Double pipe exchangers can be paired in series or in parallel to increase the heat transfer rate through a system without complication. Optimal design of double pipe heat exchanger structures. 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. 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. Convective heat transfer from the outer tube wall to the outside fluid. Overall heat transfer coefficient for doublepipe heat. All about double pipe heat exchangers what you need to know. The ideal choice for compact design and unequaled thermal performance. Double pipe heat exchanger design free download and. 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. A double pipe heat exchanger consists of one pipe inside another. The overall heat transfer characteristics of a double pipe. 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.
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. In this configuration, no mixing of the hot and cold fluids needs to take place. Double pipe heat exchanger posted in chemical process simulation. The simplest type of heat exchanger consists of two concentric pipes of different diameters, as shown in fig. Design and demonstration of a heat exchanger for a compact. Smaller diameters of the outer tube in double pipe heat exchangers are. Hi, i need to simulate a double pipe hx with hysys. Design and rating of shell and tube heat exchangers page 4 of 30 mnl 032a issued 29 august 08, prepared by j. Jc equipments pvt ltd used top rated softwares to design and best quality design engineers to design your double pipe heat exchanger.
Double pipe heat exchanger design free to try webbusterz engineering software windows 98me2000xpvista7 version 2. Yes, we provide the recommended values for tema design fouling resistances. In the present study, heat transfer from hot water to cold water by double pipe heat exchanger consists concentric tube is experimentally investigated. It can be operated as a parallel flow or as a counterflow heat exchanger. A device whose purpose is the transfer of thermal energy between two fluids.
Double pipe heat exchanger calculation does the thermal and hydraulic design of double pipe heat exchangers and estimate number of hairpin required. To study and evaluate the effects of flow conditions and flow configurations on the rate of heat transfer through thin walled tubes. A composite system of alkaline fuel cells and peripheral. 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. Equations for calculating the overall heat transfer coefficient for a double pipe heat exchanger with no phase changes. Akpinar inserts mounting helical wires into the inner pipe of a double pipe. To determine the overall heat transfer coefficient for the double pipe heat exchanger for countercurrent flow and parallel or cocurrent flow. 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.
Determination of the heat transfer surface area needed for a double pipe heat exchanger design can be done using the basic heat exchanger equation. Fired heaters the selection of a heat exchanger depends on many factors including capital and. Double pipe heat exchanger design with counterflow or parallel flow. The two most common heat exchanger design problems are those of rating and sizing. I tried with the shell and tube hx but this is not what i have to simulate. 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. This project work is based on design and thermal analysis of double pipe heat exchanger. Checalc chemical engineering calculations to assist process, plant operation and maintenance engineers. Optimum design of double pipe heat exchanger sciencedirect. Double pipe heat exchanger ce 328 spring 2003 objective. Pressure across the orifice is recoded through utube manometer. Products double pipe heat exchangers heat transfer. Doublepipe heat exchanger doublepipe heat exchanger loading.
Q is the rate of heat transfer between the two fluids in the heat exchanger in btuhr. A double pipe heat exchanger design and optimization for cooling. Double pipe heat exchangers are normally designed in a hairpin shape and are fabricated in accordance with asme code. Double pipe heat exchanger two sets of concentric pipes, two connecting tees, and a return head and a return bend. This paper investigates the design optimization of double pipe heat exchanger using mathematical programming. Usually, we need to figure out the required heat transfer area for a given job, given a. Design a double pipe heat exchanger with bare inner multitubes that can be used to cool engine oil with cold sea water. Is there a database or recommendations for the fouling factors. 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. Pdf the double pipe heat exchanger is one heat exchanger pipe inside another larger pipe for either counter flow or parallel flow pattern. The computeraided design cad files and all associated content posted to this website are created, uploaded, managed and owned by. Heat exchanger is one of the important devices in cooling and heating process in factories, buildings, transports and others. Double pipe heat exchanger is one of the most simple and applicable heat exchangers, as shown in fig. Pdf design of double pipe heat exchanger kirti zare, dipika kanchan, and nupur patel academia.
