Study on new high-efficiency coupling heating technology of cogeneration unit

WANG Zulin; LIANG Zhanwei; ZHANG Lei; QIAO Jiafei; WANG Shunsen

doi:10.19666/j.rlfd.202107145

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Study on new high-efficiency coupling heating technology of cogeneration unit

更新时间：2025-09-28

- Study on new high-efficiency coupling heating technology of cogeneration unit
- Thermal Power Generation Vol. 51, Issue 1, Pages: 130-138(2022)
- 作者机构：
  
  1. 神华河北国华定州发电有限责任公司
  2. 国家能源集团新能源技术研究院有限公司
  3. 西安交通大学能源与动力工程学院
- 作者简介：
- 基金信息：
- DOI：10.19666/j.rlfd.202107145
  CLC： TM621
- Published：2022
- 稿件说明：
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WANG Zulin, LIANG Zhanwei, ZHANG Lei, et al. Study on new high-efficiency coupling heating technology of cogeneration unit[J]. Thermal power generation, 2022, 51(1): 130-138.
DOI：

WANG Zulin, LIANG Zhanwei, ZHANG Lei, et al. Study on new high-efficiency coupling heating technology of cogeneration unit[J]. Thermal power generation, 2022, 51(1): 130-138. DOI： 10.19666/j.rlfd.202107145.

摘要

热电联产机组多种新型高效供热技术耦合供热是实现热能梯级利用和提高资源综合利用效率的有效途径之一。提出了一种新型高效的耦合供热技术方案

建立了基于热量分析法和?分析法的能效评价方法

计算了纯凝工况、抽汽供热工况、耦合供热工况的热效率、热指数、供电煤耗及供热煤耗。结果表明:基于热量分析法计算得到耦合供热方式比抽汽供热的热效率高19.59百分点、热指数高2.61百分点、供电煤耗低76.23 g/(k W·h);基于?分析方法计算得到耦合供热方式比抽汽供热的?效率高3.61百分点、?指数高0.60百分点、供电煤耗降低21.62 g/(kW·h)、供热煤耗降低0.09 kg/GJ;基于?分析法得到的抽汽供热的供电煤耗反而比纯凝工况的供电煤耗高;通过对抽汽供热的抽汽工况对比得到全厂最大供电量工况。研究结果为新型高效供热技术应用提供参考。

Abstract

The coupling heating of various new high-efficiency heating technologies is one of the effective ways to realize cascade utilization of thermal energy and improve the efficiency of comprehensive utilization of resources for cogeneration units. A new high-efficiency coupling heating technology scheme is proposed. The energy efficiency evaluation methodology is established based on heat analysis method and exergy analysis method. The thermal efficiency

heat index

net coal consumption and heating coal consumption of pure condensing condition

steam extraction heating condition and coupling heating condition are calculated. The results show that

based on the heat analysis method

the thermal efficiency

heat index and net coal consumption of coupling heating mode are 19.59 percentage points higher

2.61 percentage points higher

and 76.23 g/(kW·h) lower than that of steam extraction heating condition

respectively. Based on the exergy analysis method

the exergy efficiency

exergy index net coal consumption

and coal consumption for heating of coupling heating mode are 3.61 percentage points higher

0.60 percentage point higher

21.62 g/(kW·h) lower

and 0.09 kg/GJ lower than that of steam extraction heating condition

respectively. The net coal consumption of steam extraction heating condition is contrarily higher than that of pure condensing condition. The maximum power supply condition is obtained by the comparison of the steam extraction conditions. The research results provide a reference for the application of new high-efficiency heating technology.

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