Module Catalogue 2024/25

Pre Requisite Comment

N/A

Co Requisite Comment

N/A

Aims

This module reinforces and adds to the knowledge of heat transfer and fluid mechanics gained in Stage 1. The study of heat transfer is extended to systems which are no longer steady state and have changes in phase. Heat exchanger design is greatly extended from the simple counter and cocurrent designs to numerous designs. Radiative heat transfer is introduced. The fluid mechanics of pumps are studied in detail, and again the course extends the knowledge to analyse new types of fluids and flow, including gas flows and flows containing multiple phases.

1. Fluid Mechanics:
CME1023 provided a fundamental understanding of fluid flow and properties. This course aims to generalise fluid mechanics so that at a later stage, the knowledge gained can easily be used in numerical simulations, such that the students understand the meaning and implications of exact/approximate solutions in the description of fluids, flow geometry and flow kinematics. Governing fluid flow equations, including the equations of state, are obtained in 3D form in tensor notation and applied to the flow of Newtonian and non-Newtonian fluid flows in simple geometries. More complex fluid systems such as compressible and multi-phase fluids are also examined and related to the process industries.

2. Heat Transfer:
i. To extend the knowledge of the principles of heat transfer gained in CME1023 and to provide a fundamental knowledge of design criteria for typical forms of heat exchangers used in the process industries.
ii. To enable the students to analyse heat transfer in systems where there is change of phase.
iii. To introduce and analyse transient heat transfer.
iv. To allow the students to analyse systems where radiative heat transfer is significant/dominant.
v. To ensure that students can design and choose appropriate equipment in their design projects.

Outline Of Syllabus

Heat Transfer
1.       Review of heat transfer aspects of CME1023.
2.       Thermal circuits: combinations of heat transfer modes in series and parallel, including radiation.
3.       Boiling and condensing heat transfer. Nucleate and film boiling. Film and dropwise condensation.
4.       Analysis of transient phenomena. 1D conductivity equation. The lumped capacitance method.
5.       Heat exchanger design. Design methodology. Effectiveness-NTU and F-factor methods. Design and applicability of various heat exchanger forms: multipass, plate fin and compact heat exchangers.
6.       Basic concepts of radiation. Planck equation. View factors. View factor algebra. Grey enclosures. Radiosity. Radiation shields.

Fluids
1.       Review of fluid flow concepts from Transport Processes 1 .
2.       Momentum balances, 1 dimensional + examples, two dimensional, stresses in fluids flows, non- Newtonian fluids.
3.       Design of pumping systems, pipe networks, pump selection, NPSH.
4.       Compressible flow, compresser characteristics and selection.
5.       Multiphase flows, gas-liquid and liquid-liquid.
6.       Mixing, power curves for single phase mixing. Solids suspension.

Intended Knowledge Outcomes

At the end of this course students are expected to be able:

1) To understand the theoretical and practical aspects of process pipe system design, including frictional loss
calculations, pipe network analysis and pump selection. (AHEP4 C1, C2, C3, C4, C5).
2) To understand the features of compressible fluid flow in pipes. (AHEP4 C1, C2).
3) To understand the features of multiphase fluid flow in pipes including flow maps and the methods used to
calculate pressure drop in multiphase systems. (AHEP4 C1, C2, C3, C5).
4) To understands the principles of liquid mixing, solid suspension and gas dispersion and to be able to design
simple mixers and scale up lab data. (AHEP4 C1, C3, C4).
5) To analyse fluid flow problems using one and two dimensional dimensional momentum balances. (AHEP4 C1, C2,
C3).
6) To analyse complex systems with multimode heat transfer phenomena and to calculate a wide range of heat
transfer operating and design parameters (AHEP4 C1,2,5,6).
7) To explain heat transfer phenomena in systems with phase change, and to devise system designs for multiple
phase change regimes using the mathematical models learnt(AHEP4 C1-3,5).
8) To derive heat transfer models that allow analysis of transient systems with or without internal conductive
resistances (AHEP4 C1-3,5).
9) To analyse and to produce designs for heat exchangers, relating how design geometries, flow and heat transfer
interact in a qualitative and quantitative way, and appraising best technologies for each application (AHEP4
C1-6,13).
10) To combine information on optical properties and emissive behaviour of surfaces with geometric information
on the system, in order to devise models to calculate how heat transfer occurs by radiation (AHEP4 C1-3,5).

Intended Skill Outcomes

At the end of this course students are expected to be able:

1) To combine knowledge of simultaneous momentum, heat and mass transfer in 3D to devise system designs in
response to open-ended requirements for a technological application (AHEP4 C1-6, 12-13).
2) To extend the fluid mechanics and heat transfer knowledge and techno-scientific expertise through research
and use of literature and digital sources beyond those provided to cover the module syllabus, and application
of the acquired knowledge and expertise to open-ended design studies (AHEP4 C1-6, 13).
3) To develop conciseness, clarity and objectivity in reporting writing, and to further refine data presentation
skills (AHEP4 C17).

Teaching Rationale And Relationship

Lectures convey the mathematical concepts and techniques in fluid mechanics and heat transfer; tutorials are used to provide supervised problem solving; workshops are used to provide support during the open-ended design case study assignment, and additional time is reserved for independent study, for literature and digital sources research, and for assessment preparation.

Assessment Rationale And Relationship

The invigilated written exam will test both the fluids and heat transfer content studying in this module, containing a mixture of calculation-based questions, and critical evaluation questions (AHEP4 1-3,5,13).

The transfer processes assignment assesses the students’ ability to combine their knowledge of heat transfer and fluid flow to a chemical engineering open-ended design problem, making use of extended literature and digital sources research, and practicing report writing skills (AHEP4 1-6, 12, 13, 17).

General Notes

Original Handbook text: