基于“热负荷三角区”法的热电联产能耗分析与优化  

Energy Efficiency Analysis and Optimization of Coal-fired CHP based on “Low Heat-load Triangle”

作　　者：王磊[1,2] 赵加宁[1] 丁立群[1] 廖春晖[1] 

机构地区：[1]哈尔滨工业大学市政环境工程学院,黑龙江哈尔滨150090 [2]东北电力大学能源与动力工程学院,吉林吉林132012

出　　处：《湖南大学学报（自然科学版）》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)

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.

关 键 词：区域供热 热电联产 三角区 能源效率 

分 类 号：TK01[动力工程及工程热物理]