Historic introduction of plate heat exchanger rules into asme and national board codes michael pischke ge power 2. The notes are intended to describe the three types of heat transfer and provide. A shellandtube heat exchanger must be designed to heat 2. The basic process heat and material balance is now in place, and the heat exchanger network the third layer can be designed. Heat exchangers are an enabling technology for efficient power generation with a closed, recuperated brayton cycle using supercritical carbon dioxide sco 2 as the working fluid. As an introductory course, it is particularly suited to those new to their role or industry.
Compact heat exchanger, enhancements in heat exchanger, nano fluid, shell and tube heat exchanger. This course is an introduction to the principal concepts and methods of heat transfer. 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. Heat exchangers are devices that regulate efficient heat transfer from one fluid to another. Steps have been taken in designing these furnaces to prevent flue products from leaking into the home environment. It is to be expected therefore, that the flow of the fluids through the exchanger will influence to a lesser or greater degree, the laying down of deposits on the surfaces of. For the heat transfer to occur two fluids must be at different temperatures and they must come thermal contact. 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. Introduction to heat exchangers heat exchanger heat. 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. A heat exchanger is a system used to transfer heat between two or more fluids. Plate heat exchanger, how it works working principle hvac industrial engineering phx heat transfer duration. Pdf heat exchanger lab experiment chemical engineering.
Types of heat exchangers shell and tube, plate type. Explores the principle that heat transfer rests on, but goes beyond, thermodynamics. A heat exchanger is a component that allows the transfer of heat from one fluid liquid or gas to another fluid. They are widely used in space heating, refrigeration, air conditioning, power stations, chemical plants, petrochemical plants, petroleum refineries, natural. Heat exchangers influence the overall system efficiency and system size. In a floating head heat exchanger, a removable cover may be incorporated into the shell at the floating end allows access to the floating head. In chemical engineering, we have to know how to predict rates of heat transfer in. The recuperator or the throughthewall nonstoring exchanger the directcontact nonstoring exchanger the regenerator, accumulator, or heat storing exchanger. You do not need prior knowledge or experience to complete this course and it is assumed that you. Two types of flow arrangement are possible in a doublepipe heat exchanger. The term heat exchanger applies to all equipment used to transfer heat between two streams.
Counter flow heat exchangers are the most efficient of the three types. Introduction to heat exchanger free download as powerpoint presentation. A procedures manual was created for the doublepipe heat exchanger. The important thing to remember is that a description of heat transfer requires that additional principles be. In counter flow heat exchangers the fluids enter the exchanger. However, in those situations where a heat exchanger has. Introduction to shell and tube heat exchangers introduction general description identifying major components tema standards vibration.
Heat exchangers are used in both cooling and heating processes. Heat exchanger is a device for transferring heat from one medium to another. Heat exchangers have widespread industrial and domestic applications. A heat exchanger is a heat transfer device that exchanges heat between two or more process fluids. Heat exchangers are similar to pumps and vessels in that they are widely used in most process plants. Limitations on the heat exchanger length, diameter, weight, andor tube.
Heat exchangers are devices for transferring heat from a hot flowing stream to a cold flowing stream. To reduce the temperature of a hot fluid by means of a. The objectives of this integrated subject are to develop the fundamental principles and laws of heat transfer and to explore the implications of these principles for system behavior. Reason for heat exchangers a heat exchanger is a piece of equipment built for efficient heat transfer from one medium to. Introduction to heat exchangers bengt sunden lund institute of technology. This elearning course is aimed at individuals working the process industries who require a basic overview of the operation and uses of heat exchangers. The heat exchanger should cost as little as possible provided that the above criteria are satisfied. A heat exchanger is a component that allows the transfer of heat from one fluid liquid or. Introduction gas furnaces have earned a reputation for safe, reliable performance. A heat exchanger is a device that is used to transfer thermal energy enthalpy between two or more fluids, between a solid surface and. It is a device that is used to transfer thermal energy from one body or fluid stream to another heat exchanger seminar ppt with pdf report heat exchangers are found widely scattered throughout the food process industry.
