Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
644729 | Applied Thermal Engineering | 2016 | 10 Pages |
Abstract
In this paper, the thermal stress and fatigue fracture of a single tube for the solar tower molten salt receiver are presented. First, the temperature distribution of the tube is simulated. Second, the thermal stress is calculated by solving stress equations. Then the minimum heat flux formula is derived when damage occurs on wall based on the yield criterion and heat conduction equation. Finally, the critical crack length on outer wall is investigated by using the Crack Tip Opening Displacement (CTOD) method. The results show that the distribution of stress is similar to that of inner/outer wall temperature difference. The maximum stress, which causes plastic deformation, occurs on outer wall. According to the minimum heat flux formula qâ¥[Ïs]/(KA2+B2+C2âABâACâBC) derived in this paper, the heat flux is only 0.19âMWâ
mâ2 when damage appears on the receiver tube if the inlet temperature and safety factor are 560âK and 1.5 respectively. Furthermore, the critical crack length is 17âmm when the heat flux is 0.7âMWâ
mâ2.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Fluid Flow and Transfer Processes
Authors
Bao-Cun Du, Ya-Ling He, Zhang-Jing Zheng, Ze-Dong Cheng,