NDLI: Influence of a Variable in Time Heat Transfer Coefficient on Stresses in Model of Power Plant Components

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Okrajni, Jerzy Twardawa, Mariusz
Copyright Year	2013
Abstract	The paper discusses the issue of modelling of strains and stresses resulting from heating and cooling processes of components in power plants. The main purpose of the work is to determine the mechanical behaviour of power plant components operating under mechanical and thermal loading. Finite element method (FEM) has been used to evaluate the temperature and stresses changes in components as a function of time. Temperature fields in the components of power plants are dependent, among parameters, on variable heat-transfer conditions between components and the fluid medium, which may change its condition, flowing inside them. For this reason, evaluation of the temperature field and the consequent stress fields requires the use of heat-transfer coefficients as time-dependent variables and techniques for determining appropriate values for these coefficients should be used. The methodology of combining computer modelling of the temperature fields with its measurements performed at selected points of the pipelines may be used in this case. The graphs of stress changes as a function of time have been determined for the chosen plant components. The influence of the heat transfer conditions on the temperature fields and mechanical behaviour of components have been discussed.
Sponsorship	Pressure Vessels and Piping Division Nondestructive Evaluation Engineering Division
File Format	PDF
ISBN	9780791855737
DOI	10.1115/PVP2013-97295
Volume Number	Volume 7: Operations, Applications and Components
Conference Proceedings	ASME 2013 Pressure Vessels and Piping Conference
Language	English
Publisher Date	2013-07-14
Publisher Place	Paris, France
Access Restriction	Subscribed
Subject Keyword	Computers Temperature Mechanical behavior Fluids Pipelines Power stations Finite element methods Heat transfer coefficients Modeling Heating and cooling Stress Heat transfer
Content Type	Text
Resource Type	Article

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