Short Title:Refrigeration and HVAC
Full Title:Refrigeration and HVAC
Module Code:HVAC H3001
Credits: 5
NFQ Level:7
Field of Study:Electricity and energy
Module Delivered in 2 programme(s)
Module Author:NOEL CLEARY
Module Description:This module aims to familiarize with the student with ventilation, refrigeration and air-conditioning processes and systems. In addition they will apply their knowledge to the analysis of selected industrial and commercial applications.
Learning Outcomes
On successful completion of this module the learner will be able to:
LO1 Describe the circumstances where control of the indoor environment is required and the parameters that must be controlled.
LO2 Describe typical ventialtion and air-conditioning systems including constant volume, variable air volume, reheat, dual duct and other variants of all-air systems
LO3 Plot air conditioning processes on psychrometric charts and evaluate loads on system elements
LO4 Describe the layout and the functioning of each of the elements of simple direct expansion and cascade refrigeration systems.
LO5 Evaluate cooling capacity, coefficient of performance and running costs for simple direct expansion and cascade refrigeration systems using hydrocarbon based refrigerants ammonia,and carbon dioxide
LO6 Describe the layout and operating principles of absorption refrigeration systems
Pre-requisite learning
Co-requisite Modules
No Co-requisite modules listed

Module Content & Assessment

Content (The percentage workload breakdown is inidcative and subject to change) %
Comfort and the indoor environment
A descriptive approach to the factors that influence comfort in an internal environment. Calculation of some basic parameters such as resultant temperature, mean radiant temperature. Ashrea 555 and other relevant comfort standards
An introduction to ventilation systems
An introduction to ventilation systems and system components. Theory of air flow in ducts and its application to the selection and sizing of ductwork elements. Fan selection and sizing
Air conditioning systems
Descriptions of common all-air systems including constant volume, re-circulating systems,VAV, dual duct and reheat systems.
Air conditioning theory and processes
The thermodynamic theory of air/water mixtures. Air conditioning processes, pshychrometric charts. Plotting of typical air-conditioning process on the chart. Load calculations for selected scenarios.
The simple direct expansion system, the cycle on the P-h chart, load calculations and coefficient of performance. Refrigerants, properties and applications. Typical domestic, commercial and industrial refrigeration applications including multi-stage and cascade type systems. Absorption refrigeration systems
Assessment Breakdown%
Course Work40.00%
End of Module Formal Examination60.00%
Course Work
Assessment Type Assessment Description Outcome addressed % of total Assessment Date
Continuous Assessment Lab practical to develop the characteristic for a centrifugal fan. 2,3 10.00 Week 3
Laboratory Lab practical to evaluate the loads on an air conditioning plant 1,2,3 10.00 Week 5
Laboratory Lab practical to evaluate the performance of a laboratory refrigeration plant. 4,5 10.00 Week 8
Continuous Assessment An online quiz on aspects of ventilation space cooling and refrigeration systems 1,2,3,4,5,6 10.00 Week 11
End of Module Formal Examination
Assessment Type Assessment Description Outcome addressed % of total Assessment Date
Formal Exam End-of-Semester Final Examination 1,2,3,4,5,6 60.00 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.

IT Tallaght 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 Class Work 2.00 Every Week 2.00
Laboratories Practical Session in Laboratory 3.00 Every Third Week 1.00
Independent Learning Time Outside of Class 3.00 Every Week 3.00
Tutorial Tutorial on solving analytical problems 1.00 Every Week 1.00
Total Weekly Learner Workload 7.00
Total Weekly Contact Hours 4.00
This module has no Part Time workload.

Module Resources

Required Book Resources
  • Clive Beggs, 2009, Energy: Management, Supply and Conservation, Second Edition, 2nd Ed., Elsevier Ltd UK [ISBN: 9780750686709]
  • Yunus A. Cengel, Michael A. Boles 2006, Thermodynamics, 6th ed Ed., McGraw-Hill Higher Education Boston [ISBN: 9780072884951]
Recommended Book Resources
  • 2004, Modern Refrigeration and Air Conditioning, 1st ed Ed., Goodheart-Willcox Pub, [ISBN: 9781590702888]
This module does not have any article/paper resources
This module does not have any other resources

Module Delivered in

Programme Code Programme Semester Delivery
TA_EAEEE_B Bachelor of Engineering (Honours) in Sustainable Energy Engineering 5 Mandatory
TA_EAEEE_D Bachelor of Engineering in Energy and Environmental Engineering 5 Mandatory