Finite element model for thermal analysis of ceramic heat exchanger tube under axial non-uniform convective heat transfer coefficient

İslamoğlu, Yaşar

doi:10.1016/j.matdes.2004.01.004

Cited by 24 publications

(2 citation statements)

References 5 publications

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“…The reinforcement stretches faster, which creates additional stresses and eventually cracks appear. The existence of cracks enables the passage of high temperatures into the interior of the concrete and its further damage [9]. With steel, in addition to thermal elongation at high temperatures, there are changes in specific heat capacity and thermal conductivity.…”

Section: Behaviour Of Building Materials Due To Firementioning

confidence: 99%

Thermal analysis of fire effects on fire doors using the finite element method

Nurić,

Varcaković

2024

J. Eng. Appl. Sci.

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The goal of this paper is to use the finite element method and computer simulation to prove the effectiveness in assessing the fire resistance of building construction elements, specifically on the example of the fire resistance of fire doors. For that purpose, data from the building where fire doors with defined characteristics were installed were used. For simulation purposes, numerical modelling with thermal and structural analysis will be used. In this way, the parameters of the temperature distribution on the fire door and the contact material due to fire will be obtained, as well as the distribution of strain and stresses, which will indicate the fire resistance of the used structure. Computer simulation with numerical modelling offers a number of advantages both in the speed of providing results of a larger number of variants of the simulation model and in the accuracy of the results obtained once the model is calibrated. Also, the mentioned type of predicting the effect of fire can be applied to other elements of the structure of the construction object, which can significantly influence the decision-making that will prevent the negative consequences of the occurrence of a possible fire.

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Section: Behaviour Of Building Materials Due To Firementioning

confidence: 99%

Thermal analysis of fire effects on fire doors using the finite element method

Nurić,

Varcaković

2024

J. Eng. Appl. Sci.

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“…Some examples are given, as follows. In a recent study, Islamoglu [8,9] numerically investigated the temperature and thermal stress fields of ceramic heat exchanger tubes with circular fins. The results show that the significant parameters that affect the temperature and stress distributions are the fin diameter and non-uniform heat transfer coefficient.…”

Section: Introductionmentioning

confidence: 99%

Thermal Stress and Deformation of Hollow Paddle-Shaft Components with Internal High Temperature Molten Salt Flow

2020

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Excessive thermal stress and deformation are important reasons causing disservice of high temperature heat exchangers. This paper presents thermal stress and expansion analysis of single-leaf type hollow paddle-shaft components with internal high temperature molten salt flow based on three-dimensional numerical simulations. The results show that the hollow paddles enhance the heat transfer and decrease the maximum thermal stress simultaneously with the expense of a much higher pressure drop than that of solid paddles. The cumulative von Mises stress distribution curve shows that the stress distribution of the component with hollow paddles is more uniform than that with solid paddles. The radial and axial deformations do not differ much for the components with hollow and solid paddles. A larger volume of the fluid space in the hollow paddles leads to stronger heat transfer, smaller maximum thermal stress, and more uniform stress distribution. The effects of the paddle height, the diameter and number of flow holes, the molten salt flow rate, and the material-side heat transfer coefficient are identified. The advantages of hollow paddle designs in both heat transfer and thermal stress (local and overall) performance are revealed. The work in this study can provide a reference for the design and optimization of hollow paddle heat exchangers with high temperature molten salt as working fluid.

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