Indirect heat exchangers are available in several main types plate, shelland tube, spiral etc. When considering what you want from a heat exchanger you should think about which medium you want to heat or cool and what you are using it for. A heat exchanger is a device which transfers or exchanges heat from one fluid to another. Heat travels always from a hot body to a cold body. Different types and sizes of heat exchangers are used in steam power plants, chemical processing units, building heating and air conditioning, house hold. Heat pipe air preheaters are used in thermal power plants to preheat the secondary. Common heat exchanger applications, including steam preheaters and condensors. Depending on the type of heat exchanger employed, the heat transferring process can be. Due to their simple design, they also hold a prominent place in engineering curricula around the globe. Plate heat exchangers separate the fluids exchanging heat by the means of plates.
Comparison of heat exchanger types each of the three types of heat exchangers parallel, cross and counter flow has advantages and disadvantages. Based on the matches made, the new heat exchanger network configuration is decided. 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. It means that it is impossible to heat a fluid up to exactly the same temperature as the heating fluid. Examples of heat exchangers you can buy off the internet bottom heat exchangers exchange heat from a hot fluid to a cooler fluid to either heat up or cool down a stream. Types of heat exchangers the simplest type of heat exchanger consists of two concentric pipes of different diameters, as shown in figure 1, called the doublepipe heat exchanger. A compact heat exchanger is a device characterized by a high heat transfer area per unit volume more than 300 m2m3. Heat exchanger is a process equipment designed for the effective transfer of heat energy between two fluids. Types of heat exchangers pdf types of heat exchangers pdf. 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. Paul mueller company academy recently posted an informative article, which heat exchanger is best.
Lewin heat exchanger design lecture objectives nbe familiar with the major types of available heatexchange equipment, with particular emphasis on shellandtube heat exchangers. Describe hot and cold fluid flow in parallel flow, counter flow, and cross flow heat exchangers. For better understanding we can classify different type of heat exchangers in some categories which are as follow. If you are working on a project during either the basic or the detailed engineering phase, there is a good chance that you will need to specify one or more shellandtube exchangers and perhaps. Among the recuperative heat exchangers are the plate heat exchangers, such as crossflow, counterflow and cross counterflow heat exchangers in which the flows only exchange energy and dont come into contact with each other. Amongst of all type of exchangers, shell and tube exchangers are most commonly used. 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. Cross or counter flow as per their construction materials 1. Find heat exchanger stock images in hd and millions of other royaltyfree stock photos, illustrations and vectors in the shutterstock collection. The three main types explained heat exchangers all work by passing a hot fluid and a cold fluid across opposite sides of a piece of metal. There are different types of compact heat exchanger design available.
Heat exchangers a heat exchanger is a system designed to transfer heat between two fluids to control the temperature of one of the fluids. 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. Additionally, heat exchangers may be classified according to the type of fluid. Recognize numerous types of heat exchangers, and classify them, develop an awareness of fouling on surfaces, and determine the overall heat transfer coefficient for a heat exchanger. John richard thome ltcm sgm epfl heat transfer heat exchanger design 1er mars 2008 4 41. Shellandtube heat exchangers are the most widely used heat exchangers in process industries because of their. Typically in the manufacturing industry, several differing types of heat exchangers are used for just one process or system to derive the final product. Another type of heat exchanger is the plate heat exchanger. General classification of heat exchangers is shown in the figure 1. A heat exchanger is a piece of equipment built for efficient heat transfer from one medium to another.
It discusses the advantages and disadvantages of each type of help designers become more discriminating, competent, and confident as users of this equipment. Shellandtube heat exchangers are one of the most important and commonly used process equipment items in the chemical process industries cpi. Advances in gasket and brazing technology have made the platetype heat exchanger increasingly practical. Dear sirs working on designing reboiler and condenser with graphite block type heat exchanger block type heat exchanger is cross flow heat exchanger. A temperature difference too low avoids the heat to flow. The role of engineering designers is to convert the user needs into the heat exchanger outputs. Heat exchangers jordan university of science and technology. They can be used to arrive at a type that is best suited for a given process. Revised and updated with new problem sets and examples, heat exchangers. Plate heat exchangers are usually brazed or gasketed depending on the application and fluids being used. For the heat transfer to occur two fluids must be at different temperatures and they must come thermal contact. Overall heat transfer coefficient in block type heat exchanger posted in process heat transfer.
Choosing the right heat exchanger hx requires some knowledge of the different heat exchanger types, as well as the environment where the unit must operate. Such types of heat exchangers are used predominantly in air conditioning, humidification, industrial hot water heating, water cooling and condensing plants. Because of the number of variations in mechanical designs for front and rear heads and shells, and for commercial reasons,the tubular exchanger manufacturers associationtema has designated a system of notations that correspond to each major type of front head, shell style and rear head. Many types of heat exchangers have been developed for use in steam power plants. Attaches to the front of the cozy heat exchanger for ducting. This article focuses on heat exchangers, exploring the various designs and types available and. The tables below offer the advantages and disadvantages of common types of heat exchangers. One of the most commonly used heat exchangers is the shellandtube heat exchanger as shown in figure 1. A heat exchanger is a device that is used to transfer thermal energy enthalpy between. Shell and tube heat exchangers dominated the heat exchanger market up until the early 21 st century, as plate heat exchangers began to replace them in the oil and hvac industries. The devices that are used to facilitate heat transfer between two or more fluids at different temperatures are known as heat exchangers. Aa, bg, c, d, hp, hr, lc, and tv series heat exchangers.
