VFSTR UNIVERSITY
Agricultural Engineering 63
II Year II Semester L T P To C
3 1 - 4 4
AG202 Heat and Mass Transfer
Course Description & Objectives:
To study the basics of heat and mass transfer properties of materials. The course will make the basics of process engineering.
Course Outcomes:
After completion of this course, the student would be able to:
1. apply principles of heat and mass transfer to basic engineering systems
2. analyse heat transfer by conduction and convection 3. analyse and design heat exchangers
4. analyse diffusional processes and calculate the flux in a diffusion process
Unit I: Basics and Conduction Heat Transfer:
Introductory concepts, modes of heat transfer, thermal conductivity of materials, measurement. General differential equation of conduction. One dimensional steady state conduction through plane and composite walls, tubes and spheres with and without heat generation. Electrical analogy.
Unit II: Insulation and Convection Heat Transfer:
Insulation materials, critical thickness of insulation. Fins, Free and forced convection. Newton’ s law of cooling, heat transfer coefficient in convection.
Dimensional analysis of free and forced convection. Useful non dimensional numbers and empirical relationships for free and forced convection. Equation of laminar boundary layer on flat plate and in a tube. Laminar forced convection on a flat plate and in a tube.
Unit III: Radiation Heat Transfer:
Combined free and forced convection. Absorptivity, reflectivity and transmissivity of radiation. Black body and monochromatic radiation, Planck’
s law, Stefan-Boltzman law, Kirchoff’ s law, grey bodies and emissive power, solid angle, intensity of radiation.
Unit IV: Heat Exchangers:
Radiation exchange between black surfaces, geometric configuration factor.
Heat transfer analysis involving conduction, convection and radiation by
VFSTR UNIVERSITY
64 Dept. of Applied Engineering
networks. Types of heat exchangers, fouling factor, log mean temperature difference, heat exchanger performance, transfer units.
Unit V: Mass Transfer:
Heat exchanger analysis restricted to parallel and counter flow heat exchangers. Steady state molecular diffusion in fluids at rest and in laminar flow, Flick’ s law, mass transfer coefficients. Reynold’ s analogy.
TEXT BOOKS:
1. Geankoplis, C.J. (1997). Transport Processes and Unit Operations.
Prentice Hall of India, New Delhi.
2. Sachdeva R C, “Fundamentals of Engineering Heat and Mass Transfer”
New Age International, 1995.
REFERENCES:
1. Treybal, R.E. (1981). Mass transfer Operation. McGraw Hill Book.
2. Arora, S.C and Domkundwar, S. (1984). A Course in Heat & Mass Transfer (3 ed.). Dhanpat Rai & Sons, Delhi.
3. Frank P. Incropera and David P. DeWitt, “Fundamentals of Heat and Mass Transfer”,John Wiley and Sons, 1998.
4. Holman,J.P. (1989). Heat Transfer S.I. Metric Edition. McGraw Hill Book Company Ltd., New Delhi.
5. Yadav R “Heat and Mass Transfer” Central Publishing House, 1995.
6. Ozisik M.N, “Heat Transfer”, McGraw-Hill Book Co., 1994.
7. Nag P.K, “ Heat Transfer”, Tata McGraw-Hill, New Delhi, 2002 8. http://nptel.ac.in/courses/112108149/
