Course detail
Heat and Mass Transfer
FSI-IPT-A Acad. year: 2022/2023 Summer 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. Condensation. Boiling. Overall heat transfer coefficient. Heat transfer by radiation. Radiative properties of black bodies and real surfaces. Radiative heat transfer between two and more black and grey surfaces.
Language of instruction
English
Number of ECTS credits
5
Supervisor
Department
Learning outcomes of the course unit
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.
Prerequisites
Fundamentals of fluid mechanics (laminar and turbulent flow) and fundamentals of thermodynamics.
Planned learning activities and teaching methods
The course is taught through lectures explaining the basic principles and theory of the discipline. Exercises are focused on practical topics presented in lectures.
Assesment methods and criteria linked to learning outcomes
Course-unit credit requirements: To be allowed to proceed to the main examination, students must have 100% attendance at calculation classes (absence only in justifiable cases, namely health reasons)and passing two mid-term tests. Final/main exam is performed in the form of solution of practical tasks in the total time of up to 4 hours. Final exam is an open type, i.e. use of text books and notes from lectures is allowed. Notes from calculation classes are prohibited. Final grade is calculated as a weighted average of two mid-term grades (each 15%) and final exam grade (70%). Final exam comprises mostly solution of 3 to 4 tasks of various difficulty and corresponding weight in final evaluation.
Aims
The course objective is to provide students with the information on fundamental mechanisms of heat transfer by conduction, convection and radiation and combined modes. The course will provide students with basic knowledge about whether it is realistic to remove or bring a certain amount of heat in a given facility, which the given process needs and under what conditions it can be realized. Students will also be introduced to methods for intensifying heat transfer.
Specification of controlled education, way of implementation and compensation for absences
Homework from calculation class. Two mid-term exams. If students fails to write any of the mid-term exams, they must write alternative exams in the last semester week or are assigned alternative tasks.
The study programmes with the given course
Programme N-ENG-A: Mechanical Engineering, Master's, compulsory
Programme N-ETI-P: Power and Thermo-fluid Engineering, Master's
specialization ENI: Power Engineering, compulsory
Programme N-ETI-P: Power and Thermo-fluid Engineering, Master's
specialization FLI: Fluid Engineering, compulsory
Programme N-ETI-P: Power and Thermo-fluid Engineering, Master's
specialization TEP: Environmental Engineering, compulsory
Type of course unit
Lecture
26 hours, optionally
Teacher / Lecturer
Syllabus
1. Fundamentals of heat transfer and mass transfer. 1D Steady conduction of heat. Internal sources.
2. Conduction-convection systems. Finned surfaces.
3. Unsteady conduction of heat. Lumped capacity method.
4. Semi-infinite bodies.
5. Heat transfer by convection. Boundary layers. Turbulence
6. Heat transfer by convection for bluff body. Tube bundles.
7. Mass transfer – similarity with heat transfer. Evaporative cooling.
8. Forced convection in duct flows.
9. Free convection.
10. Condensation.
11. Boiling.
12. 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.
13. Radiation by gases.
14. Overall heat transfer coefficient. Fundamentals of heat exchanger design. NTU-effectiveness method to the solution of heat exchangers.
Computer-assisted exercise
26 hours, compulsory
Teacher / Lecturer
Syllabus
Calculation of basic energy conservation.
1D steady conduction without and with internal energy sources.
Heat transfer in fins.
1D unsteady (transient) heat transfer (lump capacity method, semi-infinite body).
Fundamentals of convective heat transfër.
Heat transfer by convection for external aerodynamics.
Heat transfer by convection for internal aerodynamics.
Heat transfer by natural convection.
Boiling and condensation heat transfer.
Fundamentals of radiation – view factors.
Radiative heat transfer between two grey surfaces.
Radiative heat transfer between three and more grey surfaces.
Overall heat transfer. Fundamentals of heat exchangers.