This site is like a library, use search box in the widget to get ebook that you want. As older facilities are upgraded or newly designed facilities are built, large plate type heat exchangers are replacing tube and shell heat exchangers and becoming more common. Reasonable price due to these features, the hisaka plate heat exchangers are highly appreciated in all industries. Plate heat exchangers were first produced in the 1920s and have since been widely used in a great number of sectors a plate exchanger consists of a series of parallel plates that are placed one above the other so as to allow the formation of a series of channels for fluids to flow between them. 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. Thermal science teaches us that for a flat plate heat exchanger, the overall heat transfer coefficient u is such that its inverse, called thermal resistance, is the sum of thermal resistances between the two fluids. Due to the high heat transfer efficiency of the plates, plate type heat exchangers are usually very small when compared. Thank you for purchasing the hisaka plate heat exchanger.
In the 1930s, plate heat exchangers phes were introduced to meet the hygienic. Flow distribution in plate heat exchangers and consequences on thermal and. The present book concerns plate heat exchangers phes, which are one of the. Flexibility changes can be made to heat exchanger performance by utilizing a wide range of fluids and conditions that can be modified to adapt to the various design specifications. The optimal design of a multipass plate andframe heat exchanger with mixed grouping of plates is considered. In this chapter we will examine the basic theory of heat exchangers and consider many applications. Design considerations for plate type heat exchanger. Heat exchanger design handbook mechanical engineering. The present book concerns plate heat exchangers phes, which are one of the most common types in practice.
That is, th e design of a twofluid heat exchanger used for the purposes of. Alfa laval aq4 alfaqtm ahricertified plate heat exchanger. Pdf download sadik kakac, hongtan liu and anchasa pramuanjaroenkij by heat exchangers. Understanding heat exchangers types, designs, applications and. I have been reading about phes, however i have not come across any methods for calculating the number of plates required in phes. A heat exchanger follows this principle in its endeavour to reach equalisation. Connections holes matching the piping lead through the frame plate, permitting the media to enter into the heat. 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 same heat transfer capacity. Incropera 19 doublepipe heat exchangers fundamentals of heat and mass transfer, 6th edition.
In alfa laval plate heat exchangers, heat is transferred from one medium to another through thin metal plates which have been pressed into a special pattern. For use with aggressive media, nickel braze can also be used. Pdf heat exchanger design handbook matt pennington. Fundamentals of heat exchanger design download ebook pdf.
Optimal design of plateandframe heat exchangers for. In design of sthe, you assume a value of u and perform iterations to see if the. A plate heat exchanger is a type of heat exchanger that uses metal plates to transfer heat between two fluids. Design and operation of heat exchangers springerlink. This content was uploaded by our users and we assume good faith they have the permission to share this book. The goal of heat exchanger design is to relate the inlet and outlet temperatures. Wiley also publishes its books in a variety of electronic formats.
Shah rochester institute of technology, rochester, new york. Besides basic concepts and thermal design of heat exchangers, inclusion of topics such as mechanical design, materials selection, fabrication, quality control and testing during heat exchanger manufacture is a speciality of this treatise. John richard thome ltcm sgm epfl heat transfer heat exchanger design 1er mars 2008 7 41. The effectiveness of a plate heat exchanger with a finite number of plates is affected by the end channels, and the channels between two adjacent passes. The plateandframe or gasketed plate heat exchanger essentially consists of a. The high efficiency and an outstanding reliability in a compact design, offers an investment with. Unit operations lab heat exchanger 12 theory notes 1. A unique, singlesource volume offering essential material on heat exchanger design in a unified approach suitable to many applications, fundamentals of heat exchanger design details an indepth thermal and hydraulic design theory underlying twofluid heat. Classification according to design or type tubular plate type extended surface regenerative phe spiral plate coil. Plate heat exchanger working principle, how a plate heat. Design a double pipe heat exchanger with bare inner multitubes that. In any process, it should be kept as close as possible to the design value, with a tolerance range established according to the available pumping power.
Plate andframe heat exchangers phes are used in many different processes at a broad range of temperatures and with a variety of substances. Calculate the required heat transfer rate, q, in btuhr from specified information about fluid flow rates and temperatures. The particular case of this process is heat transfer representing convective heat exchange between a moving medium and its interface with another medium, solid body, liquid or gas. The heat transfer plates are made in stainless steel and are brazed with copper as standard. Plate type heat exchangers are not widely used because of the inability to reliably seal the large gaskets between each of the plates. Plate heat exchanger literature survey and new heat transfer and pressure drop correlations for refrigerant evaporators. Welded, semiwelded and brazed heat exchangers are used for heat exchange between highpressure fluids or where a more compact product is required. Pdf heat exchangers are used to transfer heat between two sources. 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. Make an initial estimate of the overall heat transfer coefficient, u, based on the fluids involved. Numerous articles have been published regarding the advantages of compact heat exchangers.
