View notes mod1 from ech 143 at hanoi university of mining and geology. The thermal capacity of a heat exchanger nntu its ability to transfer heat between two fluids at different temperatures. Platetype exchangers have typically 5mm channel size. Knowledge about heat exchanger theory, calculations and design is important because of the widespread use of a variety of heat exchangers for industrial use and in everyday life. Heat exchanger is a device in which the exchange of energy takes place between two fluids at different temperature. A heat exchanger is a heat transfer device that exchanges heat between two or more process fluids.
The main option for research was internet and the library books, journals, thesis, etc. Different types of heat exchangers in addition, the overall heat transfer equation for the exchanger must be solved simultaneously. Qualitative dependence of the fluid temperature on position inside a singlepass heat exchanger is shown in fig. No guidance is given on how to generate these equations.
Heat exchangers fundamentals and design analysis prof. A practical guide for planning, selecting and designing of shell and tube exchangers takes users on a stepbystep guide to the design of heat exchangers in daily practice, showing how to determine the effective driving temperature difference for heat transfer. Optimal design of double pipe heat exchanger structures. It is called double pipe heat exchanger because one fluid flo ws inside a pipe and the other fluid flo ws between. Aloke kumar ghosal, department of chemical engineering, iit guwahati. For the love of physics walter lewin may 16, 2011 duration. The doublepipe heat exchanger is one of the simplest types of heat exchangers. This paper investigates the design optimization of double pipe heat exchanger using mathematical programming. Nptel, online courses and certification, learn for free. If the heat exchanger is located at the inlet or discharge of a blower with a pulsating flow, such as a roots type rotary lobe blower, the heat exchanger must be protected from the pulsation by a chambered silencer. Heat is transferred from one body to another by means of 1 radiation, which is the transfer of heat from a hot body to a cold body without a conveying medium, 2 convection, the transfer of heat by a conveying medium, such as air or water and 3 conduction, transfer of heat by actual physical contact, molecule to molecule. Types of heat exchangers 161c heat exchangers are classified according to the flow type as parallel flow, counter flow, and crossflow arrangement.
Apr 19, 2012 shell and tube heat exchanger shell and tube heat exhangers are one of the most common heat exchange equipment found in all plants. Classification of heat exchangers transfer of heat from one fluid to another is an important operation for most of the chemical industries. Different types of heat exchangers are shown in figure 42. They can operate at high pressures, are easy to clean and can be made of a wide variety of. Conduction and convection heat transfer 20,692 views. Browse and download heat transfer books of various titles, written by many authors and published by a number of publications for free in pdf format. Nptel video lectures, iit video lectures online, nptel. All books are in clear copy here, and all files are secure so dont worry about it. The term sensible heat refers to heat that can be measured with a thermometer. Types of heat exchanger construction although heat exchangers come in every shape and size imaginable, the construction of most heat exchangers fall into one of two categories. Download ebooks for free from engineering study material site.
So, we know it is the one of the most versatile type of heat exchanger used in the process industries or even in the nuclear plants. However, there is a disadvantage to smaller tubes if the fluid in your application is very viscous or has particulates, it can foul up the tube and undermine the heat transfer process. R sekulib university of kentucky introduction a heat exchanger is a device that is used for transfer of thermal energy enthalpy between two or more fluids, between a solid surface and a fluid, or between solid particulates and a. Doublepipe heat exchanger one fluid flows through the smaller pipe while the other fluid flows through the annular space between the two pipes. We are also trying that if we can have some sort of interactive classes. One btu is the amount of heat required to raise 1 pound of water 1 degree fahrenheit at sea level. Heat transfer nptel online videos, courses iit video lectures. Mod07 lec30 various types of compact heat exchangers. This site is like a library, you could find million book here by using search box in the header. Heat exchangers have widespread industrial and domestic applications. Introductory video on conduction and convection heat transfer duration. Conventional exchangers shell and tube have channel size of 10 to 30 mm giving about 100m2m3.
