Also fouling consideration and the fluids used in shell and tube have. Typically, the ends of each tube are connected toplenums sometimes called water boxes through holes in tubesheets. Heat transfer theory tells us that the log mean temperature difference is the average temperature difference to use in heat exchanger design equation calculations. Nov 01, 2016 solving a design problem for shell and tube heat exchanger in htri software using tubular exchanger manufacturing association tema standards you can make full design of heat exchangers for. To make the most of exchanger design software, one needs to understand sthe classi. Design and development of shell and tube heat exchanger. The locations of the nozzles and the orientation of the.
Pdf effectively design shellandtube heat exchangers. These are calculated using a pressure vessel design code such as the boiler and pressure vessel code from asme american society of mechanical engineers and the british master pressure vessel standard, bs 5500. As you can see, in a 12 heat exchanger, the tube side fluid flows the entire length of the shell. The oil provides an average convection coefficient ho 400 wm2k on the outside of the tubes. Theyare used in process industries, in conventional and nuclear power stations, steam generators, etc. The product medium flows inside this tube, and the service medium around it. Due to the high heat transfer efficiency of the plates, plate type heat exchangers are usually very small when compared to a tube and shell type heat exchanger with the same heat transfer capacity.
The basic layout for a countercurrent shell and tube heat exchanger together with the associated heat curve for a condensing process generated from chemcad are shown. My fire water pump calculation post series will be postponed due to these topics. Shell and tube heat exchanger design there can be many variations on the shell and tube design. Unlike other tools, ensures that the calculations are performed step by step to help in understanding the design calculations. Yes, we provide the recommended values for tema design fouling resistances. Heat exchanger design free download as powerpoint presentation. Now we will try to go in details about this shell and tube heat exchangers. Moreover the constructional details and design methods of shell and tube type heat exchangers has been given from which of that the kern. The basic heat exchanger design equation can be used for a variety of types of heat exchangers, like double pipe heat exchangers or shell and tube heat exchangers.
The tubes may be straight or bent in the shape of a u, called utubes. Plate heat exchanger, how it works working principle hvac industrial engineering phx heat transfer duration. The design methods of the parts that could be included in a shell and tube heat exchanger will be described in the following chapters of this document. Unlike other tools, ensures that the calculations are performed step b. Specifying shell and tube heat exchangers understand what heat exchanger design specialists need to know and remember, you know your process best asif raza shell and tube heat exchangers are one of the most important and commonly used process equipment items in the chemical process industries cpi. Design, fabrication and testing of shell and tube heat. Pdf design of shell and tube heat exchanger single. 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. The analysis is extended using the above kern method with different fluid. We design as well as manufacture shell and tube heat exchanger for a chiller, heat pumps, refrigeration and airconditioning, oil cooler, water cooler and for much more machinery types of equipment.
Setting shell side and tube side pressure drop design limits. E1mnl032a design and rating of shell and tube heat. Viscoline monotube modules are normally connected in series and. There are three different classifications of shell and tube heat exchangers such as parallel flow, cross flow and countercurrent flow. Also the main components of shell and tube type heat exchanger are shown in drawing and its detail discussion is given. Components of the shell and tube heat exchanger 1 heat exchanger shell 2 connection chamber 3 guide chamber 4 internal tubes 5 tubesheets 6 baffles 7 apparatus seal however, an effective heat exchange can only take place if the temperature difference is sufficient.
Inside the shell, baffles are typically installed which help in holding the tubes and directing the shell fluid flow to some extent. Therein, popular analytical techniques such as log mean temperature difference lmtd and effectivenessnumber of. As you can see, in a 12 heat exchanger, the tube side fluid flows the entire length of the shell, turns around and flows all the way back. The optimum thermal design of a shell and tube heat exchanger involves the consideration of many interacting design parameters which can be summarized as. A shell and tube heat exchanger must be designed to heat 2.
The design of shell and tube heat exchanger using kern method for water and steam combination is validated by wellknown dittusboelter equation of turbulent flow inside tube. Tube heat exchangers general heat exchanger design 1. Introduction due to their resistant manufacturing features and design flexibility, shell and tube heat. Types of heat exchangers shell and tube, plate type.
The mechanical design of a shell and tube heat exchanger provides information on items such as shell thickness, flange thickness, etc. All trademarks, registered trademarks, product names and company names or logos mentioned. Poor choice of tube material could result in a leak through a tube between the shell and tube sides causing fluid crosscontamination and possibly loss of pressure. Specifying shellandtube heat exchangers understand what heat exchanger design specialists need to know and remember, you know your process best asif raza shellandtube heat exchangers are one of the most important and commonly used process equipment items in the chemical process industries cpi. Utube design type su, wu, htwu, dsu, dwu, dtc xylem. Troubleshooting shell and tube heat exchangers use these techniques and guidelines to ensure more reliable heat transfer d. Gulley, gulley computer associates, tulsa, oklahoma. Design, analysis and fabrication of shell and tube heat exchanger. Optimization of shell and tube heat exchanger for tube. Is there a database or recommendations for the fouling factors. A characteristic of heat exchanger design is the procedure of specifying a design heat transfer area and pressure drops and checking whether the assumed design satisfies all.
