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Modules

Modules

CME1023 : Transfer Processes

Semesters
Semester 1 Credit Value: 13
Semester 2 Credit Value: 12
ECTS Credits: 13.0

Aims

• To provide knowledge of common fluid properties (e.g viscosity, density, surface tension etc.), heat and mass transfer.
• To provide a fundamental knowledge of the mechanisms of fluid flow and apply this knowledge to solve fluid flow problems commonly encountered in chemical engineering processes.
• To understand and apply the techniques for flow measurement.
• To provide an introduction to mass transfer theory and phase equilibria.
• To introduce the 3 types of heat transfer.
• To enable analysis of conductive systems in various geometries and with multiple layers
• To enable analysis of convective systems, with or without conduction
• To understand Reynolds analogy for heat transfer
• To introduce dimensional analysis, and its applications to heat transfer problems
• To introduce and enable analysis of extended surfaces
• To introduce radiative heat transfer
• To enable the students to design simple heat exchangers
To provide an introduction to mass transfer theory and phase equilibria.

This module teaches the fundamentals of momentum, heat and mass transfer processes.

Momentum transfer or fluid flow is one of the most important processes in chemical engineering. This module will provide students with fundamental knowledge for solving common chemical engineering flow problems. It will build on knowledge of fluid flow properties to introduce the concept of Reynolds number, frictional pressure drop and mechanical energy balances.

This module introduces the 3 basic types of heat transfer: conduction, convection and radiation. By the end of the module the students will be able to understand many everyday examples of heat transfer, as well as being able to solve many steady state heat transfer calculations that Chemical Engineers encounter on plant.

The module will explain the processes of mass transfer and diffusion and apply them to engineering systems of separation and reactions. These principles build on knowledge of fluid behaviour and the analogy between momentum; heat and mass transfer.

Outline Of Syllabus

Fluid mechanics (KB)
Properties of fluids (density, pressure, viscosity, surface tension, velocity etc.)
Flow regimes and Reynolds number
Poiseuille equation and velocity distribution for laminar flow in a circular pipe
Fluid energy, Continuity equations (conservation of momentum) and Mechanical Energy Balance/Bernouilli Equation for a flow system
Friction factors in pipes, pressure drop due to friction, relationship between flowrate and pressure drop
Losses due to fittings (valves & bends) and losses due to sudden contraction and enlargement
Pressure drop in non-circular sections
Flow measuring equipment: venturi, orifice plate and Pitot tube

Heat Transfer (APH)
1. Introduction to heat transfer: the 3 modes.
2. Conduction: Fourier’s Equation. Conduction through different 1-D geometries. Composite systems. Thermal resistances.
3. Convection: Newton’s Law of Cooling. Combined convection and conduction. The overall heat transfer coefficient. The Reynolds Analogy. Dimensional analysis. Convection correlations. Extended surfaces. Log mean temperature differences and simple heat exchanger design.
4. Radiation: Stefan-Boltzmann equation. Radiative heat transfer.

Mass transfer (KN)
Diffusion and diffusion coefficients
Ficks 1st law and equimolar counter diffusion.
Diffusion through a stationary phase and Stefan’s Law.
Two film theory
Individual and overall mass transfer coefficients.
Application of mass transfer coefficients

Teaching Methods

Teaching Activities
Category Activity Number Length Student Hours Comment
Scheduled Learning And Teaching ActivitiesLecture561:0056:00N/A
Guided Independent StudyAssessment preparation and completion13:003:00Exam
Guided Independent StudyAssessment preparation and completion128:0028:00Exam revision
Guided Independent StudyAssessment preparation and completion46:0024:00Lab Report writing.
Guided Independent StudyAssessment preparation and completion112:0012:00assessed coursework
Scheduled Learning And Teaching ActivitiesPractical43:0012:00N/A
Scheduled Learning And Teaching ActivitiesSmall group teaching201:0020:00Tutorials
Guided Independent StudyIndependent study195:0095:00Review lecture material, prepare for small group teaching
Total250:00
Teaching Rationale And Relationship

Lectures convey the basic concepts of momentum, heat and mass transfer and demonstrate their application in chemical engineering context. Tutorial classes support this through extended examples. Practical sessions allow theoretical principles developed in lectures to be applied in hands-on experiments to more effectively aid understanding and assimilation of material.

Assessment Methods

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

Exams
Description Length Semester When Set Percentage Comment
Written Examination1802A60N/A
Other Assessment
Description Semester When Set Percentage Comment
Report2M15Transfer Processes assignment (max 12 pages, Issued week 7 semester 2)
Practical/lab report1M25Laboratory reports in semester 1 and 2
Assessment Rationale And Relationship

The examination is an appropriate way to assess mathematical and analytical skills in combination with the fundamental knowledge. Students must pass the laboratory reports.

The assignment allows more realistic open ended, engineering problems to be investigated and solved.

Reading Lists

Timetable