Fatigue-Creep Lifetime Analysis of Four Advanced Central Receiver Concepts

摘要

Four Advanced Central Receiver (ACR) concepts were analyzed for their fatigue-creep design lifetimes under the guidelines of ASME Boiler and Pressure Vessel Code Case N-47 (1592). Using the flux profiles provided by the designers, the thermal hydraulic performance of an individual tube in a receiver panel was ascertained by computer analysis. A linear model of the tube crown strain for the tube on given supports was then constructed. At the location of highest strain two-dimensional thermal and structural finite element analyses were performed. The computed stresses and strains were used in evaluation of the creep and fatigue design lifetimes by N-47 and compared to the desired lifetime of 30 years. Three of the four designs met or exceeded the desired lifetime and the fourth met the desired lifetime when the factor of safety incorporated in N-47 was reduced. All four designs were judged adequate for the current level of design effort. (ERA citation 06:008851)