Heat exchanger design john richard thome 1er mars 2008 john richard thome ltcm sgm epfl heat transfer heat exchanger design 1er mars 2008 1 41. 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. A procedures manual was created for the doublepipe heat exchanger. Double pipe heat exchanger modeling comsol uses in. Alibaba manufacturer directory suppliers, manufacturers.
Mod07 lec33 design of shell and tube heat exchanger. The doublepipe heat exchanger is one of the simplest types of heat exchangers. Plate heat exchanger, how it works working principle hvac industrial engineering phx heat transfer duration. Diagram of a single node for a doublepipe heat exchanger. Overall heat transfer coefficient for double pipe heat exchanger calibrate thermocouples pump water through inner pipe of double pipe heat exchanger rate determined by rotameter flow steam through outer pipe of double pipe heat exchanger measure rate by pail and scale. 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. Dec 21, 2014 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 overall heat transfer characteristics of a double pipe. As a part of the process, milk is heated by water in a countercurrent double pipe heat exchanger. The theories of transient heat transfer in doublepipe heat exchangers were explained and followed by literature correlations. 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 theories of transient heat transfer in double pipe heat exchangers were explained and followed by literature correlations. Nov 22, 2012 design of double pipe heat exchanger posted in chemical process simulation. May 14, 2016 a procedures manual was created for the double pipe heat exchanger. Typical standard sizes, layout and overall dimensions are shown. 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. In this work includes heat transfer augmentation in the double pipe two pass counter flow heat exchanger using twisted tapes with water as working fluid. To demonstrate the basic equations of heat exchanger operation.
The temperature needs to be accurately regulated to provide the downstream unit operations with milk at the expected temperature and consistency. Double pipe heat exchanger excel calculation youtube. As indicated in figure 7, the double pipe exchanger consists of a pipe within a pipe. Aug 10, 2011 the basic heat exchanger design equation is. 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.
Design of doublepipe heat exchanger chemical process. Double pipe heat exchanger design step by step software. Checalc chemical engineering calculations to assist process, plant operation and maintenance engineers. This project work is based on design and thermal analysis of double pipe heat exchanger. They vary water flow rates and entrance temperatures to achieve new outcomes to study. To determine the overall heat transfer coefficient for the double pipe heat exchanger for countercurrent flow and parallel or cocurrent flow. They have a particular advantage when close temperature approaches are needed or in high pressure applications. 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 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. Mod08 lec34 introduction to evaporation and evaporators. Nowadays, heat exchanger becomes the prominent application for sensible cooling and sensible heating applications. Evaluation of the transient countercurrent double pipe heat exchanger with variable specific heat coefficient rehab noor mohammed alkaby babylon university college of engineering mechanical department abstract in this paper, the unsteady state heat transfer from countercurrent double pipe heat exchanger is presented. Doublepipe exchangers is the generic term covering a range of jacketed u tube exchangers normally operating in countercurrent flow of two types. Heat exchanger is one of the important devices in cooling and heating process in factories, buildings, transports and others.
The pressure of tube is around 150 bar and the pressure of annulus fluid is 10 bar and both in the liquid phase. A device whose purpose is the transfer of slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Heat transfer nptel online videos, courses iit video. 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. This excel spreadsheet helps you design a double pipe heat exchanger also known as a concentric tube heat exchanger. Double pipe 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 often also referred to as double pipes are characterized by a construction form which imparts a ushaped appearance to the heat exchanger. The most widely used double pipe heat exchanger is the hair pin. Axial heat flow along the tube wall was also modeled. Researchers have done theoretical as well as experimental analysis of triple concentric pipe heat exchanger.
Process fluid assignments to shell side or tube side. The high stresses produced by differential thermal expansion between outer and inner pipes are more easily handled. Todays lecture lab teams and schedules double pipe heat exchanger 3. Modeling and simulation of the double tube heat exchangers. Double pipe heat exchanger excel calculation douglas price. Hi i wish to design a double pipe heat jacketed heat exchanger by using htri.
An impressive list of information is available in relevant references for double pipe heat exchanger. Heat exchanger size is the critical criteria due to availability various heat transfer augmentation techniques. Double pipe heat exchanger, operations and applications. Overall heat transfer coefficient for doublepipe heat. We have considered the design of a double pipe heat exchanger in which its cost is optimized by considering three main parameters the inner and outer diameter of the heat exchanger and the flow rate of the utility. Double pipe heat exchanger ce 328 spring 2003 objective. The overall heat transfer characteristics of a double pipe heat exchanger. A device whose purpose is the transfer of thermal energy between two fluids. Each of those parameters will be discussed briefly in the next three sections. Fin construction details section of a double pipe heat exchanger.
