MEEN30100 Engineering Thermodynamics II

Academic Year 2022/2023

This module performs two main functions. Firstly, it deepens and broadens the Thermodynamic foundations established in the Stage 1 module MEEN10010 Energy Engineering, in particular with respect to the 2nd Law of Thermodynamics. Second, it exploits that strengthened framework to describe and analyse common engineering components and power-generation cycles.

Throughout the module, reference is made to the importance of energy for achieving the UN Sustainable Development Goals (SDGs). Renewable energy systems (RES) are analysed from a thermodynamic perspective, and their performance and sustainability compared with traditional, fossil-based systems.

The module begins with a review of the 1st Law of Thermodynamics, and an introduction to the 2nd Law that emphasises the distinction between heat and work. These laws are then applied to the analysis of Otto, Diesel, Brayton-Joule, and Rankine cycle heat engines, representative of petrol, diesel and jet engines, and steam-powered electricity generation plant respectively. The combined-cycle gas turbine (CCGT) plant is then investigated.

The concept of exergy is then introduced, and used to derive 2nd Law efficiency metrics for components (e.g. nozzles, diffuses, compressors) and cycles. The module concludes with a brief look at the thermodynamics of gas mixtures and of combustion.

In addition to the formal lectures, students each complete two laboratory practicals, related to engine operation and refrigeration respectively. These laboratory sessions aim to deepen the student's engagement with the subject, develop their ability to work as a team, improve their engineering communication skills, and enhance their capacity to conduct experiments and to analyse and interpret data. All laboratories are carried out with reference to current School Health and Safety protocols. Students should follow these during all laboratory activities. Further information is available at https://intranet.ucd.ie/smme/index.html and within the Brightspace resources for this module.

Students are encouraged to use one or more of the following text books to support their learning in this module:
"Thermodynamics: an engineering approach". Cengel and Boles, McGraw-Hill.
"Fundamentals of thermodynamics". Sonntag, Borgnakke and Van Wylen, Wiley.
"Modern engineering thermodynamics". Balmer, Elsevier.

Students should note that a non-standard marking system is used in this module, for all grades above C-. 50% corresponds to a grade of C- as usual; grade boundaries are then drawn at intervals of 5%, up to the A+ boundary at 90%. So 55% equates to a grade of C; 60% to a grade of C+; 65% to a grade of B-, etc.