Gaitonde, department of mechanical engineering, iit bombay. L ti to ln ro ri k 1 q heat transfer from cylinder or pipe w, btuhr k thermal conductivity of piping material wmk or wm oc, btu. Understanding the fundamentals governing heat transfer is key to designing equipment that involves heat exchange. Chapter 1 governing equations of fluid flow and heat transfer. Finally, to present a physical picture of the convection process, heat transfer in boundary layer flows will be. Nptel syllabus radiation heat transfer video course course outline blackbody radiation, radiative properties of surfaces, kirchoffs law, configuration factor, gas radiation, planck and rosseland mean absorption coefficient, radiation in furnaces, radiative equilibrium, interaction between conduction, convection and radiation course detail. The course emphasizes the underlying concepts of the conduction and convection modes of heat transfer and enumerates the laws and governing equations relating to the rates of heat transfer. Chemical engineering chemical engineering design ii nptel. Transports heat from a heat source to a heat sink works as an isothermalizer why twophase thermal system. Conductive heat losses through cylinder or pipe walls. Classification of heat exchangers transfer of heat from one fluid to another is an important operation for most of the. This excel spreadsheet helps you design a double pipe heat exchanger also known as a concentric tube heat exchanger. Combined friction and heat transfer in the convergingdiverging nozzle.
The subject heat transfer has a wide scope and is of prime importance in almost all fields of engineering and biological systems. Tube side pressure drop in case of tube side condensation. Sunando dasgupta iit kharagpur july 2018 thermal conductivity, stefan boltzmann law, heat transfer, conduction, convecton, radiation, physics duration. Effect of friction and area change using an adiabatic convergingdiverging nozzle. When a fluid flows through a conduit such as a tube, the fluid flow and heat. Employed in cooling semiconductors improve thermal control, laser diodes, photovoltaic cells, medical. Heat and mass transfer y y y 12 45 103108127 38 noc. Battery thermal management system for electric vehicle. Chemical and biomolecular engineering clarkson university heat transfer is the study of december 29th, 2018 nptel mechanical engineering heat and mass transfer. Part 3 12 8 introduction to freenatural convection 9 condensation. The rate of heat transfer from the cylinder increases with the addition of insulation for r 2 r cr. Sukhatmes course on heat and mass transfer, based on incropera. A heat exchanger is a device that is used to transfer thermal energy enthalpy between two or more fluids, between a solid surface and a fluid, or between solid particulates and a fluid, at different temperatures and in thermal contact. The second heat transfer process is convection, or heat transfer due to a flowing fluid.
Mod04 lec17 heat transfer corelations for flow across tube banks mod04 lec18 momentum and heat transfer analogies mod04 lec19 boundary layer heat transfer. Conventional exchangers shell and tube have channel size of 10 to 30 mm. Heat transfer from extended surfaces fins one dimensional unsteady conduction. Be able to use the correlations discussed in this course to calculate a value for the convection heat transfer. L i docira e office of aerospace research united sta9es air force. Heat pipes and heat pipe heat exchangers continued.
For electronic devices such as led headlamps and lcd displays, heat pipes can be invariably used to transfer, spread and dissipate. Heat and mass transfer video notes nptel lecturenotes. Lecture 1 introduction on heat and mass transfer youtube. Trace and ultratrace analysis of metals using atomic absorption spectrometry. Heat transfer can be enhanced by a factor of up to 10 during nucleate boiling, and the critical heat flux by a factor of 3. Overall heat transfer coefficient for doublepipe heat. Forced circulation reboilers with vertical or horizontal tubes boiling may be designed.
Radiation heat transfer and present plancks law, stefanboltzmann equation. Nptel chemical engineering mass transfer operations i ch303 mass transfer operations i. This is an introductory course in conduction and convection heat transfer. Thus, insulating the pipe may actually increase the rate of heat. This course is intended as a one semester course for first year graduate students on convection heat transfer. It consists of a stationery tube sheet which is are generally placed in square or triangular patterns pitch as shown in the steam oil free.
Topics to be covered include basic concepts in heat transfer, differential formulation of the continuity, momentum and energy equations, exact solution of onedimensional flow problems, boundary layer flow, approximate solutions using the integral method, heat. Note that the critical radius of insulation depends on the thermal conductivity of the insulation k and the external convection heat transfer coefficient h. Also note that radiative heat transfer and internal heat generation due to a possible chemical or nuclear reaction are neglected. Lecture 16 enhancement of heat transfer compact heat exchangers lecture 17 extended surface heat transfer. Enhancement of heat transfer in pool boiling surfaces that provide enhanced heat transfer in nucleate boiling permanently are being manufactured and are available in the market. Capillary driven heat pipes have been investigated for range of thermal control applications in the automotive sector 22,23.
Calculate the heat transfer area of the double pipe heat exchanger in the lab. Base your calculation on the outside area of the inside pipe. Screencasts covering topics in heat transfer conduction, convection, and radiation. Ironore is one of the most mineral existing in nature, and natural iron ore can be divided into different categories such as hematite, magnetite, limonite, and so on. In convection heat transfer, the heat is moved through bulk transfer of a nonuniform temperature fluid. Combined friction and heat transfer in a constant area pipe. Nptel chemical engineering chemical engineering design ii joint initiative of iits and iisc funded by mhrd page 33 of 41 lecture 6. Introduction typical heat transfer situations, 1 hour. Heat transfer occurs in many unit operations in variety of processes in chemical, petrochemical and pharmaceutical industries. Nptel chemical engineering chemical engineering design ii joint initiative of iits and iisc funded by mhrd page 36 of 41 ii.
Part 1 a similarity solution 11 7 flow through pipes. Nptel chemical engineering chemical engineering design ii. Heat transfer occurs in many unit operations in variety of processes in chemical, petrochemical, power and pharmaceutical industries. Mechanical engineering heat and mass transfer nptel. Conductive heat loss through the wall of a cylinder or pipe can be expressed as. This course for undergraduate students covers the fundamental aspects and quantitation of. Efficient heat transferefficient heat transfer boiling and condensationboiling and condensation small temperature difference between the heat source and. Sunando dasgupta iit kharagpur july 2018 thermal conductivity, stefan boltzmann law, heat transfer, conduction, convecton, radiation, physics. This course for undergraduate students covers the fundamental aspects and quantitation of di. Micro heat pipes z micro heat pipes small heat pipes that are noncircular and use angled corners as liquid arteries.
Nptel chemical engineering chemical engineering design ii joint initiative of iits and iisc funded by mhrd page 2 of 41 lecture 1. Nptel syllabus second level course in heat transfer web course course outline this course is essentially a fortification of the concepts learnt in a first course in heat transfer. The various topics learnt in conduction, convection and radiation are revisited and a little more information on these topics presented. Noticfs when government drawings, specifications, or other data are used for any purpose other than in. Rayleigh flow flow with heat transfer in a frictionless constant area pipe. Nptel syllabus second level course in heat transfer. Modeling of compressible flow with friction and heat. Introduction heat pipe is a capillary twophase heat transfer device. A heat pipe can transfer heat at orders of magnitude higher than a similar size of solid metal rod, without the use of moving parts.
The heat exchange duty a llows calculation of the log mean. Part 1 14 10 properties of a blackbody 15 11 inside sphere method, blackbody radiation exchange. For compressible flows the relation between density, pressure and temperature is. They have a particular advantage when close temperature approaches are needed or in high pressure applications. The most common application of heat transfer is in designing of heat. Heat transfer nptel online videos, courses iit video. Preliminary concepts and basic equations, lec1, pdf of lecture1, 7 kb.
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