Although the necessary equations for heat transfer and the pressure drop in a double pipe heat exchanger are available, using these equations the optimization of the system cost is laborious. The double pipe heat exchanger is one heat exchanger pipe inside another larger pipe for either counter flow or parallel flow pattern. The most widely used double pipe heat exchanger is the hair pin. Therefore, it can not be classified as a compact heat exchanger. A double pipe heat exchanger also sometimes referred to as a pipeinpipe exchanger is a type of heat exchanger comprising a tube in tube structure. Fin construction details section of a double pipe heat exchanger.
To study and evaluate the effects of flow conditions and flow configurations on the rate of heat transfer through thin walled tubes. Double pipe heat exchangers are the simplest exchangers used in industries. Heat transferheat exchangers blogs engineering excel templates. In this case, two types of heat exchangers are introduced, known as process and. Doublepipe shellandtube spiral tube pipe coils crossflow to tubes parallel flow to tubes platefin tubefin ordinary separating wall heatpipe wall rotary fixedmatrix rotating hoods. Tech student 2assistantprofessor 1,2talla padmavathi college of engineering, warangal, telangana abstract heat exchangers with the convective heat transfer of fluid inside the tubes are frequently used in many engineering applications. Application of second law analysis in heat exchanger. Hi i wish to design a double pipe heat jacketed heat exchanger by using htri. This includes articles in the clickable categories below. Heat exchangers are used in industrial processes to recover heat between two process fluids. 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 double pipe heat exchanger.
The amount of heat transfer per section is small, that makes the double pipe heat exchangers a suitable heat transfer device in. The pressure of tube is around 150 bar and the pressure of annulus fluid is 10 bar and both in the liquid phase. 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 exchanger is one of the important devices in cooling and heating process in factories, buildings, transports and others. The theories of transient heat transfer in doublepipe heat exchangers were explained and followed by literature correlations. Double pipe heat exchanger design free download double. Pdf the double pipe heat exchanger is one heat exchanger pipe inside another larger. Design of doublepipe heat exchanger posted in chemical process simulation.
May 14, 2016 a procedures manual was created for the double pipe heat exchanger. Cfd analysis on performance of double pipe two pass heat exchanger m. Cfd analysis on performance of double pipe two pass heat. To determine the overall heat transfer coefficient for the double pipe heat exchanger for countercurrent flow and parallel or cocurrent flow.
They are widely used in space heating, refrigeration, air conditioning, power stations, chemical plants, petrochemical plants, petroleum. Todays lecture lab teams and schedules double pipe heat exchanger 3. Design of doublepipe heat exchanger chemical process. The wall of the inner pipe is the heat transfer surface. Qualitative dependence of the fluid temperature on position inside a singlepass heat exchanger is shown in fig. Double pipe heat exchangers have a simple construction.
The high stresses produced by differential thermal expansion between outer and inner pipes are more easily handled. Introduction to heat exchangers bengt sunden lund institute of technology. Double pipe heat exchanger design with counterflow or. Double pipe heat exchangers often also referred to as double pipes are characterized by a construction form which imparts a ushaped appearance to the heat exchanger. 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. The fluids may be separated by a solid wall to prevent mixing or they may be in direct contact. Dec 21, 2014 here you will find informational articles on topics related to the excel spreadsheets for civil and mechanical engineering calculations available from the downloads page. Double pipe heat exchanger is perhaps the simplest of all heat exchanger types. What are practical applications of double pipe heat exchanger. Double tube heat exchangers are designed whereby one tube is concentrically positioned within a larger tube. The amount of heat transfer per section is small, that makes the double pipe heat exchangers a. In its simplest form, the double pipe heat exchanger, also known as a concentric pipe, hairpin, jacked pipe and jacketed utube heat exchangers, consists of a single tube mounted inside another.
In doublepipe exchangers, one fluid flows inside a pipe, and the other fluid flows in the vicinity between the outer pipe and the inner. This example studies the cooling of hot oil c by a cool oil 60c entering in countercurrent. The software will do all the thermal calculations involved in the design and will generate a summary of all resultsetc. Double pipe heat exchanger animation heat exchanger animation duration. Doublepipe exchangers is the generic term covering a range of jacketed u tube exchangers normally operating in countercurrent flow of two types. Background a heat exchanger is a heat transfer device whose purpose is the transfer of energy from one moving fluid stream to another moving fluid stream. Chapter 11 heat exchangers objectives when you finish studying this chapter, you should be able to. The area density for double pipe heat exchanger can not be in the order of 700.
