The software will do all the thermal calculations involved in the design and will generate a summary of. So its economical to design a double pipe heat exchanger for this. I am new to this website, i wanted to share a few spreadsheets, dont know whether this where i should share the file or not. Classification according to flow arrangements singlepass multipass counter flow parallel. The double pipe heat exchanger is one heat exchang er p ipe inside another larger pipe for either counter flow or parallel flow pattern. It consists of concentric pipes separated by mechanical closures. Shell and tube heat exchangers page 5 of 30 mnl 032a issued 29 august 08, prepared by j. Doublepipe heat exchanger doublepipe heat exchanger loading. Heat exchanger is a device for transferring heat from one medium to another. 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, or between solid particulates and a fluid, at different temperatures and in thermal contact. Thermal analysis of double pipe heat exchanger by changing.
As the oils flow through the system, the material properties of both change with. All about double pipe heat exchangers what you need to know. Pdf design of double pipe heat exchanger kirti zare. Heat exchangers seminar heat exchanger chemical engineering. Double pipe heat exchanger calculation does the thermal and hydraulic design of double pipe heat exchangers and estimate number of hairpin required. The horizontal double pipe heat exchanger is made from galvanised iron tube with inner tube and outer tube. May 05, 2020 these styles of double pipe may have a bundle of inner tubes rather than a single tube and the limits on these styles are the number of tubes less than 30 tubes and the diameter of the outer pipe tube is less than 200 mm. Double pipe heat exchanger design with counterflow or. 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 shell and tube heat exchanger is more efficient as it can have multiple passes for the fluid to stay longer in contact with heating material fluid in this case. Double pipe heat exchanger design free download and. Experimental investigation of doublepipe heat exchangers. The theories of transient heat transfer in doublepipe heat exchangers were explained. 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.
Cfd analysis of double pipe counter flow heat exchanger. Combining each of these resistances in series gives. This example studies the cooling of hot oil c by a cool oil 60c entering in countercurrent. A procedures manual was created for the doublepipe heat exchanger. For example, the hydraulic diameter for an annulus of a doublepipe heat exchanger for q and. Jun 08, 2016 how shell and tube heat exchangers work engineering duration. Experimental investigation of doublepipe heat exchangers in air. 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. Heat transfer and flow behavior analysis of double pipe heat. Double pipe heat exchangers are also known as hairpin heat exchangers. Overview a typical double pipe heat exchanger is shown in figure 4.
The doublepipe heat exchanger is one of the simplest types of heat exchangers. One fluid flows in the inner pipe, while a second fluid flows in the outer pipe annuals. 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. 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. Doublepipe exchangers is the generic term covering a range of jacketed u tube exchangers normally operating in countercurrent flow of two types. Double pipe heat exchangers are the simplest recuperators in which heat is transferred from the hot fluid to the cold fluid through a separating cylindrical wall. The heat exchange duty allows calculation of the log mean. It can be operated as a parallel flow or as a counterflow heat exchanger. Information from its description page there is shown below. These styles of double pipe may have a bundle of inner tubes rather than a single tube and the limits on these styles are the number of tubes less than 30 tubes and the diameter of the outer pipetube is less than 200 mm. They have a particular advantage when close temperature approaches are needed or in high pressure applications. 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 fluid, at differing temperatures and in thermal contact, usually without external heat and work interactions.
Double pipe heat exchangers are the simplest exchangers used in industries. In its classical sense, the term double pipe refers to a heat exchanger consisting of a pipe within a pipe. 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. The modules listed in the overview are linked to the corresponding pages. Optimum design of double pipe heat exchanger sciencedirect. Essentially, it consists of one pipe placed concentrically inside another one of larger diameter, with appropriate end fittings on each pipe to guide the fluids from one section to the next. Pdf on jan 1, 2018, mate petrik and others published optimal design of doublepipe heat exchangers find, read and cite all the research you need on. Carbon steel copper inconel monel nickel stainless steel. Design a double pipe heat exchanger with bare inner multitubes that can be used to cool engine oil with cold sea water. Double pipe heat exchanger ce 328 spring 2003 objective. Doublepipe heat exchanger 3d cad model library grabcad. 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. Example of a double pipe heat exchanger in real life.
Jan 23, 20 double pipe heat exchanger two sets of concentric pipes, two connecting tees, and a return head and a return bend. On the other hand, their low efficiency coupled with the high space occupied in large scales, has led modern industries to use more efficient. The software will do all the thermal calculations involved in the design and will generate a summary of all results. 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. Plate type heat exchangers are not widely used because of the inability to reliably seal the large gaskets between each of the plates. 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. Doublepipe shellandtube spiral tube pipe coils crossflow to tubes parallel flow to tubes platefin tubefin ordinary separating wall heatpipe wall rotary fixedmatrix rotating hoods. This excel spreadsheet helps you design a double pipe heat exchanger also known as a concentric tube heat exchanger. Qualitative dependence of the fluid temperature on position inside a singlepass heat exchanger is shown in fig. In most heat exchangers, the fluids are separated by a heat transfer surface, and ideally they do not mix.
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. Multitube hairpin heat exchanger posted in process heat transfer. As i understand, the double pipe heat exchanger has two fluids and one or two solids for the pipe material. Heat exchanger seminar ppt with pdf report heat exchangers are found widely scattered throughout the food process industry. Longer contact time and higher heat exchange surface area allows greater heat tran.
