Boiler efficiency calculation method for heat loss outside the system boundary

WANG Hongwu; LIU Huan; YU Longwen; YANG Rongzu; MU Qiwei; ZHANG Ben; ZHAI Pengcheng; XIE Tian; MA Tingshan

doi:10.19666/j.rlfd.202303047

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Boiler efficiency calculation method for heat loss outside the system boundary

更新时间：2025-09-28

- Boiler efficiency calculation method for heat loss outside the system boundary
- Thermal Power Generation Vol. 52, Issue 12, Pages: 140-146(2023)
- 作者机构：
  
  1. 西安热工研究院有限公司
  2. 西安西热节能技术有限公司
- 作者简介：
- 基金信息：
- DOI：10.19666/j.rlfd.202303047
  CLC： TM621.2
- Published：2023
- 稿件说明：
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WANG Hongwu, LIU Huan, YU Longwen, et al. Boiler efficiency calculation method for heat loss outside the system boundary[J]. Thermal power generation, 2023, 52(12): 140-146.
DOI：

WANG Hongwu, LIU Huan, YU Longwen, et al. Boiler efficiency calculation method for heat loss outside the system boundary[J]. Thermal power generation, 2023, 52(12): 140-146. DOI： 10.19666/j.rlfd.202303047.

摘要

对用于系统边界外设备的热量进行分析，能量转换位置在GB/T 10184中的锅炉边界外，不能利用现有标准进行锅炉效率计算。将热风外用损失热量分为热风回用和热风不回用2类，基于GB/T 10184的计算框架，提出这2类热风外用损失的计算方法。以某350 MW机组锅炉作为实际算例，在相同负荷下连续进行投运热风外用和停运热风外用2个对比工况。依据实际测试数据和化验结果，利用该计算方法对实际运行工况进行对比，定量分析热风外用对锅炉效率的影响。计算结果表明：2个工况燃用煤质、飞灰、炉渣可燃物化验结果基本相当；冷风回收的工况T01热风外用损失为0.82%，冷风不回收的热风外用损失为0.13%，工况T02热风外用损失为0；工况T01、工况T02实测锅炉效率分别为93.10%、94.00%，投运热风外用系统使锅炉效率下降约0.9百分点。

Abstract

For the analysis of the heat applied to equipment outside the system boundary

the energy utilized was outside the GB/T 10184 standard

and the boiler efficiency calculation could not take advantage of the existing standard. The external heat loss of hot air was divided into two categories: hot air reuse and hot air non-reuse. Based on the GB/T 10184 calculation framework

the calculation methods of these two categories of external heat loss of hot air were proposed. Taking a 350 MW boiler as a practical example

under the same load

continuous operation of hot air external use and shutdown of hot air external use were compared. According to the actual test data and analysis results

the calculation method was used to compare the actual operating conditions. The influence of external loss of hot air on boiler efficiency was analyzed. The results showed that the test results of combustible materials in two working conditions were basically the same. The external loss of hot air in T01(cold air recovery)was 0.82%

the external loss of hot air(cold air nonrecovery) was 0.13%

and the external loss of hot air in T02 was 0. The measured boiler efficiency in T01 and T02 conditions was 93.10% and 94.00% respectively. The operation of external hot air system reduced the boiler efficiency by about 0.9 percentage point.

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