OVERVIEW

The module focuses on the study of power plants for energy production, in particular the ones based on the gas turbine technology and natural gas combined cycles, analysing their performance, also in off-design conditions, in the actual Italian energy scenario.

AIMS AND CONTENT

LEARNING OUTCOMES

The main goal of this course is the presentation of the gas turbine technology and related cycles. In particular attention will be posed on advanced gas turbine cycles, combined cycles, mixed cycles with particular emphasis on design and off-design operations. Some thermoeconomic aspects will be investigated taking into account the economic scenario of the energy market. For gas turbines detailed investigation of blade cooling design and influence on the whole cycle are presented. Also combustors operation and related environmental impacts are presented and discussed, including the emission reduction techniques used in land based gas turbine cycles. Some considerations on low BTU gas utilization are considered in the course.

AIMS AND LEARNING OUTCOMES

At the end of the course, the student will be able to:

- know the operating principles of the power plants in the current European and Italian energy scenarios. 

- explain the off-design performance of power plants and gas turbines.

- analyse the performance of combined cycle plants, including cogenerative ones, referring to the different energy markets.

- evaluate the main critical aspects in the start-up and management of combined cycle power plants.

TEACHING METHODS

The corse is based on lectures; some practical activities are considered such as the evaluation of GT based cycle performance using in house code (WTEMP); moreover, an experimental activity is planned at the Savona Lab. where a complex MGT test rig is installed. 

SYLLABUS/CONTENT

- The electrical system in Italy: main players, production,  
transmission, distribution and consume of electrical energy. Italian  
electrical system evolution.
- electricity markets in Italy: creation of the electrical market,  
market typologies, price determination mechanisms. Day Ahead Market  
(MGP), Intra-day Market (MI) and Market for Despatchment Services (MSD).
- Combustion chambers: emissions and control.
- Blade cooling and TIT limits, blade cooling flow rate calculation.
- Combined Cycles: heat recovery steam generator; one, two three  
pressure levels HRSG with or without re-heating; HRSG once through  
solution; post-combustion; combined cycle control using IGV and  
constant TOT; flexibility operation of combined cycle. Mixed steam-gas  
cycles: STIG and Cheng cycles; HAT cycle; advanced mixed cycles.
- Off-design operation of single and two shaft gas turbine based  
cycles; start up and shut down of gas turbine plants.
- High Efficiency Cogeneration and application to gas turbines and  
combined cycles.
- Seminars:
• Ing. Galliani – ARERA: The recent evolution in the energy production  
mix in Italy and effects on the system.
• Ing. Galliani – ARERA: MSD evolution and pilot projects.
• Prof. Ing. Sorce – UNIGE: combined cycles flexibility.

RECOMMENDED READING/BIBLIOGRAPHY

Lozza G, Turbine a gas e cilci combinati, Pitagora ed.

Cohen-Rodgers-Sarvanamuttoo, Gas Turbine Theory, Ed.

TEACHERS AND EXAM BOARD

Exam Board

MARINA UBALDI (President)

DARIO BARSI

MARIO LUIGI FERRARI

MASSIMO RIVAROLO

FRANCESCA SATTA

DANIELE SIMONI

ALESSANDRO SORCE

ALBERTO TRAVERSO

ARISTIDE MASSARDO (President Substitute)

LESSONS

LESSONS START

https://corsi.unige.it/9270/p/studenti-orario

Class schedule

The timetable for this course is available here: Portale EasyAcademy

EXAMS

EXAM DESCRIPTION

The final exam is only oral.

ASSESSMENT METHODS

Discussion of two topics of the course. The student must prove the knowledge of the main concepts and their practical application. The level of knowledge, the capacity of analysis and the clarity in the exposition will be evaluated during the exam. 

Exam schedule

FURTHER INFORMATION

Pre-requisites :

No pre-requisites are requested.