Variable Speed: New variable speed pumps offer a noticeable improvement over accumulator tank systems.
可变速的水泵：新的可变速的泵在压力鼓系统上面也有改进。
Proposes methods such as by-pass with chiller, multi-grade pumps and variable speed pumps to optimize series ice storage systems.
对于串联系统，则提出采用制冷机旁通、多级泵和变频泵的方法使系统配置更加合理。
Though setting up the model to calibrating the level control parameter PID, the system dynamic performances is optimized in regulating the upper pool water level by variable speed pumps.
建立了整定水位PID调节器的控制模型，优化变速泵控制前池水位变化系统的动态品质。
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