Multiple-pulse-width modulation

Process Heat Transfer

Paper Code: CHE 502

 

Module I
Heat Transfer by Conduction:
Classification of different Modes; Concept of heat diffusion (conduction), Fourier’s Law; Thermal Conductivity – constant and variable; Thermal Diffusivity; Steady State Conduction – Rectangular (Cartesian), Cylindrical and Spherical coordinates; Compound Resistance in Series; Critical thickness of insulation, One dimensional unsteady state heat
conduction, Lumped system analysis, Slab – use of transient temperature chart.

 

Module II
Heat Transfer by Convection:
Concept of convection, General Heat Transfer Equation (Convection-Diffusion), Flow over a body – Hydrodynamic boundary layer, Drag coefficient, Drag force, Thermal boundary layer, Heat Transfer coefficient. Flow inside duct – Thermal boundary layer, Heat Transfer coefficient.
Heat Transfer in Turbulent Region: Dittus-Boelter Equation; Correction for temperature variation over pipe cross section; Physical Interpretation of different Dimensionless groups; Reynolds analogy, Colburn Analogy; Wilson Equation; Natural Convection; Correction of Laminar flow equation for Natural Convection.

 

Module III
Heat Transfer of Fluids with Phase Change:
Introduction; Dropwise and Film-Type Condensation; Coefficients for Film-Type Condensation: Nusselt Equation for Vertical and Horizontal Tubes; Condensation of Superheated Vapors; Heat Transfer to Boiling Liquids: Pool boiling of Saturated Liquid; Film Boiling.

 

Radiation Heat transfer:
Introduction; Monochromatic emissive power; Weins displacement law; Plank’s law of radiation; Kirchoff,s Law; Emissivity of Solids; Absorption of Radiation; Lambert-Beer’s law; Absorption by gases. Radiation between surfaces, Concept of View Factor.

 

Module IV
Heat Exchange Equipments:
Typical Heat Exchange Equipment; Parallel Flow, Countercurrent Flow, and Cross Flow; General Design of Heat- Exchange Equipment; Different types of Heat Exchanger: Double Pipe Heat; Shell and Tube (1-1, 1-2, 2-4); Introduction to Plate Type; Condensers: Shell and Tube;

 

Evaporation:
Introduction; Liquid Characteristics; Types of Evaporator; Performance of tubular evaporator: Capacity, Steam economy; Boiling Point Elevation (Dühring Rule); Outside Heat Transfer Coefficients; Enthalpy Balance for a Single Effect Evaporator; Introduction to Multiple Effect Evaporator: Forward feed, Backward feed, Mixed feed, Parallel feed; Design
concept of Multiple Effect Evaporator.

 

Text Books:

  1. Heat Transfer – A Basic Approach: M. Necati Ozisik, McGraw-Hill International Edition, Singapore (1985)
  2. Fundamentals of Heat and Mass Transfer: Frank. P. Incropera and David. P. Dewitt, Wiley, 4th Ed.
  3. Units Operations of Chemical Engineering: McCabe & Smith and Harriot, MGH, 5th Edn.
  4. Heat Transfer, B. K. Dutta, PHI
  5. Process Heat Transfer: D. C. Kern : MGH.
  6. Heat Transfer,Long,Pearson Education

References:

  1. Coulson & Richardson: Chemical Engineering (IV)
  2. Process Heat Transfer: Y.V.C. Rao