Key technologies of double reheat &amp;heat regeneration systems for large scale steam turbines

WANG Weiliang; LI Yongsheng

English Version Reader LoginJournal Login

您当前的位置：

首页 >

文章列表页 >

Key technologies of double reheat &heat regeneration systems for large scale steam turbines

更新时间：2025-09-28

- Key technologies of double reheat &heat regeneration systems for large scale steam turbines
- Thermal Power Generation Vol. 42, Issue 11, Pages: 49-53(2013)
- 作者机构：
  
  国电科学技术研究院
- 作者简介：
- 基金信息：
- DOI：
  CLC： TM621
- Published：2013
- 稿件说明：
移动端阅览
WANG Weiliang, LI Yongsheng. Key technologies of double reheat &heat regeneration systems for large scale steam turbines[J]. Thermal power generation, 2013, 42(11): 49-53.
DOI：

WANG Weiliang, LI Yongsheng. Key technologies of double reheat &heat regeneration systems for large scale steam turbines[J]. Thermal power generation, 2013, 42(11): 49-53. DOI：

摘要

介绍了2次再热回热系统的结构形式及其系统所涉及的回热级数、外置蒸汽冷却器、再热点前加热器(HARP)、2次再热以及新型MC系统等关键技术。以超超临界800MW机组为例

对机组分别采用2次再热回热系统、MC系统及1次再热回热系统的经济性进行了比较。结果表明

机组2次再热与1次再热比较主蒸汽压力提高1.4MPa

主蒸汽温度降低5℃

机组热耗下降约226kJ/(kW·h)

热效率提高约1.40百分点;机组MC系统与1次再热系统相比主蒸汽压力提高3.8MPa、主蒸汽温度降低5℃、机组热耗下降约235kJ/(kW·h)、热效率提高约1.45百分点

与2次再热回热系统相比系统效率提高非常小

其技术优势的体现依赖于高背压小汽轮机效率的提高。

Abstract

The structure of the double reheat and heat regeneration system was presented.Key technologies including the number of regeneration stage

the external steam cooler

HARP

double reheat and the new MC system were discussed.Taking an ultra supercritical 800MW unit as the example

comparison between and among the unit applying the double reheat heat regeneration system and that combined with MC system and that applying single reheat heat regeneration system was performed.The results showed that

under the second reheat condition

the main steam pressure increased by 1.4MPa

while the main steam temperature dropped by 5℃

the unit heat consumption decreased by about 226kJ/(kW·h)

and the heat efficiency rose by 1.4%.Compared with the single reheat system

for the MC system

the main steam pressure increased by3.8MPa

while the main steam temperature dropped by 5℃

the unit heat consumption decreased by about 235kJ/(kW·h)

and the heat efficiency rose by about 1.45%.The system efficiency of the MC system increased little than that of the typical double reheat and heat regeneration system.However

the technical advantage of the MC system relies on further improvement of the high back pressure turbine.

关键词

Keywords

references

Views

317

下载量

CSCD

Alert me when the article has been cited

提交

Tools

Publicity Resources

STUDY ON LOAD UNDER ECONOMIC OPERATION OF ULTRA-SUPERCRITICAL UNITS

NON-DESTUCTIVE INSPECTION OF AUTOMATIC WELDING DEFECTS FOR BOILER PIPES WITH SMALL DIAMETER AND LARGE WALL-THICKNESS IN ULTRA-SUPERCRITICAL UNITS

CAUSE ANALYSIS OF REAR PLATEN SUPERHEATER LEAKAGE FOR BOILER OF ULTRA-SUPERCRITICAL UNIT AND REMEDIAL MEASURES THEREOF

STRENGTH ANALYSIS OF HOT EXTRUDED TEE-TYPE UNEQUAL-DIAMETER THREE-WAY JOINT FOR MAIN STEAM PIPELINE OF ULTRA-SUPERCRITICAL UNIT

MEASUREMENT AND CALCULATION METHOD FOR THERMAL PERFORMANCE TEST OF ULTRA-SUPERCRITICAL UNIT WITH STEAM TURBINE EQUIPPED WITH DOUBLE-ROW HIGH-PRESSURE HEATERS

Related Author

LEI Zhao-tuanXi’an Thermal Power Research Institute Co Ltd

ZHU Bao-tian

ZHANG Ya-fu

HOU Zhao-tang21.Huaneng Yuhuan Power Plant

CAI Hui2

SHAO Tian-you1

ZHANG Lei1

XING Cang11.China Huadian Engineering Corporation Ltd

Related Institution

Xi'an Thermal Power Research Institute Co., Ltd

Huaneng Yuhuan Power Plant

Shandong Electric Power School

Beijing University of Science and Technology

China Huadian Engineering (Group) Co., Ltd

AI问答

⁰

Key technologies of double reheat &heat regeneration systems for large scale steam turbines

DOI：

摘要

Abstract

关键词

Keywords

references