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. Products double pipe heat exchangers heat transfer. The overall heat transfer characteristics of a double pipe. This thesis investigates the effects of fouling in a double pipe heat exchanger. They are fairly cheap, but the amount of space they occupy is generally high compared with the other types. One fluid in a doublepipe heat exchanger flows through the smaller pipe while the other fluid flows through the annular space between the two pipes.
Heattransfer analysis of doublepipe heat exchangers for indirectcycle scw npp by harwinder thind a thesis submitted in partial fulfillment of the requirements for the degree of master of applied science nuclear engineering the faculty of energy systems and nuclear science university of ontario institute of technology april, 2012. Download as docx, pdf, txt or read online from scribd. Hot in hot out cold in cold out a parallel flow in cold out cold in b counter flow cold fluid hot fluid hot fluid cold fluid t t. Optimum design of double pipe heat exchanger sciencedirect. Design of small heat exchanger double pipe type mohamad shafiq bin alias thesis submitted in fulfillment of the requirements for the award of the degree of. Double pipe heat exchanger design requires use of the heat transfer rate, the log mean temperature difference, and an estimate of the overall heat transfer coefficient to calculate the estimated heat transfer surface area. Double pipe exchangers is the generic term covering a range of jacketed u tube exchangers normally operating in countercurrent flow of two types. Therefore the authors of this publication tried to combine these average data. 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. The design stages mentioned in the literature can applicable for all the simple designing of double pipe heat exchangers. Pdf design of double pipe heat exchanger kirti zare. We have examined the final copy of this project and in our opinion.
The nanofluids consist of al 2 o 3 and tio 2 nanoparticles, which were added to the base fluid deionized. Three partial differential equations describe heat balances across the tube and shellside liquids, and a heat balance across the tubewall taking into account the heat flow from the shell and. The design and analysis of the double pipe heat exchanger has been a great success. Double pipe heat exchangers free download as word doc. In numerous heat exchangers, the fluids are differentiated by a heat transfer surface, and in a perfect world they dont blend or break. A double pipe heat exchanger consists of one pipe inside another. The software will do all the thermal calculations involved in the design and will generate a summary of all results. Pdf experimental investigation of double pipe heat.
One fluid flows in the inner pipe, while a second fluid flows in the outer pipe annuals. The area density for doublepipe heat exchanger can not be in the order of 700. Heat exchangers comparison compare different heat exchangers. Heat exchangers are devices used to transfer heat between two or more fluid streams at different. Fouling of a double pipe heat exchanger antonio llinares. Although the necessary equations for heat transfer and the pressure drop in a double pipe heat. Experimental investigation of doublepipe heat exchangers. In an excel spreadsheet for thermal design of a double pipe heat exchanger.
In triple pipe heat exchangers, a thermal fluid is passed through an inner annular space and heat. Heat exchangers are used in both cooling and heating processes. Doublepipe heat exchanger introduction this application models the temperature dynamics of a countercurrent double pipe heat exchanger. Double pipe heat exchanger ce 328 spring 2003 objective. A heat exchanger is a system used to transfer heat between two or more fluids. We certify that the project entitled design of small heat exchanger double pipe type is written by mohamad shafiq bin alias. Double pipe heat exchanger design consists of one pipe placed inside another pipe of a larger diameter with appropriate fittings to guide the flow from section to another. 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. It can be operated as a parallel flow or as a counterflow heat exchanger. In these exchangers one fluid flows inside the tube and the other fluid flows on the outside. Double pipe heat exchangers are also known as hairpin, jacketed pipe, jacketed utube and concentric pipe.
