COMPARISON OF ANALYSIS METHODS FOR INFLUENCE OF BACK DRESSURE VARIATION UPON THERMAL ECONOMIC EFFICIENCY OF THE UNIT

YANG Yun-chao1; CHANG Shu-guang1; CHENG Gang-qiang2; FU Wen-feng21.Ruzhou Ruiping Coal and Electricity Co Ltd

doi:10.19666/j.rlfd.2008.04.008

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COMPARISON OF ANALYSIS METHODS FOR INFLUENCE OF BACK DRESSURE VARIATION UPON THERMAL ECONOMIC EFFICIENCY OF THE UNIT

更新时间：2025-09-28

- COMPARISON OF ANALYSIS METHODS FOR INFLUENCE OF BACK DRESSURE VARIATION UPON THERMAL ECONOMIC EFFICIENCY OF THE UNIT
- Thermal Power Generation Issue 4, Pages: 33-36(2008)
- 作者机构：
  
  1. 汝州瑞平煤电有限公司
  2. 华北电力大学
- 作者简介：
- 基金信息：
- DOI：10.19666/j.rlfd.2008.04.008
  CLC： TM621
- Published：2008
- 稿件说明：
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YANG Yun-chao1, CHANG Shu-guang1, CHENG Gang-qiang2, et al. COMPARISON OF ANALYSIS METHODS FOR INFLUENCE OF BACK DRESSURE VARIATION UPON THERMAL ECONOMIC EFFICIENCY OF THE UNIT[J]. Thermal power generation, 2008, (4): 33-36.
DOI：

YANG Yun-chao1, CHANG Shu-guang1, CHENG Gang-qiang2, et al. COMPARISON OF ANALYSIS METHODS FOR INFLUENCE OF BACK DRESSURE VARIATION UPON THERMAL ECONOMIC EFFICIENCY OF THE UNIT[J]. Thermal power generation, 2008, (4): 33-36. DOI： 10.19666/j.rlfd.2008.04.008.

摘要

由于受诸多因素的影响

汽轮机组排汽压力(背压)经常发生变化

确定背压变化对机组热经济性的影响对机组运行和节能分析都具有重要意义。对确定背压对热经济性影响的两种计算方法进行了详细分析和比较

指出每种方法的优缺点和适用条件。通过实例计算

认为等效焓降法是其中较为便捷、准确的计算方法

并具有广泛的适用性

满足工程计算的需要。

Abstract

Owing to influence of many factors

the exhausteam pressure (back pressure)is frequently varying.Determining the influence of back pressure variation upon thermal efficiency of the unit has very important significance to analyse operation and energy-saving of the unit.Two methods for determining influence of back pressure variation upon thermal economic efficiency have analysed and compared in detail

pointing out individual merits and weakness

as well as the conditions of application for each of them.Through calculation of concrete examples

it is believed that the equivalent enthalpy method is more conveniet and accurate calculation method

and has wide applicability

satisfying the requirements of calculation in engineering.

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