Code: | EM0024 | Acronym: | T II |
Keywords | |
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Classification | Keyword |
OFICIAL | Heat Transfer and Fluid |
Active? | Yes |
Responsible unit: | Fluids and Energy Division |
Course/CS Responsible: | Master in Mechanical Engineering |
Acronym | No. of Students | Study Plan | Curricular Years | Credits UCN | Credits ECTS | Contact hours | Total Time |
---|---|---|---|---|---|---|---|
MIEM | 226 | Syllabus since 2006/2007 | 2 | - | 6 | 58,5 | 162 |
ENG |
Know how to analyse any thermal engine system in light of the First and Second Law of Thermodynamics. Being able to propose improvements in existing thermal motor systems in terms of their characterizing parameters. Know how to analyse any refrigeration machine and heat pump in light of the First and Second Law of Thermodynamics as well as propose solutions for a better performance. Be able to analyse non-reactive and reactive gaseous mixtures with emphasis on air conditioning and combustion processes.
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Thermodynamics is among the great scientific and technical areas, a mother area par excellence since it supports the problem of energy conversion vs. heat. work or thermal energy-mechanical energy and constitutes the backbone of the living sciences. In this context, in the programmatic contents of this UC, chapter by chapter, the basic principles are valued and the conceptualization and the strategy of the use of thermodynamics in the problematic of the energetic conversion of heat vs. work are structured. To do so, most of these existing systems are analysed, making a comparison between all, advantages and disadvantages are discussed. Being that in our society the refrigeration sector is vital, the study of refrigeration systems and heat pumps is carried out in detail. In the two final chapters the air conditioning and the combustion process, essential for the analysis of the thermal machines, are analysed in detail.
Thermodynamics I
FUNDAMENTAL CONCEPTS FOR THE ENERGY CONVERTERTION SYSTEMS ANALYSIS. Efficiency, work ratio and specific consumption of steam/gas systems. THERMODYNAMIC ANALYSIS OF THEFRMAL ENGINE CYCLES Carnot, Rankine, Joule-Brayton and Reciprocating engines cycles. Analysis of the variables. THERMODYNAMIC ANALYSIS OF REFRIGERATING SYSTEMS AND HEAT PUMPS. Analysis of the variation of the COP of these systems as a function of possible changes that can be implement in the ideal cycles. Refrigerant fluids, their classification and impact on the environment. Analysis of variables. GAS MIXTURES Mass, molar and volume fraction of mixtures and their relationship. Dalton’s, Gibb Daltons’ and Amagat’s law. Thermodynamic properties of gaseous mixtures. Second Law analysis of mixture processes. PSICHROMETRY Introduction to the theory of psychrometry. Humid air. Quantification of water vapor content in humid air. Psychrometric charts. Thermodynamic properties of moist air. Analysis of thermal processes involving humid air and respective energy balances. REATIVE MIXTURES Combustion. Stoichiometric combustion and with excess air; flue analysis; enthalpy of formation; adiabatic flame temperature. First and Second Law of Thermodynamics applied to reactive mixtures. Combustion efficiency. |
Theoretical lessons - Distance learning
Topics exposed with power point with resolution of pratical problems;
Theoretical-Pratical lessons - Classroom teaching
Resolution of problems extracted from a book of problems
Weekly lessons - 3h T + 1,5h TP
Laboratory – 3,0h/semester
Total of hours – 75h
Study for examinations – 62h
Students contact (timetable to be defined by each professor).
Designation | Weight (%) |
---|---|
Exame | 60,00 |
Teste | 30,00 |
Trabalho laboratorial | 10,00 |
Total: | 100,00 |
Designation | Time (hours) |
---|---|
Estudo autónomo | 80,00 |
Frequência das aulas | 63,00 |
Trabalho escrito | 7,00 |
Trabalho laboratorial | 12,00 |
Total: | 162,00 |
According to General Evaluation Rules of FEUP
1) a theoretical mini test in the Moodle platform covering the first half of the matter, without consultation, to be done during the semestre, with a weight of 15% in the exam grade.
2) two laboratorial works to be done during the semestre, with a weight of 10% in the final grade.
During the exam time the evaluation will be composed of a mini teste in the Moodle platform covering the second half of the matter, without consultation, with a weight of 15% in the exam grade.
The access to the written exam, that consists of all the matter, with a weight of 60%, requires a minimum grade of 2,00 by summing both of the moodle tests.
Lack of comparency to the theoretical tests, written exame or laboratory works are classified with zero grade.
For other exams, the evaluation will consist of a test in the Moodle platform, covering all the matter, without consultation, with a weight of 30%, and a written exam, covering all the matter with a weight of 60%, depending the access to the written exam, that consists of all the matter, on the minimum grade of 2,00 in the Moodle test. The laboratory works have a 10% grade, and must be obtained during the semestre.
The Moodle tests have a 15 min. duration, and the written exams 90 min.
For all examinations, the students can only take with them the book "Termodinâmica para Engenharia" and tables of thermodinamic properties of substances. The studants that don't have the book can take four pages A4 written with information that the students think is necessary.