Nnnshell and tube heat exchanger design problem filetype pdf

Effectively design shellandtube heat exchangers to make the most of exchanger design software, one needs to understand sthe classification, exchanger components, tube layout, baffling, pressure drop, and mean temperature difference. Problem on counter flow heat exchanger l heat exchanger l. Based on our experience at bessy i, special emphasis in the design of the. Tube in tube heat exchanger type he tube in tube heat exchanger type he is used primarily for heat transfer between the liquid and suction lines of the refrigeration plant. Effectively design shellandtube heat exchangers rajiv mukherjee, engineers india ltd.

When we size heat exchanger, should we take safety factor by using sizing flow rate normal flow rate x 1. This means that the plate heat exchanger can remain in service far longer between cleaning intervals. Effectively design shellandtube heat exchangers pdf. Solving a traditional shell and tube heat exchanger problem. The design of a heat exchanger is a complex task and requires attention to many parameters. The shell andtube heat exchanger design problem includes several interdependent qualitative and quantitative elements. The main objective of this project is the design and simulation of shell and tube heat exchanger with helical baffle using ans ys tools to reduce shell side pressure drop and to improve heat. How shell and tube heat exchangers work engineering. Correcting flaws in construction and piping that may have a detrimental effect on heat transfer. The purpose is to utilise the cooling effect, utilise which without a heat exchanger is otherwise lost to. All trademarks, registered trademarks, product names and company names or logos mentioned. Shell and tube heat exchanger design free download for. Heat transfer pressure drop for different in stocks used in.

To make the most of exchanger design software, one needs to understand sthe classi. The optimum thermal design of a shell and tube heat exchanger involves the consideration of many interacting design parameters which can be summarised as follows. Heat exchanger over design % posted in refining, hydrocarbons, oil, and gas. The design might not be practical if it results in a very low overall. Cfd analysis of shell and tube heat exchanger for heat. Tubular heat exchangers typically have a service interval of 6,000.

Design a double pipe heat exchanger with bare inner multitubes that can be used to cool engine oil with cold sea water. However, new improvements in gasket design and overall heat exchanger design have allowed some large scale applications of the plate type heat exchanger. If the heat transfer coefficients at the tube side and the shell side are known, the overall heat transfer coefficient u can be. Mess huts these are for the purposes of preparing, heating and consuming. Pdf advanced construction technology 4th edition by roy. Setting shell side and tube side pressure drop design limits. This plan has been done using kerns method in order to gain various dimensions such as shell, tubes, baffles etc. A plan for increasing heat exchanger performance for shell and tube exchangers should consider the following steps. Shell and tube heat exchanger partial differential equations in the analysis of a heat exchanger, or any heat transfer problem, one must begin with an energy balance. Others, depending on design requirements clearly, heat exchanger design is a multivariable problem which does not usually lend itself to a simple solution. 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.

The most common problems in heat exchanger design are rating and sizing. Such heat exchangers are the workhorses of the process industries, where they provide flexibility, robustness and ease of cleaning. The heating is to be accomplished by passing hot engine oil, which is available at 160oc, through the shell side of the exchanger. E1mnl032a design and rating of shell and tube heat. Chalmers university of technology abstract an unbaf. Shell and tube heat exchanger design is a product developed by webbusterz engineering software. Since heat duty is comparatively very large, the heat exchanger is designed as a two heat exchanger unit arranged in a series. On the tube side, the heat transfer coefficient and pressure drop are determined from empirical correlations. Shell and tube heat exchanger design software for thermal. Ppt on failure analysis of shell and tube heat exchangers. A computer model using catia v5 has been built up by using the derived dimensions of heat exchanger. It also incorporates more recent issues, especially aspects of the building. The two most common heat exchanger design problems are those of rating and sizing.

I went through my own heat exchanger design efforts when building a homemade air conditioner some time ago. General heating and cooling duties, heat recovery, pasteurization and uht treatment of a broad range of food products. Process fluid assignments to shell side or tube side. Equation 4 is valid for a 11 exchanger with 1 shell pass and 1 tube pass in parallel or counterflow.

Fluid engine oil sea water inlet temperature, c 65 20 outlet temperature, c 55 25 heat. 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. In fact, fouling has been recognised for a long time, and research on heat exchanger fouling was conducted as early as 1910 and the first practical application of this research was. 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. Heat transfer mechanism shell and tube heat exchangers are typically used for high pressure applications with pressures greater than 30 bar and temperatures greater than b. Inside the shell, baffles are typically installed which help in holding the tubes and directing the shell fluid flow to some extent. The locations of the nozzles and the orientation of the. Accelerometer and microphone positions in the heat exchanger. 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 exchanger overdesign% refining, hydrocarbons, oil.

The rating problem is concerned with the determination of the heat transfer rate, fluid outlet temperature, inlet temperature, heat transfer area and the sizing problem involves determination of the dimension of the heat exchanger. Also check for tube od wear where the pass through baffles. Inspection procedure for shell and tube heat exchangers. It may also be used for the preliminary design of shell and heat exchangers in actual industrial. Incorporating fouling modeling into shellandtube heat. Guidelines for the safe design and operation of shell and. Unlike other tools, ensures that the calculations are performed step by step to help in understanding the design calculations. Inspection procedure for shell and tube heat exchangers printed. Hi in shell and tube sizing software like htri, there is over design %,as i know it is udirtyuservice what does it mean. The shell and tube heat exchanger design software is developed for use in the teaching of thermal and hydraulic design of shell and tube heat exchangers usually at the senior undergraduate level of a mechanical or chemical engineering course.