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SYLLABUS

UNIT-I

Introduction, Basic modes of heat transfer – Fundamental laws of heat transfer – Simple general discussion about applications of heat transfer. Conduction heat transfer Fourier heat transfer equation – General heat conduction equation in Cartesian, Cylindrical and Spherical coordinates – Simplification and forms of the field equation – Steady, Unsteady and periodic heat transfer – Initial and boundary conditions.

UNIT-II

One dimensional steady state conduction heat transfer Homogeneous slabs, Hollow cylinders and Spheres – Composite systems – Overall heat transfer coefficient – Electrical analogy – Critical radius of insulation – Variable thermal conductivity – Systems with heat sources of heat generation extended surface and fins. One dimensional transient conduction heat transfer Systems with negligible internal resistance – Chart solutions of transient conduction systems.

UNIT-III

Convective heat transfer Classification of systems based on causation of flow, Condition of flow, Configuration of flow and medium of flow – Dimensional analysis as a tool for experimental investigation – Buckingham p theorem and method, application for developing semi – empirical non-dimensional correlation for convection heat transfer – Significance of non-dimensional numbers – Use of empirical correlation for convective heat transfer. Forced convection : External flows : Flat plates and horizontal pipes. Free convection : Vertical plates and pipes-concepts about hydrodynamic and thermal boundary layer along a vertical plate.

UNIT-IV

Heat transfer with phase change Boiling Pool boiling – Calculations on nucleate boiling, Critical heat flux and film boiling. Condensation Film wise and drop wise condensation – Film condensation on a vertical and horizontal cylinders using empirical correlations. Radiation heat transfer Emission characteristics and laws of black-body radiation – Irradiation – Total and monochromatic quantities – Laws of Planck, Wien, Kirchoff, Lambert, Stefan and Boltzmann – Heat exchange between two black bodies – Concepts of shape factor – Emissivity – Heat exchange between grey bodies – Radiation shields – Electrical analogy for radiation networks.

UNIT-V

Heat exchangers Classification of heat exchangers – Overall heat transfer coefficient and fouling factor – Concepts of LMTD and NTU methods – Problems using LMTD and NTU methods.