Double tube heat exchangers are designed whereby one tube is concentrically positioned within a larger tube. Heat exchangers are used in both cooling and heating processes. They are widely used in space heating, refrigeration, air conditioning, power stations, chemical plants, petrochemical plants, petroleum. The double pipe heat exchanger is one heat exchanger pipe inside another larger pipe for either counter flow or parallel flow pattern. As the name suggests, it consists of two pipes, one within the other. Double pipe heat exchangers have a simple construction. 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.
Experimental investigation of doublepipe heat exchangers in. Todays lecture lab teams and schedules double pipe heat exchanger 3. The high stresses produced by differential thermal expansion between outer and inner pipes are more easily handled. The pressure of tube is around 150 bar and the pressure of annulus fluid is 10 bar and both in the liquid phase. Overall heat transfer coefficient for doublepipe heat. A heat exchanger is a system used to transfer heat between two or more fluids. The design stages mentioned in the literature can applicable for all the simple designing of double pipe heat exchangers. Chapter 11 heat exchangers objectives when you finish studying this chapter, you should be able to. Double pipe heat exchanger design with counterflow or. Design of doublepipe heat exchanger chemical process. The theories of transient heat transfer in doublepipe heat exchangers were explained and followed by literature correlations. 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. 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. Pdf experimental investigation of double pipe heat.
Heat exchangers are used in industrial processes to recover heat between two process fluids. Introduction to heat exchangers bengt sunden lund institute of technology. 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. Products double pipe heat exchangers heat transfer. Double pipe heat exchanger design step by step software. Double pipe heat exchanger design free download double. In these exchangers one fluid flows inside the tube and the other fluid flows on the outside. Cfd analysis on performance of double pipe two pass heat. The overall heat transfer characteristics of a double pipe. 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 double pipe heat exchanger hot cold 5. Hi i wish to design a double pipe heat jacketed heat exchanger by using htri. 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. 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. Although the necessary equations for heat transfer and the pressure drop in a double pipe heat. What are practical applications of double pipe heat exchanger. Double pipe heat exchangers come into their own when. Heat transferheat exchangers blogs engineering excel templates. Experimental investigation of doublepipe heat exchangers. The most widely used double pipe heat exchanger is the hair pin. Fouling of a double pipe heat exchanger antonio llinares. The heat exchange duty a llows calculation of the log mean.
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 is perhaps the simplest of all heat exchanger types. 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. The area density for double pipe heat exchanger can not be in the order of 700.
One of the fluids is usually passed through pipes or tubes, and the other fluid stream is passed round or across these. A double pipe heat exchanger, into its simplest form is presently one pipe within another larger pipe. We have examined the final copy of this project and in our opinion. Therefore, it can not be classified as a compact heat exchanger. One fluid in a double pipe heat exchanger flows through the smaller pipe while the other fluid flows through the annular space between the two pipes. In numerous heat exchangers, the fluids are differentiated by a heat transfer surface, and in a perfect world they dont blend or break.
Sizing of triple concentric pipe heat exchanger 1tejas m. 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. In doublepipe exchangers, one fluid flows inside a pipe, and the other fluid flows in the vicinity between the outer pipe and the inner. In this case, two types of heat exchangers are introduced, known as process and.
Doublepipe heat exchanger introduction this application models the temperature dynamics of a countercurrent double pipe heat exchanger. The area density for doublepipe heat exchanger can not be in the order of 700. One fluid flows in the inner pipe, while a second fluid flows in the outer pipe annuals. Heat exchanger is one of the important devices in cooling and heating process in factories, buildings, transports and others. A double pipe heat exchanger consists of one pipe inside another. Fin construction details section of a double pipe heat exchanger. Double pipe heat exchanger introduction this application models the temperature dynamics of a countercurrent double pipe heat exchanger. Pdf the double pipe heat exchanger is one heat exchanger pipe inside another larger.
Heat exchangers comparison compare different heat exchangers. To determine the overall heat transfer coefficient for the double pipe heat exchanger for countercurrent flow and parallel or cocurrent flow. 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. The wall of the inner pipe is the heat transfer surface. 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. They are fairly cheap, but the amount of space they occupy is generally high compared with the other types. 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. Double pipe exchangers is the generic term covering a range of jacketed u tube exchangers normally operating in countercurrent flow of two types. Other approaches to control fouling control combine the blind application of. The design and analysis of the double pipe heat exchanger has been a great success. Input and output temperatures of annulus and pipe are known.
