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700 MW级水电机组 1

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9 %~12 % Cr 钢 1

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700 m级钢管混凝土拱桥设计与建造可行性研究

郑皆连,王建军,牟廷敏,冯智,韩玉,秦大燕

《中国工程科学》 2014年 第16卷 第8期   页码 33-37

摘要:

以500 m级钢管混凝土拱桥的设计和成套施工技术为基础,对700 m级钢管混凝土拱桥的设计和建造技术进行可行性研究,确定总体设计和施工方案研究结果表明,建造700 m级的钢管混凝土拱桥已不存在技术门槛,综合考虑经济、安全等因素,是该跨径级别的强力竞争桥型之一,应尽早进行工程实践和推广。

关键词: 桥梁工程     700 m跨径级别     钢管混凝土拱桥     设计     建造    

Structure improvement and strength finite element analysis of VHP welded rotor of 700°C USC steam turbine

Jinyuan SHI,Zhicheng DENG,Yong WANG,Yu YANG

《能源前沿(英文)》 2016年 第10卷 第1期   页码 88-104 doi: 10.1007/s11708-015-0387-1

摘要: The optimized structure strength design and finite element analysis method for very high pressure (VHP) rotors of the 700°C ultra-super-critical (USC) steam turbine are presented. The main parameters of steam and the steam thermal parameters of blade stages of VHP welded rotors as well as the start and shutdown curves of the steam turbine are determined. The structure design feature, the mechanical models and the typical position of stress analysis of the VHP welded rotors are introduced. The steady and transient finite element analysis are implemented for steady condition, start and shutdown process, including steady rated condition, 110% rated speed, 120% rated speed, cold start, warm start, hot start, very hot start, sliding-pressure shutdown, normal shutdown and emergency shutdown, to obtain the temperature and stress distribution as well as the stress ratio of the welded rotor. The strength design criteria and strength analysis results of the welded rotor are given. The results show that the strength design of improved structure of the VHP welded rotor of the 700°C USC steam turbine is safe at the steady condition and during the transient start or shutdown process.

关键词: 700°C ultra-super-critical unit     steam turbine     very high pressure rotor     structure strength design     strength design criteria     finite element analysis    

三峡工程巨型水轮发电机组设计与实践

邵建雄,刘景旺,袁达夫

《中国工程科学》 2011年 第13卷 第7期   页码 104-110

摘要:

分析了三峡水轮发电机组设计中必须考虑的主要问题;总结了所进行的关键技术研究;通过关键技术问题研究,使得三峡水轮发电机组参数达到最优化。机组运行结果表明三峡水轮发电机组性能良好,能够长期安全、稳定、高效运行,从而有效地验证了对三峡巨型水轮发电机组的总体技术设计是科学合理的。

关键词: 三峡工程     700 MW级水电机组     单机容量     设计研究     运行稳定性     实践    

Cooling performance of grid-sheets for highly loaded ultra-supercritical steam turbines

Dieter BOHN , Robert KREWINKEL , Shuqing TIAN ,

《能源前沿(英文)》 2009年 第3卷 第3期   页码 313-320 doi: 10.1007/s11708-009-0036-7

摘要: In order to increase efficiency and achieve a further CO-reduction, the next generation of power plant turbines will have steam turbine inlet temperatures that are considerably higher than the current ones. The high pressure steam turbine inlet temperature is expected to be increased up to approximately 700°C with a live steam pressure of 30MPa. The elevated steam parameters in the high and intermediate pressure turbines can be encountered with Ni-base alloys, but this is a costly alternative associated with many manufacturing difficulties. Collaborative research centre 561 “Thermally Highly Loaded, Porous and Cooled Multi-Layer Systems for Combined Cycle Power Plants” at RWTH Aachen University proposes cooling the highly loaded turbines instead, as this would necessitate the application of far less Ni-base alloys. To protect the thermally highly loaded components, a sandwich material consisting of two thin face sheets and a core made from a woven wire mesh is used to cover the walls of the steam turbine casing. The cooling steam is led through the woven wire mesh between the two face sheets to achieve a cooling effect. The wire mesh provides the grid-sheet with structural rigidity under varying operating conditions.In the present work, the cooling performance of the grid-sheets will be investigated applying the conjugate heat transfer method to ultra-supercritical live and cooling steam conditions for a section of the cooling structure. The behaviour of the flow and the heat transfer in the grid-sheet will be analyzed in detail using a parameter variation. The numerical results should give a first prediction of the cooling performance under future operating conditions.

关键词: steam turbines     700&     deg     C-technology     numerical inverstigation     cooling    

700 °C 及以上蒸汽温度下先进USC发电厂用耐热材料的研究和开发 Review

Fujio Abe

《工程(英文)》 2015年 第1卷 第2期   页码 211-224 doi: 10.15302/J-ENG-2015031

摘要:

欧洲、美国、日本已开展蒸汽温度为700 °C 及以上的先进超超临界(A-USC) 发电厂用材料开发项目,以实现更高能效和低二氧化碳排放量。近年来中国、印度等也开展了上述项目的开发和研究。这些项目涉及采用镍基合金更换马氏体9%~12%Cr 钢以用于最高温度的锅炉和涡轮部件,从而在700 °C 及以上温度下提供充足的蠕变强度。

关键词: 镍基合金     9 %~12 % Cr 钢     蠕变强度     蠕变疲劳性质     焊缝     晶界     显微结构     &gamma     &prime     M23C6 碳化物    

标题 作者 时间 类型 操作

700 m级钢管混凝土拱桥设计与建造可行性研究

郑皆连,王建军,牟廷敏,冯智,韩玉,秦大燕

期刊论文

Structure improvement and strength finite element analysis of VHP welded rotor of 700°C USC steam turbine

Jinyuan SHI,Zhicheng DENG,Yong WANG,Yu YANG

期刊论文

三峡工程巨型水轮发电机组设计与实践

邵建雄,刘景旺,袁达夫

期刊论文

Cooling performance of grid-sheets for highly loaded ultra-supercritical steam turbines

Dieter BOHN , Robert KREWINKEL , Shuqing TIAN ,

期刊论文

700 °C 及以上蒸汽温度下先进USC发电厂用耐热材料的研究和开发

Fujio Abe

期刊论文