Study-unit MACHINE

Course name Mechanical engineering
Study-unit Code 70300012
Curriculum Generale
Lecturer Gianni Bidini
CFU 12
Course Regulation Coorte 2017
Supplied 2019/20
Type of study-unit Obbligatorio (Required)
Type of learning activities Attività formativa integrata
Partition

MODULE A

Code 70074205
CFU 6
Lecturer Gianni Bidini
Lecturers
  • Gianni Bidini - Didattica Ufficiale
Hours
  • 54 Hours - Didattica Ufficiale - Gianni Bidini
Learning activities Caratterizzante
Area Ingegneria energetica
Sector ING-IND/08
Type of study-unit Obbligatorio (Required)
Language of instruction Italian
Contents Teaching units: Volumetric engines
Reciprocating internal combustion engines: two and four-stroke engines. Limit cycle and ideal cycle for spark-ignition and spontaneous engines. Real cycle. Indicate diagram. Load factor. Expression of the torque and power. Carburetion and fuel injection. Detonation. Fuels. Supercharging. Wankel engine. Stirling Engine.
Teaching units: Energy Systems
Teaching Subunit: External combustion plants
Steam turbine engine plants. Simple cycles and improved. Regeneration. Steam plants components: condensers, degasser, regenerative heat exchangers. Steam generators: constructive solutions, heat exchange. Energy losses in steam generators. ORC.

Teaching Subunit: Gas-steam combined cycles
Gas-steam combined cycle: post-combustion and recovery solutions. Recovery and post-combustion boilers. Single and double pressure level recovery boilers. Optimization of the connection between gas cycle and steam cycle.

Teaching Subunit: Electrical and thermal cogeneration system
Electrical and thermal cogeneration system. Applications to different engine plants: backpressure steam turbine or pressure controlled extraction turbines, gas turbines, reciprocating internal combustion engines.

Teaching Subunit: Hydroelectric plants .
Run of the river hydroelectric plants. Hydroelectric dam. Pumped-storage plants. Tidal power station.
Reference texts G. Bidini Macchine 2 Macchine volumetriche, Il Formichiere 2018
G. Bidini Macchine 3 Sistemi energetici, Il Formichiere 2018
G. Bidini Macchine 4 Impianti idroelettrici, cogenerazione e cicli combinati, Il Formichiere 2018
Educational objectives Teaching is the first course systems and components of energy systems

The main goal of education is to provide students with the foundation for the design analysis and verification of operation of components and energy systems

The main knowledge acquired will be:

Reciprocating internal combustion engines: two and four stroke engines. Ideal cycle and limit cycle for spark ignition or spontaneous. Real cycle. Diagram of the indicator. Filling coefficient. Expression of torque and power. Carburetion and injection. Detonation. Fuels. Overfeeding. Wankel engine. Stirling engine

Turbomachinery. Basic equations of fluid dynamics. Blading and phenomenology efflux. Turbine: fluid nozzle expansion and bands rotor and stator; degree of reaction; performance; effect of moisture of steam; turbine pressure jumps and speed; three-dimensional effects; adjustment of the turbines. Gas turbines. Outline of hydraulic turbines. Axial and centrifugal compressors. Hydraulic machines (pumps). Cavitation in pumps

External combustion plants: Plants steam turbine engines. Simple cycles and improved. Regeneration. Parts of steam systems: condensers, degassing, regenerative heat exchangers. Steam generators: construction types, heat energy losses in steam generators. ORC

Gas turbine power plants. Simple cycle (Joule) ideal and real. Cycle regenerated. Cycles with compression intercooled and / or after combustion. Ericsson cycle. The steam injection in gas turbines. Aircraft engines

Combined cycle gas-steam recovery solutions and post-combustion. Recovery boilers and with post-combustion. Recovery boilers single and dual pressure level. Optimization of the coupling between gas cycle and steam cycle.

Cogeneration of electricity and heat. Applications to different power plants: turbines pressure steam or bleed, gas turbines, internal combustion engines, alternative
Hydroelectric plants: Plant-river. Plants in the basin. Pumping systems. Wave power

