This is to certify that the project entitled, design of compact plate fin heat exchanger submitted by jainender dewatwal in partial fulfilment of the requirements for the award of bachelor of technology, rourkela deemed university is an authentic work carried out by him under my supervision and guidance. Superchanger heat exchanger is designed to provide maximum efficiency. The plate and frame heat exchanger see figure 1 consists of a frame in which closely spaced metal plates are clamped between a head and follower. Advances in gasket and brazing technology have made the plate type heat exchanger increasingly practical.
The high turbulence also gives a selfcleaning effect. A plate type heat exchanger is a type of heat exchanger that uses metal plates to transfer heat between two fluids. Despite this substantial area for heat transfer, plate heat exchangers are usually relatively compact. The plates are compressed by bolts between fixed and movable frames, until metal to metal contact is reached and a channel is formed.
Simple or composite wall of some kind divides the two. A compact heat exchanger is a device characterized by a high heat transfer area per unit volume more than 300 m2m3. The lmtd method assumes that both inlet and outlet temperatures are known. Shell and tube heat exchangers are one of the most popular types of exchanger due.
Before any work begins ensure that the exchangers are pressureless and cooled. For gasketed plate heat exchangers please fill in the specification sheet in this brochure and send it to the technical sales department. The plate andframe heat exchanger design consists of stacked of corrugated plates which are bonded together. Brazed plate heat exchangers are small and compact and used preferably within the hvac industry and refrigeration industry.
Principles of heat exchangers simplified heat exchanger concepts heat exchangers work because heat naturally flows from higher temperature to lower temperatures. Plate heat exchanger working principle the plate heat exchanger consists of a frame, which consists of a head, follower, column, carrying bar, guiding bar, and a number of clamping bolts. They are widely used in space heating, refrigeration, air conditioning, power plants, chemical plants, petrochemical plants, petroleum refineries, natural gas processing and. In principle, all of our plate heat exchangers function similarly. Fluids flow in counterflow through the plate heat exchanger. Experimental study on thermal hydraulic performance of plate type heat exchanger applied in engine waste heat recovery. Working principle channels are formed between the plates and the corner ports are arranged so that the two media flow through alternate channels.
Funke offers a wide range of plate heat exchangers. This will affect the frequency and type of cleaning required. Bphebrazed plate heat exchangers and pheplate heat exchangers. A plate type heat exchanger, as illustrated in figure 2, consists of plates instead of tubes to separate the hot and cold fluids. Plate heat exchanger working principle, how a plate heat. Exchangers are initially oversized to allow for the fouling which gradually builds up during use until the exchanger is no longer capable of performing its duty. There are two basic types of plate heat exchangers. Plate heat exchanger 2 operation and maintenance manual.
This produces the highest possible heat transfer coefficients with the lowest possible pressure. Nov 14, 2000 in connection with maximum energy extraction from heat sources in heat pumps, a study has been made to determine how close to the freezing point it is possible to drive the system even to the extent of using the latent heat of freezing as an energy supply. Different types of heat exchangers are used on board a ship. The type of heat exchange used for a particular usage depends on the application and requirement. Therefore if a hot fluid and a cold fluid are separated by a heat conducting surface heat can be transferred from the hot fluid to the cold fluid. Bolt the connecting flange directly to the endplate using the drilled and. Plate fin heat exchangers have lots of thin metal plates or fins with a large surface area because that exchanges more heat more quickly.
Plate heat exchangers, heat exchanger, air cooled heat. Cleaning plate heat exchangers d epending upon the nature of the fluids involved and the application, the heat exchanger s performance level may decline over a period of time. Such bellows are often a source of weakness and failure in operation. The fluids may be separated by a solid wall to prevent mixing or they may be in direct contact. Jul 06, 2017 in this video we learn how a plate heat exchanger works, covering the basics and working principles of operation. The liquid to be heated or the heating, are totally seperated from each other with plates. Endplate gaskets that seal the first heat transfer plate against the fixed cover and in. They are generally an place full of packing and heat absorbent material. Turbulent flow help to reduce deposits which heat transfer, no extra space is required for dismantling in plate heat exchangers. Brazed heat exchanger general information the structure of plate heat exchanger. Pdf plate heat exchangers are used regularly in the heating.
Their compact stainless steel construction makes them an ideal choice for use with refrigerants or in food and beverage processing. The plate pack is assembled between a fix frame plate and. Using plate type heat exchangers as our core technology, we provide thermal solutions to our customers all over the world. There are different types of compact heat exchanger design available. Design principle the sondex type sl70 sls70 brazed heat exchanger contains a plate pack and will cover many duties up to 35 m3h 150 gpm in a single pass solution where all 4 connections are on the front side. It is, in theory, a low cost floating head design which allows access to the inside. The basics of aircooled heat exchangers chart industries. Cleaning heat exchanger plates with special chemicals. The principle of operation of the selfcleaning heat exchanger is shown in figure 1. These exchangers are composed of many thin, slightly separated plates that have very large surface areas and small fluid flow passages for heat transfer. In between front and rear frame, a number of plates are pressed together. Two of them are for heating liquid and two of them for heated liquid.
