HEAT TRANSFER (BME601)

HEAT TRANSFER

Course Code BME601
CIE Marks 50
Teaching Hours/Week (L:T:P: S) 3:0:2:0 
SEE Marks 50
Total Hours of Pedagogy 40 hours Theory + 8-­10 Lab slots 
Total Marks 100
Credits 04 
Exam Hours 03
Examination nature (SEE) Theory

MODULE­ 1

Introductory Concepts and definition: Review of basics of Modes of Heat Transfer.

Conduction­Basic Equations: General form of one­dimensional heat conduction equation. Boundary conditions of first, second and third kinds;

One dimensional Steady state conduction with and without heat generation: Steady state conduction in slab, cylinder and sphere with engineering applications.                          Steady state conduction: Overall heat transfer coefficient for a composite medium; thermal contact resistance; critical thickness of insulation, Discussion on engineering applications.

MODULE­ 2

Extended surfaces; Steady state conduction in fins of uniform cross section long fin, fin with insulated tip and fin with convection at the tip; fin efficiency & effectiveness, Discussion on engineering applications.

One dimensional Transient conduction: Conduction in solids with negligible internal temperature gradients (lumped system analysis) Use of transient temperature charts (Heisler’s charts) for Transient conduction in slab, long cylinder and sphere; Discussion on engineering applications.

MODULE­ 3

Numerical Analysis of Heat Conduction: Introduction, one­dimensional steady conduction and one Dimensional unsteady conduction, boundary conditions, and solution methods.

Radiation Heat transfer: Review of basic laws of thermal radiation, Intensity of radiation and solid angle; Concept of thermal radiation resistance, Radiation network, view factor, Radiation heat exchange between two parallel infinite black surfaces, between two parallel infinite gray surfaces; Effect of radiation shield; Discussion on engineering applications.

MODULE ­4

Concepts and Basic Relations in Boundary layers: Flow over a flat plate ­Velocity boundary layer, Thermal boundary layer; Prandtl number; general expression for local heat transfer coefficient; Average heat transfer coefficient.

Forced Convection: Physical significance of Dimensionless numbers. Use of various Correlations for hydro dynamically and thermally developed flows; Use of correlations for flow over a flat plate, cylinder, sphere and flow inside the duct.

Free or Natural Convection: Physical significance of dimensionless numbers. Use of correlations for free convection from or to vertical, horizontal and inclined flat plates, vertical and inclined cylinder.

MODULE ­5

Boiling and Condensation; Pool boiling regimes. Basics of Film and dropwise condensation, Use of correlations for film and dropwise condensation on tubes.

Heat Exchangers: Classification of heat exchangers; Overall heat transfer coefficient, Fouling, Scaling factors; LMTD and NTU methods of analysis of heat exchangers.

Experiments

1 Determination of Thermal Conductivity of a Metal Rod.

2 Determination of Overall Heat Transfer Coefficient of a Composite wall.

3 Determination of Effectiveness on a Metallic fin.

4 Determination of Heat Transfer Coefficient in free Convection

5 Determination of Heat Transfer Coefficient in a Forced Convention

6 Determination of Emissivity of a Surface and Determination of Stefan Boltzmann Constant.

7 Determination of LMDT and Effectiveness in a Parallel Flow and Counter Flow Heat Exchangers.

8 Experiments on Boiling of Liquid and Condensation of Vapour.

9 Experiment on Transient Conduction Heat Transfer.

10 Use of CFD for demonstrating heat transfer mechanism considering practical applications,

Minimum two exercises 

12 Using one dimensional transient conduction, experimentally demonstrate estimation of thermal

conductivity and thermal diffusivity

Text Books:

1. Principals of heat transfer Frank Kreith, Raj M. Manglik, Mark S. Bohn Cengage learning Seventh Edition 2011.

2. Heat transfer, a practical approach Yunus A. Cengel Tata Mc Graw Hill Fifth edition

Reference Books:

1. Heat and mass transfer Kurt C, Rolle Cengage learning second edition

2. Heat Transfer A Basic Approach M. Necati Ozisik McGraw Hill, New York 2005

3. Fundamentals of Heat and Mass Transfer Incropera, F. P. and De Witt, D. P John Wiley and Sons, New York 5thEdition 2006

4. Heat Transfer Holman, J. P. Tata McGraw Hill, New York 9th Edition 2008