The main skills (ie the ability to apply the knowledge acquired) will be:
analyze a cycle compression ignition engine or ignition
sizing and verify the principal parameters of a plant with a steam turbine in different operating conditions
analyze the functioning of the most common cogeneration systems
dimensioning and check the models of production systems of hydroelectric energy
Prerequisites In order to understand and know how to apply most of the techniques described in teaching need to have successfully supported the examination of Technical Physics.
In addition, other topics covered in the module requires to have the ability to solve simple mass balance and energy and the ability to solve simple integrals and derivatives.
Teaching methods The course is organized as follows
Lectures on all the topics of the course
Lessons in laboratories machines (cogeneration, biomass, fuel cells, internal combustion engines, alternative). Students will be divided into groups (maximum 20 students per group) and will follow four specific lessons of 1.5 hours each
Other information Frequency is recommended
Learning verification modality The exam includes an oral and / or written test. The oral exam in a discussion lasting about 30 minutes aimed at ascertaining the level of knowledge and the understanding reached by the student on the theoretical and methodological implications listed in the program (internal combustion engines, turbo machinery, energy systems). The oral exam will also test the ability of communication with the student of language and autonomous organization of the exposure on the same topics in theoretical content. The written Consite in the solution of two / three problems in computational nature and / or size of the plant and / or multiple-choice questions and / or open technical content and methodology of the program. The test has a duration of not more than 3 hours and is designed to test the ability to correctly apply the theoretical knowledge, the understanding of the issues proposed and the ability to communicate in a written
The test may also include, in addition to the high proof, nice discussion of a case study proposed by the teacher as a laboratory to one or more tests, carried out as a project carried out individually or in groups. In the discussion will explain the issues raised in the case assigned, the alternatives to the project, any regulatory environment, the methodology adopted, the analysis of the results obtained. The discussion can take advantage of a written report or about 10 slides and predict the demand for theoretical study and clarification of detail by members of the examination committee.
The evidence as a whole allows us to ensure both the ability of knowledge and understanding, and the ability to apply the acquired skills and the ability to display, and the ability di apprendere and process solutions for independent judgment
Extended program Volumetric engines
Reciprocating internal combustion engines: two and four-stroke engines. Limit cycle and ideal cycle for spark-ignition and spontaneous engines. Real cycle. Indicate diagram. Load factor. Expression of the torque and power. Carburetion and fuel injection. Detonation. Fuels. Supercharging. Wankel engine. Stirling Engine.
External combustion plants
Steam turbine engine plants. Simple cycles and improved. Regeneration. Steam plants components: condensers, degasser, regenerative heat exchangers. Steam generators: constructive solutions, heat exchange. Energy losses in steam generators. ORC.

Gas-steam combined cycles
Gas-steam combined cycle: post-combustion and recovery solutions. Recovery and post-combustion boilers. Single and double pressure level recovery boilers. Optimization of the connection between gas cycle and steam cycle.

Electrical and thermal cogeneration system
Electrical and thermal cogeneration system. Applications to different engine plants: backpressure steam turbine or pressure controlled extraction turbines, gas turbines, reciprocating internal combustion engines.

Hydroelectric plants .
Run of the river hydroelectric plants. Hydroelectric dam. Pumped-storage plants. Tidal power station.

MODULE B

Code 70074304
CFU 6
Lecturer Linda Barelli
Lecturers
  • Linda Barelli - Didattica Ufficiale
Hours
  • 54 Hours - Didattica Ufficiale - Linda Barelli
Learning activities Caratterizzante
Area Ingegneria energetica
Sector ING-IND/08
Type of study-unit Obbligatorio (Required)
Language of instruction Italian
Contents Detailed study of turbomachinery with gas/steam (compressors, turbines) and liquid working fluids (pumps, hydraulic turbines)

Study of gas turbines plants and steam turbines plants
Reference texts Gianni Bidini, Macchine 1 - Turbomacchine, Edizioni Anteo

Gianni Bidini, Macchine 3 - Sistemi Energetici, Edizioni Anteo
Educational objectives skill in turbomachinery design depending on operative conditions and working fluid. Skill in compressor/pump/turbine/hydraulic turbine choice and its implementation in the related circuit. Skill in design of gas turbine and steam turbine energy conversion plants; evaluation of their performance according to design parameters
Prerequisites Fisica Tecnica
Teaching methods face-to-face and numerical training
Other information --
Learning verification modality written and oral exam
Extended program TURBOMACHINERY

- Introduction to turbomachinery

- Foil energy analysis

- Multi-stage turbomachinery

- Turbines

- Hydraulic turbines

- Compressors

- Pumps

- Losses and tridimensional effects in turbomachinery

ENERGY CONVERSION PLANTS

- Thermodynamics (entropy, exergy, exergy balance; compression and expansione and their exergy efficiency)

- Gas turbine cycles

- Gas turbines layouts

- gas turbine engines for aeronautic propulsion

- STIG cycle

- Steam turbine plants and related cycle

- Thermal regeneration in steam turbine plants