Taking a heat-supply system in Jinan City for investigated subject, the heat loss rate of steam heat-supply network and hot water heat-supply network is analyzed and calculated.

以济南市某供热系统为研究对象，分析计算了蒸汽、热水热网的热损失率，提出了降低蒸汽热网热损失率的办法。

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Urban area heat supply network or, especially the medium pressure steam piping network, has tremendous difficulties in getting through and locating in downtown, and also the heat compensation.

城市供热管网，尤其是中压蒸汽管网，管线穿越市区，布置难度大，热补偿问题难于解决。

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By the use of the pinch point technique the all LTS heat exchange network is optimized in design, and the new network process obtained does not need external supply of steam.

利用夹点技术对全低变换热网络进行优化设计，得到的新网络流程不需要外供蒸汽。

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