Constructed a more complete motor to adjust soon system, carry out according to the function request by the hot pump water - heater of the CO_2 work.
构造了一个较完整的电机调速系统，实现了基于CO_2工质的热泵热水器所要求的功能。
Points out that the cubic law of pump power is not valid for the cooling water system of central air conditioning for it is an open system. The static head should be the lift in a cooling tower.
指出集中空调冷却水系统为开式系统，一般不适用功率三次方定律，静压头应为冷却塔塔体扬程，并提出了冷却水泵变速时轴功率的计算公式；
The modeling of cold end system was carried out surrounded by its four subsystems, which are condenser, cooling tower, the end of lower pressure cylinder, and circulating water pump.
冷端系统的建模主要围绕其四个子系统展开，即凝汽器、冷却塔、汽轮机低压缸末端以及循环水泵。
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