Course detail
Heat and Mass Transfer
FSI-9PTL Acad. year: 2024/2025 Both semester
The course is concerned with the following topics: Fundamentals of heat transfer and mass transfer. Steady and unsteady conduction of heat. Internal sources. Lumped capacity method. Finned surfaces. Semi-infinite bodies. Heat transfer by convection in boundary layers and duct flows. Free and forced convection. Turbulence. Analogy between heat and mass transfer. Evaporative cooling. Condensation. Boiling. Heat transfer by radiation. Radiosity and irradiation. Radiative properties of black bodies and real surfaces. Radiative heat transfer between two surfaces. Radiative heat transfer between three and more surfaces. Radiation by gases. Overall heat transfer coefficient. Fundamentals of heat exchanger design. NTU-effectiveness method for the solution of heat exchangers.
Language of instruction
Czech
Supervisor
Department
Entry knowledge
Fundamentals of fluid mechanics (laminar and turbulent flow) and fundamentals of thermodynamics.
Rules for evaluation and completion of the course
The exam will consist of a written part and an evaluation of semester tests.
Since it is not obligatory for studentsn to be present at lectures, the presence will not be checked.
Aims
The course objective is to provide students with the information on fundamentals mechanisms of heat transfer by conduction, convection and radiation and combined modes.
Students will learn how to define tasks, boundary and initial conditions and correct physical parameters. They will learn how to employ dimensionless analysis. They will be able to solve real problems like cooling fuel elements, finned tubes and/or cylinders of internal combustion engines, cooling turbine blades, calculate flow rate of condensing liquid, heating by radiation in rooms, etc.
The study programmes with the given course
Programme D-KPI-K: Design and Process Engineering, Doctoral, recommended course
Programme D-ENE-K: Power Engineering, Doctoral, recommended course
Programme D-ENE-P: Power Engineering, Doctoral, recommended course
Programme D-KPI-P: Design and Process Engineering, Doctoral, recommended course
Type of course unit
Lecture
20 hours, optionally
Syllabus
1. General energy conservation equations. 1D Steady conduction of heat. Internal sources. Boundary conditions.
2. Conduction-convection systems. Finned surfaces.
3. Unsteady conduction of heat. Lumped capacity method.
4. Multidimensional unsteady heat condustion. Heissler charts. Semi-infinite bodies.
5. Heat transfer by forced convection. Boundary layers. Turbulence. Heat transfer by convection for bluff body. Tube bundles.
6. Forced convection in pipe flows. Hydrodynamic and thermal entrance regions. Fully developed regimes.
7. Free convection on horizontal, vertical and inclined surfaces. Vertical and inclined cavities.
8. Condensation. Pool boiling. Boiling curve. Critical heat fluxes. Convective boling.
9. Heat transfer by radiation. Radiosity and irradiation. Radiative properties of black bodies and real surfaces.
10. Radiative heat transfer between two surfaces. Concept of radiation network. Radiative heat transfer between three and more surfaces. Reradiating surfaces.