改进型1 000 MW汽轮机变背压热力特性试验研究

doi:10.11930/j.issn.1004-9649.201711159

中国电力 ›› 2018, Vol. 51 ›› Issue (4): 81-88.DOI: 10.11930/j.issn.1004-9649.201711159

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改进型1 000 MW汽轮机变背压热力特性试验研究

包劲松¹, 秦攀¹, 楼可炜¹, 朱梅芳^1,2, 吴瑞康¹, 李俊²

1. 国网浙江省电力有限公司电力科学研究院, 浙江杭州 310014;
2. 杭州意能电力技术有限公司, 浙江杭州 310014

收稿日期:2017-11-22 修回日期:2018-01-08 出版日期:2018-04-05 发布日期:2018-04-12
作者简介:包劲松(1971-),男,浙江宁波人,高级工程师,从事汽轮机热力性能及节能减排相关技术研究,Email:baojinsong@sina.com。
基金资助:
浙江省基础公益研究计划项目（LGG18F020012）。

Experimental Study on Thermodynamic Characteristics of Optimized 1 000 MW Steam Turbines with Variable Back Pressure

BAO Jinsong¹, QIN Pan¹, LOU Kewei¹, ZHU Meifang^1,2, WU Ruikang¹, LI Jun²

1. Zhejiang Electric Power Research Institute of State Grid Corporation, Hangzhou 310014, China;
2. Hangzhou E. Energy Electric Power Technology Co., Ltd., Hangzhou 310014, China

Received:2017-11-22 Revised:2018-01-08 Online:2018-04-05 Published:2018-04-12
Supported by:
This work is supported by Zhejiang Fundamental Public Welfare Research Funding Project (No.LGG18F020012).

摘要/Abstract

摘要： 汽轮机运行背压变化不仅影响热力性能，还因排汽比容的改变对低压缸运行效率造成较大影响。通过不同负荷变背压试验，对东汽改进型1000MW汽轮机变背压热力特性进行了试验研究，得出了背压对出力、热耗的影响关系式和低压缸效率与排汽容积流量关系曲线，并对低压缸工作特性进行分析，估算出该汽轮机极限运行背压，提出了提高低压缸运行效率的建议。试验结果与分析表明，这台配置1200 mm末级叶片的汽轮机具有较高的低压缸效率、良好的变背压特性和低压缸工作特性。但是，由于低压缸实际工作特性与设计预期存在一定偏差，对机组运行经济性将产生不利影响。

关键词: 1 000 MW机组, 汽轮机, 背压, 低压缸效率, 排汽容积流量

Abstract: The variations of steam turbine operating back pressure will impact not only the thermal performance, but also the operation efficiency of the LP casing greatly because of the change of the exhaust volume flow. Through the back pressure variation test under different loads, the thermodynamic characteristics subject to the back pressure changes are studied for the Dongfang optimized 1000-MW steam turbine, from which the influencing formulas of the back pressure on the output and the heat rate are obtained as well as the relationship curve between the LP casing efficiency and the exhaust volume flow. The operating characteristics of the LP casings are analyzed, and the operation back pressure limits of the turbine are estimated. At last, suggestions are put forward on improving the operation efficiency of the LP casings. The test results and analysis show that the turbine equipped with 1 200-mm last stage blade has higher efficiency and better working characteristics of the LP casings in the back pressure variation, while the economic performance of the unit will be deteriorated due to the deviation between the actual working characteristics and the design expectations of the LP casings.

Key words: 1 000-MW unit, steam turbine, back pressure, efficiency of LP casing, exhaust volume flow

中图分类号:

TK267

包劲松, 秦攀, 楼可炜, 朱梅芳, 吴瑞康, 李俊. 改进型1 000 MW汽轮机变背压热力特性试验研究[J]. 中国电力, 2018, 51(4): 81-88.

BAO Jinsong, QIN Pan, LOU Kewei, ZHU Meifang, WU Ruikang, LI Jun. Experimental Study on Thermodynamic Characteristics of Optimized 1 000 MW Steam Turbines with Variable Back Pressure[J]. Electric Power, 2018, 51(4): 81-88.

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https://www.electricpower.com.cn/CN/Y2018/V51/I4/81

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改进型1 000 MW汽轮机变背压热力特性试验研究

Experimental Study on Thermodynamic Characteristics of Optimized 1 000 MW Steam Turbines with Variable Back Pressure

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改进型1 000 MW汽轮机变背压热力特性试验研究

Experimental Study on Thermodynamic Characteristics of Optimized 1 000 MW Steam Turbines with Variable Back Pressure

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