ON-LINE CALCULATION METHOD OF EXHAUST STEAM' S ENTHALPY

YAN Shun-lin; WANG Jun-youNorth China Electric Power University

doi:10.19666/j.rlfd.2008.04.007

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ON-LINE CALCULATION METHOD OF EXHAUST STEAM' S ENTHALPY

更新时间：2025-09-28

- ON-LINE CALCULATION METHOD OF EXHAUST STEAM' S ENTHALPY
- Thermal Power Generation Issue 4, Pages: 28-32(2008)
- 作者机构：
  
  华北电力大学
- 作者简介：
- 基金信息：
- DOI：10.19666/j.rlfd.2008.04.007
  CLC： TK262
- Published：2008
- 稿件说明：
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YAN Shun-lin, WANG Jun-youNorth China Electric Power University. ON-LINE CALCULATION METHOD OF EXHAUST STEAM' S ENTHALPY[J]. Thermal power generation, 2008, (4): 28-32.
DOI：

YAN Shun-lin, WANG Jun-youNorth China Electric Power University. ON-LINE CALCULATION METHOD OF EXHAUST STEAM' S ENTHALPY[J]. Thermal power generation, 2008, (4): 28-32. DOI： 10.19666/j.rlfd.2008.04.007.

摘要

汽轮机排汽比焓的在线计算是火电机组热力性能试验及性能在线监测中的重要环节

而现有的汽轮机排汽比焓在线计算方法均在不同程度上存在一定的局限性。采用常用的排汽比焓计算方法

即能量平衡法、曲线外推法、等效焓降法、弗留格尔公式法、相对内效率法分别对某台N220-12.7型汽轮机的排汽比焓进行了实例计算。通过对计算结果的分析比较

得出这几种计算方法各自的适用条件及其改进措施。

Abstract

The on-line calculation of exhaust steam's enthalpy for steam turbines is an important link in thermodynamic performance test and on-line supervision of thermal power units.At present

the calculation method of exhaust steam's enthalpy has certain limitations in varying degree

hence

it is necessary to analyse and compare the algorithms of exhaust steam's enthalpy.The commonly used calculation methods for exhaust steam's enthalpy are as follows:energy balancing method

curve's extrapolation method

equivalent enthalpy drop method

Fulugel formula's method

and relative internal efficiency method.By using these said methods

the exhaust steam's enthalpy of a N220-12.7 type steam turbine has been calculated respectively as concrete examples.Through analysis and comparison of the calculation results

the individual condition of application and measures of improvement for these said calculation methods have been obtained .

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