Article : [TRIAC084]

Info : REPONSE 74, le 05/02/2002.

Titre : Evaluation of fatigue strength of plate-fin heat exchanger under thermal loading.

Cité dans : [DIV333]  Recherche sur les mots clés thermal + shock + liquid , février 2002.

Meeting : Proceedings of the 1996 8th International Conference on Pressure
Vessel Technology, ICPVT-8.Part 1 (of 2).
Location : Montreal, Can
Date : 21 Jul 1996-26 Jul 1996

Meeting : Proceedings of the 1996 8th International Conference on Pressure
Vessel Technology, ICPVT-8.Part 1 (of 2).

Info : organization : ASME
Location : Montreal, Can
Date : 21 Jul 1996-26 Jul 1996

Source : Fatigue/Fracture, NDE, Materials and Manufacturing Proceedings of the
International Conference on Pressure Vessel Technology, ICPVT v 1
1996.ASME, New York, NY, USA.p 99-106
CODEN : 002677
Année : 1996
Meeting_Number : 47022
Document_Type : Conference Article
Treatment_Code : Theoretical; Experimental
Language : English
Stockage :

Abstract :
In this paper, experimental and analytical studies on the thermal
strength of a Plate-Fin Heat Exchanger (PFHE) are described. Although the
PFHE usually runs under the steady condition, cyclic temperature change
occurs under the abnormal operation.Therefore, the fatigue is expected to
be a most likely failure mode. Analytical and experimental procedures are
used to establish a design method regarding the thermal stress fatigue of
the PFHE. Using a small scale heat exchanger, two types of experiments are
carried out to measure temperature and thermal stresses occurring in the
core.One is a steady state experiment with large temperature gradients.The
other is an unsteady thermal shock experiment where a core is rapidly
dipped into liquid nitrogen. Thermal stresses are analyzed using the
finite element method in which a complex structure of the core is modeled
by shell and truss elements.Simulated stresses are compared with the
measured ones. Also, fatigue tests using brazed test specimens consisting
of a parting sheet and two side bars are performed and fatigue curves are
obtained for various types of brazing conditions.Using these results, the
fatigue life against the thermal loading is evaluated. (Author abstract) 1
Refs.

Accession_Number : 1997(47):8212 COMPENDEX
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