Design of this heat exchanger was dependent on heat transfer conditions and related equations. Double pipe heat exchanger design free download and. How to model a double pipe heat exchanger2 youtube. The hot water used in the shellandtube heat exchanger is produced by means of a doublepipe heat exchanger. The solution of the problem yields the optimum values of inner pipe diameter, outer pipe diameter and utility flow rate to be used for a double pipe heat exchanger of a given length, when a specified flow rate of. The heat exchangers are usually designed in a hairpin shape with asme code and will typically be either counterflow or parallel flow. Design and rating of shell and tube heat exchangers page 4 of 30 mnl 032a issued 29 august 08, prepared by j. Double pipe heat exchanger with circular fins double pipe heat exchanger with circular fins the circular fins are mounted on the outer surface of inner pipe and concentric with inner pipe and outer pipe shows a circular fins with 9.
Design, analysis and fabrication of shell and tube heat. Jc equipments pvt ltd used top rated softwares to design and best quality design engineers to design your double pipe heat exchanger. Usually, we need to figure out the required heat transfer area for a given job, given a. In this paper the optimal design of the exchanger has been formulated as a geometric programming with a single degree of difficulty. This excel spreadsheet helps you design a double pipe heat exchanger also known as a concentric tube heat exchanger. In the present study, heat transfer from hot water to cold water by double pipe heat exchanger consists concentric tube is experimentally investigated. The ideal choice for compact design and unequaled thermal performance. Heat exchangers are typically classified according to flow arrangement and type of construction. Che 120b 1 heat exchangestheory the doublepipe heat. Double pipe heat exchangers often also referred to as double pipes are characterized by a construction form which imparts a u shaped appearance to the.
Double pipe heat exchanger ce 328 spring 2003 objective. The double pipe heat exchanger is a small, modular design that is most useful in applications where conventional shell and tube exchangers are too large or too expensive to use. Design and demonstration of a heat exchanger for a compact natural gas compressor major qualifying project report submitted to the faculty of worcester polytechnic institute in partial fulfillment of the requirements for the degree of bachelor of science of mechanical engineering submitted by. Fin construction details section of a double pipe heat exchanger. The principal parts are two sets of concentric pipes, two connecting tees, and a return head and a return bend as shown in fig. 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.
Overall heat transfer coefficient for doublepipe heat exchanger calibrate thermocouples pump water through inner pipe of doublepipe heat exchanger rate determined by rotameter flow steam through outer pipe of doublepipe heat exchanger measure rate by pail and scale. Double pipe heat exchanger design with counterflow or. We certify that the project entitled design of small heat exchanger double pipe. Email this page download pdf download pdf printable page. The simplest heat exchanger is one for which the hot and cold fluids move in the same or opposite directions in a concentric tube or doublepipe construction. The doublepipe heat exchanger is one of the simplest types of heat exchangers. 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. A double pipe heat exchanger consists of one pipe inside another. The double pipe heat exchanger is one heat exchanger pipe inside another larger pipe for either counter flow or parallel flow pattern. Retain extra sig figs since this is an intermediate calculation. Double pipe heat exchanger posted in chemical process simulation. Ntu relationships are given for a simple double pipe heat. This project work is based on design and thermal analysis of double pipe heat exchanger.
The computeraided design cad files and all associated content posted to this website are created, uploaded, managed and owned by. Which is more efficient, shell and tube heat exchangers or. Many published works use various inserts to improve the heat transfer performance. Hemmat of mechanical engineering, shahid bahonar university of kernlan, iran abstract the single phase flow and thermal performance of a double pipe heat exchanger are examined by experimental methods. In this configuration, no mixing of the hot and cold fluids needs to take place. A composite system of alkaline fuel cells and peripheral. Checalc chemical engineering calculations to assist process, plant operation and maintenance engineers. The design of shell and tube heat exchanger using kern method for water and steam. Doublepipe heat exchanger 3d cad model library grabcad. Optimal design of a double pipe heat exchanger based on. Double pipe heat exchanger design with counterflow or parallel flow. All about double pipe heat exchangers what you need to know. Shell and tube heat exchanger design software for thermal. 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.
One of the most difficult aspects of heat exchange design is the reduction in heat transfer. 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. 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. Double pipe heat exchanger is one of the most simple and applicable heat exchangers, as shown in fig. 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 normally designed in a hairpin shape and are fabricated in accordance with asme code. Is there a database or recommendations for the fouling factors. This paper investigates the design optimization of double pipe heat exchanger. Determination of the heat transfer surface area needed for a double pipe heat exchanger design can be done using the basic heat exchanger equation.
