Dynamic performance and stress analysis of the steam generator of parabolic trough solar power plants

Research output: Contribution to journalJournal article – Annual report year: 2019Researchpeer-review

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Dynamic performance and stress analysis of the steam generator of parabolic trough solar power plants. / González-Gómez, P.A.; Gómez-Hernández, J.; Ferruzza, D.; Haglind, F.; Santana, D.

In: Applied Thermal Engineering, Vol. 147, 2019, p. 804-818.

Research output: Contribution to journalJournal article – Annual report year: 2019Researchpeer-review

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@article{2261240820b6463982b341d5f6ad817b,
title = "Dynamic performance and stress analysis of the steam generator of parabolic trough solar power plants",
abstract = "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 minutes using 36.4 MWhth. Furthermore, the TEMA X evaporator presents a thermal stress reduction of 35{\%} compared to the kettle evaporator.",
keywords = "Steam generator, Start-up, Thermal Stress, Parabolic trough power plant, Solar thermal power",
author = "P.A. Gonz{\'a}lez-G{\'o}mez and J. G{\'o}mez-Hern{\'a}ndez and D. Ferruzza and F. Haglind and D. Santana",
year = "2019",
doi = "10.1016/j.applthermaleng.2018.10.126",
language = "English",
volume = "147",
pages = "804--818",
journal = "Applied Thermal Engineering",
issn = "1359-4311",
publisher = "Pergamon Press",

}

RIS

TY - JOUR

T1 - Dynamic performance and stress analysis of the steam generator of parabolic trough solar power plants

AU - González-Gómez, P.A.

AU - Gómez-Hernández, J.

AU - Ferruzza, D.

AU - Haglind, F.

AU - Santana, D.

PY - 2019

Y1 - 2019

N2 - 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 minutes using 36.4 MWhth. Furthermore, the TEMA X evaporator presents a thermal stress reduction of 35% compared to the kettle evaporator.

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 minutes using 36.4 MWhth. Furthermore, the TEMA X evaporator presents a thermal stress reduction of 35% compared to the kettle evaporator.

KW - Steam generator

KW - Start-up

KW - Thermal Stress

KW - Parabolic trough power plant

KW - Solar thermal power

U2 - 10.1016/j.applthermaleng.2018.10.126

DO - 10.1016/j.applthermaleng.2018.10.126

M3 - Journal article

VL - 147

SP - 804

EP - 818

JO - Applied Thermal Engineering

JF - Applied Thermal Engineering

SN - 1359-4311

ER -