MJ1401 Heat Transfer 6.0 credits

Värmeöverföring

  • Education cycle

    First cycle
  • Main field of study

    Mechanical Engineering
    Technology
  • Grading scale

    A, B, C, D, E, FX, F

Course offerings

Autumn 19 for programme students

Autumn 18 for programme students

Intended learning outcomes

After the course, the students should be able to:

  • Identify, formulate and solve problems for different heat transports
  • Analyse, model heat conduction in one-dimensional cases and describe two- and three-dimensional heat conduction and be able to apply them for simple heat conduction problems
  • Analyse and apply empirical correlations in connection with the heat transfer at convection, boiling and condensation
  • Identify, model and calculate the heat transfer at radiation and irradiated surfaces
  • Design heat exchangers of different types

Course main content

One-dimensional cases at stationary conditions.

Differential equations for heat conduction in solid materials.

Solutions for different special cases. Fin efficiency for different fin designs

Two and three-dimensional cases at stationary conditions.

Laplace’s equation. The form factor. Numerical solution methods and analogy methods.

Non-stationary cases. Solutions for flat surfaces and cylinders

Superposition of elementary cases. The "Lumped heat capacity" method.

Numerical solution methods.

Convection, radiation, boiling, condensation and heat exchangers

Velocity and temperature boundary layers.

Theoretical treatment of flow over a flat plate at laminar and turbulent flow.

Reynold's analogy between heat transfer and pressure drop.

Empirical relationships for heat transfer at induced flow

Laminar and turbulent flow in pipes and ducts. Flow around bodies

Velocity profiles and entrance regions Hydraulic diameter

Heat transfer at natural (free) convection, Grashof's number. Boundary layer equations in integral form with solutions for natural convection for vertical plates.

Empirical relationships for laminar and turbulent boundary layers at vertical and horizontal plates, cylinders and slots

Heat transfer at radiation

The "black body" concept. Emission and absorption numbers. Radiant efficiency, angular factor.

Heat transfer at irradiated surfaces

Heat transfer at condensation

Nusselt's theory, condensation on and in horizontal pipes

Heat transfer at boiling

Various types of boiling, the boiling curve

Pool boiling, cooking in pipes and slots

Heat exchangers

Different types, logarithmic mean temperature difference, temperature effectiveness, NTU

Disposition

The course is given during fall semester, 2nd period. The course includes lectures (32 h), exercises (32 h) and four laboratory sessions and three quizzes and an examination. The lectures present the general ideas and theoretical explanations behind heat transfer. In the exercises the theory is applied for different heat transfer problems.

Eligibility

The course MJ1112 Applied thermodynamics or the equivalent

Literature

Yunus A. Cengel; Afshin J. Ghajar; Heat and Mass Transfer, Fundamentals and applications;  Mc Graw Hill companies.

Examination

  • LABB - Lab, 0.5, grading scale: P, F
  • TENB - Exam 1, 5.5, grading scale: A, B, C, D, E, FX, F
  • LAB - Lab, 0,5 grade P,F
  • EXAM - Examination, 5,5 grade: A,B,C,D,E,FX,F

Exam consists of five comprehensive problems. During the course period, three quizzes are given which gives bonus points for exam. Bonus points achieved for the quizzes are valid though out the same academic year only (regular and re-examination).

Language of instruction: Swedish and English

Lectures: Swedish

Exercises: English or Swedish (dependent on the assigned teacher)

Reading list: English

Lab exercise instructions and lab exercises: English

Quizzes and written examination: English

Requirements for final grade

Passed written examination (5.5 credits) and passed four lab exercises (0.5 credits)

Offered by

ITM/Energy Technology

Contact

Rahmatollah Khodabandeh, 790 74 13, rahmat@energy.kth.se

Examiner

Rahmatollah Khodabandeh <rahmatollah.khodabandeh@energy.kth.se>

Supplementary information

Replaces 4A1601

Version

Course syllabus valid from: Autumn 2018.
Examination information valid from: Autumn 2014.