The software will do all the thermal calculations involved in the design and will generate a summary of all results. Double pipe heat exchanger animation heat exchanger animation duration. In triple pipe heat exchangers, a thermal fluid is passed through an inner annular space and heat. The doublepipe heat exchanger is one of the simplest types of heat exchangers. It can be operated as a parallel flow or as a counterflow 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.
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. This thesis investigates the effects of fouling in a double pipe heat exchanger. Flow in a doublepipe heat exchanger can be cocurrent or. Optimum design of double pipe heat exchanger sciencedirect. We certify that the project entitled design of small heat exchanger double pipe type is written by mohamad shafiq bin alias. This includes articles in the clickable categories below. 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. Demonstrate the double pipe heat exchangers calculations that are commonly involved in the design of your project using this application. This example studies the cooling of hot oil c by a cool oil 60c entering in countercurrent. To understand the basic operation of heat exchangers.
A wide variety of double pipe heat exchanger price options are available to you, such as ce, ccc, and ul. Double pipe heat exchangers free download as word doc. Single inner pipe formed into a removable u or element, with either. Laminar counter and parallel flows in a double pipe heat exchanger is studied experimentally using two types of nanofluids as a cooling medium. 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. Qualitative dependence of the fluid temperature on position inside a singlepass heat exchanger is shown in fig. Reason for heat exchangers a heat exchanger is a piece of equipment built for efficient heat transfer from. Double pipe heat exchangers are the simplest exchangers used in industries. Design of doublepipe heat exchanger posted in chemical process simulation. Abstractthe triple concentric pipes heat exchanger is an improved version of 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.
Application of second law analysis in heat exchanger. Jun 08, 2016 how shell and tube heat exchangers work engineering duration. Doublepipe heat exchangers, also known as doubletube, doubleduct, or tubeintube heat exchangers, are considered one of the devices for passive heat transfer enhancement. Double pipe heat exchanger ce 328 spring 2003 objective. 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. Doublepipe exchangers is the generic term covering a range of jacketed u tube exchangers normally operating in countercurrent flow of two types. The software will do all the thermal calculations involved in the design and will generate a summary of all resultsetc. Download as docx, pdf, txt or read online from scribd. In an excel spreadsheet for thermal design of a double pipe heat exchanger.
You are to consider three flow arrangements for a double pipe heat exchanger. 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. A device whose purpose is the transfer of thermal energy between two fluids. What are practical applications of double pipe heat. The fluids may be separated by a solid wall to prevent mixing or they may be in direct contact. 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.
Pdf the double pipe heat exchanger is one heat exchanger pipe inside another larger pipe for either counter flow or parallel flow pattern. A procedures manual was created for the doublepipe heat exchanger. 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. Pdf design of double pipe heat exchanger kirti zare. 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. 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. Cfd analysis on performance of double pipe two pass heat exchanger m. 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. Heat exchangers are devices used to transfer heat between two or more fluid streams at different. 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. The amount of heat transfer per section is small, that makes the double pipe heat exchangers a suitable heat transfer device in. One fluid flows through the inside pipe and the further flows through the annulus between the two pipes.
Doublepipe shellandtube spiral tube pipe coils crossflow to tubes parallel flow. Double pipe heat exchangers are also known as hairpin, jacketed pipe, jacketed utube and concentric pipe. The multitube heat exchangers are similar in construction to the double pipe heat. The double pipe heat exchanger is one of the simplest types of heat exchangers.
The heat exchanger is found in large construction to support cooling process such as fossil fuel power plant. The theories of transient heat transfer in double pipe heat exchangers were explained and followed by literature correlations. To demonstrate the basic equations of heat exchanger operation. It is found that the addition of fins to such double pipe heat exchangers reduce the nusselt number. Doublepipe shellandtube spiral tube pipe coils crossflow to tubes parallel flow to tubes platefin tubefin ordinary separating wall heatpipe wall rotary fixedmatrix rotating hoods. 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. Therefore the authors of this publication tried to combine these average data. The amount of heat transfer per section is small, that makes the double pipe heat exchangers a. How shell and tube heat exchangers work engineering duration. 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.
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. The analytical stage in this paper shows the validity of the design procedure mentioned above. Nov 22, 2012 design of double pipe heat exchanger posted in chemical process simulation. Double pipe heat exchangers are cheap for both design and maintenance, making them a good choice for small industries. The nanofluids consist of al 2 o 3 and tio 2 nanoparticles, which were added to the base fluid deionized. May 14, 2016 a procedures manual was created for the double pipe heat exchanger. This project work is based on design and thermal analysis of double pipe heat exchanger.
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