## PY6402 - HEAT TRANSFER (Syllabus) 2013-regulation Anna University

PY6402

HEAT TRANSFER

LPTC

3003

OBJECTIVE:
To provide the knowledge of various modes of heat transfer, calculations and applications of the different modes to design of heat transfer equipments.

UNIT I

FUNDAMENTAL CONCEPTS AND CONDUCTIVE HEAT TRANSFER

9

Modes of heat transfer – Fourier’s law – Newton’s law– Thermal conductance and resistance – Temperature field and temperature gradient – Heat transfer by conduction –General heat conduction equation – Thermal diffusivity and equivalent thermal conductivity – One dimensional steady state conduction through thick cylindrical shells Critical thickness of insulation for cylindrical surfaces.

UNIT II

CONVECTIVE HEAT TRANSFER AND BOUNDARY LAYER THEORY

9

Heat transfer coefficient – Forced convection – Free convection – Dimensional analysis and empirical correlation – Physical significance of dimensionless groups – Concept of hydrodynamic and thermal boundary layers.

UNIT III

9

Thermal radiation – Spectrum of electromagnetic radiation – Monochromatic emissive power of black body – Planck’s distribution law – Kirchoff’s law – Total emissive power –Problems of Stefan Boltzmann law and Weins displacement law – Configuration factor determination – Typical examples.

UNIT IV

DESIGN OF HEAT EXCHANGERS

9

Heat exchangers – Types and variation in design – Overall heat transfer coefficient –LMTD – Correction factors for multiple pass heat exchanger – Illustrative examples –Number of transfer units and effectiveness of heat exchangers.

UNIT V

HEAT TRANSFER IN EVAPORATORS

9

Evaporation – Type of evaporators – Single and multiple effect operation – Capacity and economy of multiple effect evaporators – Effect of liquid head and boiling point elevation– Duhrings rule – Material and energy balance in evaporators – Illustrative examples.

TOTAL : 45 PERIODS

OUTCOMES: The student will be able to
• Identify different types of heat exchange equipment and understand the Principles of heat flow in fluids.
• Understand the various modes of heat transfer and detailed calculations of conduction, steady state and unsteady state.
• Test performance and measure heat transfer parameters in designing heat transfer equipment.

TEXT BOOKS:
1. Nesati, O.M., “Heat Transfer: A Basic Approach”, McGraw-Hill, 1985. 2. McCabe, W.L., Smith, J.C. and Harriot, P., “Unit Operations in Chemical Engineering”, 7th Edition, McGraw Hill, 2005.

REFERENCES:
1. Donald, Q.K., “Process Heat Transfer”, 1st Edition, Tata McGraw Hill Publishing 1997.
2. Mikheyev, M., “Fundamentals of Heat Transfer”, Mir Publishers, 1968