基于负荷特点学校供热方案的优化

Optimization of School Heating Projects Based on Load Characteristics

针对学校建筑能耗大,实际负荷预测难的问题,以北京市某高校新校区目前能源供应方式为基准方案,通过供暖季的现场实测,分析出学校的实际负荷,基于供暖季逐时热电负荷特点,提出热电联供方案,并确定了系统的最佳配置和运行方案,通过建立能源转换图和分析计算,得出系统优化后运行费用节约11.8%,一次能源节约率为12.5%,减少二氧化碳排放4 356.82 t,增益投资回收期为2.7 a。因此,热电联供系统应用在学校具有明显的经济效益和环境效益。

With regard to the problem of high energy consumption in school buildings and the difficulty in actual load forecast,the current energy supply method taken in a new campus of a certain university in Beijing is used as a benchmark project. Through the on-site measurement of the heating season,the actual load of the school is analyzed. Based on the time-dependent thermoelectric load characteristics of the heating season,a cogeneration plan is put forward,and the optimal configuration and operation scheme of the system is determined. Through the establishment of energy conversion charts as well as analysis and calculation,it is concluded that the operating cost savings after the system optimization is 11. 8%,and that the primary energy is saved. The rate is 12. 5%,CO2 emissions are reduced by 4 356. 82 t,and the payback period for gains is 2. 7 years. Therefore,the application of the combined heat and power system in schools embraces obvious economic and environmental benefits.