Finite Element Analysis and Experimental Investigation of Tubesheet Structure

Qian, Chen; Yu, Hongjie; Yao, Lu

doi:10.1115/1.3027456

Cited by 8 publications

(4 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The allowed stress values provided within the standard are based on simplified membrane stress analysis caused by the loads originating from pressure of working fluid only. Other load, such as the thermal load, causes different type of stress which is not included in safety norms and standards [2,[4][5][6][7][8][9][10]. It should be emphasized that the procedure of calculation given in existing standards introduces safety factors especially in calculation of wall thickness.…”

Section: Introductionmentioning

confidence: 99%

Experimental and numerical stress and strain analysis of the boiler reversing chamber tube plate

et al. 2022

View full text Add to dashboard Cite

Boilers are one of the most used units for both heat generation plants and industry systems. Their operation is subjected to different working loads and maintenance requirements. Exploitation experience points out critical boiler zones where failures and break downs typically occur. This paper analyzes critical zones in hot water fire-tube boiler. Experimental procedure was performed on the model of this type of boilers and its critical element. The tube plate of hot water boiler was identified as the most critical one. Experimental analysis and numerical model verification were performed using Aramis system based on 3D Digital Image Correlation method. Numerical analysis was done in Ansys Software Package and verification of results was done based on measurements obtained by strain gauges and local measurements performed by the Aramis system. Stress-strain analysis indicates the critical zones of boiler tube plate. The character of change parameters such as strain and stress occurring in the critical zones can be verified both by experimental and numerical data. The paper presents a novel approach in experimental and numerical analyses that can be conducted in similar units and used for existing unit optimization, as well as for new product testing on different loads and provide opportunity for further development and improvement for practical industrial application.

show abstract

Section: Introductionmentioning

confidence: 99%

Experimental and numerical stress and strain analysis of the boiler reversing chamber tube plate

et al. 2022

View full text Add to dashboard Cite

show abstract

“…The results showed that the obtained experimental data were in agreement with the finite element simulation data, proving the feasibility of the finite element analysis method. Qian et al [17] used different elements to establish a finite element analysis model of a fixed tubesheet structure composed of a tubesheet, shell and heat exchange tubes and conducted corresponding experiments. A comparison the finite element analysis results with experimental measurement results under pressure load and thermal load revealed that the beam element and shell element can achieve satisfactory results, providing a simplified method for overall model analysis.…”

Section: Introductionmentioning

confidence: 99%

Study of Tube Pretension Effects on the Strength of the Flat-Round Tubesheet in a Quench Boiler

Zhao

Guo-min²,

Liu³

et al. 2022

ChemEngineering

View full text Add to dashboard Cite

A quench boiler is the key equipment in ethylene production for the rapid cooling of high-temperature cracking gas. In the boiler, heat transfer is occurs between the hot cracking gas passing through the inner heat exchange tubes with an average temperature of 385 °C and cold water (or boiler water) passing through the inner heat exchange tubes with an average temperature of 350 °C. Required for double-pipe heat transfer, special tubesheets formed by welding flat-round tubes side by side are difficult to design, as no suitable design code is available. The thermal expansion difference between the inner heat exchange tubes and the jacketed tubes could lead to high thermal stress on the tubesheet. In this study, we investigated the effects of pretension or prestretching of the heat exchange tubes on stress distribution and strength assessment of the flat-round tubesheet in a quench boiler under two dangerous load conditions. Results show that without prestretching the heat exchange tubes, the flat-round tubesheet cannot pass the strength assessment. Prestretching the heat exchange tubes is necessary, and a pretension of 9 mm is most suitable. The magnitude of the pretension of the heat exchange tubes should be determined based on the thermal expansion difference between the inner heat exchange tubes and the jacketed tubes, with consideration of the strength improvement of the flat-round tubesheet.

show abstract

“…For example, the allowed stress values provided within the standard are based on simplified membrane stress caused by the loads originating from pressure of working fluid only. Other load, such as the thermal load, causes different type of stress which is not included in safety norms and standards [2][3][4][5][6][7][8]. It is also important to note, that the calculations provided in the existing norms and standards impose a certain allowed safety factor for the stress calculations and for calculating the wall thickness while adopting at the same time the first major value for standard thickness.…”

Section: Introductionmentioning

confidence: 99%

Construction optimization of hot water fire-tube boiler using thermomechanical finite element analysis

et al. 2018

View full text Add to dashboard Cite

Exploitation experience of hot water boiler plants indicates relatively frequent and permanent breakdowns resulting from the accident state of various elements of the boiler. In addition to the damages caused by the corrosion processes and inadequate management of the plant, the phenomena of fatigue of boiler elements exposed to high pressures and temperatures can occur. Due to high pressure and temperature certain boiler elements are exposed to, high strain and stress of these elements can eventually lead to breakdowns. In this paper, a hot water fire tube boiler, produced by "Minel-Kotlogradnja" Belgrade, type TE110V, installed within the plant "Technical Faculties" at Faculty of Mechanical Engineering in Nis, Serbia, is analyzed. Thermomechanical stress-strain analysis is performed with loads typically occurring during operation. Finite element analysis is performed using ANSYS Workbench 17 Software package, while the CAD model is formed using SOLID WORKS 2015. The results were used to investigate and to give recommendations for the thickness of tube plate of the first reversing chamber based on determined functional dependence of equivalent stress in the tube plate from the thickness of the plate. The noted functional dependence was determined by Kriging response surface based on results of virtual numerical experiment with different thicknesses of the tube plate.

show abstract

Finite Element Analysis and Experimental Investigation of Tubesheet Structure

Cited by 8 publications

References 5 publications

Experimental and numerical stress and strain analysis of the boiler reversing chamber tube plate

Experimental and numerical stress and strain analysis of the boiler reversing chamber tube plate

Study of Tube Pretension Effects on the Strength of the Flat-Round Tubesheet in a Quench Boiler

Construction optimization of hot water fire-tube boiler using thermomechanical finite element analysis

Contact Info

Product

Resources

About