This portable document format \ pdf \ file contains bookmarks, thumbnails, and hyperlinks to help you navigate through the document. 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. How shell and tube heat exchangers work engineering duration. Double pipe heat exchangers have a simple construction. In its classical sense, the term double pipe refers to a. Tube heat exchangers general heat exchanger design 1. Typically double pipe heat exchangers are designed to provide counter current flow and they are used for low heat duties.
On one hand, these heat exchangers are cheap for both design and maintenance, making them a good choice for small industries. They are fairly cheap, but the amount of space they occupy is generally high compared with the other types. Double pipe heat exchanger design software hairpin heat. Heat exchangers are used in industrial processes to recover heat between two process fluids.
Double pipe heat exchanger cfd online discussion forums. There is a case that the duty of exchanger is lower than 500 kw and the area required is lower than 300 squered feet. The outer diameter of the heat exchanger is around 1. Commons is a freely licensed media file repository. Enter doublepipeworkbench in file name as a name of your workbench and click on save button. Inexpensive, rugged and easily maintained, they are primarily adapted to hightemperature, highpressure applications. This system will either have parallel or countercurrent flow. Yes, we provide the recommended values for tema design fouling resistances. Heat exchanger and its types engineering solutions. Is there a database or recommendations for the fouling factors. This project work is based on design and thermal analysis of double pipe heat exchanger. Shell and tube heat exchangers page 6 of 30 mnl 032a issued 29 august 08, prepared by j. To study and evaluate the effects of flow conditions and flow configurations on the rate of heat transfer through thin walled tubes. There are many types of heat exchangers applied in the process industry.
The complexity of the doublepipe heat exchanger design, especially their geometry and fluid flow patterns, puts several solution constrains. Double pipe heat exchangers are the simplest heat transfer devices. Flow in a doublepipe heat exchanger can be cocurrent or. Our single tube heat exchangers are tailored for individual applications and are available in a wide range of materials. In other heat exchangers, heat transfer between fluids takes place through a separating wall or into and out of a wall in a transient manner. E1mnl032a design and rating of shell and tube heat. Chapter 5 heat exchangers faculty of engineering and. A double pipe heat exchanger consists of one pipe inside another. Flow in a double pipe heat exchanger can be cocurrent or. Pdf download sadik kakac, hongtan liu and anchasa pramuanjaroenkij by heat exchangers.
The amount of heat transfer per section is small, that makes the double pipe heat exchangers a suitable heat transfer device in. Abstract an orthogonal expansion technique for solving a new class of counterflow heat transfer problems is developed and applied to the detailed study of. Fluid engine oil sea water inlet temperature, c 65 20 outlet temperature, c 55 25 heat load, kw 117. The total heat transfer area to be provided is around 6.
This product is designed to do thermal calculations and design for this type of heat exchangers. To get a better idea on what a doublepipe heat exchanger is, it is just one pipe inside another larger pipe. Products double pipe heat exchangers heat transfer. The overall heat transfer characteristics of a double pipe. Double pipe heat exchangers are also known as hairpin, jacketed pipe, jacketed utube and concentric pipe. Dear all, as we know, there are some rules to use double pipe heat exchanger instead of shell and tube heat exchanger. Heat exchangers 73 individual thermal resistances of the system. One fluid will flow through the inside pipe and the other flows through the annulus between the two pipes. This article presents an understanding of what double pipe heat exchangers are and how they work. The double pipe heat exchanger is one heat exchanger pipe inside another larger pipe for either counter flow or parallel flow pattern. It is a device that is used to transfer thermal energy from one body or fluid stream to another. The computeraided design cad files and all associated content posted to this website are created, uploaded, managed and owned by. There are two concentric pipes with different diameters. A device whose purpose is the transfer of slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising.
Air fin coolers, air preheater and air dryer represent the optimal solution in design of processes to operate more efficiently and to reduce operating costs. Heat exchangers may be classified according to transfer process, construction, flow arrange ment, surface compactness, number of fluids and heat transfer mechanisms as shown in fig. The heat exchange duty a llows calculation of the log mean. Double pipe heat exchanger two sets of concentric pipes, two connecting tees, and a return head and a return bend. The default working environment for geometry is 3d. Doublepipe heat exchangers, also known as doubletube, doubleduct, or tubeintube heat exchangers, are considered one of the devices for passive heat transfer enhancement. Experimental investigation of doublepipe heat exchangers in. The double pipe heat exchanger is one of the simplest types of heat exchangers. To determine the overall heat transfer coefficient for the double pipe heat exchanger for countercurrent flow and parallel or cocurrent flow. In doublepipe exchangers, one fluid flows inside a pipe, and the other fluid flows in the vicinity between the.
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. Because of this problem, plate type heat exchangers have only been used in small, low pressure applications such as on oil coolers for engines. Checalc chemical engineering calculations to assist process, plant operation and maintenance engineers. Which is more efficient, shell and tube heat exchangers or. Double pipe heat exchanger design dhex software features. Heat exchangers are devices that exchange the heat between two fluids. Double pipe heat exchanger design step by step software.
741 1462 258 1247 126 169 1503 147 705 1436 586 380 627 1255 9 221 1046 414 312 385 242 1292 1222 805 1462 942 277 1414 1064 18 1137 822 1285 1146 1430 758 536 599