Unit 1 Steady State Conduction Heat Transfer

10 lecture hours

• Fourier’s law of heat conduction
• effect of temperature on thermal conductivity of metals
• refractory and building materials
• liquid and gases
• derivation of generalized equation in Cartesian coordinates and its reduction to specific cases
• three dimensional heat conduction equations in cylindrical and spherical co-ordinates One dimensional steady state conduction
• heat conduction through plane and composite walls
• hollow and composite cylinders
• hollow and composite spheres
• electrical analogy
• overall heat transfer coefficient Critical thickness of insulation
• Transient heat conduction: lumped capacitance method for bodies of infinite thermal conductivity
• time constant
• one dimensional transient heat conduction in plane wall with finite conduction and convective resistances

Unit 2 Heat Transfer Extended Surface

6 lecture hours

• : 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

Unit 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
• momentum and energy equations
• thermal and hydrodynamic boundary layer
• Blasius solution for laminar boundary layer
• General solution for Von-Karman integral momentum equation 07 Subject Code: 3170102 w.e.f

Unit 4 Radiation

10 lecture hours

• reflectivity and transmissivity
• white and grey body
• emissive power and emissivity
• laws of radiation – Planck
• Stefan- Boltzmann
• Wein’s displacement
• 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
• radiation shield
• heat exchange between two grey surfaces
• electrical analogy

Unit 5 Heat Exchangers

8 lecture hours

• 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 and number of transfer unit for parallel and counter flow heat exchanger
• introduction to heat pipe
• compact heat exchangers

Unit 6 Two-phase heat transfer

4 lecture hours

• Boiling and Condensation*: Boiling of liquids
• Pool boiling curve
• modes of pool boiling
• correlation for pool boiling
• condensation of vapor
• film wise and drop wise condensation
• condensation on flat surfaces and horizontal tubes