Doublepipe heat exchanger 3d cad model library grabcad. 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 heat exchangers are usually designed in a hairpin shape with asme code and will typically be either counterflow or parallel flow. Double pipe heat exchanger chemical process simulation. Base your calculation on the outside area of the inside pipe. We certify that the project entitled design of small heat exchanger double pipe. 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. 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. I just need a simple model, that is to said a tube inside the other. Doublepipe exchangers is the generic term covering a range of jacketed u tube exchangers normally operating in countercurrent flow of two types. The design of shell and tube heat exchanger using kern method for water and steam. Retain extra sig figs since this is an intermediate calculation. Single inner pipe formed into a removable u or element, with either longitudinal fins or centralizing supports.
This article shows how to do design for double pipe heat exchanger and estimate length of double pipe required. 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. It is widely used in chemical process, food heating, oil cooling, gas industries, high temperature and pressure applications. Tube heat exchangers general heat exchanger design 1.
How to model a double pipe heat exchanger2 youtube. Theses fins are arranged in such a manner so that they can work as a baffle plate which helps in. 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. Show the initial fabrication of experimental setup of double pipe heat exchanger in fig. Is it possible to select a tema configuration in order to make a paralelism. 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. In this paper the optimal design of the exchanger has been formulated as a geometric programming with a single degree of difficulty. 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 design with counterflow or. 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. Typical standard sizes, layout and overall dimensions are shown. Optimal design of a double pipe heat exchanger based on. Calculate the heat transfer area of the double pipe heat exchanger in the lab.
Design, analysis and fabrication of shell and tube heat. Che 120b 1 heat exchangestheory the doublepipe heat. The heat exchange duty a llows calculation of the log mean. Klm technology group process design of double pipe. This paper investigates the design optimization of double pipe heat exchanger. Many published works use various inserts to improve the heat transfer performance. E1mnl032a design and rating of shell and tube heat. Double pipe heat exchanger manufacturers india heat. One fluid flows in the inner pipe, while a second fluid flows in the outer pipe annuals. One of the most difficult aspects of heat exchange design is the reduction in heat transfer. For calibration of orifice meter standard made rotameter is used in the systems. The high stresses produced by differential thermal expansion between outer and inner pipes are more easily handled.
This excel spreadsheet helps you design a double pipe heat exchanger also known as a concentric tube heat exchanger. They have a particular advantage when close temperature approaches are needed or in high pressure applications. Pdf design of double pipe heat exchanger kirti zare. Fin construction details section of a double pipe heat exchanger. The heat exchanger is found in large construction to support cooling process such as fossil fuel power plant.
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. Jessica holmes calvin lam bradford marx andrew nelson. Longer contact time and higher heat exchange surface area allows greater heat tran. The hot water used in the shellandtube heat exchanger is produced by means of a doublepipe heat exchanger. Heat exchangers are typically classified according to flow arrangement and type of construction. Although doublepipe heat exchangers are the simplest to design, the better choice in the following cases would be the helicalcoil heat exchanger hche. 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.
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. 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. The most widely used double pipe heat exchanger is the hair pin. Shell and tube heat exchanger design software for thermal. Design of this heat exchanger was dependent on heat transfer conditions and related equations. The double pipe heat exchanger is one heat exchanger pipe inside another larger pipe for either counter flow or parallel flow pattern. Calculate the rotameter setting for the desired waterside flow rate. Double pipe heat exchanger, double pipe heat exchanger. It is called a doublepipe exchanger because one fluid flows inside a pipe and. 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. Which is more efficient, shell and tube heat exchangers or. The principal parts are two sets of concentric pipes, two connecting tees, and a return head and a return bend as shown in fig. Ntu relationships are given for a simple double pipe heat. Email this page download pdf download pdf printable page.
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