70/LM-0098 - RENEWABLE ENERGY TECHNOLOGIES
Academic Year 2021/2022
Free text for the University
DANIELE COCCO (Tit.)
- Teaching style
- Lingua Insegnamento
|[70/84] ENERGETIC ENGINEERING||[84/00 - Ord. 2018] PERCORSO COMUNE||6||60|
|[70/85] MECHANICAL ENGINEERING||[85/00 - Ord. 2019] PERCORSO COMUNE||6||60|
According to the educational objectives of the Master Degree, the specific educational objectives of the course are to give specialized skills in the field of energy conversion systems based on the use of renewable energy sources.
The main learning outcomes of the Renewable Energy Technologies course are as follows:
Knowledge and understanding
• Achieve the basic knowledge about the structure of the national energy system and about the grants for energy production from renewable sources.
• Achieve the basic knowledge about the main characteristics of wind, solar radiation, hydraulic resources and chemical-physical properties of biomass.
• Achieve the basic knowledge on the fundamentals of wind farms, hydroelectric, solar and biomass power plants.
• Achieve the basic knowledge on the system configurations and performance provided by wind farms, hydroelectric, solar and biomass power plants.
• Achieve the basic knowledge on the environmental impact produced by renewable power plants.
Applying Knowledge and understanding
• Achieve the ability to analyze the results of experimental data of wind speed, hydraulic resources and solar radiation for the purpose of evaluating the energy potential of a site.
• Achieve the ability to perform the preliminary design of a solar thermal plant, a photovoltaic system and a concentrating solar plant according to the user requirements.
• Achieve the ability to perform an economic preliminary evaluation for a power generation plant using renewable sources.
• Achieve the ability to find technical and cost data from the equipment suppliers in order to perform a comparative assessment (qualitative and quantitative) between different energy conversion systems based on renewable sources.
• Achieve the ability to sketch the scheme of a renewable energy power plant and to describe the corresponding operation procedures.
• Achieve the ability to write a technical report about the design process of a renewable power plant.
• Achieve the ability to integrate the knowledge with that of the other courses in order to achieve a general learning in the field of energy conversion systems. The course will also allow to consolidate the skills required by PhD or other master courses as well as for the professional training.
A profitable study of the renewable energy technologies course requires a suitable knowledge of math (algebra, derivative and simple integrals), thermodynamics, and the basics of fluid machines and energy conversion systems. Fundamentals of fluidodynamics, chemistry and electrical engineering is also useful.
There are no formal prerequisites with other courses.
1. Basic Concepts (4 hours lecture, 2 hours lab) . Energy sources and energy production. Classification of renewable energy sources . The legislation in the field of energy and environment. The electricity market, grants for energy production from renewable sources. Economic analysis applied to energy production from renewable sources.
2. Wind Power Systems ( 8h lesson , exercise 4h ) . Wind characteristics , frequency distribution , wind shear. Maximum power of a wind turbine, Betz limit. Wind converters. Power coefficient of a wind turbine. Constructive aspects and control system of a wind turbine. Wind farms and offshore turbines. Annual electricity production. Installation cost and profitability. Environmental impact of wind turbines.
3. Solar Energy (15h lecture, tutorial 8h ). The energy balance of the Earth. Solar radiation. Evaluation of the global radiation to the ground and on sloping surfaces . Solar thermal . Characteristics and performance of solar collectors. Methodology for the design of a hot water production system. Concentrating Solar Power . Classification and characteristics of CSP plants . Classification of concentrating solar collectors, heat transfer fluids and power section. Concentration ratio, solar multiple and heat storage capacity. Design methods for CSP plant . Solar photovoltaics. Features , performance and applications of photovoltaic systems . Preliminary design of a photovoltaic system.
4. Hydropower (6h lecture, tutorial 4h ). Characterization of water resources and assessment of their potential . Introduction and classification of hydropower plants. Pumping power plants. Performance and design features. Civil works and electromechanical equipment. Installation cost and profitability. Environmental impact of hydroelectric power plants. Methods of utilization of the energy of tides, currents and waves for electricity production.
5. Energy from Biomass (6 hours lecture, 2 hours lab). Classification, availability and use of biomass. The biomass energy conversion technologies. Production of electricity and thermal energy through direct combustion systems. Steam power plants, biomass boilers and innovative technologies. Anaerobic digestion plants and biomethane production. Environmental, economic and social features concerning the energy use of biomass.
6. Energy storage (1 hour lecture). Classification and main features of energy storage technologies
The course has a total duration of 60 hours, 40 hours of lectures and 20 hours of practical exercises. On the basis of the “Manifesto degli Studi” of the University of Cagliari, the course will be done mainly with classroom lectures, integrated with online tools, according to the decisions of the University management. The discussion of plant schemes and figures will be done with the use of Power Point presentations. The practical exercises are solved in the classroom by the teacher and concern the design and the performance evaluation of the different renewable energy systems. For each topic, the teacher will assign to the students a specific homework which includes practical problems about the different renewable energy technologies, which represents the basis for the oral discussion during the final examination.
Verification of learning
The final examination is based on an oral examination.
The oral examination consists of a discussion of the exercises carried out by the student and submitted to the teacher. The discussion concerns also on the characteristics and performance of the different renewable energy technologies.
The final mark depend on the marks of the homework (30%) and oral examination (70%).
For the evaluation of the homework the following criteria are applied: a) suitability of the solution process, b) suitability of assumptions, c) Correctness of calculations, d) Effectiveness of ghaphics and discussion of results.
The mark of the oral examination test is reported on a 30 basis. The rank of 18/30 is assigned for an elementary level of knowledge/ability while the rank of 30/30 is assigned for an excellent level of knowledge/ability.
The following criteria are applied for the evaluation of the oral examination: a) Correctness and completeness of answers, b) Analysis of the problem, c) language skills , d) Effectiveness of presentation. Criteria a) and b) are strictly required to pass the examination.
D. Cocco, P. Puddu, “Tecnologie delle energie rinnovabili” SGE editoriali Padova 2016.
“Wind Turbines”, E. Hau; Springer Verlag, 2000 e “Sistemi eolici”, R. Pallabazzer, Rubettino, 2004 (point 2 of the course contents);
“Ingegneria Solare”, M. Cuccumo, V. Marinelli, G. Oliveti; Pitagora 1994 e “Solar engineering of thermal processes”, Second edition, J. A. Duffie and W. A. Beckman, John Wiley & Sons INC 1991 (point 3 of the course contents);
“Guida all’idroelettrico minore”, Manuale ESHA; U.E. Report 1998, “Elementi di Macchine. Le turbine idrauliche”, C. D’Amelio, Fridericiana Editrice Università, Napoli 2001 (point 4 of the course contents);
“Biomasse per l’energia – Guida per progettisti, impiantisti e utilizzatori”, ISES Italia, 2004 (point 2 of the course contents);
G. Genta, "Kinetic Energy Storage, Theory and Practice of Advanced Flywheel Systems", Butterworths, London, 1985 e I. Dinçer, M. A. Rosen "Thermal Energy Storage Systems and Applications", John Wiley and Sons, Ltd., 2011 2004 (point 2 of the course contents)
All the material presented during the lectures and tutorials, as well as the texts of the exercises proposed to the students, the schedule of the oral examinations is available on the website of the teacher and/or on the course Team.