热网储能动态仿真及热力学分析  

Dynamic Simulation and Thermodynamic Analysis of Energy Storage in Heat Supply Network

作　　者：雷琪安 种道彤[1] 赵全斌[1] 王进仕[1] LEI Qian;CHONG Daotong;ZHAO Quanbin;WANG Jinshi(State Key Laboratory of Multiphase Flow in Power Engineering,Xi’an Jiaotong University,Xi’an 710049,China)

机构地区：[1]西安交通大学动力工程多相流国家重点实验室,西安710049

出　　处：《工程热物理学报》2024年第10期2965-2973,共9页Journal of Engineering Thermophysics

基　　金：国家重点研发计划国际合作项目(No.2021YFE0112800);陕西省企业院所联合重点专项(No.2023-LL-QY-29)。

摘　　要：为了提高热电联产机组的运行灵活性,本文搭建了350 MW机组与热网动态模型,研究了热网及热用户的动态特性,获得了不同环境温度、热用户温度边界条件下热网的最大蓄热能力以及热网蓄/放热能力对机组调峰能力的影响。结果表明:热网供回水温度、热用户温度均与抽汽流量近似呈线性关系;热网最大蓄热能力随着环境温度的降低增加而减小,当环境温度从0℃降低到-20℃时,最大蓄热能力下降了47.4%;机组调峰能力提升量随环境温度降低略有增加,环境温度从0℃下降至-20℃时,机组调峰能力提升量从6.9 MW增加至9.6 MW;热网热效率随着环境温度与抽汽流量的增加略微提高,但热网的效率较低,并且随着环境温度与抽汽流量的增加明显提高。In order to improve the operational flexibility of cogeneration units,the dynamic model of 350 MW cogeneration unit and heat supply network system is established.The dynamic characteristics of heat supply network and heat user,the maximum heat storage capacity of heat supply network under different ambient temperature and heat user temperature boundary conditions,and the influence of heat storage and heat release capacity of heat supply network on the unit peak load capacity are studied.Results illustrate that the temperature of supply and return water and hot users are linearly related to the extraction flow rate.The maximum heat storage capacity decreases with the decrease of ambient temperature.When the ambient temperature decreased from 0◦C to−20◦C,the maximum heat storage capacity decreased by 47.4%.When the ambient temperature decreases from 0◦C to−20◦C,the adjustment amount on the unit’s peak regulation capacity increases from 6.9 MW to 9.6 MW.The thermal efficiency of the heat supply network is slightly increased with the increase of ambient temperature and extraction flow rate.But the exergy efficiency is low,it obviously increased with the increase of environmental temperature and extraction flow rate.

关 键 词：热电联产 热网蓄热 动态特性 

分 类 号：TM621[电气工程—电力系统及自动化]