The Study On Reliability Of Tree-Shaped Heat-Supply Network

The central heating being acting as more and more important role, becomes modernized important infrastructural facilities of city. Concentrating the district heating line system operation reliably or not concerns people's regular life and industry directly. But with the increase of the scale of central heating net and the years of being put in use, malfunction occurrence rate is also increasing. And it's becoming the problem demanding prompt solution to research malfunction working condition and reliability. At the same time , with the development of hot meterage of mark of family,quantity of heat starts the trend marketplace as the commodity , so reliability of heating addition is becoming the key question of heat addition branch. Therefore, for improving reliability of heating net, swearing to supply heat mass and cuting down a pipe network, the accident , it demands to have brought forward higher request to the pipe network.The article is given out methods and principles that count the malfunction stream of the heating net components, and it brings forward the equivalent formula of the minor load linking up with the trunk line and the quantization of the pipe net components in order to simplify calculation of reliability of the tree-shaped heat-supply netwok.In this article the calculation formula on the tree-shaped heat-supply netwok reliability index has been deduced. At the same time according to the characteristic of tree-shaped heat-supply netwok, it has given the cut-out appraising the probability as probability index of the most distant consumer. This index has ensured that regularity of the most disadvantageous consumer using heat , especially standardize the structure of tree-shaped heat-supply netwok.In this article according to the time model for room cooling and the time of pipeline servicing it has deduced the maximal permission caliber value of the tree-shaped heat-supply netwok , and then got the load value recommending. This will restrict the scale of tree-shaped heat-supply netwok better , diminish the coverage when there will be the malfunction in the pipe net, and guaranty the regular using heat of consumer.At last, it has analysed the measure for improving the reliability of the tree- shaped heat-supply netwok, the different forms of the tree-shaped heat-supply netwok and the affection to the reliability of heat source location of the tree-shaped heat-supply netwok.