Typical heat transfer coefficients for aircooled heat exchangers. Therefore a plate type heat exchanger, as compared to a similarly sized tube and shell heat exchanger, is capable of transferring much more heat. High value for overall heat transfer coefficient, for the same two fluids, a flat plate heat exchanger typically has a u value much higher than either a shell and tube heat exchanger or a spiral heat exchanger. Fluids are a subset of the phases of matter and include liquidsgasesplasmas andto some extentplastic solids. 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. The heat is transferred through the plate between the channels, and complete countercurrent flow is created. This pdf presentation is designed to highlight the features and benefits of plate heat exchangers, both bare and packaged as opposed to other methods of heat transfer. Chapter 5 heat exchangers faculty of engineering and. When this is not the case, the solution to a heat exchanger problem becomes somewhat tedious. May 07, 2016 the basic structure of a plate heat exchanger consists of stainless steel plates, with different pressed patterns for turbulence, stacked together as in the image above. These are both very effective at transferring thermal energy, for even greater efficiency and compact design you can use micro plate heat exchangers for many applications. The plates are compressed by bolts between the fixed and movable frames, until metal to metal contact is reached and a channel is formed. It discusses the advantages and disadvantages of each type of help. The plates are fitted with a gasket which seals the interplate.
The heat transfer plates are made in stainless steel and are brazed with copper as standard. A hot medium fluid is first send to a temporary storage area called head storage area. Plate type heat exchanger advantages and disadvantages. Types of heat exchangers used on ship marine insight. Alfa laval plate technology 5 working principle the basic plate heat exchanger consists of a series of thin, corrugated plates that are gasketed or welded together or any combination of these depending on the liquids passing through and on whether it is practical to be able to subsequently separate the plates, for whatever reason. Nov 04, 2008 the heat exchanger itself is not constant. General features plate heat exchangers working principle plate heat exchangers are such devices that work with the principle of two different liquids making heat transfer in themselves. The results gained from these tests can be summarized. The liquid to be heated or the liquid heats, are totally seperated from each other with plates. The plates have corner ports and are sealed by gaskets around the ports and along the plate edges.
Plate heat exchanger general features working principle. 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. Steam on the end plate sidecold side in the shell and vent condenser designs are also. Tubular plate type extended surface regenerative phe spiral plate coil printed circuit. A heat exchanger is a piece of equipment built for efficient heat transfer from one medium to another. Plate heat exchanger applications general heating and cooling duties. Depending on the purpose for which the heat exchanger is needed, they may differ in configuration, structure and materials used. The hot and cold fluids alternate between each of the plates. This facilitates the transfer of heat, and greatly increases the speed of the temperature change. Gasketed plate heat exchangers hxxxliquid gasketed plate heat exchangers are particularly suitable for large fl ows and high cooling capacities.
One can easily show that thermodynamically, the most efficient heat exchanger is the counterflow heat exchanger figure 5. A plate heat exchanger is a type of heat exchanger that uses metal plates to transfer heat. Hisaka continues to supply reliable plate heat exchangers. This is due to the larger area the plates provide over tubes. Delivery of heat exchanger operating like it is new. Working principle plate heat exchangers working principle is to provide heat transfer between two liquids. 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 are spread out over the plates. Different types of heat exchangers are shown in figure 42. In between head and follower a varying number of pressed plates are clamped together. Process engineers and associates is a leading manufacturer of plate type heat exchanger. A heat exchanger is a special device that assists in heat transfer through one channel to another usually by conduction. Fast and detailed cleaning of heat exchanger plates. The selection of a heat exchanger depends on many factors including capital and operating costs, fouling, corrosion tendency, pressure drop, temperature ranges, and safety issues tolerance to leakage.
Plate and frame heat exchangers in the phe the plates create a frame where the plates are pressed with headers and tie bars, and the seal is guaranteed by gaskets. Plate heat exchangers consist of a stack of stamped heat exchange plates which are either. Plate heat exchanger, how it works working principle. A piece of equipment built for efficient heat transfer from one medium to another. 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. Heat exchangers doehdbk1018193 types of heat exchangers. The heat is transferred through the plate between the channels, and complete countercurrent flow is created for highest possible efficiency.
Plate heat exchanger theory phe structure and functional. Hvac heat exchangers explained the engineering mindset. Looking at the different types from gasket type, brazed plate type, welded type and micro plate type as well as their applications such as chillers, heat pumps, hvac, industrial, district energy, heat interface units etc. As the name implies, and as shown in figure 1, a thin, corrugated plate is used to transfer the heat from the. Pdf plate heat exchanger literature survey and new heat transfer.
Working principle a plate heat exchanger consists of a frame, which consists of a front cover,rear movable parts, carrying bar, guiding bar, and a number of tie bolts depending on the type of the plate heat exchanger. This deterioration in performance is typically due to the buildup of scale, sediment andor biological mass on the plates. In this article well be discussing the application of plate heat exchangers. The phe is composed of corrugated thin alloy plates, which are hung between top and bottom guide bars. Plate heat exchangers working principle is to provide heat transfer between two liquids. Inspection of unit at regular intervals and as frequently as experience indicates, an examination should be made of the interior and the exterior of the heat exchanger. Unit weight and surface per unit fan hp as a function of bundle depth. Weve covered all these heat exchangers in great detail previously. 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. Basically, in almost all applications, there is a solid barrier that prevents the media from mixing up with each other. Wcr plate corrugations are designed to achieve turbulence across the entire heat transfer area.
