区域供能地下敷设输配管网传热分析方法
Heat transfer analysis of buried pipes in district heating and cooling system
摘要：
地下敷设是区域供能输配管网的主要敷设方式，其传热计算用于确定保温层厚度、输配管网附加负荷、热损坏可能性。分析了影响地下敷设管网传热的因素，包括：流体与土壤之间的温差、管道的保温隔热性能、埋深、土壤导热系数以及相邻管道之间的间距。介绍了基于热阻的简化稳态计算方法，该方法极大地简化了计算工作量，且计算结果能够满足工程需要，同时该方法适用于大多数地下敷设管网的形式，可供工程设计人员参考。
Abstract：
Buried pipe network is the main way of distribution system in district heating and cooling systems, and its heat transfer calculation is used to determine the thickness of the insulation layer, accessory load of distribution system, and the possibility of thermal damage. Analyses the factors that influence the heat transfer calculation of buried pipe network, including temperature difference between fluid and soil, pipe insulation properties, depth, soil thermal conductivity and distance between adjacent pipes. Present the steady-state thermal calculation method based on thermal resistance formulations, which greatly simplifies the computational effort, and the calculated results can meet project needs. This method is suitable for the majority types of buried pipe network, so it can be used as reference for engineering design.
Keywords:distribution network, underground buried, thermal resistance, steady-state method, calculation