最大面积法确定三联供系统容量

Maximum Rectangular Area Method in Determining Capacity of CCHP Systems

冷热电三联供系统已成为建筑节能的重要途径和发展方向,本文以苏州某CBD区域建筑为例,基于相同类型建筑实测数据,获得建筑冷热电8760 h逐时负荷曲线,并基于此提出一种简单新方法(最大面积法)确定三联供系统最佳容量,分析了该CBD区域建筑导入三联供系统的可行性。结果表明:基于逐时热负荷曲线采取"最大面积法"确定的CBD建筑三联供方案有较好的一次能源利用效率(超过50%)和经济性(静态回收年限小于5年)。

Taken CBD buildings as examples, this paper analyzed their energy consumption characteristics based on the real-time data of similar CBD buildings and drew the Load Demand Duration Curves （LDDC）. Then a new method, Maximum Rectangular Area （MR）, was proposed to determine the capacity of CCHP and study the feasibility of CCHP for CBD buildings in Suzhou. Results show that CBD buildings are suited for CCHP in Suzhou if selected a reasonable equipment＇s size obtained by the method proposed, MRA, and gain a high Primary Energy Utilization Efficiency （PEUE） over 50% and a attractive benefit, whose Payback Period （PBP） is less than 5 years.