| Based on the analysis to the characteristic of the district heating system, this paper expatiate the influence of the performance of circulating-pump to heating system. A design project is raised to rebuild a circulating-pump in district heating system, combined with the method of numerical simulation. From the research, it is made out that the reformation to the pump is very important for district heating system to improve its efficient performance, and the method of numerical simulation to optimal design also show great effect.
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