基于空间结构视角的区域分布式能源系统能耗特性分析

Energy analysis and optimization for district distributed energy system based on the viewpoint of spatial structure

以区域分布式能源系统为研究对象,构建了考虑建筑容积率影响的需求侧负荷评估模型,考虑泵功耗和热损失的输配侧管网模型,以及供给侧能耗评价模型。针对不同类型区域的数值分析表明:对于任一特定区域,均存在最佳冷、热管网管径,使得主管网功耗最小;管网流量变化会影响最佳管径的选择以及相应的管网功耗;就区域空间结构而言,建筑容积率的提高将有效提升区域分布式能源系统的节能效果;对任一特定用户,存在某最小临界容积率,以确保区域分布式能源系统的节能性;配管密度亦会影响区域总能耗。

Taking the regional distributed energy system as the research object, this paper develops a load assessment model considering the influence of plot ratio, a pipeline model considering the pump power and heat losses, as well as a supply-side energy assessment model. According to the simulation results of various districts, for a specific area, there exists an optimal pipe diameter which can minimize the energy consumption of the pipeline system. Moreover, the change of pipeline flow may also affect the selection of the optimal pipe diameter and corresponding pipeline energy consumption. On the other hand, from the viewpoint of urban spatial structure, an increase in the plot ratio may enhance the energy performance of the distributed energy system. For a specific user, there exists a minimum plot ratio, which can guarantee the energy benefits of the distributed energy system. Furthermore, the density of pipeline may also influence the energy performance of the distributed energy system.