INFLUENCE OF BOILER'S DESUPERHEATING WATER UPON THERMAL ECONOMIC EFFICIENCY OF STEAM TURBINE UNITS

PANG Ke; PAN ChengHenan Provincial Electric Power Survey and Design Institute

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INFLUENCE OF BOILER'S DESUPERHEATING WATER UPON THERMAL ECONOMIC EFFICIENCY OF STEAM TURBINE UNITS

Thermal Power Generation Vol. 39, Issue 12, Pages: 10-13(2010)

更新时间：2025-09-28

- INFLUENCE OF BOILER'S DESUPERHEATING WATER UPON THERMAL ECONOMIC EFFICIENCY OF STEAM TURBINE UNITS
- 作者机构：
  
  河南省电力勘测设计院
- 作者简介：
- 基金信息：
- DOI：
  CLC： TM621
- Published：2010
- 稿件说明：
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PANG Ke, PAN ChengHenan Provincial Electric Power Survey and Design Institute. INFLUENCE OF BOILER'S DESUPERHEATING WATER UPON THERMAL ECONOMIC EFFICIENCY OF STEAM TURBINE UNITS[J]. Thermal Power Generation, 2010, 39(12): 10-13.
DOI：

PANG Ke, PAN ChengHenan Provincial Electric Power Survey and Design Institute. INFLUENCE OF BOILER'S DESUPERHEATING WATER UPON THERMAL ECONOMIC EFFICIENCY OF STEAM TURBINE UNITS[J]. Thermal Power Generation, 2010, 39(12): 10-13. DOI：

摘要

基于汽轮机组热力系统矩阵分析法

对某台超超临界1 000 MW汽轮机组进行了热经济性分析

分别计算了锅炉过热器和再热器减温水对汽轮机组热经济性的影响。计算表明

喷水减温对机组热经济性影响较大

在THA工况下减温水流量为80 t/h时

再热器减温水取自给水泵中间抽头

发电煤耗量约上升1.6 g/(kW.h)

取自1号高压加热器(高加)出口给水

其也将上升1.2 g/(kW.h)。因此

应尽量避免采用喷水减温。

Abstract

Based on the matrix analysis method used for thermodynamic system of steam turbine unit

the thermal economic efficiency of one ultra-supercritical 1 000 MW steam turbine unit has been analysed

the influence of desuperheating water for boiler's superheater and reheater upon thermal economic efficiency of unit being calculated respectively.Calculation show that the influence of water-spraying desuperheat upon the thermal economic efficiency is comparatively large

under operating condition of THA

the flow rate of desuperheating water is 80 t/h

the desuperheating water for reheater is taken from the intermediate joint head of feed-water pump

the coal consumption rate for electricity generation will increase 1.6 g/kWh

the feed-water taken from outlet of high-pressure heater no.3 will also increase 1.2 g/kWh.

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