List of colleges in gujarat

GUJARAT UNIVERSITY

B.E. (Chemical Engineering)

CH 405 Process Heat Transfer

Sr. No.	Subject	Teaching Scheme (Hrs.)			Exam Scheme (Marks)
		Lect	Tut	Pract	Theory 3 Hrs.	Sessional	T/W	Pract	Total
CH-405	Process Heat Transfer	3	-	3	100	50	25	25	200

1. Introduction to three modes of heat transfer: Conduction convection & radiation. General laws of heat transfer.

2. Conduction: Fourier's law. Conductivity, its variation with temp. & Pressure and its relationship with electrical conductivity. Heat transfer through composite walls and cylinders. Unsteady state heat transfer through some important shapes. Insulating materials general properties & application.

3. Natural convection: Natural convection from vertical plates & horizontal cylinders. Forced convection: In laminar flow - Heat transfer in plate & in tubes. In turbulent flow - Empirical equations for individual coefficients: inside tubes, outside tubes, outside bundle of tubes, flow past spheres. Significance of Prandtl No., Nusselt No., Grashof No., Graetz No. & Peclet No. Correction for tube length. Correction for heating and cooling and other corrections. Various analogies between heat & momentum transfer.

4. Radiation: Radiation laws like Stefan Boltzman's law, Kirchoff's law, Wien’s law, Plank's law etc. Black body, Grey body. Transmittivity, Absorptivity, Reflectivity, Emissivity of black bodies and gray bodies. Application of thermal radiation: Radiation Transfer between surfaces. Radiation through semi transparent materials.

5. Heat transfer with phase change: Boiling of liquids condensation of vapor. Film wise & drop wise condensation. Weighted LMTD & Overall Heat transfer Coefficient for desuperheating & sub cooling.

6. Evaporation: Performance of tubular evaporator. Individual & overall coefficients. Capacity & economy of evaporators. Boiling point elevation, Duhring’s rule, Effect of liquid head & friction on pressure drop. Types of evaporators. -Multiple effect evaporators. -Vapor recompression-Thermal recompression & mechanical recompression.

7. Heat Exchange equipments: -Double pipe heat exchangers. Individual and overall heat transfer coefficient LMTD. Variable overall Heat transfer. Coefficient fouling factors. Shell & tube heat exchangers. LMTD correction factors. General constructions.-Extended surface equipment. Fin efficiency. Fin effectiveness. Calculations of overall heat transfer coefficient for extended surface heat exchangers. -Agitated vessels. -Scrapped surface exchangers. -Heat transfer through fluidized beds.

8. Industrial furnaces. : Types of industrial furnaces, their advantages and dis-

Advantanges, factors affecting the heat transfer etc.

9. Introduction to heat exchangers like condenser without subcooling, condenser with subcooling, uses and applications.

10. Introduction to heat exchangers like reboilers, kettle type reboiler and thermosyphon reboiler, uses and applications.

11. Introduction to transport phenomenon with respect to heat transfer.

Practical and Term work:

Experiments related to conduction, convection, radiation, evaporation, industrial furnaces, heat exchangers etc.

Text books:

1. "Heat Transmission" : W. H. McAdams, McGraw Hill, 3rd Edition.

2. "Process Heat Transfer" : D. Q. Kern, McGraw Hill.

Reference Books:

1. Unit operation of Chemical Engineering": W. L. McCabe and J. C. Smith, McGraw Hill, 3rd Edition.,

2. "Principles of unit operation”: A. S. Foust et. al., Wiley International.

3. Chemical Engineering., Vol.-VI, Coulson and Richardson’s

4. Fundamentals of Engineering heat and mass transfer by R.C. Suchdeva.