Heat Transfer Equipment

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Department of Process Engineering

Synopsis:

Fundamentals of thermodynamics and conductive and convective heat transfer. Enthalpy balancing. Technical thermodynamics and basic thermodynamic cycles. Functional description, mechanical design, thermal and hydraulic design of a heat exchangers, evaporators and driers. Combustion and combustors and furnaces.

Requirements:

Syllabus of lectures:

1. Thermodynamics fundamentals. State variables, internal energy, First law of thermodynamics, enthalpy, entropy and the second law of thermodynamics. Balancing of continuous system. Thermodynamic diagrams. Basic thermodynamic cycles.

1. Isobaric and isoenthalpic processes, Joule-Thomson effect in real gases. Application of JT effect for liquefaction of gases in Linde process (kryogenics). Enthalpic balances

3. Mechanisms of heat transfer. Conduction, convection (heat transfer coefficients) and radiation. Fourier's law of conduction, thermal resistance. Unsteady heat transfer, penetration depth. Biot number. Convective heat transfer, heat transfer coefficient and thickness of thermal boundary layer. Heat transfer in a circular pipe at laminar flow. Criteria: Nu, Re, Pr, Pe, Gz. Heat transfer in turbulent flow, Moody's diagram. Effects of variable properties (Sieder Tate correction for temperature dependent viscosity). Noncircular profiles and equivalent diameter of pipe. Heat transfer at outer flows around sphere, cylinder and pipe bundle.

4. Heat exchangers. Mechanical design of HE. Enthalpy balance of HE, temperature profiles in co-current flow and counter-current flow HE.

5. Heat transfer at phase changes (boiling and condensation). Evaporation and evaporators. Powerpoint presentation of evaporators (falling, climbing film, multiple effects, vapour recompression).

6. Drying and dryers. Powerpoint presentation (convective and contact dryers, lyofylization, fluidized bed and spray dryers). Properties of drying air (Mollier diagram, dew point, wet bulb temperatures) and dried material (moisture, sorption isotherms). Mass and enthalpy balance. Kinetics of drying. Drying experiments. First and second stage of drying.

Syllabus of tutorials:

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Further information:

No time-table has been prepared for this course

The course is a part of the following study plans: