Stabilizing operation of a solar aided power generation (SAPG) plant by adjusting the burners' tilt and attemperation flows in the boiler

被引：14

作者：

Huang, Chang ^{[1
]}

Hou, Hongjuan ^{[1
]}

Hu, Eric ^{[2
]}

Yu, Gang ^{[1
]}

Peng, Hao ^{[3
]}

Zhao, Jin ^{[4
]}

Yang, Yongping ^{[1
]}

机构：

[1] North China Elect Power Univ, Natl Thermal Power Engn & Res Ctr, Beijing 102206, Peoples R China

[2] Univ Adelaide, Sch Mech Engn, Adelaide, SA 5005, Australia

[3] Univ Florida, Dept Mech & Aerosp Engn, Gainesville, FL 32611 USA

[4] State Grid Energy Conservat Serv Co Ltd, Beijing, Peoples R China

来源：

ENERGY | 2019年 / 173卷

关键词：

SAPG plant; Stable operation; Transient models; Mechanism; Steam temperature; PERFORMANCE; ENERGY; SYSTEM; INTEGRATION; DESIGN; AREAS; FIELD; HEAT;

D O I：

10.1016/j.energy.2019.02.139

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Solar Aided Power Generation (SAPG) technology has been proved to be one of the most efficient ways to integrate solar energy into a coal-fired power plant. However, previous studies on SAPG systems have mainly focused on their design and design optimization. There are few studies on their operation. In an SAPG plant, solar heat is used to replace the extracted steam to preheat feedwater. However, the introduction of solar energy inevitably affects the steam flow rate through the boiler, especially when the SAPG plant is in fuel-saving operation mode, thus affecting the boiler's operation. Namely, the steam parameters at the boiler outlets would change with various solar inputs if no control mechanism were applied. A mechanism for adjusting the burners' tilt and attemperation flows in the boiler is therefore proposed in this study, in order to stabilize the temperature of the steam at the outlet of the boiler. To simulate the effectiveness of the mechanism, a transient model of the SAPG plant, including a series of modules for key components in the plant, has been developed in this study. The simulation results in a case study of a 300 MWe SAPG plant, showing the proportion of heat that was absorbed in the boiler was redistributed due to the solar input, without adjusting the burners' tilt and attemperation flows, resulting in temperature drops of superheated/reheated steam when in a fuel-saving mode. However, the simulation in the case study also shows that by swinging the burner tilt angle up to 22.7 degrees and adjusting the attemperation flows in the super-heaters and re-heaters in the boiler, the superheated/reheated steam temperature can be restored from 523 degrees C and 510 degrees C respectively back to 543.0 degrees C, the desired temperature. (C) 2019 Elsevier Ltd. All rights reserved.

引用

页码：1208 / 1220

页数：13

共 27 条

[1] Energy, exergy, economic and environmental (4E) analyses of a conceptual solar aided coal fired 500 MWe thermal power plant with thermal energy storage option [J].