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 | 235 | 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 - Topics exposed with power point with resolution of pratical problems; Theoretical-Pratical lessons: 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 (%) |
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Exame | 60,00 |
Teste | 30,00 |
Trabalho laboratorial | 10,00 |
Total: | 100,00 |
Designation | Time (hours) |
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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
The evaluation consists of: two theoretical mini-tests to be carried out on the Moodle platform (without consultation), each with a part of the syllabus to be held on dates to be established during the semester and with an individual weight of 15% in the final score (twenty values); a written examination to be carried out at the end of the semester encompassing all the syllabus with a weight of 60%; evaluation resulting from the laboratory work with a weight of 10% of the final mark. The access to the final written examination, which covers all subjects, requires an average grade of at least 2.0 values obtained in the set of two mini-tests carried out in the Moodle platform. The lack of attendance to the Moodle tests, to the written examination are classified with zero values. The appeal evaluation will be composed of a theoretical test in the Moodle platform including all the syllabus, with a weight of 30%, and a written practical test, which covers all the material, weighing 60%. The access to written proof of resource requires a minimum grade of 2.0 values in the Moodle resource test. The evaluation rules are identical for workers with TE status, or any other status, taking their tests on the same days and hours as those of regular students. This means that only students with any status who have had a mean of 2.0 values in the Moodle tests of each period will have access to the written test. Improvement of classification or proof of approval to be taken at the time of appeal, outside of the same or other examination periods: the same evaluation rules apply at the time of appeal, ie, a Moodle test with a weight of 30% and a written test weighing 60%, and the written test requires a minimum grade of 2.0 in the Moodle test. All tests in Moodle have a duration of 15 min. and written exams have a duration of 2.0h. In written exams, students may consult, in addition to the thermodynamic tables, the reference text book adopted in the UC, or alternatively they may take 4 A4 sheets with written notes |
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.