NDLI: Design by Finite Element Analysis on Tubesheet of Heat Exchanger With a Central Hole

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Li, Guo Zhao, Jianping
Copyright Year	2011
Abstract	As one of major components of heat exchanger, tubesheet is of paramount importance to enhance the safety of heat exchanger whether its design is reasonable. As the diversity of the heat exchangers’ operating condition, structures of tubesheets also become very special. A fixed tubesheet heat exchanger with a central pipe whose diameter is greater than other heat exchanger tubes is presented in this paper. A central hole in tubesheet will weaken the stiffness and intensity of the tubesheet and cause local stress concentration along the central hole’s edge. However, there is no design method for this kind of tubesheet with a central hole and it is unable to be calculated using various international standards available. In this paper, finite element analysis code ANSYS is used to simulate the real complex structure, real loads and boundary conditions of the tubesheet so that the design problem can be visualized. The three-dimensional finite element model of the tubesheet is built considering the influence of tube channel, partial shell and heat transfer tube bundle. The different pressure in shell-side and tube-side will cause the mechanical stress. The temperature gradient exists widely and the tubesheet, shell as well as heat transfer tubes can’t transform freely. Therefore, there may exists high thermal stress due to the high temperature difference in shell-side and tube-side. The thermal stress has great impact on the total stress distribution. So the simulation of the temperature field is very important. By means of thermal analysis coupling with structure analysis, the distribution of temperature, stress and deformation is obtained. Through evaluating the stress intensity of the tubesheet, it is found that the dangerous region is located at the edge of the tube distribution region and local stress concentration along the edge of the central hole is not obvious. The result shows that the tubesheet is appropriately designed and the design by finite element analysis method is feasible. This paper provides a solution for this kind of structure’s analysis design in engineering application.
Sponsorship	Pressure Vessels and Piping Division
Starting Page	755
Ending Page	760
Page Count	6
File Format	PDF
ISBN	9780791844519
DOI	10.1115/PVP2011-57867
Volume Number	Volume 1: Codes and Standards
Conference Proceedings	ASME 2011 Pressure Vessels and Piping Conference
Language	English
Publisher Date	2011-07-17
Publisher Place	Baltimore, Maryland, USA
Access Restriction	Subscribed
Subject Keyword	Stress concentration Temperature Deformation Design methodology Shells Heat exchangers High temperature Pressure Stress Temperature gradient Design Finite element model Simulation Engineering standards Boundary-value problems Stiffness Finite element analysis Safety Thermal analysis Pipes Heat transfer Thermal stresses
Content Type	Text
Resource Type	Article

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