Q the rate of heat transfer between the two fluids in the heat exchanger in buthr kjhr for s. This example studies the cooling of hot oil c by a cool oil 60c entering in countercurrent. 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. Jan 23, 20 double pipe heat exchanger two sets of concentric pipes, two connecting tees, and a return head and a return bend.
Heat exchangers design parameters for psus interviews by deepak. The heat exchanger is found in large construction to support cooling process such as fossil fuel power plant. One fluid flows in the inner pipe, while a second fluid flows in the outer pipe annuals. Design guide for heat exchanger piping pipingengineering. A double pipe heat exchanger consists of one pipe inside another. A food processing company is developing a new product with milk as a key ingredient. Heat exchangers are used in industrial processes to recover heat between two process fluids. Effect of pressure hot on temperature profile and fluid properties along length of doublepipe hx. To understand the basic operation of heat exchangers. Pdhonline course m371 2 pdh shell and tube heat exchangers.
Optimum design of double pipe heat exchanger sciencedirect. The primary objective in the thermal design of heat exchangers is to determine the necessary surface area required. Hemmat of mechanical engineering, shahid bahonar university of kernlan, iran abstract the single phase flow and thermal performance of a double pipe heat. The outer diameter of the heat exchanger is around 1. Figure 5 illustrates the spiral exchanger configuration. Cfd analysis on performance of double pipe two pass heat. Single inner pipe formed into a removable u or element, with either longitudinal fins or centralizing supports. Top 4 download periodically updates software information of double pipe heat exchanger design 3.
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 hot water flows in the inner tube in counter flow to the dowtherm, which flows in the annulus. The double pipe heat exchanger is one heat exchanger pipe inside another larger pipe for either counter flow or parallel flow pattern. Although the necessary equations for heat transfer and the pressure drop in a double pipe heat. This shows how to model water in a double pipe heat exchanger. John richard thome ltcm sgm epfl heat transfer heat exchanger design 1er mars 2008 6 41 the cross. It can be operated as a parallel flow or as a counterflow heat exchanger.
To study and evaluate the effects of flow conditions and flow configurations on the rate of heat transfer through thin walled tubes. Heat transferheat exchangers blogs engineering excel templates. Download double pipe heat exchanger design demonstrate the double pipe heat exchangers calculations that are commonly involved in the design of your project using this application. Double pipe heat exchanger design with counterflow or. Heat exchanger double pipe heat exchanger hot cold 5. 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 hot stream is conditioned prior to entering the heat exchanger by passing through a vertical, saturatedsteam jacketed, double pipe heat exchanger, while the. A heat balance on a typical control volume resulted in three differential equations one each for the tube and shellside liquids, and one to model the heat capacity of the tube wall. A wide variety of double pipe heat exchanger price options are available to you, such as ccc, ce, and rohs. The two most common heat exchanger design problems are those of rating and sizing. Double pipe heat exchanger calculation does the thermal and hydraulic design of double pipe heat exchangers and estimate number of hairpin required.
Double pipe heat exchangers come into their own when. Input and output temperatures of annulus and pipe are known. 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. Chapter 5 heat exchangers faculty of engineering and. What are practical applications of double pipe heat exchanger. A double pipe heat exchanger, into its simplest form is presently one pipe within another larger pipe.
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. Aloke kumar ghosal, department of chemical engineering, iit guwahati. Many researchers have performed the design and analysis of double pipe heat exchanger. Pdf design of double pipe heat exchanger kirti zare. Double pipe heat exchanger a double pipe heat exchanger of the dimensions shown in figure is employed to heat 5 kgsec of dowtherm a from 15c to 65c using waste hot water cooled in the process from 95c to 75c. These demands are the possibility of the change in fluid velocity, the ability to use different fluid processes, to have an easy way to get the inlet and outlet temperatures and to design a double pipe system. Design of doublepipe heat exchanger posted in chemical process simulation. 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. What are practical applications of double pipe heat. The design of the exchanger has been formulated as a geometric programming with a single degree of difficulty.
Qualitative dependence of the fluid temperature on position inside a singlepass heat exchanger is shown in fig. The objective of the present article is to present a physically based model for evaluating heat transfer and frictional loss for an internally and or externally finned double pipe heat exchanger. The wall of the inner pipe is the heat transfer surface. One fluid flows through the inside pipe and the further flows through the annulus between the two pipes. Products double pipe heat exchangers heat transfer. Hemmat of mechanical engineering, shahid bahonar university of kernlan, iran abstract the single phase flow and thermal performance of. Mar 11, 20 this shows how to model water in a double pipe heat exchanger. 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. The temperature dynamics were modeled by dividing the heat exchanger into a given number of control volumes.
1261 114 1596 741 440 625 745 784 704 780 470 1618 1100 400 942 549 1647 1325 1258 1177 981 494 568 551 24 1078 1675 207 1181 218 736 374 1220 1122