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 knowledge of the contents of the courses of Applied Physics
Course contents summary
Exergy analysis and thermoeconomic analysis
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. Exergy of industrial fuels. Irreversibility in the combustion process.
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.
Exergy analysis of the steam turbine and gas turbine plant, of the refrigeration plant, of the cogeneration plant, of the air liquefaction plant.
Exergy analysis of the thermal energy storage.
A. Bejan, G. Tsatsaronis, M. Moran, “Thermal design and optimization“, John Wiley & Sons, Inc.
Assessment methods and criteria
The exam is based on an oral test preceded by a written test, in which the exergy analysis and the thermoeconomic analysis of a complex system, however described in macroscopic terms, are required. The resolution of the proposed problem without serious conceptual mistakes constitutes a constraint of admission to the oral exam, in which the correct and complete response to theoretical questions and the exposure property are evaluated. Nor texts, nor lesson notes can be used during the tests. The outcome of the written test is communicated immediately after the correction, usually within one or two days, via e-mailed communication to the students registered for examination. The final vote is communicated immediately at the end of the oral test, before its registration. The praise is added in case of excellent score in each item (written test and oral exam) and in case of particular communicative and speaking ability with reference to the specific field.