城市供热管网系统蓄热研究与优化

Research and optimization of heat storage in urban heating pipe network system

基于北京市某小区居住建筑的供暖季逐时热负荷,建立城市供热管网系统的一部分进行数值模拟计算,提出了一种新的蓄热调节方法。使用数值模拟分析此蓄热调节方法的蓄热能力、移峰填谷能力及其在供暖季的运行情况。结果表明此蓄热方式在供暖季运行中不会造成供热管网系统热损失的大幅增加;所搭建的供热管网系统模型具有一定的日内蓄热量,且日内蓄热量随室外平均温度的增加而增加;此模型在供暖季供热管网系统的总蓄热量占热电厂热源供暖季热输出的21.19%;此蓄热方式可以大幅提高热电厂热源供热的灵活性,不会明显增加热电厂热源在供暖季的总热输出。

Based on the hourly heat load of a residential building in Beijing during the heating season,a part of the urban heating pipe network system is established for numerical simulation,and a new heat storage adjustment method is proposed.The heat storage capacity,peak shifting and valley filling capacity of the heat storage regulation method and its operation in heating season were analyzed by numerical simulation.The results show that this heat storage method will not cause a substantial increase in the heat loss of the heating pipe network system in the heating season.The built heating pipe network system model has a certain amount of daily heat storage,and the daily heat storage increases with the increase of outdoor average temperature.The total heat storage of this model in the heating season heating pipe network system accounts for 21.19%of the heat output of the heat source heating season of the thermal power plant;this heat storage method can greatly improve the flexibility of heat source heating in thermal power plants,and will not significantly increase the total heat output of heat source in thermal power plants during the heating season.