The design of a heat exchanger is an exercise in thermodynamics, which is the. Shell and tube heat exchangers are used extensively throughout the process industry and as such a basic understanding of their design, construction and performance is important to the practising engineer. In addition, we will examine various aspects of heat exchanger design and analysis. Can someone please explain how the number of plates are calculated. Selection, rating, and thermal design written by sadik kakac, hongtan liu and anchasa pramuanjaroenkij is very useful for mechanical engineering mech students and also who are all having an interest to develop their knowledge in the field of design.
However, new improvements in gasket design and overall heat exchanger design have allowed some large scale applications of the plate type heat exchanger. Modeling and design of plate heat exchanger intechopen. Thus, the book will serve as a link between fundamental subjects men tioned and thermal engineering design practice in industry. With a plate type heat exchanger, the heat penetrates the surface, which separates the hot medium from the cold one very easily. Advantages and disadvantages of plate heat exchangers. The design and construction of the brazed plate heat exchangers are particularly compact and effi cient. This book is a compendium of several topics pertaining to the design of heat exchanger design.
The theory behind heat transfer plate heat exchangers. The endplate effect is reflected in a reduction of the temperature difference for heat transfer. Mechanical engineering, energy systems and sustainable development vol. The overall objectives are to present comprehensive descriptions of such heat exchangers and their advantages and limitations, to provide indepth thermal and hydraulic design theory for phes, and to present stateoftheart knowledge. In this work we present a theoreticalexperimental research on the thermal phenomena that the endplates present on the performance of the plate heat exchangers in a single step and with a u type configuration. Design optimization algorithm for plate heat exchanger. While the publisher and author have used their best e. The hisaka plate type heat exchanger has the excellent features as follows. Heat exchangers are important and used frequently in the processing, heat and. Our gasketed plate heat exchangers are optimizing heat transfer by large surfaces of corrugated plates drawing heat from one gas or liquid to the other.
The pressure drop is an important parameter that needs to be considered in the design and optimization of a plate heat exchanger. Copper brazed plate heat exchangers are pressure resistant up to 30 bar. Click download or read online button to get fundamentals of heat exchanger design book now. Calculating number of plates in plate heat exchangers. Heat exchangers are devices that transfer energy between fluids at different temperatures by heat transfer. Thermal design during heat exchanger design often overall heat transfer coefficient is used that connects the rate of heat transfer to the temperature difference of the system.
The plate heat exchanger phe is a specialized design well suited to transferring heat between medium and lowpressure fluids. Theory and selection heat exchangers are devices that transfer heat between two luids. The book is an excellent resource for mechanical, chemical, and. Design improvements of a shell and tube heat exchanger based on practical experience. Types of heat exchangers shell and tube, plate type. This is due to the larger area the plates provide over tubes. Unlike other types of heat exchanger on which design procedure data is available, the designing of plate heat exchanger is a monopoly of certain manufacturing companies. Briefly, their higher heat transfer coefficients, compact size, ease of service, cost effectiveness, and their unique ability to handle fouling fluids make compact exchangers a. Part of the eurotherm seminars book series eurotherm, volume 18. Containing invited contributions from prominent and active investigators in the area, it should enable graduate. Heat exchanger design handbook pdf free download epdf.
This in turn produces a high overall heat transfer coefficient due to the heat transfer associated with the narrow passages and corrugated surfaces. Therefore a plate type heat exchanger, as compared to a similarly sized tube and shell heat exchanger, is capable of transferring much more heat. Subscripts h and c refer to the hot and cold fluids, respectively, and subscripts i and o refer to the inlet and outlet of the heat exchanger, respectively. This has a major advantage over a conventional heat exchanger in that the fluids are exposed to a much larger surface area because the fluids spread out over the plates. E1mnl032a design and rating of shell and tube heat. Actually, this step is going to determine physical properties and shape of the heat exchanger. Research into phes has increased considerably in recent years and this is a compilation of knowledge on the subject. A heat exchanger is a device that is used to transfer thermal energy enthalpy between two or more fluids, between a solid surface and. Basic theory and applications, second edition, revised and ex panded, earl. The objective of this paper is to optimize the design of plate heat exchanger by reducing its number of plates. Calculating number of plates in plate heat exchangers posted in student. Standard design the plate heat exchanger consists of a pack of corrugated metal plates with portholes for the passage of the two fluids between which heat transfer will take place. Plate type heat exchanger design linkedin slideshare. Pdf a heat exchanger is a heat transfer device that exchanges heat between two or more process fluids.158 1219 1526 1448 726 902 1600 1308 825 858 1229 701 903 784 307 853 732 1628 521 1568 468 106 46 806 317 1425 1538 1307 1239 343 1438 1154 770 380 1223 220 308 445 1408