Calculate the heat transfer area of the double pipe heat exchanger in the lab. 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. Although doublepipe heat exchangers are the simplest to design, the better choice in the following cases would be the helicalcoil heat exchanger hche. The main advantage of the hche, like that for the spiral heat exchanger she, is its highly efficient use of space, especially when its limited and not enough straight pipe can be laid. Pressure across the orifice is recoded through utube manometer. It is widely used in chemical process, food heating, oil cooling, gas industries, high temperature and pressure applications.
The high stresses produced by differential thermal expansion between outer and inner pipes are more easily handled. The two most common heat exchanger design problems are those of rating and sizing. Pdf design of double pipe heat exchanger kirti zare. Theses fins are arranged in such a manner so that they can work as a baffle plate which helps in. Optimum design of double pipe heat exchanger sciencedirect. Classification according to design or type tubular platetype extended surface regenerative phe spiral plate coil printed circuit gasketed welded brazed doublepipe shellandtube spiral tube pipe coils crossflow to tubes parallel flow to tubes platefin tubefin ordinary separating wall heatpipe wall rotary fixedmatrix rotating hoods. 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. For calibration of orifice meter standard made rotameter is used in the systems. Convective heat transfer from the outer tube wall to the outside fluid.
They have a particular advantage when close temperature approaches are needed or in high pressure applications. 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. Typical standard sizes, layout and overall dimensions are shown. Doublepipe heat exchanger doublepipe heat exchanger loading. Pdf the double pipe heat exchanger is one heat exchanger pipe inside another larger pipe for either counter flow or parallel flow pattern. The overall heat transfer characteristics of a double pipe. The heat exchanger area is minimized and the thermofluid dynamic conditions are considered for the use of the right transport correlations, together with design specifications, such as, maximum pressure drops and minimum excess area. Double pipe heat exchanger chemical process simulation. Design and demonstration of a heat exchanger for a compact. 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 heat exchanger two sets of concentric pipes, two connecting tees, and a return head and a return bend. 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. The heat exchange duty a llows calculation of the log mean. Fired heaters the selection of a heat exchanger depends on many factors including capital and.
It can be operated as a parallel flow or as a counterflow heat exchanger. Show the initial fabrication of experimental setup of double pipe heat exchanger in fig. Akpinar inserts mounting helical wires into the inner pipe of a double pipe. Single inner pipe formed into a removable u or element, with either longitudinal fins or centralizing supports. I just need a simple model, that is to said a tube inside the other. Hi, i need to simulate a double pipe hx with hysys. E1mnl032a design and rating of shell and tube heat. Tube heat exchangers general heat exchanger design 1. 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. Yes, we provide the recommended values for tema design fouling resistances. Products double pipe heat exchangers heat transfer.
To determine the overall heat transfer coefficient for the double pipe heat exchanger for countercurrent flow and parallel or cocurrent flow. Overall heat transfer coefficient for doublepipe heat. Equations for calculating the overall heat transfer coefficient for a double pipe heat exchanger with no phase changes. Smaller diameters of the outer tube in double pipe heat exchangers are. Design a double pipe heat exchanger with bare inner multitubes that can be used to cool engine oil with cold sea water. Heat exchanger is one of the important devices in cooling and heating process in factories, buildings, transports and others. This article shows how to do design for double pipe heat exchanger and estimate length of double pipe required. The simplest type of heat exchanger consists of two concentric pipes of different diameters, as shown in fig. Double pipe heat exchanger calculation does the thermal and hydraulic design of double pipe heat exchangers and estimate number of hairpin required. 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. Double pipe heat exchanger design free to try webbusterz engineering software windows 98me2000xpvista7 version 2. Optimal design of double pipe heat exchanger structures. Longer contact time and higher heat exchange surface area allows greater heat tran.
Klm technology group process design of double pipe. Base your calculation on the outside area of the inside pipe. Double pipe exchangers can be paired in series or in parallel to increase the heat transfer rate through a system without complication. Double pipe heat exchanger manufacturers india heat. It is called a doublepipe exchanger because one fluid flows inside a pipe and. To study and evaluate the effects of flow conditions and flow configurations on the rate of heat transfer through thin walled tubes. Pdf design of double pipe heat exchanger kirti zare, dipika kanchan, and nupur patel academia. The most widely used double pipe heat exchanger is the hair pin.
A double pipe heat exchanger design and optimization for cooling. Q is the rate of heat transfer between the two fluids in the heat exchanger in btuhr. A device whose purpose is the transfer of thermal energy between two fluids. Unlike other tools, ensures that the calculations are performed step by step to help in understanding the design calculations. 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.
Jessica holmes calvin lam bradford marx andrew nelson. 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. I tried with the shell and tube hx but this is not what i have to simulate. Calculate the rotameter setting for the desired waterside flow rate. Double pipe heat exchanger, double pipe heat exchanger.