HEAT TRANSFER

GUJARAT TECHNOLOGICAL UNIVERSITY

BACHELOR OF ENGINEERING

SUBJECT CODE:- 2151909

SUBJECT NAME:- HEAT TRANSFER

B.E 5th SEMESTER

1. Fundamental:- Modes of heat transfer, effect of temperature on thermal conductivity of different solids, liquids and gases, derivation of generalized equation in Cartesian, cylindrical and spherical coordinates and its reduction to specific cases, General laws of heat transfer.
2. Conduction:- Fourier’s law, One dimensional steady state conduction, heat conduction through plane and composite walls, cylinders and spheres, electrical analogy, critical radius of insulation for cylinder and sphere, overall heat transfer coefficient.                                                                                                                                                                                                        Transient heat conduction:- lumped heat capacity analysis, time constant, transient heat conduction in solid with finite conduction and convective resistances.                                                                                                                                                              Heat transfer from extended surface:- Types of fin, heat flow through rectangular fin, infinitely long fin, fin insulated at the tip and fin losing heat at the tip, efficiency and effectiveness of fin, Biot number, Estimation of error in temperature measurement in a thermometer well.
3. Convection:- Newton’s law of cooling, dimensional analysis applied to forced and free convection, dimensionless numbers  and their physical significance, empirical correlations for free and forced convection, continuity, momentum and energy equation, thermal and hydrodynamic boundary layer, Blasius solution for laminar boundary layer, General solution for Von-Karman integral momentum equation
4. Radiation:- Absorptivity, reflectivity and transmissivity, black, white, and grey body, emissive power, emissivity, laws of radiation- Planck, Stefan-Boltzmann, Wein’s displacement, Kirchhoff’s law, intensity of radiation and solid angle, Lambert’s cosine law. Radiation heat exchange between black bodies, shape factor, heat exchange between non-black bodies- infinite parallel planes and infinite long concentric cylinders, radiation shield, heat exchange between two grey surfaces, electrical analogy.
5. Heat exchanger:- Classification, heat exchanger analysis, LMTD for parallel and counter flow exchanger, condenser and evaporator, overall heat transfer coefficient, fouling factor, correction factors for multi pass arrangement, effectiveness- NTU method for parallel and counter flow heat exchanger, introduction of heat pipe and compact heat exchanger.
6. Two -phase heat transfer:- Boiling of liquids, Pool boiling curve, different types of pool boiling, condensation of vapor, Film wise & drop wise condensation.