In this video we learn how a plate heat exchanger works, covering the basics and working principles of operation. The manner in which the gaskets are fitted enables. For use with aggressive media, nickel braze can also be used. Maintaining a plate heat exchanger and its related cost is not just a good idea it is a necessity for any successful business strategy concerned with its continued manufacturing productivity. Plate andframe heat exchangers are designed to optimize heat transfer because the corrugated plates provide by far the greatest surface area through which the heat can be drawn from one gas or liquid to the other.
Mit brazed plate heat exchangers can be designed with plates having different heat transfer charecteristics. Plate types aq4, aq4m and aq4d, double wall plates. Frame types fm, fg and fd working principle channels are formed between the plates and the corner ports are arranged so that the two media flow through alternate channels. Training in the purpose, use and care of plate heat exchangers purpose of the equipment plate heat exchangers phe, often called plateandframe heat exchangers, are used to change the temperature of a liquid, vapour or gas media. A plate heat exchanger is a type of heat exchanger that uses metal plates to transfer heat between two fluids. Plate type heat exchanger working principle, working.
A heat exchanger follows this principle in its endeavour to reach equalisation. Plate heat exchangers are such devices that work with the principle of two different liquids making heat transfer in themselves. 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. Principle the phe is composed of corrugated thin alloy plates, which are hung between top and bottom guide bars. Area of application a plate heat exchanger can be used wherever there should be heat transfer between two media. Plate heat exchanger applications the engineering mindset. The stack of heat transfer plates and gaskets is clamped together with bolts in a frame. Copper brazed plate heat exchangers are pressure resistant up to 30 bar, nickel brazed up to 10 bar. 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. Manuals for the hisaka plate heat exchanger consist of the following seven related documents.
Plate type heat exchanger working principle working experimental study on thermal hydraulic performance. To determine the overall heat transfer coefficient in a plate heat exchanger. Pdf the use of plate heat exchangers for energy saving. The use of plate heat exchangers for energy saving in phosphoric acid production. A heat exchanger is a system used to transfer heat between two or more fluids. The plate pack is assembled between a fix frame plate and a movable pressure plate and compressed by tightening bolts. Heat exchanger and its types engineering solutions.
It is safe to say that it would be rare to find someone in this industry that does not believe in having a plate heat exchanger maintenance strategy. Heat exchangers jordan university of science and technology. Parallelflow heat exchanger the heat exchanger is insulated from its surroundings, in which case the only heat exchange is between the hot and cold fluids. Plate heat exchangers are usually brazed or gasketed depending on the application and fluids being used. This pdf presentation is designed to highlight the. Quick startup and shutdown is a major cause of heat exchanger damage. The fouling liquid is fed upward through a vertical shell and tube exchanger. Plate heat exchanger, how it works working principle hvac. Due to the high heat transfer efficiency of the plates, plate type heat exchangers are usually very small when compared. The plate type heat exchanger is the most efficient type of heat exchanger with its low cost, flexibility, easy maintenance, and high thermal transfer. In standart plate heat exchangers, there are 4 inletoutlet ports. Production and supply of every type of nut and pin. This means that the plate heat exchanger can also be dismantled for cleaning and maintenance.
Plate type heat exchanger design calculation the plate heat exchanger is a specialized design well suited to transferring heat between medium and lowpressure fluids. Plate type heat exchanger design calculation, design. In table 1, all sensors test accuracies are listed. Potential and kinetic energy changes are negligible. Pdf a heat exchanger is a heat transfer device that exchanges heat between two or more process fluids. Unlike plate or shell and tube type heat exchanger it has an indirect mode of heat transfer. Process engineers and associates is a leading manufacturer of plate type heat exchanger in india used in various process industry. Plate heat exchanger is a kind of heat exchanger, which is made by pressing thin metal plates into corrugated heat exchanger plates, then stacking them and fastening them with splints and bolts. The most common change is a reduction in the heat transfer rate due to fouling of the surfaces. Plate type heat exchanger advantages and disadvantages advantages of plate type heat exchanger is a simple and compact in size. Plate type heat exchanger working principle a plate heat exchanger is a type of heat exchanger that uses metal plates to transfer heat. We will help you to find the appropriate plate heat exchanger for your specific application.
Heat exchangers are used in both cooling and heating processes. Another type of heat exchanger is the plate heat exchanger. There are two main types of plate heat exchangers, gasket type and brazed plate type. This is a video showing two pass flow in a plate type heat exchanger.
1163 752 674 482 1309 1056 575 231 1075 465 556 153 1331 5 1203 1398 529 1017 307 1314 572 224 1235 668 633 807 622 420 814 304 113 503 858 531 73 276 823 159 219 1497 662 522 139 1155 396