Heat exchanger shell and tube heat exchanger manufacturer. Use hextran to design a shell and tube heat exchanger for the kerosenecrudeoil service of example 51, and compare the resulting unit with the one designed previously by hand. The design is the main subject of refrigeration and air conditioning shell and tube heat exchanger. Thermal design of a shell and tube heat exchanger typically includes the determination of heat transfer area, number of tubes, tube length and diameter, tube layout, number of shell and tube passes, type of heat exchanger fixed tube sheet, removable tube bundle etc, tube pitch, number of baffles, its type and size, shell. All trademarks, registered trademarks, product names and company names or logos mentioned herein are the property of their respective owners. Large volumes of hot water are produced by an amazingly small unit. Wu heat exchanger instantaneous watertowater heat transfer with pumped boiler water circulation. Thermal design of a shell and tube heat exchanger typically includes the determination of heat transfer area, number of tubes, tube length and diameter, tube. Design, analysis and fabrication of shell and tube heat. Less is the baffle spacing, more is the shell side passes, higher the heat transfer but at the cost of the pressure drop. Heat exchangers fundamentals and design analysis prof.
May 28, 2017 this figure shows you general stepbystep method of design of shell and tube heat exchanger design of shell and tube heat exchanger. Pdhonline course m371 2 pdh shell and tube heat exchangers. Shell and tube heat exchanger design in solidworks youtube. Based on that result we can optimize the design of the shell and tube type heat exchanger.
The most common problems in heat exchanger design are rating and sizing. The simple design of a shell and tube heat exchanger makes it an ideal cooling solution for a. It is easy to drain and clean and features leakage detection. The greater the temperature difference, the smaller will be the. However, not every element described herein will be involved in the design of every shell and tube heat exchanger. Bahirdar university institute of thechnology smie thermal page iii design of shell and tube heat exchanger nomenclature. I usually calculate for both shell side and tube side just to ensure that the duty is similar. Higher the thermal conductivity of the tube metallurgy higher the heat transfer rate will be achieved. The main purpose of heat exchanger is the transfer of heat from one fluid to another. Shell and tube heat exchanger design is a product developed by webbusterz engineering software. Shell and tube heat exchanger design free download for. Most shellandtube heat exchangers have multiple passes to enhance the heat transfer.
It is a fully welded construction with a bellow on shell tube to absorb thermal expansion. Here is an example of a 12 1 shell pass and 2 tube passes heat exchanger. Shellside flow area varies across the bundle diameter with the different number of tube clearances in each longitudinal row of tubes. Heat exchanger theory and the heat exchanger design equation. Most shell and tube heat exchangers have multiple passes to enhance the heat transfer. 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. Fluid engine oil sea water inlet temperature, c 65 20 outlet temperature, c 55 25 heat. The ste module in hextran is configured in design mode by right clicking on the unit and selecting change configuration from the popup menu. The rating problem is evaluating the thermohydraulic performance of a. The performances of shell and tube heat exchanger mainly depend on baffle geometry and tube geometry. Ravagnani and caballero 2007a model formulation the model for the design of the optimum she ll and tube equipment considers the objective function as the minimum cost including exchange area cost and pumping cost, rigorously. This figure shows you general stepbystep method of design of shell and tube heat exchanger design of shell and tube heat exchanger. Design of shell and tube heat exchanger layout design. Shell and tube heat exchanger design calculations to find the required heat transfer area can be done if the needed rate of heat transfer from one fluid is known along with the desired inlet and outlet temperatures of the other fluid and an estimate for the overall heat transfer coefficient.
Pdf on feb 8, 2020, phelelani eshmael mamba and others published heat exchanger design report design of a shell and tube heat exchanger, 1 shell 1 tube pass with fixed tube head and counter. Heat exchangers are constructed in order to transfer heat between two mediums. This report will include the design, manufacturing methods, cost, and final attributes of the shell and. Shell and tube heat exchanger design software for thermal. Effectively design shell and tube heat exchangers rajiv mukherjee, engineers india ltd. However, new improvements in gasket design and overall heat exchanger design have allowed some large scale applications of the plate type heat exchanger. Shell and tube heat exchangers basic calculations pdh online. Durgesh bhatt, priyanka m javhar conducted a shell and tube heat exchanger performance analysis it is observed that by changing the value of one variable the by keeping the rest variable as constant we can obtain the different results. As shown in figure 47, the shell and tube heat exchanger consists of the shell, which is a large vessel with one or more inlet and one or more outlet nozzles. As older facilities are upgraded or newly designed facilities are built, large plate type heat exchangers are replacing tube and shell heat exchangers and becoming more common. Guidelines for the safe design and operation of shell and. The exchangers exhibit more than 65% of the market share with a variety of design experiences of about 100 years. Therein, popular analytical techniques such as log. Pdf design of shell and tube heat exchanger single phase.
Shell and tube exchangers an overview sciencedirect topics. A shell and tube heat exchanger is an indirect contact heat exchanger in which the hot and cold fluid streams do not come in direct contact but the heat transfer occurs through a dividing wall. It is fully drainable on the product side, with no dead spots and has vent and drain possibilities on the utility side. The optimum thermal design of a shell and tube heat exchanger involves the consideration of many interacting design parameters which can be summarised as. Design and fabrication of shell and tube heat exchanger.
The pharmaline shell and tube heat exchanger is designed to operate at pressures up to 10 bar and operating temperatures of 150c. Solving a design problem for shell and tube heat exchanger in htri software using tubular exchanger manufacturing association tema standards you can make full design of heat exchangers for. Among all type of heat exchanger, shell and tube heat exchanger most commonly used. Obtain the shell side heat transfer coefficient where jh is obtained from the chart bellow. Process fluid assignments to shell side or tube side. Design and development of shell and tube heat exchanger for harar brewery company. The chosen heat exchanger flow pattern is also needed in order to calculate the log mean temperature. The objective of this was project was to design and optimize a shell and tube heat exchanger. This is due to the larger area the plates provide over tubes. Because this is so many, i think i will divide the topic into three topics.
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