Cold-end integration of thermal system in a 1000 MW ultra-supercritical double reheat power plant

Lin, Xiaolong; Song, Huchao; Wang, Lukai; Guo, Yifan; Liu, Yinhe

doi:10.1016/j.applthermaleng.2021.116982

Cited by 21 publications

(1 citation statement)

References 22 publications

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“…Owing to its inherent safety and higher core outlet temperature (700-950 • C), MHTGR is suitable for high-efficiency power generation and a variety of process heat applications [2][3][4][5][6][7]. The cold-end system [8][9][10] is an important section of an MHTGR nuclear power plant (NPP). This system is used to cool exhaust steam into condensate and discharge waste heat into the external environment, which determines the final parameters of the steam Rankine cycle.…”

Section: Introductionmentioning

confidence: 99%

Influence of Cooling Water Parameters on the Thermal Performance of the Secondary Circuit System of a Modular High-Temperature Gas-Cooled Reactor Nuclear Power Plant

Wang,

Zhao,

et al. 2023

Energies

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This study quantitatively analysed the influence of cooling water parameters on the performance of a modular high-temperature gas-cooled reactor (MHTGR) nuclear power plant (NPP). The secondary circuit system and cold-end system were modelled using EBSILON software, version 16.0. The influence of cooling water inlet temperature and mass flow rate on the thermal performance of the secondary circuit system was analysed over the full power range with the goal of optimising net power. Under 100% rated condition, for each 1 °C increase in cooling water inlet temperature between 10 and 33 °C, the net power and cycle efficiency decreased by 0.67 MW and 0.14%, respectively, whereas the heat consumption rate increased by 28.72 kJ/(kW·h). The optimal cooling water mass flow rates corresponding to cooling water inlet temperatures of 16 °C and 33 °C were obtained. The optimal cooling water mass flow rate decreased nonlinearly with decreasing power levels. At a cooling water inlet temperature of 33 °C, an increase in cooling water mass flow rate from the designed value (7697.61 kg/s) to the optimal value (10,922.14 kg/s) resulted in a 1.03 MW increase in net power. These findings provide guidelines for MHTGR NPP operation optimisation and economic improvement, especially under high-temperature weather conditions.

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Section: Introductionmentioning

confidence: 99%

Influence of Cooling Water Parameters on the Thermal Performance of the Secondary Circuit System of a Modular High-Temperature Gas-Cooled Reactor Nuclear Power Plant

Wang,

Zhao,

et al. 2023

Energies

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Thermodynamic analysis of temperature boosting of hot primary air in an ultra‐supercritical lignite‐fired power plant: Scheme comparison and performance enhancement

Pan,

Li,

et al. 2024

Asia-Pacific J Chem Eng

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Lignite‐fired boilers usually encounter the insufficient drying capacity of the pulverizer due to the inherent drawback of high moisture content in fuel. In this study, four schemes of heat sources for temperature boosting of hot primary air are proposed for an ultra‐supercritical large‐scale single reheat lignite‐fired power plant according to heat sources such as inlet flue gas of air preheater (Scheme 1), the third stage extraction steam (Scheme 2), outlet steam of low‐temperature reheater (Scheme 3), and inlet flue gas of economizer (Scheme 4). The thermodynamic system models are built by using EBSILON Professional software. The thermodynamic performance of the four schemes is analyzed and compared from the perspectives of the first and second laws of thermodynamics. First law analysis indicates that the power generation standard coal consumption of Scheme 3 is reduced by 0.87, 0.42, and 0.04 g·kW−1·h−1 compared with Schemes 1, 2, and 4, respectively. Second law analysis indicates that the exergy loss of Schemes 2–4 is 3.7, 7.6, and 7.5 MW lower than that of Scheme 1. The present study may provide guidance for the energy efficiency improvement of lignite‐fired power plants.

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A data-driven operating improvement method for the thermal power unit with frequent load changes

Zhou,

Zhang,

Zhu

et al. 2024

Applied Energy

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Cold-end integration of thermal system in a 1000 MW ultra-supercritical double reheat power plant

Cited by 21 publications

References 22 publications

Influence of Cooling Water Parameters on the Thermal Performance of the Secondary Circuit System of a Modular High-Temperature Gas-Cooled Reactor Nuclear Power Plant

Influence of Cooling Water Parameters on the Thermal Performance of the Secondary Circuit System of a Modular High-Temperature Gas-Cooled Reactor Nuclear Power Plant

Thermodynamic analysis of temperature boosting of hot primary air in an ultra‐supercritical lignite‐fired power plant: Scheme comparison and performance enhancement

A data-driven operating improvement method for the thermal power unit with frequent load changes

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