Structural analyses of a dish reflux pool-boiler receiver
Coupled thermal-structural finite element calculations of a dish-type reflux pool-boiler solar receiver were performed to characterize the operating stresses and to address issues affecting the service life of the receiver. All calculations were performed using ABAQUS, a general purpose finite element code, and finite elements specifically formulated for coupled thermal-structural analysis. The receiver response was simulated for a combination of structural and thermal loads that represent the startup and operating conditions of the receiver. A shell element model was used to characterize the operating stresses and investigate design optimization. The shell model was analyzed for various aft dome thickness to determine an optimum thickness. More detailed analyses with continuum elements were used to assess the vulnerability of a seam-weld to fatigue crack growth. Treating the well-notch as a crack tip, the stress intensity factor was computed using the J-integral method. The computed stress intensity factor was below the fatigue threshold for most steels, indicating that the seam-weld should meet design requirements. 10 refs., 13 figs.
- Research Organization:
- Sandia National Labs., Albuquerque, NM (United States)
- Sponsoring Organization:
- DOE; USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC04-76DP00789
- OSTI ID:
- 5945951
- Report Number(s):
- SAND-91-1312C; CONF-920436--1; ON: DE91017453
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
141000* -- Solar Collectors & Concentrators
36 MATERIALS SCIENCE
360104 -- Metals & Alloys-- Physical Properties
ALLOYS
AUSTENITIC STEELS
CHROMIUM ALLOYS
CHROMIUM-NICKEL STEELS
CHROMIUM-NICKEL-MOLYBDENUM STEELS
COMPUTER CALCULATIONS
CORROSION RESISTANT ALLOYS
DESIGN
FATIGUE
FINITE ELEMENT METHOD
HEAT RES
HIGH ALLOY STEELS
IRON ALLOYS
IRON BASE ALLOYS
JOINTS
MECHANICAL PROPERTIES
MOLYBDENUM ALLOYS
NICKEL ALLOYS
NUMERICAL SOLUTION
SOLAR RECEIVERS
STAINLESS STEEL-316L
STAINLESS STEELS
STEEL-CR17NI12MO3-L
STEELS
STRESS ANALYSIS
STRESSES
WELDED JOINTS