Instrumentation for the Advancement of Shell and Tube Heat Exchanger Design or for Implementing an Upgrade via a Retrofit Process

2017 ◽  
Author(s):  
Timothy J. Harpster ◽  
Joseph W. C. Harpster
Keyword(s):  
Heat Exchanger ◽  
Large Scale ◽  
Evaluation Process ◽  
Flow Measurements ◽  
Design Assessment ◽  
Tube Heat Exchanger ◽  
Heat Exchanger Design ◽  
Dimensional Measurements ◽  
Shell And Tube ◽  
Side Flow

This paper presents the instruments developed for shell and tube heat exchangers and their measurements made in operating large scale HX units. These instruments provide in-situ, long-term direct measurement of temperatures and fluid flow rates that are important for evaluation of the desirable and undesirable effects of a HX design. Unique results of this instrumentation are the 3-dimensional measurements of temperature at the inlet, outlet, and along the length of heat exchanger tubes, total tube side flow, and individual tube flow measurements. The temperature measurements are interpolated in a 3-D computational space for design assessment and engineering evaluation. These results have been used to design upgrades for underperforming steam surface condensers. Data from these instruments, the evaluation process, and design effort could lead to development of a new class of better performing heat exchanger designs.

Shell and tube heat exchanger design using mixed‐integer linear programming

AIChE Journal ◽  
2016 ◽  
Vol 63 (6) ◽  
pp. 1907-1922 ◽  
Author(s):  
Caroline de O. Gonçalves ◽  
André L. H. Costa ◽  
Miguel J. Bagajewicz
Keyword(s):  
Linear Programming ◽  
Heat Exchanger ◽  
Integer Linear Programming ◽  
Mixed Integer Linear Programming ◽  
Mixed Integer ◽  
Tube Heat Exchanger ◽  
Heat Exchanger Design ◽  
Shell And Tube

CFD Modeling and Analysis of a Shell-and-Tube Heat Exchanger

2008 ◽  
Author(s):  
Ender Ozden ◽  
I˙lker Tarı
Keyword(s):  
Heat Exchanger ◽  
Turbulence Modeling ◽  
Turbulence Models ◽  
Temperature Fields ◽  
Cfd Modeling ◽  
Shell Side ◽  
Cfd Simulations ◽  
Tube Heat Exchanger ◽  
Shell And Tube ◽  
Side Flow

A shell-and-tube heat exchanger is modeled and numerically analyzed using a commercial finite volume CFD package. The heat exchanger is small, has a single shell and a single tube pass, and its shell side is baffled. The baffles are 25% or 36% cut single-segmental baffles. Tube layout is the staggered layout with a triangular pitch. There is no leakage from baffle orifices and no gap between the baffles and the shell. It is observed that the shell side flow and the temperature distributions are very sensitive to modeling choices such as mesh, order of discretization and turbulence modeling. Various turbulence models are tried for the first and second order discretizations using two different mesh densities. CFD predictions of shell side pressure drop and overall heat transfer coefficient are obtained and compared with Kern and Bell-Delaware method results. After selecting the best modeling approach, the sensitivity of the results to flow rates and the baffle spacing is investigated. It is observed that the flow and temperature fields obtained from CFD simulations can provide valuable information about the parts of the heat exchanger design that need improvement. Correlation based approaches may indicate the existence of the weakness but CFD simulations can also pin point the source and the location of it. Using CFD together with experiments may speed up the design process and may improve the final design.

A Numerical Algorithm and a Graphical Method to Size a Heat Exchanger

2011 ◽  
Author(s):  
Torsten Berning
Keyword(s):  
Heat Exchanger ◽  
Numerical Algorithm ◽  
Heat Exchangers ◽  
Graphical Method ◽  
Application Software ◽  
Microsoft Excel ◽  
Tube Heat Exchanger ◽  
Overall Heat Transfer Coefficient ◽  
Heat Exchanger Design ◽  
Shell And Tube

This paper describes the development of a numerical algorithm and a graphical method that can be employed in order to determine the overall heat transfer coefficient inside heat exchangers. The method is based on an energy balance and utilizes the spreadsheet application software Microsoft Excel™. The application is demonstrated in an example for designing a single pass shell and tube heat exchanger that was developed in the Department of Materials Technology of the Norwegian University of Science and Technology (NTNU) where water vapor is superheated by a secondary oil cycle. This approach can be used to reduce the number of hardware iterations in heat exchanger design.

SIMULATION OF ORGANIC RANKINE CYCLE THROUGH FLUEGAS TO LARGE SCALE ELECTRICITY GENERATION PURPOSE

2015 ◽  
Vol 77 (27) ◽  
Author(s):  
Omid Rowshanaie ◽  
Saari Mustapha ◽  
Kamarul Arifin Ahmad ◽  
Hooman Rowshanaie
Keyword(s):  
Heat Exchanger ◽  
Large Scale ◽  
Organic Rankine Cycle ◽  
Rankine Cycle ◽  
Steady State Condition ◽  
Working Fluids ◽  
Tube Heat Exchanger ◽  
Heat Transfer Capacity ◽  
Mass Flow Rates ◽  
Shell And Tube

A simulation model of Organic Rankine Cycle (ORC) was developed with HYSYS software driven by R245fa, with NOVEC7000 and R141b as working fluids and Fluegas of boilers as a heat source of shell and tube Heat Exchanger to generate large scale electricity. The initial working condition was in subcooled liquid and steady state condition. R141b was found to generate the highest electricity power increment in specific mass flow rates and inlet pressures of Expander because of approaching its critical temperature to inlet Fluegas temperature. Howeever, in terms of economic considerations and cost of shell and tube Heat Exchanger that related to total heat transfer capacity, NOVEC7000 is the optimum selection. Furthermore, R245fa has the highest total effiiciency of ORC compared with other working fluids in this study.

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