VariableSpeed: New variablespeedpumps 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。
2
Proposes methods such as by-pass with chiller, multi-grade pumps and variablespeedpumps 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。
3
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 variablespeedpumps.