ENERGY EFFICIENCY AND RENEWABLE SOURCES
Learning outcomes of the course unit
The course aims to provide criteria for the evaluation of interventions in the energy field.
To follow the course successfully requires a degree in Mechanical Engineering / Management or equivalent preparation.
Course contents summary
Exergy analysis, thermoeconomic analysis, renewable energy sources.
Exergy analysis. Definition of exergy. Physical exergy. Kinetic exergy. Gravitational potential exergy. Physical exergy of an ideal gas. Chemical exergy of a single ideal gas and of a mixture of perfect gases. Exergy balance for a closed system. Flow exergy associated with heat flow. Destruction of exergy. Exergy balance for the open system in steady state. Unit exergy through the open system. Exergy balance for the open system. Exergy of perfect gas flow. Chemical exergy of fuels. Thermodynamic mean temperature. Exergy destruction caused by friction and by heat transfer. Exergy efficiency.
Thermoeconomics analysis. Cost of energy resources. Capital cost and maintenance. Balance equation of costs. Thermoeconomics parameters. Average cost of product and of fuel. Cost of the destruction of exergy. Relative increase of cost. Exergoeconomic factor. Level of aggregation of the system.
Renewable energy sources. TRNSYS software application to sizing of photovoltaic systems and wind turbines.
A. Bejan, G. Tsatsaronis, M. Moran, “Thermal design and optimization“, John Wiley & Sons, Inc.
Classroom exercises with the use of computer software.
Assessment methods and criteria
The exam consists of a written test and an interview on two separate issues in exergy analysis and thermoeconomics analysis. On examination is also tested the skills acquired on the topics discussed during the workshop activities.