RT Journal Article
T1 Dynamic performance and stress analysis of the steam generator of parabolic trough solar power plants
A1 González Gómez, Pedro Ángel
A1 Gómez Hernández, Jesús
A1 Ferruzza, D.
A1 Haglind, F.
A1 Santana Santana, Domingo José
AB The thermal stress on thick-walled components, such as tubesheets and steam drums, limits both the temperature ramp-up rates and the temperature differences between outer and inner walls. The cyclic operation of concentrating solar power plants may lead to fatigue damage. For these reasons, a stress analysis of the steam generator is required to assure its lifetime.  A methodology is presented for the thermo-mechanical analysis of the steam generator for a parabolic trough power plant. This methodology consists of coupling transient thermodynamic and stress models of the heat exchangers in order to calculate the stress. Besides the heat exchanger models, a transient model for a TEMA H heat exchanger is proposed. Finite element simulations are carried out to calculate the deviations of the simplified analytical models. In this way, a powerful tool that allows the analysis and optimization of the steam generator operation is proposed.  The results suggest that U-tube tubesheets are exposed to high thermal stresses on the no-tube-lane zone, especially in the reheater. The steam generator start-up can be accomplished in around 45 min using 36.4 MWh(th). Furthermore, the TEMA X evaporator presents a thermal stress reduction of 35% compared to the kettle evaporator.
PB Elsevier
SN 1359-4311
YR 2019
FD 2019-01-25
LK https://hdl.handle.net/10016/32352
UL https://hdl.handle.net/10016/32352
LA eng
DS e-Archivo
RD 18 jul. 2024