供热管网连通可靠度研究

Connectedness reliability of district heating network

为了评价供热管网拓扑结构可靠性,针对空间管网模型,提出系统中热源与热用户的连通问题,建立4个连通可靠度指标,并基于所有热源与所有热用户的连通问题提出了管段的连通重要度;分析多热源多环供热管网的连通可靠度,评价了位于热源出口干线、回路和公共管上各管段的连通重要度.计算结果表明:多热源、环状的管网结构具有较高的连通可靠度水平;管段距热源的距离越近,连通重要度越高;热源出口干线的管长对热源供热的可靠度有重要的影响.管网连通可靠度评价有助于优化管网拓扑结构设计.

For evaluating the reliability of topology of district heating network,connectedness between heat sources and heat users was proposed based on spatial network model.Four indices of connectedness reliability were established to describe heat supplying from heat sources and heat flowing into heat users.The connected-ness importance of pipe was then put forward on the basis of the connectedness reliability from all heat sources to all users.The connectedness reliability of heating network with multi-sources and multi-loops was analyzed,as well as the connectedness importance of pipes on main pipelines,loops and common pipelines.Analysis shows that the connectedness reliability of heating network with multi-sources and multi-loops was considera-ble.The closer the distance between pipe and source,the higher the connectedness importance of pipe.The length of the main pipe is important to the system reliability.