Presents the on - off control mode of refrigerating machine by supply and return water temperature difference and load proportion with an example 摘要以具体的工程实例介绍了利用供回水温差和机组负荷百分数进行机组台数启停控研究制的方法。
2.
There are many units in an urban drainage pumping station where the flow usually varies from season . the side - inlet sump is often designed to save the area of the pumping station 城市排水泵站常年运行的流量变化一般很大，配泵机组台数较多，为节省占地面积，常采用布置较紧凑的侧向进水方式。
