Syllabus academic year 2011/2012
Grading scale: TH.
Main field: Technology.
Language of instruction: The course will be given in English on demand.
Alternative for: M3.
Optional for: F4, F4bem, M4bem, M4en.
Course coordinator: Prof Bengt Sundén, Bengt.Sunden@energy.lth.se, Energy Sciences.
Prerequisites: MMVF01 Thermodynamics and Fluid Mechanics or FMFF05 Thermodynamics with Applications.
Assessment: A written exam including theoretical questions and problems to be solved has to be passed at the end of the study period (quarter) vt2. The exam includes 40 % theory and 60 % problem solving. The maximum number of credit points on the exam is 50 p. A problem usually has 10 p. As the theoretical questions are handled closed books prevail. For the problem solving part, the course book and supplied tables are permitted. The exam must therefore be splitted up in two parts. This requires that first the theoretical part is solved with closed books and as soon as this part is finished and handed in to the assistant, the problem solving part can start. The book is then permitted as well as the supplied tables and a pocket calculator. Solved problems are not permitted. To pass the exam with the grade 3, 40 % of the maximum number of credit points are requested. For the grade 4, 60 % is needed while for grade 5, 80 % is required. The home work or assignments concern solving of a few problems from the collection of heat transfer problems and a few theoretical tasks as well as a design task for heat exchangers. Every student must hand in an own solution to every assignment. The teachers will correct and approve the tasks. Incorrect solutions are returned for revision. If all home works or assignments have been handed in and been approved within the actual study period (quarter) 3 bonus points are provided (2 for problems, 1 for theoretical issues). The heat exchanger design task gives another 2 points if approved in time.
Home page: http://www.energy.lth.se.
The course aims to provide the students knowledge and understanding concerning the mechanisms of heat transfer and the methods, analytical and empirical, which are used in the heat transfer subject to determine the amount of heat being transferred and the temperature field. The students should reach ability to apply the theory on engineering problems.
Knowledge and understanding
be able to
For a passing grade the student must
- describe the fundamental mechanisms for heat transfer
- explain the basic and important properties of the subject
- perform analysis and synthesis of problems in heat conduction, convection, thermal radiation, condensation and evaporation
- understand the basic heat exchanger theory
- explain and analyse internal and external laminar and turbulent heat transfer
- understand under what conditions analytical or empirical methods are applicable
Skills and abilities
be able to
For a passing grade the student must
- analyse different heat transfer problems and suggest methods for analysis and synthesis
- judge the uncertainties in the magnitude of heat fluxes and heat transfer coefficients
- critically review chosen methods and results of calculations of heat transfer problems
- participate in discussions and judgement of relevant problems of heat transfer
- to present analysis and synthesis of basic questions of heat transfer both in a wriiten way and orally
The course covers heat conduction, convection, thermal radiation, condensation, evaporation and heat exchangers.
For heat conduction the general theory, extended surfaces and transient heating and cooling processes are included.
For the convective heat transfer the basic equations, similarity laws, forced and natural convection are included. Laminar as well as turbulent cases are studied in internal (ducts) and external (tubes, immersed bodies) flows.
Thermal radiation covers general theory, black and non-black bodies, grey bodies, view factors, radiative exchange between non-black surfaces as well as gas radiation.
The chapter on condensation presents the basic theory on film condensation and influence of essential parameters and the geometry. Introduction to dropwise condensation is provided. The chapter on evaporation concerns boiling, empirical results, two-phase flow and heat transfer, convective boiling and condensation in tubes.
The heat exchanger chapter describes various types of heat exchangers in engineering applications, presents theory and methods for sizing and rating of heat transfer equipment.
Sundén, B, Värmeöverföring, Studentlitteratur, Lund, 2006.
Sundén, B, Exempelsamling i Värmeöverföring. ISRN LUTMDN/TMHP-03/3007-SE;