Introduction to laws, some heat transfer parameters.
CONDUCTION – Fourier’s law and thermal conductivity.
Differential equation of heat conduction, boundary conditions and initial conditions.
Simple one dimensional steady state situations – plane wall, cylinder, sphere (simple and compex situations), concept of thermal resistance, concept of U, critical radius. Variable thermal conductivity (exercise).
Special one dimensional steady state situations – heat generation, pin fins. Other fin configurations (exercise).
Two dimensional steady state situations.
Transient conduction. Lumped capacitance model. One dimensional transient problems – analytical solutions. One dimensional Heisler charts. Product solutions.
Numerical methods in conduction. Steady state one dimensional and two dimensional problems. One dimensional transient problems – Explicit and implicit.
HEAT EXCHANGERS. Types of heat exchangers, LMTD approach – parallel, counter-flow, multi-pass and cross flow heat exchanger, NTU approach – parallel, counterflow, shell and tube, cross flow heat exchanger.
Condensation and Boiling. Dimensionless parameters, boiling modes, correlations, Forced convection boiling, laminar film condensation on a vertical plate, turbulent film condensation.
Mass Transfer. Analogy between heat and mass transfer, mass diffusion, Fick’s law of diffusion, boundary conditions, steady mass diffusion through a wall, transient mass diffusion, mass convection, limitations of heat and mass transfer analogy.