摘要
在对热负荷延续时间图分析的基础上,指出了引起热电联产供热系统能耗较大的'调峰三角区'和'低效率三角区'.在'三角区'内采用分布式燃气锅炉供热具有显著的节能效益.对不同纬度地区的9个城市'热负荷三角区'的能耗分析与优化结果表明:'低效率三角区'对低纬度采暖地区的供热能耗影响更大.考虑我国的实际情况,在燃气资源丰富、燃气价格不高或城市环境要求较高的地区,采用燃煤热电联产同时配以分布式燃气锅炉调峰的供热方式,是区域供热系统节能的有效措施.应发挥不同类型能源的优势,合理匹配集中式热源与分布式热源,才能使变负荷条件下更具灵活性和可靠性.
This paper analyzed the energy efficiency of small-sized coal-fired Combined Heat and Power（CHP） at part heat-load,and presents the ＂low heat-load Triangle＂ based on heat-load duration diagram.The energy efficiency of coal-fired CHP in the ＂low heat-load Triangle＂ is much lower than separate generation because the heat-load is so little.Therefore,it is an effective way to improve the energy efficiency of CHP plant by minimizing the ＂low heat-load Triangle＂.Separate generation instead of coal-fired cogeneration can be a better scenario in this special area.The study of the CHP district heating in 9 cities of different latitudes in China has shown that distributed gas boilers can be used in the ＂Triangle Areas＂,which can lead to a visible energy saving.But the energy saving rate has a remarkable difference among cities of different latitudes.So the cogeneration and separate generation sources should be reasonably matched for utilization so that the energy saving rate can be considerably enhanced.
出处
《湖南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2012年第4期70-74,共5页
Journal of Hunan University:Natural Sciences
基金
'十一五'国家科技支撑计划重大项目课题(2006BAJ01A04)
关键词
区域供热
热电联产
三角区
能源效率
district heating
CHP
low heat-load triangle
energy efficiency
