In contrast to the parallel flow heat exchanger, the counter flow heat exchanger can have the hottest coldfluid. Qualitative dependence of the fluid temperature on position inside a singlepass heat exchanger is shown in fig. In an excel spreadsheet for thermal design of a double pipe heat exchanger, the heat exchanger equation can be used to calculate the required heat exchanger area for known or estimated values of the other three parameters, q, u, and. The two most common heat exchanger design problems are those of rating and sizing. Input and output temperatures of annulus and pipe are known. A practical guide for planning, selecting and designing of shell and tube exchangers takes users on a stepbystep guide to the design of heat exchangers in daily practice, showing how to determine the effective driving temperature difference for heat transfer. Calculates the length of a concentric counterflow heat exchanger using the same parameters as in sizing a heat exchanger. Heat exchanger gg heat exchanger for systems with two gas flows. Pdhonline course m371 2 pdh shell and tube heat exchangers. Shell and tube heat exchanger design in solidworks youtube. E1mnl032a design and rating of shell and tube heat. Products double pipe heat exchangers heat transfer. 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. If you continue browsing the site, you agree to the use of cookies on this website.
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 heat exchanger is found in large construction to support cooling process such as fossil fuel power plant. Make an initial estimate of the overall heat transfer coefficient, u, based on the fluids involved. Sep 28, 2017 for the love of physics walter lewin may 16, 2011 duration. Access the url below and click on the websimulator icon. Double pipe exchangers is the generic term covering a range of jacketed u tube exchangers normally operating in countercurrent flow of two types. Tube heat exchangers general heat exchanger design 1. One set of these tubes contains the fluid that must be either heated or. Each of those parameters will be discussed briefly in the next three sections. Heat exchanger and its types engineering solutions. Double pipe heat exchanger design with counterflow or.
Nov 22, 2012 design of double pipe heat exchanger posted in chemical process simulation. Yes, we provide the recommended values for tema design fouling resistances. Nxcad is the worlds leading 3d product development solution. Double pipe heat exchanger two sets of concentric pipes, two connecting tees, and a return head and a return bend. Calculate the required heat transfer rate, q, in btuhr from specified information about fluid flow rates and temperatures. Double click the heat exchanger model block to view the model details. Heat exchangers are used in industrial processes to recover heat between two process fluids. A primary advantage of a hairpin or double pipe heat exchanger is that it can be operated in a true counterflow pattern, which is the most efficient flow pattern. Thermal analysis of double pipe heat exchanger by changing. 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 exchanger g heat exchanger for systems with gas and controlled flows. Design of doublepipe heat exchanger chemical process. One fluid flows in the inner pipe, while a second fluid flows in the outer pipe annuals. The exchanger is modeled as a firstorder system with delay.
Design of double pipe heat exchanger posted in student. Double pipe heat exchanger design software hairpin heat. You can simulate the plate heat exchanger perfect for your needs, any time of the day, from anywhere. Heat transferheat exchangers blogs engineering excel templates. Counter flow heat exchangers are the most efficient of the three types. This constraint is used to tune the controller parameters. Design of doublepipe heat exchanger posted in chemical process simulation. The actual developer of the software is webbusterz engineering software. Is there a database or recommendations for the fouling factors. The model of ceramic heat exchanger was taken from the reference papers a theoretical analysis and cfd simulation on theceramic monolith heat exchanger. The hot water used in the shellandtube heat exchanger is produced by means of a double pipe heat exchanger. Doublepipe shellandtube spiral tube pipe coils crossflow to tubes parallel flow to tubes. The pressure of tube is around 150 bar and the pressure of annulus fluid is 10 bar and both in the liquid phase. Heat exchangers 73 individual thermal resistances of the system.
Double pipe heat exchanger calculation does the thermal and hydraulic design of double pipe heat exchangers and estimate number of hairpin required. The doublepipe heat exchanger is one of the simplest types of heat exchangers. We certify that the project entitled design of small heat exchanger double pipe type is written by mohamad shafiq bin alias. Double click the max temperature variation block to view constraints on the temperature variation of the heat exchanger.
Read on for information about the use of an excel spreadsheet for preliminary heat exchanger design calculations. This excel spreadsheet helps you design a double pipe heat exchanger also known as a concentric tube heat exchanger. Setting shell side and tube side pressure drop design limits. 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.
The inner pipe is a suction pipe of the pump in which hot hydrocarbon flows and in outer annulus cold crude oil passes from opposite direction. Hi i wish to design a double pipe heat jacketed heat exchanger by using htri. The image shows only the beginning of the calculations. Tech 1 pg scholar, department of thermal, mlr institute of technology, ranga reddy, telangana, india. 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. A heat exchanger thermal design calculations spreadsheet.
