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我国北方地区冬季严寒，城市中多采用集中供热向用户供暖。
It is very cold in the winter in northern china.
District heating system is adopted in city for urban users.
近三十年，无论是在供热规模还是供热技术方面，集中供热事业有很大的发展。
In in recent thirty years,
district heating system has developed greatly in both scale and technology.
随着国民经济的快速发展，节能工作日益受到重视。
With the rapid development of national economy,
more and more attention has been paid to the energy conservation work.
很多研究者在集中供热节能方面做了很多的工作和努力，提出了分布式供热系统。
Many researchers have made a lot of efforts to energy-saving in district heating and proposed distributed heating system.
分布式供热系统将传统的供热系统的单一动力一分为三，
In the distributed heating system,the single dynamic of the traditional heating system is divided into three places .
这种将动力分散后的供热系统能够部分减少甚至全部消除在调节阀上的能耗，
达到节约能源的目的。
The power-distributed heating system can partly reduce or even completely eliminate the energy consumption of control valves to save energy resources.
本论文在对传统的供热管网能耗分析的基础上，对分布式供热系统进行了分析及研究。
On the basis of analyzing the energy consumption of traditional heating pipe network,distributed heating system is analysed and studied in this paper.
本课题主要是对变速泵的动力分布式供热系统——分布式变频供热系统的研究。
This thesis focuses on dynamic distributed district heating system for variable speed pumps--distributed variable frequency pump heating system.
对案例中的典型枝状管网进行分析、计算。
The typical branched network in cases is analyzed and calculated.
从管网的稳定性、调节性和节能效果三方面对动力分布式系统进行讨论。
Distributed heating system is discussed from the three aspects:adjustability ,stability and energy-saving effect of pipe networks.
最后对传统供热系统和分布式系统的初投资情况进行了经济性分析。
Finally,the economy analysis is made on the initial investment of traditional heating system and distributed heating system.
就我国目前国情来看，我国节能工作任重道远。
Judging from the actual conditions of present china,China still shoulder heavy responsibilities on energy conservation work.
因此，加强对分布式供热系统的研究有助于我国集中供热事业的发展。
Therefore,the research on distributed heating system is helpful to the development of district heating system in our country.
本课题意在找到适合于工程实际的方法，以便对分布式系统的设计、运行、管理工作给出重要的指导意见
Our aim is to find a method suitable for practical engineering,so that guidance on design,operation and management of distributed heating system can be suggested.

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