Changing the flow mass at different stages may decrease the power consumption of water pump in hot water heat supply network.
热水供热管网采用分阶段改变流量质调节可以减少循环水泵耗电量。
At the same time, a water flow sensor was used to achieve the control of water supply pump which can provide suitable water pressure.
同时使用水流传感器检测用户用水信号实现对用水循环泵的控制以提供合适的供水压力；
The developed piezoelectric pump can be driven directly by the utility electric power supply system and its flow rate can be adjusted by a resistor voltage divider.
所设计的压电泵可直接利用日常照明电驱动，可通过电阻分压的方法实现压电泵的流量调节。
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