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Modules

Modules

CME2023 : Transfer Processes 2

Semesters
Semester 1 Credit Value: 20
ECTS Credits: 10.0

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.

Teaching Methods

Teaching Activities
Category Activity Number Length Student Hours Comment
Scheduled Learning And Teaching ActivitiesLecture441:0044:00N/A
Guided Independent StudyAssessment preparation and completion120:0020:00Transfer Processes Assignment
Guided Independent StudyAssessment preparation and completion13:003:00Exam
Guided Independent StudyAssessment preparation and completion122:0022:00Exam revision
Scheduled Learning And Teaching ActivitiesSmall group teaching221:0022:00Tutorials
Guided Independent StudyIndependent study189:0089:00Study and research on module topics and review of lecture material.
Total200:00
Teaching Rationale And Relationship

Lectures convey the mathematical concepts and techniques in fluid mechanics and heat transfer; tutorials (given within lecture slots) are used to provide supervised problem solving; assignments are for independent study and research.

Assessment Methods

The format of resits will be determined by the Board of Examiners

Exams
Description Length Semester When Set Percentage Comment
Written Examination1801A75N/A
Other Assessment
Description Semester When Set Percentage Comment
Report1M25Transfer Processes assignment. Issued week 7 in Semester 1. (Approx 5 Pages)
Assessment Rationale And Relationship

The unseen examination is used to assess the understanding of the basic principles of fluid mechanics and heat transfer as well as the ability to solve fluid flow problems starting from the general 3-dimensional forms of momentum equations or equations of state.

The transfer processes assignment assesses the students’ ability to implement in detail the knowledge gained in a combined heat transfer and fluid flow problem assignment.

Reading Lists

Timetable