Research And Application On Variable-Flow Transmission And Distribution System Of Centralize Heating

With the rapid development of heating transmission and distribution system, especially in wide applications of variable-frequency technology, the traditional method, that designers choose cycle pumps according to available head pressure of the farmost consumer, is not save energy. In this traditional method, the regulation valves consume at least 30% energy, which is very wasteful.The advancing of Dynamic Distributed System, changed the traditional network which has centralized dynamic system into the separated dynamic system, avoiding the energy wasted by valves, in ordei to save energy resources. On the basis of the analyses on traditional District Heating System and adjusting, the thesis gives some analyses on the Dynamic Distributed District Heating System.This paper based on concrete conditions of baotou thermal general corporation heat source plant,carried out analysis and calculation of hydraulic regime of heating network,suggesting implementation of multi-heat-source combination operation,using in branch network to modification. Also analysis variation of energy saving rate curve of different zero pressure point control scheme and estimate index curve of initial investment,carried out multistage pump scheme of preconcentration,take three typical schemes to do economy analysis,determined ideal interval of best scheme,it has good economy and worths to popularization and application.