
1). Which equation is used in arriving at
The Hong Kong University of Science and Technology
Heat and Mass Transfer
CENG 3220

Spring 2016
Chapter 4: Analysis of Rate Data
Determining the Rate Law from Experimental Data
1) Integral Method
2) Differential (Graphical, Polynomial) Method
1). Integral Method
Consider the following reaction that occurs in a constant
volume Batch Reactor: (We will
The Hong Kong University of Science and Technology
Heat and Mass Transfer
CENG 3220

Spring 2016
Chapter 3: Rate Laws and Stoichiometry
3.1 Rate Laws
3.2 Stoichiometry in batch & flow systems
Review Chapter 1
Reactor Mole Balances Summary
The equations apply to the four major reactor types (and the general
reaction AB)
Reactor
Differential
Algebraic
The Hong Kong University of Science and Technology
Heat and Mass Transfer
CENG 3220

Spring 2016
Chapter 5: Isothermal Reactor
5.1 Mole Balances in terms of Conversion
5.2 Pressure drop in PBR
5.2 Membrane reactor and Semibatch reactor
5.1 Mole Balances in terms of Conversion
Algorithm for Isothermal Reactor Design
1. Mole Balances and Design Equatio
The Hong Kong University of Science and Technology
Heat and Mass Transfer
CENG 3220

Spring 2016
Example 1.1
q'x' =k
k ( T 2T 1 )
L
dT
dx
'
'
q x =q x A=q x HW
( 1.7 W m1 K1 ) ( 1150 K1400 K )
0.15 m
( 2833.33 W m 2 ) ( 1.2 m ) ( 0.5 m )
2833.33 W m
1700 W
Example 1.2
'
q'conv
=h ( T sT )
'
q'rad
=EG
( 15 W m2 K1 ) [ (20025 ) K ]
T 4s T 4surr
The Hong Kong University of Science and Technology
Heat and Mass Transfer
CENG 3220

Spring 2016
Example 1.4
h ( DL ) ( T T ) ( DL ) ( T 4 T 4surr )
= E store
L
L
E
out =I 2 R
E
I 2 Rh ( D ) ( T T )( D ) ( T 4 T 4surr )= E store
I 2 Rh ( D ) ( T T )( D ) ( T 4 T 4surr )=
d
( Ac cT )
dt
I 2 Rh ( D ) ( T T )( D ) ( T 4 T 4surr )=
2
( )
D
dT
c
4
dt
[
The Hong Kong University of Science and Technology
Heat and Mass Transfer
CENG 3220

Spring 2016
Chapt 7 Reaction mechanism and
Bioreaction
7.1 Active Intermediates and Nonelementary Rate laws
7.2 Enzymatic reaction
7.3 Bioreactors
7.1 Active Intermediates & Nonelementary Rate laws
Example
The rate law for the reaction
A BC
is found from experiment t
The Hong Kong University of Science and Technology
Heat and Mass Transfer
CENG 3220

Spring 2016
Chapter 52: Isothermal Reactor
5.3 Membrane reactor
5.4 Semibatch reactor
5.3 Membrane Reactors
Membrane reactors can be used for thermodynamically limited
reactions, to achieve conversions greater than the original
equilibrium value, by removing the rea
The Hong Kong University of Science and Technology
Heat and Mass Transfer
CENG 3220

Spring 2016
Chapter 2: Conversion and Reactor Sizing
1) Definition of Conversion, X
2) Develop the Design Equations in terms of X
3) Size CSTRs and PFRs given rA= f(X)
4) Conversion for Reactors in Series
1
Define conversion, X
Consider the generic reaction:
a A bB
The Hong Kong University of Science and Technology
Heat and Mass Transfer
CENG 3220

Spring 2016
Radiation:
Blackbody Radiation and Grey Surfaces
S. Yao MECH3310 Lecture 20 Ch 12.312.8 22/04/2016
1
The Planck Distribution
The spectral distribution of the blackbody emissive power (determined
theoretically and confirmed experimentally) is
E,b varies