Detail publikace
Supercritical CO2 Brayton cycle at different heat source temperatures and its analysis under leakage and disturbance conditions
Zhang, L. Deng, T. Klemeš, J.J. Zeng, M. Ma, T. Wang, Q.
Anglický název
Supercritical CO2 Brayton cycle at different heat source temperatures and its analysis under leakage and disturbance conditions
Typ
článek v časopise ve Web of Science, Jimp
Jazyk
en
Originální abstrakt
Supercritical carbon dioxide (SCO2) Brayton cycle has been widely used in a variety of industrial settings. In this work, three commonly used SCO2 Brayton cycle dynamic numerical models at different heat source temperatures are built with MATLAB and Simulink software, and the key parameters of three commonly used Brayton cycle models (recompression, reheating and intermediate cooling) are compared when the heat source temperature changes from 813 K to 2,113 K. And The steady-state values of the simulation system and experimental values are verified. Under the same component parameter setting, the recompression of the model cycle efficiency at different heat source temperature is generally the highest, followed the reheating mode, and the lowest in the intercooling model. With the increase of heat source temperature, the efficiency of the recompression model gradually improve. Under 5 % leakage condition, the recycling efficiency of the recompression model increases by 2.58 %, while the efficiency of the reheating model and the intercooling model decreases. Sinusoidal disturbance with the amplitude of 12.5 K and period of 8 s is added at the inlet of HTR hot side, compared with intercooling model and reheating model. The efficiency fluctuation amplitude of the recompression model is large, but the power generation is more stable. (C) 2021 Elsevier Ltd. All rights reserved.
Anglický abstrakt
Supercritical carbon dioxide (SCO2) Brayton cycle has been widely used in a variety of industrial settings. In this work, three commonly used SCO2 Brayton cycle dynamic numerical models at different heat source temperatures are built with MATLAB and Simulink software, and the key parameters of three commonly used Brayton cycle models (recompression, reheating and intermediate cooling) are compared when the heat source temperature changes from 813 K to 2,113 K. And The steady-state values of the simulation system and experimental values are verified. Under the same component parameter setting, the recompression of the model cycle efficiency at different heat source temperature is generally the highest, followed the reheating mode, and the lowest in the intercooling model. With the increase of heat source temperature, the efficiency of the recompression model gradually improve. Under 5 % leakage condition, the recycling efficiency of the recompression model increases by 2.58 %, while the efficiency of the reheating model and the intercooling model decreases. Sinusoidal disturbance with the amplitude of 12.5 K and period of 8 s is added at the inlet of HTR hot side, compared with intercooling model and reheating model. The efficiency fluctuation amplitude of the recompression model is large, but the power generation is more stable. (C) 2021 Elsevier Ltd. All rights reserved.
Klíčová slova anglicky
SCO2; Brayton cycle; Heat source; Transient response; Leakage; Disturbance
Vydáno
15.12.2021
Nakladatel
Elsevier Ltd.
Místo
PERGAMON-ELSEVIER SCIENCE LTD, THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
ISSN
0360-5442
Číslo
237
Strany od–do
121610–121610
Počet stran
15
BIBTEX
@article{BUT172178,
author="Jiří {Klemeš},
title="Supercritical CO2 Brayton cycle at different heat source temperatures and its analysis under leakage and disturbance conditions",
year="2021",
number="237",
month="December",
pages="121610--121610",
publisher="Elsevier Ltd.",
address="PERGAMON-ELSEVIER SCIENCE LTD, THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND",
issn="0360-5442"
}