They are widely used in space heating, refrigeration, air conditioning, power plants, chemical plants, petrochemical plants, petroleum refineries, natural gas processing and. Advances in gasket and brazing technology have made the plate type heat exchanger increasingly practical. Classifications of heat exchanger heat exchanger guide. Added eight types of arrangement mode for the apple inc. Plate heat exchangers are mainly found in the cryogenic and food processing industries. There are many types of heat exchangers applied in the process industry. This brochure is designed to familiarize user with the types, components, and features of aircooled heat exchangers aches by means of simplified explanations and procedures.
Compare different types of heat exchangers, shell and tube, double pipe, plate, air cooled and many more. Some of the types of twophase heat exchangers available include boilers, condensers, and evaporators. Warranty and service contact information is also included. In hvac applications, large heat exchangers of this type are called plateandframe. The plateandframe heat exchanger design consists of stacked of corrugated plates which are bonded together. Doublepipe heat exchanger one fluid flows through the smaller pipe while the other fluid flows through the annular space between the two pipes.
A heat exchanger is a device that is used to transfer thermal energy enthalpy. Based on the design characteristics indicated above, there are several different variants of heat exchangers available. In industries, heat exchangers are used in industrial process to recover heat between two process fluids. Their compact stainless steel construction makes them an ideal choice for use with refrigerants or in food and beverage processing. These devices can be used widely both in daily life and industrial applications such as steam generators in thermal power plants, distillers in chemical industry, evaporators and condensers in hvac applications and refrigeration process, heat sinks, automobile radiators and regenerators. These exchangers are composed of many thin, slightly separated plates that have very large surface areas and small fluid flow passages for heat transfer. A heat exchanger could remove thermal energy from a fluid used in an airconditioning system or add thermal energy to a system where processes require a certain temperature to work properly. Mixing, cooking, and cooling small or no particulates, then plate heat exchangers are used for cooling. The efficiency of a counter flow heat exchanger is due to the fact that the average t difference in temperature. The heat exchanger is an important component in every large industry.
Heat exchange involve convection in each fluid and. In a plate heat exchanger, there is an indirect contact between the sauce and a cooling medium such as chilled water. Before study the type of heat exchangers we should have proper knowledge of the type of flow used in heat exchangers, because different types of flows are used in heat exchangers according to our requirement. Heat exchangers are devices that transfer energy between fluids at different temperatures by heat transfer. Heat exchangers 73 individual thermal resistances of the system.
Types of heat exchangers industrial heat exchanger. Due to the custom nature of all xchanger heat exchangers, this manual discusses the characteristics and procedures that are common to all exchangers. Be sure your doctor and lab personnel know get you going and more info on the. Combining each of these resistances in series gives. Overall heat transfer coefficient in block type heat. Design of heat exchangers3 user needs of heat exchanger include types of fluids, quality of fluids fouled fluids, clean fluids,etc. Classification of heat exchangers according to different. Plate heat exchangers operate in very much the same way as a shell and tube heat exchanger, using a series of stacked plates rather than tubes. Therein, popular analytical techniques such as log mean temperature difference lmtd and effectivenessnumber of. Different types of heat exchangers are shown in figure 42. User needs of heat exchanger include types of fluids, quality. Gbhepeghea506 selection of heat exchanger types information contained in this publication or as otherwise supplied to users is believed to be accurate and correct at time of going to press, and is given in good faith, but it is for the user to satisfy itself of the suitability of the information for its. Likewise heat exchangers are used in almost every industry for heat transfer and heat recovery applications.
But of the three, the counter flow heat exchanger design is the most efficient when comparing heat transfer rate per unit surface area. There are many different names for heat exchangers because of their varied applications. In most cases the plate type is the most efficient heat exchanger. In order to make the best selection, it is important to have some knowledge of the different types of heat exchangers and how they operate. Heat exchanger and its types engineering solutions. Heat transfer heat exchanger types of heat exchangers. These normally have enhanced surfaces such as fins or embossing and are either bolted together, brazed or welded. Comparison of heat exchanger types china stainless steel.
Heat transfer, or heat, is energy in transition between communicating systems due to a temperature difference. Darcyweisbach dead zones double pipe fouling friction factor hairpin heat exchanger hazenwilliams head loss calculation hear exchangers heat duty heat exchanger heat exchanger designation heat exchangers heat load heat transfer latent. Chapter 11 heat exchangers objectives when you finish studying this chapter, you should be able to. Convection within a heat exchanger is always forced, and may be with or without phase change of one or both fluids. It is through this technology that most of the industrial processes are successfully carried out. Kit includes 1plenum housing pn sme100300 2snap on hose adapters pn plx750000 3plenum plugs pn sme100500 cozy plenum kit part number sme102000 cozy grilles a variety of shapes and materials provide. Understanding heat exchangers types, designs, applications and. Thousands of new, highquality pictures added every day. The basic principle of its use is to transfer heat, whether in liquid or gas form, through a series of conductive channels. Loop heat pipes, pulsating heat pipes and sorption heat pipes are the novelty for modern heat exchangers.
A piece of equipment built for efficient heat transfer from one medium to another. The amount of heat transfer is equal to the maximum heat transfer thermodynamically possible. Selection, rating, and thermal design, third edition presents a systematic treatment of the various types of heat exchangers, focusing on selection, thermalhydraulic design, and rating. Pdf a heat exchanger is a heat transfer device that exchanges heat between two or more process fluids.
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