摘要
针对供热改造中因抽汽压力过高导致的节流损失问题,提出一种利用抽汽余压发电后再供热的策略。该策略将高压力抽汽先用于发电,再进行供热,实现能量梯级利用。基于某600 MW热电联产机组实际运行参数,建立包含抽汽余压发电系统的热力系统模型,运用Ebsilon软件进行变工况热平衡仿真分析,并依据热力学第一定律评估供热系统热经济性指标。结果表明,此策略可在保证供热效果的同时,有效回收抽汽余压能量,提高机组能源综合利用效率。供热期间发电煤耗可降低3.58 g/kWh,节能效果明显,为火电机组供热改造提供了新的技术思路。
Aiming at the problem of throttling loss caused by excessively high extraction steam pressure in heating renovation,a strategy of generating electricity by utilizing the residual pressure of extraction steam and then providing heating is proposed.This strategy first uses high-pressure extracted steam for power generation and then for heating,achieving stepwise utilization of energy.Based on the actual operating parameters of a 600 MW cogeneration unit,a thermal system model including the extraction steam residual pressure power generation system is established.The Ebsilon software is used to conduct variable working condition thermal balance simulation analysis,and the thermal economic indicators of the heating system are evaluated in accordance with the first law of thermodynamics.The results show that this strategy can effectively recover the residual pressure energy of the extracted steam while ensuring the heating effect,and improve the comprehensive utilization efficiency of the unit's energy.During the heating period,the coal consumption for power generation can be reduced by 3.58 g/kWh,with obvious energy-saving effects,providing a new technical idea for the heating transformation of thermal power units.
作者
孟永伟
赵爱忠
肖官和
段丽
王晓维
MENG Yongwei;ZHAO Aizhong;XIAO Guanhe;DUAN Li;WANG Xiaowei
出处
《节能》
2025年第9期140-142,共3页
Energy Conservation
关键词
热电联产
能量梯级利用
余压利用
节能降耗
combined heat and power
energy cascade utilization
utilization of residual pressure
energy-saving and consumption reduction
