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Stress Analysis of Steam-Methane Reformer Tubes

ldris, Muhammad Hazri (2011) Stress Analysis of Steam-Methane Reformer Tubes. Universiti Teknologi Petronas. (Unpublished)

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Abstract

Steam-methane reformer tubes operate at temperature exceeding 800°C and are designed to last about 100,000 hours of service. However, the life achieved can be significantly shorter due to creep failure of the reformer tube. In order to reliably predict the performance of the tube, good estimation of the stresses acting at any point along the tube length and thickness is required. Finite Element Method (FEM) will be used to perform the stress analysis of the tube and the analysis will consider the variation in stresses along the tube length and thickness due to temperature and pressure differences, in addition to service life. The analysis was conducted by using ANYSY software. The model is a two dimensional axisymmetric model. The main advantage to use a 2D axisymmetric model compared to a full 3D model is the reduced calculation time and it is easier to change subtle details to the geometry. Two different types of analyses were conducted; stress analysis due to internal pressure and stress analysis due to difference in temperature along the tube. For the first analysis, it was shown that the Von Misses Stress is highest at the inner wall of the tube and lowest at the outer wall. For the second analysis, it was shown that the Von Misses Stress is highest at the inner wall of the tube and lowest at the middle of the tube. The Von Misses Stress is decreasing from inner wall to the middle wall but then increasing to the outer wall.

Item Type: Final Year Project
Academic Subject : Academic Department - Mechanical Engineering - Automotive - Chassis - Chassis stress analysis
Subject: T Technology > TJ Mechanical engineering and machinery
Divisions: Engineering > Mechanical
Depositing User: Users 2053 not found.
Date Deposited: 09 Oct 2013 11:07
Last Modified: 25 Jan 2017 09:42
URI: http://utpedia.utp.edu.my/id/eprint/8595

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