There will be 3 vertical cooling water pump set in circulation water pump workshop, with 3 cooling water heat-exchangers for the system.
循环水泵房布置3台立式冷却水泵，系统配备三台冷却水热交换器。
Based on the monostable circuit, using the IC NE555, a kind of hot water circulation automatic heat preservation system was designed.
利用时基ic NE555接成的单稳态电路，设计了一种热水循环自动保温系统。
The configuration and variable frequency adjusting speed of water circulation pump in city heat-supply system are introduced, and the effects of energy saving are analyzed.
对城市供热系统中循环水泵的配置及变频调速进行了介绍，分析了其节能效果。
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