|Abbreviation: TERM II||Load: 45(L)
|Lecturers in charge: ||prof. dr. sc. Ivanka Boras
prof. dr. sc. Antun Galović
|Lecturers: || Alen Cukrov mag. ing. mech.
Martina Rauch mag. ing. mech.
Danijel Zadravec mag. ing. mech.
|Course description: Course objectives:
: Introduction to the basic forms of heat transfer (heat conduction, heat convection and radiation heat transfer), and its application on the calculation of heat exchangers. Introduction to combustion processes using the laws of energy and mass conservation only. Introduction to the behaviour of moist air.
Enrolment requirements and required entry competences for the course:
Attended Thermodynamics I
Regular attendance of lectures and exercizes, as well as regular homework completion will be documented in Script Runner
Grading and evaluation of student work over the course of instruction and at a final exam:
Appropriate attendance of classes (meaning both, lectures and exercises) will constitute 20% of the final mark, while the outcome of the oral and written exam will account for the rest (40% + 40%)
Methods of monitoring quality that ensure acquisition of exit competences:
The attandence and the overall student activity during lectures and exercises will be regularly followed, as well as student"s feedback regarding presented topics received in direct studentteacher communication or via email. Students are encouraged to communicate during and outside lecture/exercises hours. the principles of Thermodynamics II are widely applicable in other related fields and of my (our) interest is the student"s capability to apply their knowledge upon successfully
Upon successful completion of the course, students will be able to (learning outcomes):
Know modes of heat transfer and apply this knowledge to design and optimization of specific heat apparatus particularly heat exchangers
Calculate the thermal losses (gains), in order to optimize the heating or cooling systems
Calculate the transient temperature fields in order to determine the rate of cooling or heating
Completely control and manage the work of furnaces in different energyplants
Understand the processes of air conditioning and drying with air as working fluid
1. Introductory notes. Temperature field and temperature gradient. Fourier"s law. Heat conduction equation for solids.
2. 2. Initial and boundary conditions. Onedimensional steady heat conduction in plane walls. Multilayer plane walls. The thermal resistance concept.
3. Overall heat transfer coefficient. Temperature field in plane walls with heat sources and sinks.) Temperature field with variable heat conductivity of plane wall.
4. Steady heat conduction in cylinders and spheres using the first and third kind boundary conditions. Multilayered cylinders and spheres. Critical radius of insulation of cylinder.
5. Lumped system analysis. Fundamentals of convection heat transfer. Classification of fluid flows. Velocity and thermal boundary layer.
6. Derivation of differential convection equations. Physical properties of fluids. Theorem of similarity.
7. Nondimensional numbers for natural, forced and mixed convection. Film condensation.
8. Drop wise condensation. Boiling heat transfer. Boiling regimes and boiling curve. Fundamentals of thermal radiation. Radiosity. Reflectivity, absorptivity and transmissivity.
9. Black body radiation. Ideal mirror. Planck"s law. StefanBoltzmann"s law. Wien"s displacement law. The radiation of real surfaces.
10. Kirchhoff"s law. Radiation properties of a participating medium. Radiation heat transfer: two near surfaces; two surface enclosures. Protective radiation shields. The view factor and view factor relations.
11. Overall heat transfer coefficient. Heat exchangers. Nondimensional analytical solution for parallel, counter and crossflow recuperators. Special cases. Effectiveness of heat exchangers.
12. Combustion and fuels. Theoretical and actual combustion process.
13. Control of combustion process. Evaluation of the enthalpy of combustion. First law analysis of steady flow combustion. Adiabatic and real flame temperature in steady combustion.
14. Energy combustion losses. Moist air. The intensive properties of the moist air. Processes with moist air: heating, cooling, humidification, dehumidification, mixing.
15. Evaporation. Dalton"s and Lewis"s law. The use of psychrometric chart.
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|1. ||A.Galović: Termodinamika II, FSB, Zagreb, 2010.
|2. ||F. Bošnjaković; Nauka o toplini, Drugi dio, IV. prerađeno izdanje, Tehnička knjiga, Zagreb, 1976.
|3. ||Galović; M.Tadić; B.Halasz: Zbirka zadataka iz Nauke o toplini II, FSB, Zagreb, 1990.
|4. ||Y. A. Cengel: Heat Transfer, A Practical Approach, Second Edition, McGraw - Hill, Boston, 2003.
|5. ||H. D. Baehr, K. Stephan: Waerme und Stoffuebertragung, 6. Auflage, Springer - Verlag, 2008.