TThe 975 project is one of the most important municipal projects in Tianjin city's infra-construction facilities. However, it is very difficult for the project to get heating resource of pollution free because it locates in a region with dense buildings. The technology of space heating by using linkage-running approach with some associated heating-resources has been put forward to solve the problem, in which the deposed wasted-water of city and lake water are treated as main pollution free energy resources, while the geothermal water of the Tertiary system is treated as ancillary and peak adjusting heating resources. The results of its application indicate that the technology has been satisfactory and has solved the problem of energy shortage in 975 project successfully, thus meeting the basic demands of cooling, heating and hot water for life

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