A heat exchanger is a device that is used to transfer thermal energy enthalpy. Reason for heat exchangers a heat exchanger is a piece of equipment built for efficient heat transfer from one medium to another hot and cold fluid. The heat exchanger area is minimized and the thermofluid dynamic conditions are considered for the use of the right transport correlations, together with design specifications, such as, maximum pressure drops and minimum excess area. Examples are water cooling towers and jet condensers in. This type of heat exchangers has a bundle of tubes enclosed in a shell, usually cylindrical. 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. A channel curvature component is added in order to take into account the somewhat improved heat transfer generated by secondary flow effects. The most common application of heat transfer is in designing of heat. Since all heat exchangers considered in this experiment have a single pass for both the hot and cold fluids, the discussion below is limited to singlepass heat exchangers.
Extension to other exchanger types requires new equations. Heat exchangers can cool or heat, and a sectioned plate heat exchanger can do both. Industrial heat exchanger types include the most common double pipe heat exchangers, shell and tube heat exchangers, as well as spiral, flat plate, and fin tube heat exchangers. Jul 01, 2016 heat can flow only from hotter to cooler fluids, as per the second law of thermodynamics. In counterflow, the hot and cold fluids enter the heat exchanger at. Heat exchangers are devices that regulate efficient heat transfer from one fluid to another. Iits and iiscs free open online web and video courses for science and engineering under nptel similar websites like nptel.
Fire the boiler as per instructions in the boiler manual. Learn for free, pay a small fee for exam and get a certificate. Nptel video lectures, iit video lectures online, nptel youtube lectures, free video lectures, nptel online courses, youtube iit videos nptel courses. Your browser does not currently recognize any of the video formats available. Nptel video courses information in supplementary formats.
Shell and tube heat exchangers page 4 of 30 mnl 032a issued 29 august 08, prepared by j. The rate of heat transfer strongly depends on the nature of nucleation and the type and the condition of the heated surface. Nptel online videos, courses iit video lectures well organized. Pdf transcriptions, html5 support, video subtitles for media player web. We will consider only the more common types here for discussing some analysis and design methodologies. They are the most versatile type of heat exchangers. May, 2009 description basically this presentation focuses on what are compact heat exchangers, the various types, costs, advantages and disadvantages and how fouling may affect. Download process design of heat exchanger nptel book pdf free download link or read online here in pdf. Nptel provides elearning through online web and video courses various streams.
Heat is a form of energy measured in british thermal uni ts btu. In a parallel flow heat exchanger, the two fluid streams hot and cold flow through the heat. Read online process design of heat exchanger nptel book pdf free download link book now. Therein, popular analytical techniques such as log mean temperature difference lmtd and effectivenessnumber of. Temperature is defined as a measure in degrees of sensible heat. Pdhonline course m371 2 pdh shell and tube heat exchangers. An alternate method based upon heat exchanger effectiveness is more appropriate for this type of analysis. This type provides a large heat transfer surface in a small space. The heat exchanger must be isolated from system vibrations using flexible piping connections and isolation pads on the mounting feet. It is called a doublepipe exchanger because one fluid flows inside a pipe and the other fluid flows between that pipe and another pipe that surrounds the first. Heat exchangers can be classified into four types, according to. Heat transfer data for spiral heat exchangers is empirically correlated using a conventional dittusboelter type relationship for turbulent flow. The two most common heat exchanger design problems are those of rating and sizing. Mar 02, 2019 equations for ntu vary by heat exchanger configuration, but the mathematical relationship for some types of heat exchangers is not readily available or easily derived.
May 04, 2009 heat transfer 1 heat exchangers heat transfer heat exchanger types of heat exchangers heat exchangers are classified according to flow arrangement and type of construction. The double pipe heat exchanger is one of the simplest types of heat exchanger s. Thermal design of a shell and tube heat exchanger typically includes the determination of heat transfer area, number of tubes, tube length and diameter, tube layout, number of shell and tube passes, type of heat exchanger fixed tube sheet, removable tube bundle etc, tube pitch, number of baffles, its type and size, shell and tube side. Types of heat exchanger, process design of shell and tube heat exchanger, condenser, and reboilers. Heat transfer nptel online videos, courses iit video. John richard thome ltcm sgm epfl heat transfer heat exchanger design 1er mars 2008 4 41. In process calculations, the main objectives of heat exchanger calculations are to determine the heat duty amount of energy to be transferred, temperature changes within the exchanger, and pressure drops. E1mnl032a design and rating of shell and tube heat. The first type of a heat exchanger is called the recuperative type, in which heat are exchanged on either side of a dividing wall by fluids.
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