A double pipe heat exchanger also sometimes referred to as a pipeinpipe exchanger is a type of heat exchanger comprising a tube in tube structure. Combining each of these resistances in series gives. As the name suggests, it consists of two pipes, one within the other. Heat exchangers jordan university of science and technology. Heat exchanger formulas software free download heat. Double pipe heat exchanger design free to try webbusterz engineering software windows 98me2000xpvista7 version 2. Low cost engineering calculations software available for convection heat transfer coefficients, pipe flowfriction factor calculations, partially full pipe flow calculations, watershed time of concentration, rational method, orifice and venturi meter flow rate calculations, open channel flow measurement, activated sludge wastewater. Different types of heat exchangers are shown in figure 42. Download the excel spreadsheet templates in this article to make preliminary heat exchanger design calculations.
A double pipe heat exchanger like shell and tube heat exchangers. For a double pipe heat exchanger thermal design calculations spreadsheet, click here to visit our spreadsheet store. The most widely used double pipe heat exchanger is the hair pin. 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. Checalc chemical engineering calculations to assist process, plant operation and maintenance engineers.
The convection heat transfer coefficient is reported to be h i 700wm 2 c on the inner surface of the tube and h o 1400 wm 2 c on. Low cost engineering calculations software available for convection heat transfer coefficients, pipe flowfriction factor calculations, partially full pipe flow calculations, watershed time of concentration, rational method, orifice and venturi meter flow rate calculations, open channel flow measurement, activated sludge. The high stresses produced by differential thermal expansion between. Aug 10, 2011 for a double pipe heat exchanger thermal design calculations spreadsheet, click here to visit our spreadsheet store. Introduction research in heat transfer and thermophysical fluid properties in the past three decades have helped develop heat exchangers designs, by relying on. 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. In process calculations, the main objectives of heat exchanger calculations are to determine the heat duty amount of energy to be transferred, temperature changes within the exchanger, and pressure drops. Although the necessary equations for heat transfer and the pressure drop in a double pipe heat. The two most common heat exchanger design problems are those of rating and sizing. Heat exchangers are used in both cooling and heating processes. Heat exchanger software free download heat exchanger. Make a more detailed estimate of the overall heat transfer coefficient, u, based on the preliminary heat exchanger configuration. You may need to pay at some moment to continue using product or to use all functionalities. Heat exchangers are used to transfer heat between two sources.
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. This thesis open access is brought to you for free and open access by the. Base your calculation on the outside area of the inside pipe. 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. 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 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. They are widely used in space heating, refrigeration, air conditioning, power stations, chemical plants, petrochemical plants, petroleum refineries, natural. Double pipe heat exchanger calculation does the thermal and hydraulic design of double pipe heat exchangers and estimate number of hairpin required. The high stresses produced by differential thermal expansion between outer and inner pipes are more easily handled. Design a double pipe heat exchanger with bare inner multitubes that can be used to cool engine oil with cold sea water. Heat exchangers are used in industrial processes to recover heat between two process fluids. The heat exchange duty a llows calculation of the log mean. Read on for information about the use of a heat exchanger design thermal design calculations spreadsheet for a double pipe heat exchanger. Each of those parameters will be discussed briefly in the next three sections. Pdf the double pipe heat exchanger is one heat exchanger pipe inside another larger pipe for either counter flow or parallel flow pattern. Heat exchangers 73 individual thermal resistances of the system.
Heat exchangers are typically classified according to flow arrangement and type of construction. If it is too high, revise the heat exchanger configuration until the pressure drop is acceptable. This excel spreadsheet helps you design a double pipe heat exchanger also known as a concentric tube heat exchanger. 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. Equations for calculating the overall heat transfer coefficient for a double pipe heat exchanger with no phase changes. Dimensions of the heat exchanger are in the equipment schedule. This engineering calculator will determine a number of variables for the most common arrangements or flow paths within heat exchangers. Fin construction details section of a double pipe heat exchanger. In the parallel flow arrangement the hot and cold fluids enter at the same end, flow in the same direction, and leave. Phex is an easy to use tool which demonstrates the thermal calculations of gasketed plate heat exchangers phex is an easy to use tool which demonstrates the thermal calculations of gasketed plate heat exchangers, the plate dimensions and materials can be entered, this includes the size of plate heat exchanger and chevron angle. 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.
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. Look up and fit the latent heat of vaporization of steam. Unlike other tools, ensures that the calculations are performed step by step to help in understanding the design calculations. Shell and tube heat exchanger design software for thermal. A device whose purpose is the transfer of thermal energy between two fluids. 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. Here, we will cite only those that are immediately useful for design in shell and tube heat exchangers with sensible heat transfer on the shellside. Double pipe heat exchanger two sets of concentric pipes, two connecting tees, and a return head and a return bend.