Heat exchanger gtl heat exchanger for systems with gas and thermal liquid flows. The double pipe heat exchanger is one heat exchanger pipe inside another larger pipe for either counter flow or parallel flow pattern. The heat exchange duty a llows calculation of the log mean. Double pipe heat exchanger design calculations john andrew kane p. In this arrangement a cold fluid flows through a pipe in the center of the apparatus and is heated by a hot fluid on the outside of that pipe. That is, it will give the highest overall heat transfer coefficient for the double pipe heat exchanger design. Heat exchanger for systems with fluids susceptible to phase change. Chemical engineering calculations to assist process, plant operation and maintenance engineers. 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. 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 free download and. The heat recovery from hot fluid is used to increase the temperature of cold.
Pdf design of double pipe heat exchanger kirti zare. Design of double pipe heat exchanger student cheresources. The optimum thermal design of a shell and tube heat exchanger involves the consideration of many interacting design parameters which can be summarized as follows. 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 exchanger design free version download. The 3d model of the ceramic heat exchanger is created using nxcad software from the 2d drawings. Design and experimental analysis of spiral tube heat exchanger 38 fig. Each cad and any associated text, image or data is in no way sponsored by or affiliated with any company, organization or realworld item, product, or good it may purport to portray. Fluid engine oil sea water inlet temperature, c 65 20 outlet temperature, c 55 25 heat load, kw 117. Checalc chemical engineering calculations to assist process, plant operation and maintenance engineers. Doublepipe heat exchanger doublepipe heat exchanger loading. 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 free to try webbusterz engineering software windows 98me2000xpvista7 version 2. Karl ponweiser institute for thermodynamics and energy conversion vienna university of technology vienna, austria published by wseas press. The double pipe heat exchanger is one of the simplest types of heat exchangers.
Design and rating of shell and tube heat exchangers page 4 of 30 mnl 032a issued 29 august 08, prepared by j. The software will do all the thermal calculations involved in the design and will generate a summary of all results. The computeraided design cad files and all associated content posted to this website are created, uploaded, managed and owned by. However, since double pipe heat exchangers are simple, they are used to teach heat exchanger design basics to students as the fundamental rules for all heat exchangers are the same. Dec 21, 2014 if you want to obtain an excel spreadsheet for preliminary design of double pipe andor shell and tube heat exchangers, click here to visit our download page. In contrast to the parallel flow heat exchanger, the counter flow heat exchanger can have the hottest coldfluid temperature greater than the coldest hotfluid temperatue. Toluene will be cooled from 160 to 100 the specific gravities at 68. Single inner pipe formed into a removable u or element, with either. 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. Fired heaters the selection of a heat exchanger depends on many factors including capital and. The entire analysis has been done by selecting an existing design of a double pipe heat exchanger with specified flow conditions at the inlet to the heat exchanger.
Chapter 5 heat exchangers faculty of engineering and. Problem statement it is desired to heat 5 kghr of cold benzene from 80 to 120. This example studies the cooling of hot oil c by a cool oil 60c entering in countercurrent. What are practical applications of double pipe heat. The theories of transient heat transfer in doublepipe heat exchangers were explained and followed by literature correlations. Mar, 20 calculates the length of a concentric counterflow heat exchanger using the same parameters as in sizing a heat exchanger. Explains the detailed heat exchanger method in aspen plus. We have examined the final copy of this project and in our opinion. 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.
Doublepipe heat exchanger 3d cad model library grabcad. Double pipe heat exchanger design step by step software. Heat exchanger design free download as powerpoint presentation. A procedures manual was created for the doublepipe heat exchanger. Double pipe heat exchangers come into their own when. The computeraided design cad files and all associated content posted to this website are created, uploaded, managed and owned by third party users. Design, analysis and fabrication of shell and tube heat. They have a particular advantage when close temperature approaches are needed or in high pressure applications. Doubleclick the heat exchanger model block to view the model details. 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. 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.
The screenshot below shows a heat exchanger thermal design calculations spreadsheet that can be used to carry out thermal design of a double pipe heat exchanger. Hisaka websimulator hws plate heat exchanger this is the. Design a double pipe heat exchanger with bare inner multitubes that can be used to cool engine oil with cold sea water. Combining each of these resistances in series gives. Pdf design of double pipe heat exchanger kirti zare, dipika kanchan, and nupur patel academia. Process fluid assignments to shell side or tube side. Shell and tube heat exchangers consist of series of tubes. The software will do all the thermal calculations involved in the design and will generate a summary of. Jul 11, 2017 cfd analysis of double pipe heat exchanger for basic understanding slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising.
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