一、引言 城市集中供热是我国目前提高能源利用率和减少城市环境污染的一项重要措施,无疑在新建区可以得到广泛的应用。但对于旧市区,特别是那些建筑密度大,厂房和民房犬牙交错、人口稠密度很大的市区发展集中供热,在管道敷设等方面会遇到很多的困难,必须对诸如供热参数、热网规模、管道 I. INTRODUCTION Urban central heating is an important measure for China’s current efforts to increase energy efficiency and reduce urban environmental pollution. It is undoubtedly widely used in newly built areas. However, for the old urban areas, especially those with high density of buildings and concentrated heating in urban areas where factories and private houses are intertwined and densely populated, there will be many difficulties in the laying of pipelines, such as heating parameters, Thermal network scale, pipeline