The heat exchanger is found in large construction to support cooling process such as fossil fuel power plant. Double pipe heat exchanger design step by step software. To demonstrate the basic equations of heat exchanger operation. To understand the basic operation of heat exchangers. Double pipe heat exchangers come into their own when. Single inner pipe formed into a removable u or element, with either. The theories of transient heat transfer in double pipe heat exchangers were explained and followed by literature correlations. Overall heat transfer coefficient for double pipe heat exchanger pump water through inner pipe of double pipe heat exchanger flow steam through outer pipe of double pipe heat exchanger allow to come to steady stat e monitor. It is called a double pipe exchanger because one fluid flows inside a pipe and the other fluid flows between that pipe and another pipe that surrounds the first. The analytical stage in this paper shows the validity of the design procedure mentioned above. A procedures manual was created for the doublepipe heat exchanger. Double pipe heat exchangers, also known as double tube, double duct, or tubeintube heat exchangers, are considered one of the devices for passive heat transfer enhancement.
Doublepipe shellandtube spiral tube pipe coils crossflow to tubes parallel flow. As the name suggests, it consists of two pipes, one within the other. The multitube heat exchangers are similar in construction to the double pipe heat. Other approaches to control fouling control combine the blind application of.
Reason for heat exchangers a heat exchanger is a piece of equipment built for efficient heat transfer from. Overall heat transfer coefficient for doublepipe heat. In double pipe exchangers, one fluid flows inside a pipe, and the other fluid flows in the vicinity between the outer pipe and the inner pipe 22, 23, 24. Abstractthe triple concentric pipes heat exchanger is an improved version of double pipe heat exchanger.
Double pipe heat exchanger introduction this application models the temperature dynamics of a countercurrent double pipe heat exchanger. You are to consider three flow arrangements for a double pipe heat exchanger. A device whose purpose is the transfer of thermal energy between two fluids. Feb 21, 2017 one of the fluids is usually passed through pipes or tubes, and the other fluid stream is passed round or across these. Sizing of triple concentric pipe heat exchanger 1tejas m. Double pipe heat exchanger design dhex is a software tool that is made to demonstrate the chemical design calculations of double pipe hairpin heat exchangers. It is found that the addition of fins to such double pipe heat exchangers reduce the nusselt number. Heat transfer analysis of double pipe heat exchangers for indirectcycle scw npp by harwinder thind a thesis submitted in partial fulfillment of the requirements for the degree of master of applied science nuclear engineering the faculty of energy systems and nuclear science university of ontario institute of technology april, 2012. The fluid flows in the inner pipe is the tube side and in exchange another fluid flows in the outer pipe annulus. Double pipe heat exchanger design software hairpin heat.
Heat exchanger double pipe heat exchanger hot cold 5. A wide variety of double pipe heat exchanger price options are available to you, such as ce, ccc, and ul. Nov 22, 2012 design of double pipe heat exchanger posted in chemical process simulation. Laminar counter and parallel flows in a double pipe heat exchanger is studied experimentally using two types of nanofluids as a cooling medium. The heat exchange duty a llows calculation of the log mean. Flow in a doublepipe heat exchanger can be cocurrent or. This project work is based on design and thermal analysis of double pipe heat exchanger.
Experimental investigation of doublepipe heat exchangers in. One of the fluids is usually passed through pipes or tubes, and the other fluid stream is passed round or across these. Doublepipe heat exchangers, also known as doubletube, doubleduct, or tubeintube heat exchangers, are considered one of the devices for passive heat transfer enhancement. Doublepipe heat exchangers, with their typical uturn shape, are one of the simplest and cheapest type of heat exchangers used in the chemical process industry. The doublepipe heat exchanger is one of the simplest types of heat exchangers. Input and output temperatures of annulus and pipe are known. Double pipe heat exchangers are cheap for both design and maintenance, making them a good choice for small industries. Pdf the double pipe heat exchanger is one heat exchanger pipe inside another larger pipe for either counter flow or parallel flow pattern. Jun 08, 2016 how shell and tube heat exchangers work engineering duration. The double tube composition allows for unrestricted flow of product, making it the ideal heat exchanger for viscous products.
652 639 200 173 1394 464 542 786 177 402 277 477 210 215 43 15 232 788 769 175 830 1089 1087 697 1448 1277 882 390 553 791 1341 287 1098 155 351 778 970 99 1282 44 1366