Chapter 5 heat exchangers faculty of engineering and. Exchanger type would you like to change how the exchanger is specified. The fluid flows in the inner pipe is the tube side and in exchange another fluid flows in the outer pipe annulus. Creation of excel sheet and plugging in of all available data. The overall heat transfer coefficient of the exchanger is. The effectiveness of doublepipe heat exchangers can be increased by using. Double pipe heat exchanger design step by step software. A double pipe heat exchanger consists of one pipe inside another. Heat exchanger design and heat transfer coefficients. Heat exchanger software free download heat exchanger top 4 download offers free software downloads for windows, mac, ios and android computers and mobile devices.
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. Most processes require the heating or cooling of streams to produce a desired temperature before the stream can be fed to operations. Optimal design of double pipe heat exchanger structures. The double pipe heat exchanger is, in its simplest form, one pipe held concentrically inside of a larger pipe thus the name double pipe. Heat exchanger the purpose of a heat exchanger is just thatto exchange heat. 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. Would you like to change how the exchanger is specified. We using latest raw material in the making development of double pipe heat exchangers. They will also calculate the number of tubes needed for a shell and tube heat exchanger and to calculate the pipe length needed for a double pipe heat exchanger. Overall heat transfer coefficient for double pipe heat. Double pipe heat exchanger design viscosity free 30day trial. This type of heat exchangers are mostly used in the fields of thermal power station, petroleum and heat industry. Products double pipe heat exchangers heat transfer.
Heat exchangers are devices used to transfer heat between two or more fluid streams. Double pipe heat exchanger design free download as pdf file. In process calculations, the main objectives of heat exchanger calculations are to determine the heat duty amount of energy to be transferred, temperature changes. Heat exchanger design and heat transfer coefficients archives. Guidelines to do design sizing for double pipe heat exchanger and.
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. Calculate the required heat transfer area based on values needed. Heat exchanger demonstration lab double pipe he shell. They have a particular advantage when close temperature approaches are needed or in high pressure applications. Pdhonline course m371 2 pdh shell and tube heat exchangers. The double pipe heat exchanger is probably one of the simplest. The double pipe heat exchanger is one heat exchanger pipe inside another larger pipe for either counter flow or parallel flow pattern. Heat transferheat exchangers blogs engineering excel templates. Fluid engine oil sea water inlet temperature, c 65 20 outlet temperature, c 55 25 heat load, kw 117. A heat exchanger is a system used to transfer heat between two or more fluids. The inner pipe acts as the conductive barrier, where one fluid flows through this inner pipe and another flows around it through the outer pipe, forming an annulus shape.
Heat exchanger calculations and design with excel spreadsheet. Horizontal double pipe heat exchanger uses various inserts inside tube so as to enhance heat transfer. This paper investigates the design optimization of double pipe heat exchanger using mathematical programming. The fluids may be separated by a solid wall to prevent mixing or they may be in direct contact. A doublepipe heat exchanger is constructed of a copper k 380 wm c inner tube of internal diameter d i 1. 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. Cfd, heat transfer, double pipe heat exchanger, energy recovery. Mar 11, 20 equations for calculating the overall heat transfer coefficient for a double pipe heat exchanger with no phase changes. How to model a double pipe heat exchanger2 youtube. We provide high and international quality standards double pipe heating system.
Preliminary analytical design double pipe heat exchanger reference calculation examples 1, 2, 11, 12 and 16 are used from the butterworth text. 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. May 05, 2020 fin construction details section of a double pipe heat exchanger. It can be operated as a parallel flow or as a counterflow heat exchanger. Double pipe heat exchager design code heat transfer. In any heat exchanger there must be a fluid that requires a change in energy heating or cooling and a fluid.
Thermal performance of a doublepipe heat exchanger with a koch. In its classical sense, the term double pipe refers to a heat exchanger consisting of a pipe within a pipe, usually of a straightleg. The heat exchanger is found in large construction to support cooling process such as fossil fuel power plant. Plate heat exchanger, how it works working principle hvac industrial engineering phx heat transfer duration. Calculate the heat transfer area i 6 of the double pipe heat exchanger in the lab. Double pipe exchangers can be paired in series or in parallel to increase the heat transfer rate through a system without complication. The basic design equation and overall heat transfer coefficient the basic heat exchanger equations applicable to shell and tube exchangers were developed in chapter 1. Heat exchanger is one of the important devices in cooling and heating process in factories, buildings, transports and others. All about double pipe heat exchangers what you need to know.
A procedures manual was created for the doublepipe heat exchanger. Double pipe heat exchanger design free download and. Shell and tube heat exchangers basic calculations pdh online. For a heat exchanger thermal design calculations spreadsheet, 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. Convective heat transfer from the outer tube wall to the outside fluid. Double pipe heat exchanger design is licensed as demo which means that software product is provided as a free download to users but it may be limited in functionality or be timelimited. Double pipe heat exchanger, double pipe heat exchanger. This example studies the cooling of hot oil c by a cool oil 60c entering in countercurrent. Download free excel spreadsheets for engineering calculations. In process calculations, the main objectives of heat exchanger calculations are to. 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 double pipe construction.
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