31399 - Energy Systems T

Learning outcomes

The student learns basic knowledge about energy sources, fuels, combustion, and fossil fuel power systems.

Course contents

Requirements/Prior knowledge

A prior knowledge and understanding of Technical Physics, General Physics, Basics of Chemistry, are required to attend with profit this course.

Fluent spoken and written Italian is a necessary pre-requisite: all lectures and tutorials, and all study material will be in Italian.

 

Course Contents

Thermodynamic basics

Ideal gas compression and expansion: isentropic and polytropic work and efficiency, total enthalpy and temperature, speed of sound, polytropic transformations and thermodynamics diagrams.

 

Heat exchanger

Counter-flow, parallel-flow and cross-flow heat exchangers. main design aspects.

Averaged mean logarithmic and effectiveness-NTU methods.

 

Boiler and steam generator

Combustion: stoichiometric oxidation reactions, heating values, energy density, CO2 emission, adiabatic temperature.

Typologies and applications, steam generator efficiency and water circulations.

 

Gas Turbine

Thermodynamic analysis and applications of Brayton and Advance cycles (recuperated, intercooled, reheated, etc.)

Component description: compressors, combustion chamber, expander, etc.

Environmental impact

Advanced gas turbine cycles: recuperator and intercooler

 

Steam power plant

Thermodynamic analysis of steam cycles (Rankine, Hirn, re-heated and regenerative ones).

Component description: steam generator, condenser, steam turbine, cooling systems, etc.

Environmental impact

 

Combined cycle power plant

Thermodynamic analysis of combined cycles with one or more pressure levels

Component description: heat recovery steam generator, condenser, steam turbine, cooling systems, etc.

Environmental impact

Readings/Bibliography

"Sistemi Energetici e macchine a fluido" G: Negri di Montenegro, M. Bianchi A. Peretto, III Edizione – Pitagora Editore

Teaching methods

The lessons are  frontal in the classroom (traditional blackboard).

Teaching is made up of 6CFU, mainly theoretical lessons, with some numerical exercises performed on the main topics of the course: gas turbines, steam power plants and combined cycles. The purpose of numerical exercise is to teach students the units of measurement and the performance of the energy conversion systems in terms of quantity.

Attendance is strongly recommended for better learning of concepts and notions, but does not affect the final evaluation process.

Assessment methods

The assessment methods consist of an oral part lasting about 45 minutes, during which the student must answer two/three questions, covering the entire program.

During the exam is evaluated the student's ability to:

• use the thermodynamic instruments correctly;
• describe their operation;
• theoretically justify their architecture;
• represent their geometry with a free hand sketch;
• evaluate their performance;

The evaluation, expressed in thirtieths, will be higher the more the student is:

• autonomous in articulating responses to the two questions;
• exhaustive in explaining the arguments;
• precise in representing the functionality of the free-hand sketches.

The teaching of Energy Systems T (6 CFU) is one of the two modules that, together with the Fluid Machines T course (6 CFU), constitutes the integrated course of Fluid Machines and Energy Systems T (12 CFU). The vote that will be recorded will be calculated with the arithmetic average of the single votes that the student will have obtained in the two modules. If the result of the average presents the decimal number 0.5, the vote will be rounded in excess. The "30 cum laude" is associated with the number 31. Consequently, in order to obtain the "30 cum laude" final evaluation, the student must be in one of the following two cases:

• have received "30 cum laude" in both modules
• obtaining "30 cum laude" in one form and 30 in the other.

The exam dates are comunicated in advance through the AlmaEsami web platform of the University of Bologna. It is possible to enroll to the exam from 7 to 2 days before the exam date. At the time of the exam the student must carry an identification document.

Teaching tools

Teaching materials: teaching material presented in class will be made available to the student in electronic format via internet (http://campus.unibo.it/ Username and password are reserved for students enrolled at the University of Bologna).

Office hours

See the website of Michele Bianchi