Introduction to heat exchanger heat exchanger heat. It is the most common type of heat exchanger in oil refineries and other large chemical processes. The exchange can take place between a process stream and a utility stream cold water, pressurized steam, etc, a process stream and a power source electric heat, or between two process streams resulting in energy integration and reduction of external heat sources. Ideal as an introduction to engineering heat transfer. Contents preface li acknowledgments liii author lv chapter1 heatexchangers. In any heat exchanger there must be a fluid that requires a change in energy heating or cooling and a fluid. Heat exchanger is widely applied to industrial process, power plant, transportation. Heat exchange involve convection in each fluid and. Pdf a heat exchanger is a heat transfer device that exchanges heat between two or more process fluids. Due to the high heat transfer efficiency of the plates, plate type heat exchangers are usually very small when compared to a tube and shell type heat exchanger with the.
However, the term is commonly used to equipment in which two process streams exchange heat with each other. Heat exchangers are designed to handle fluids, either gases or liquids. This is due to the larger area the plates provide over tubes. The fluids may be separated by a solid wall to prevent mixing or they may be in direct contact. Introduction to heat exchangers slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Heat transfer processes set limits to the performance of aerospace components and systems and the subject is one of an enormous range of application. Heat exchangers are used to transfer heat between two sources. A shell and tube heat exchanger is a class of heat exchanger. Department of chemical and biomolecular engineering.
Experiment regarding heat exchanger concurrentcountercurrent flows at same rate and different rates. In parallel flow, both the hot and cold fluids enter the heat exchanger at the same end and move in the same direction, as shown in figure 1. A heat exchanger is a device that is used to transfer thermal energy enthalpy. As its name implies, this type of heat exchanger consists of a shell a large vessel with a bundle of tubes inside it. If you continue browsing the site, you agree to the use of cookies on this website.
Heat transfer is the process of the movement of energy due to a temperature difference. Examples of the use of heat pipes are in the recovery of stored heat in solar home heating see problem 3. When cooling both fluids and gases, there are two sources readily available. The control of heat within any facility is an important part of plant operation, whether by direct application e. Heat exchanger performance is influenced by mixing finned both fluids unmixed unfinned one fluid mixed the other unmixed shellandtube heat exchangers baffles are used to establish a crossflow and to induce turbulent mixing of the shellside fluid, both of which enhance convection the number of shell and tube passes may be varied. In contrast to the parallel flow heat exchanger, the counter flow heat exchanger can have the hottest coldfluid. Introduction heat exchangers are devices that facilitate the exchange of heat between two fluids that are at different temperatures while keeping them from mixing with each other.
The theories of transient heat transfer in doublepipe heat exchangers were explained and followed by literature correlations. The oil provides an average convection coefficient ho 400 wm2k on the outside of the tubes. The remaining heating and cooling duties are handled by the utility system the fourth layer. Introduction of heat exchangers piping analysis youtube.
Mean temperature differenc fore a counterflow heat exchanger 123 125 126 127. Introduction to heat transfer mechanical engineering. The heat exchanger designs must balance between heat exchanger effectiveness and pressure drop to achieve the desired tradeoff between system. Qualitative dependence of the fluid temperature on position inside a singlepass heat exchanger is shown in fig. Doublepipe heat exchanger one fluid flows through the smaller pipe while the other fluid flows through the annular space between the two pipes. Arpaci, ahmet selamet, shuhsin kao the philosophy of the text is based on the development of an inductive approach to the formulation and solution of applied problems. Reason for heat exchangers a heat exchanger is a piece of equipment built for efficient heat transfer from one medium to another. Heat exchanger the purpose of a heat exchanger is just thatto exchange heat. The aircooled heat exchanger is a device for rejecting heat from a fluid or gas directly to ambient air. To heat a cooler fluid by means of a hotter fluid 2. Introduction to heat exchangers free download as powerpoint presentation.
The calculations we are interested in include determining the final temperatures of materials and how long. In intercoolers, boilers, preheaters and condensers inside power plants as well as other engineering processes, heat exchangers are utilized for controlling heat energy. Heat exchangers jordan university of science and technology. The process utility system may be a part of a centralised sitewide utility system. Heat exchanger is a process equipment designed for the effective transfer of heat energy between two fluids.
Pdf heat exchanger types and classifications researchgate. However, the term is commonly used to equipment in which two. Most processes require the heating or cooling of streams to produce a desired temperature before the stream can be fed to operations. Review of literature on heat transfer enhancement in heat. Regenerative versus nonregenerative heat exchangers. Heat exchanger hx is a device that provides heat exchange between two fluids that have temperature difference. The classic example of a heat exchanger is found in an. Introduction to engineering heat transfer these notes provide an introduction to engineering heat transfer.
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