# Heat and Mass Transfer

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# Code(Credit) : CUTM1525(2+1+1)

## Course Objectives

• To understand the basic concepts and mechanisms of heat and mass transfer under steady state and transient conditions.

## Learning Outcomes

• Apply heat conduction equations to different surface configurations under steady state and transient conditions and solve problems.
• Apply free and forced convective heat transfer correlations to internal and external flows through/over various surface configurations and solve problems.
• Explain basic laws for radiation and apply these principles to radiative heat transfer between different types of surfaces to solve problems.
• Apply diffusive and convective mass transfer equations and correlations to solve problems for different applications.

## Course Syllabus

Module I (T-3 Hrs.+P-2Hrs.+Pj-2Hrs.)

Introduction to heat transfer: Heat Transfer Mechanisms

Conduction:

Fourier’s Law of Conduction, General Heat Conduction Equation in Different Coordinate Systems (No Derivation), One Dimensional Steady State Conduction in Plane Wall, Conduction with Internal Heat Generation.

Practice 1: To find the thermal conductivity of a material by the two slabs guarded hot plate method.

Assignment 1: Assignment on Conduction.

Module II (T-2 Hrs.+P-2Hrs. +Pj-2Hrs.)

Fins and Transient Conduction:

Overall Heat Transfer Coefficients, Unsteady State Heat Conduction, Lumped Heat Capacity System and Lumped Capacitance Method.

Practice 2: To find the thermal resistance of the sample.

Assignment 2: Assignment on Fins and Transient Conduction.

Module III (T-4 Hrs.+P-4Hrs. +Pj-2Hrs.)

Convection:

Thermal Boundary Layer, Principles and Governing Equations, Forced Convection: External Flow over a Flat Plate, Internal Flow Through Pipe, Natural Convection: Vertical & Horizontal Surfaces.

Practice 3: To determine the overall heat transfer coefficient at the surface of a given vertical metal cylinder by the natural convection method.

Practice 4:  To verify Newton's Law of Cooling of different materials and different liquids.

Assignment 3: Assignment on Convection.

Module IV (T-2 Hrs.)

Heat Transfer with Phase Change:

Film Wise and Drop Wise Condensation, Boiling Heat Transfer, Regimes of Boiling.

Module V (T-2 Hrs.+P-2Hrs. +Pj-2Hrs.)

Heat Exchangers:

Types of Heat Exchangers, Heat Exchanger Analysis, LMTD, Overall Heat Transfer Coefficient, Heat Exchanger Effectiveness, NTU.

Practice 5: Determination of Effectiveness and Efficiency of Parallel Flow and Counter Flow Heat Exchanger.

Assignment 4: Assignment on Heat Exchangers.

Module VI (T-4 Hrs.+P-2Hrs. +Pj-2Hrs.)

Black Body Emission, Emissive Power, Laws of Radiation, Nature of Black Bodies, Radiation Shape Factor, Radiation Heat Transfer Between Two Surfaces.

Practice 6: To find the emissivity of different material surface.

Module VII (T-3 Hrs.+Pj-2Hrs.)

Mass Transfer:

Introduction, Analogy between heat and mass transfer, Mass diffusion, Fick’s law of diffusion, boundary conditions, Steady mass diffusion through a wall, Mass convection.

Assignment 6: Assignment on Mass Transfer.

Text Books:

1. Mahesh M. Rathore, Engineering Heat Transfer , Jones & Bartlett Learning, 2011
2. Yunus A. Cengel & Afshin J. Ghajar, “Heat and Mass Transfer-Fundamentals and Applications”, McGraw Hill, 5th Edition 2015
3. Yunus Cengel, Heat And Mass Transfer: Fundamentals And Applications, McGraw-Hill Higher Education, 2014

Reference Books:
1. R.C Sachdeva, Fundamentals of Heat and Mass Transfer
2. R.K. Rajput, Heat Transfer, Laxmi Publication

## Session 1

Fourier’s Law of Conduction, General Heat Conduction Equation in Different Coordinate Systems (No Derivation), One Dimensional Steady State Conduction in Plane Wall, Composite Wall.

## Session 2

One Dimensional Steady State Conduction in Plane Wall, Composite Wall, One Dimensional Steady State Conduction in Composite Cylinders and Composite Spheres with Convective Atmosphere.

## Session 3

Electrical Analogy, Conduction with Internal Heat Generation.

## Sessions 4 & 5

Practice 1. To find the thermal conductivity of a material by the two slabs guarded hot plate method.

http://vlab.amrita.edu/?sub=1&brch=194&sim=801&cnt=1

http://htv-au.vlabs.ac.in/heat-thermodynamics/Heat_Transfer_by_Conduction/

## Sessions 6 & 7

Project 1. Assignment on Conduction.

## Session 8

Overall Heat Transfer Coefficients, Critical Thickness of Insulation, Heat Transfer from Extended Surfaces, Effectiveness and Efficiency.

## Session 9

Unsteady State Heat Conduction, Lumped Heat Capacity System and Lumped Capacitance Method

## Sessions 10 & 11

Practice 2. To find the thermal resistance of the sample.

http://vlab.amrita.edu/?sub=1&brch=194&sim=801&cnt=1

## Sessions 12 & 13

Project 2. Assignment on Fins and Transient Conduction.

## Session 16

Use of Empirical Relations, Internal Flow Through Pipe, Annular Spaces and Non-Circular Conduits.

## Session 17

Natural Convection: Vertical, Horizontal, Inclined Surfaces.

## Sessions 18 & 19

Practice 3. To determine the overall heat transfer coefficient at the surface of a given vertical metal cylinder by the natural convection method.

http://vlab.amrita.edu/?sub=1&brch=194&sim=791&cnt=1

http://htv-au.vlabs.ac.in/heat-thermodynamics/Heat_Transfer_by_Natural_Convection/

## Sessions 20 & 21

Practice 4. To verify Newton's Law of Cooling of different materials and different liquids.

http://vlab.amrita.edu/?sub=1&brch=194&sim=354&cnt=1

http://htv-au.vlabs.ac.in/heat-thermodynamics/Newtons_Law_of_Cooling

## Sessions 22 & 23

Project 3. Assignment on Convection.

## Session 24

Film Wise and Drop Wise Condensation.

## Session 25

Boiling Heat Transfer, Regimes of Boiling.

## Sessions 28 & 29

Practice 5. Determination of Effectiveness and Efficiency of Parallel Flow and Counter Flow Heat Exchanger.

## Sessions 30 & 31

Project 4. Assignment on Heat Exchangers.

## Sessions 43 & 44

Project 6. Assignment on Mass Transfer.