Lecturer:

Course name: Applied Thermo-Fluid-Dynamics
Course code: 503043
Degree course: Ingegneria Elettrica
Disciplinary field of science: ING-IND/10
The course relates to:
University credits: CFU 6
Course website: n.d.

Specific course objectives

The course involve the study of heat transmission by fluids in motion. The aim of the course is to be able to by and large design thermal system components. Theoretical fundaments, analytical and numerical methodologies of the problem are described, with particular reference to engineering applications. In particular the application of mass and energy conservation equations in the field of thermodynamics and fluid dynamics is introduced with reference to cooling and air conditioning systems, applied to relevant problems in the field of thermal systems engineering. The study of fluid motion in ducts is applied to thermal energy transmission between components.

Course programme

Natural and Forced Convection
Physical phenomenon, dimensionless groups and physical interpretation, Buckingham theorem, thermal and hydrodynamic boundary layer, laminar and turbulent flow, empirical correlations (flat plane, cylinder, sphere, ducts and pipes, etc.), applications examples.

Boiling and Condensing Heat Transmission
Boiling flows, forced convention, pool boiling, nucleate boiling, critical heat flux, film boiling, boiling inside tubes, sub-cooled boiling. Film-wise and drop-wise condensation.

Thermal Solar Systems
Solar radiation characteristics and measurements, solar collectors typologies, efficiency, natural and forced circulation, heating and hot water plants, regulation, tanks, overheating. Where and how install a solar system, collectors and tank design, cost factors, technical laws. Software: Solarius and Polysun. Application and examples.

Hydronic Heating Radiant Systems
Characteristics, advantages, and limits, fluid distribution, heating flux, dimensioning. Software: application and examples.

Transient Heat Conduction
Fourier Equation, thermal diffusivity and thermal energy storage, lumped capacitance method , Biot number, temperature distribution, Heisler charts.

Moist Air
Definitions, psychrometric charts and moist air processes.

Air Conditioning Systems
Air conditioning processes, characteristics, advantages, and limits. Air and air+water systems : characteristics, advantages, and limits. How to choose an air conditioning system?

Air Conditioning Systems Components
Humidifiers and dehumidifiers, bypass factor, air emission, ducts and fan, fan characteristics, cooling towers, heat generators, air conditioning systems, heat recovery.

Dehumidification and Humidification
Humidifiers and dehumidifiers: typologies and characteristics (Sauter diameter, saturation efficiency, etc.). Sanitary problems.

Course entry requirements

Basic knowledge of mathematical instruments, Thermodynamics and Heat Transfer.

Course structure and teaching

Lectures (hours/year in lecture theatre): 38
Practical class (hours/year in lecture theatre): 16
Practicals / Workshops (hours/year in lecture theatre): 0

Suggested reading materials

Yunus A. . Thermodynamics and Heat Transfer. McGraw-Hill. .

F. Kreith. Principles of Heat Transfer. Brooks/Cole..

Testing and exams

It is compulsory to perform some practical exercise proposed by the teacher as indicated on the web site and during the course. The exam is both written and oral.