**CHE 302: Heat and Mass Transfer Operations** (4)

*Learning Objectives*:

Heat transfer operation will give the basic ideas of heat flow via three modes, *viz*. conduction, convection and radiation. The principle mechanism of these three modes of heat flow and their applications in industrial problems will be covered. While, Mass Transfer operation will offer the fundamental concepts of mass transfer through diffusive and convective mass transfer, interphase mass transfer and application of these concepts to real engineering problems using distillation and absorption.

*Course Contents*:

**Part I (Heat Transfer Operations): **Basic modes of heat transfer, Conduction: principles and basic equations of 1D, 2D and 3D conduction, Fourier's law, steady state heat transfer through composite slabs, composite cylinders and sphere; Critical thickness of insulation, Fin effectiveness and efficiency, Lumped parameter approach and significance of time constant. Convection: natural and forced convection, hydrodynamic and thermal boundary layers, Individual & overall heat transfer coefficient, log-mean temperature difference (LMTD), Empirical equations for free and forced convection, Types of heat exchangers and related problem in industries, LMTD method, effectiveness-NTU method; Radiation: black body and gray body radiation, Laws of black body radiation, Evaporation: basic concepts of vaporization, single & multiple effect evaporators.

**Part II (Mass Transfer Operations):**Concepts of molecular diffusion and mass transfer coefficient; introduction to multi-phase systems; vapor pressure; humidity and saturation; ideal and non-ideal mixtures; interphase mass transfer; batch distillation; Ponchon-Savarit and McCabe-Thiele analysis of binary distillation, introduction to multi-component distillation, approximate and plate to plate calculations for multi-component distillation, equilibrium solubility of gases in liquids; counter-current multi-stage absorption, types and nature of adsorption, triangular diagram of extraction; liquid-liquid extraction; single and multistage leaching operation, equipment for leaching, crystallizers and crystallization, application of membrane in liquid & gas separation processes (microfiltration, ultra-filtration, nano-filtration, reverse osmosis).

**Selected Readings**

- W.L. McCabe, J. Smith and P. Harriot,
*Unit Operations of Chemical Engineering*, 6th Ed., McGraw - Hill, International Edition, 2001. - B.K. Dutta,
*Principles of Mass Transfer and Separation Processes*, 1st Ed., Prentice Hall of India, 2007.

**:***Reference Books*- T.L. Bergman, A.S. Lavine, F.P. Incropera, D.P. Dewitt, Fundamentals of Heat and Mass Transfer, 7th Ed., John Wiley & Sons, 2011
- B.K. Dutta,
*Heat Transfer*, Prentice Hall of India, 2001. - J.P. Holman,
*Heat Transfer*, 8th Ed., McGraw - Hill, 1997. - D.Q. Kern,
*Process Heat Transfer*, 2nd Ed., Tata McGraw - Hill, 1997. - C.J. Geankoplis,
*Transport Processes and Unit Operations*, 3rd Ed., Prentice Hall, India, 1993. - R. E. Treybal,
*Mass Transfer Operations*, 3rd Ed., McGraw -Hill International Edition, 1981.

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