| Title: | Psychrometric Design |
|---|
| Long Title: | Psychrometric Design |
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| Field of Study: |
Environmental Science
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| Valid From: |
Semester 1 - 2016/17 ( September 2016 ) |
| Module Coordinator: |
MICHAEL J O MAHONY |
| Module Author: |
FERGUS DELANEY |
| Module Description: |
This module addresses issues relating to the design of systems and equipment to deliver a specified cooling load.
Psychrometric, mass flow and energy balance equations are applied to system and component analysis. Optimisation of design conditions is undertaken to minise the load on air conditioning plant. |
| Learning Outcomes |
| On successful completion of this module the learner will be able to: |
| LO1 |
Apply engineering science fundamentals to develop mass flow and energy balance equations for psychrometric analysis. |
| LO2 |
Select and manipulate standard psychrometric processes to achieve a specified design state |
| LO3 |
Optimise design conditions to minimise the load on air conditioning plant. |
| LO4 |
Apply design conditions and system operating parameters to design components of an air conditioning system. |
| Pre-requisite learning |
Module Recommendations
This is prior learning (or a practical skill) that is strongly recommended before enrolment in this module. You may enrol in this module if you have not acquired the recommended learning but you will have considerable difficulty in passing (i.e. achieving the learning outcomes of) the module. While the prior learning is expressed as named CIT module(s) it also allows for learning (in another module or modules) which is equivalent to the learning specified in the named module(s). |
| No recommendations listed |
Incompatible Modules
These are modules which have learning outcomes that are too similar to the learning outcomes of this module. You may not earn additional credit for the same learning and therefore you may not enrol in this module if you have successfully completed any modules in the incompatible list. |
| No incompatible modules listed |
Co-requisite Modules
|
| No Co-requisite modules listed |
Requirements
This is prior learning (or a practical skill) that is mandatory before enrolment in this module is allowed. You may not enrol on this module if you have not acquired the learning specified in this section. |
| No requirements listed |
Co-requisites
|
| No Co Requisites listed |
Module Content & Assessment
| Indicative Content |
|
Properties of air and water mixtures
Composition of air, gas laws, saturation vapour pressure, percentage saturation and relative humidity, enthalpy, dew point, calculation of properties from first principles, determination of properties from tables and charts.
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Psychrometric processes
Sensible heating, sensible cooling, mixing of air streams, dehumidification, contact factor, bypass factor, adiabatic humidification, isothermal humidification, water treatment for humidification, humidification requirements in industry, cooling and dehumidification with reheat, pre-heat and humidification with reheat, mixing and adiabatic saturation with reheat
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Design supply air state
Derivation of sensible and latent heat equations, derivation of specific heat capacity of humid air, derivation of heat gains from fan power, selection of supply air states to avoid wasteful reheat.
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Humidification
Psychrometrics of humidification, methods of humidification, water treatment for humidification, absorption drying
|
| Assessment Breakdown | % |
|---|
| Course Work | 20.00% |
| End of Module Formal Examination | 80.00% |
| Course Work |
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| Assessment Type |
Assessment Description |
Outcome addressed |
% of total |
Assessment Date |
| Other |
Students shall submit solutions to a number of numerical based design questions |
1,2,3,4 |
20.0 |
Week 10 |
| End of Module Formal Examination |
|---|
| Assessment Type |
Assessment Description |
Outcome addressed |
% of total |
Assessment Date |
| Formal Exam |
End-of-Semester Final Examination |
1,2,3,4 |
80.0 |
End-of-Semester |
| Reassessment Requirement |
Repeat examination
Reassessment of this module will consist of a repeat examination. It is possible that there will also be a requirement to be reassessed in a coursework element.
|
The institute reserves the right to alter the nature and timings of assessment
Module Workload
| Workload: Full Time |
| Workload Type |
Workload Description |
Hours |
Frequency |
Average Weekly Learner Workload |
| Lecture |
Course content |
4.0 |
Every Week |
4.00 |
| Independent & Directed Learning (Non-contact) |
Student study and research |
3.0 |
Every Week |
3.00 |
| Total Hours |
7.00 |
| Total Weekly Learner Workload |
7.00 |
| Total Weekly Contact Hours |
4.00 |
| Workload: Part Time |
| Workload Type |
Workload Description |
Hours |
Frequency |
Average Weekly Learner Workload |
| Lecture |
Lecture |
4.0 |
Every Week |
4.00 |
| Directed Learning |
Study |
3.0 |
Every Week |
3.00 |
| Total Hours |
7.00 |
| Total Weekly Learner Workload |
7.00 |
| Total Weekly Contact Hours |
4.00 |
Module Resources
| Recommended Book Resources |
|---|
- W.P. Jones 2001, Air Conditioning Engineering, 5th Ed., Butterworth Heinemann Oxford [ISBN: 0 7506 5074 5]
- CIBSE 2006, A Guide - Environmental Design, 7th Ed., CIBSE London [ISBN: 1-903287-66-9]
- CIBSE 2012, Practical Psychrometry, CIBSE [ISBN: 978-1-906846-26-8]
- CIBSE / HEVAC Humidity Group 2012, Humidification, CIBSE [ISBN: 978-1-906846-25-1]
| | This module does not have any article/paper resources |
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| Other Resources |
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- On-line database: CIT, IHSn/a
- Website: CIBSE Knowledge Portaln/a
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Module Delivered in
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