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制冷系统的变频如何进行合理设计?

作者:admin 来源:本站 发布时间:2018-3-26 19:16:16

由于季节、昼夜和用户负荷的变化,空制冷系统常常会在部分负荷下运行,据统计,制冷系统在满负荷情况下运行只占20~30%。在70%一80%的时间是在部分负荷下运行,而空调系统中的冷却泵机组和冷冻水泵机组都在固定的大流量下工作,一般冷冻水设计温差为5~7℃,冷却水的设计温差为4~6℃,在系统流量固定的情况下,全年绝大部分运行时间温差仅为1~3℃,即在温差低、流量大的情况下工作,增加了管路系统的能量损失,浪费了水泵运行的输送能量。
Because of the change of season, day and night and user load, the air cooling system often runs under partial load. According to statistics, the refrigeration system runs at full load only 20 to 30%. In 70% to 80% of the time is running under partial load, cooling pump and chilled water pump unit of air-conditioning system in large flow fixed work, the general design of chilled water temperature of 5~7 DEG C, design temperature difference of cooling water is 4~6 DEG C, the system flow is fixed, the vast majority of operation time temperature is only 1~3 degrees, which is working in low temperature difference, large flow, increasing the energy loss of the pipeline system, waste energy transfer pump.

一般空调水泵的耗电量占空调系统耗电的20~30%。因此,节约水泵在低负载时系统供水输出能量具有很重要的意义,所以睫负荷而改变水流量的空调水泵系统就显示出巨大的优越性,这就给我们提出了一个新问题,在部分负荷运行情况下如何设计才能使空调制冷系统符合“节能”的原则,这比在设计工况下提出“能耗”指标更为重要。由于负荷的变化,制冷系统应采用变频设计、中央空调进行变频节能系统,才能使建筑物的节能更上一个台阶。


The power consumption of the general air conditioning water pump accounts for 20 to 30% of the power consumption of the air conditioning system. Therefore, saving water pump in the important water supply system with output energy at low load, so the load change and ciliary water flow of air conditioning water pump system shows great superiority, this gives us a new problem, how to design to make the air conditioning system in line with the principle of "energy saving" in operation part load, which is more than in the design condition put forward the "energy" index is more important. Because of the change of load, the refrigeration system should adopt frequency conversion design and the central air conditioner carry on the frequency conversion energy saving system, in order to make the building energy saving more up.

山东制冷机组
在中央空调设计时为保证在天气温度最高的情况下能满足要求,所以按最大的负荷设计并有15%左右的富裕量,而平时使用时并不能达到满负荷,所以存在较大的裕度,因此我们在选择主机时,应能够确保主机能够根据负载变化自动加载,卸载,当一台机组运行就能够满足负荷要求时,应能停止其他的机组,真正的能够实现变频控制,节约运行费用。
In the central air-conditioning design to ensure can meet the requirements of the highest temperature in the weather, so according to the load design of the biggest and has rich content of about 15%, while in use and can not achieve full load, so there is a big margin, so we in the choice of the host, should be able to ensure that the host can according to the load change automatic loading and unloading, when running a unit can meet the load requirements, should be able to stop the other unit, which can realize the frequency control real, saving operating costs.
一年中负载率在50%以下的时间占全部运行时间的50%以上,一般冷冻水设计温差为5~7℃,冷却水的设计温差为4―6℃,在系统流量固定的情况下,全年绝大部分运行时间温差仅为1~3℃。即在温差低、流量大的情况下工作,增加了管路系统的能量损失,浪费了水泵运行的输送能量。一般制冷水泵的耗电量占空调系统耗电的20%30%。
In a year, the load rate below 50% takes up more than 50% of the total running time. The design temperature of the common chilled water is 5~7 degrees, and the design temperature difference of the cooling water is 4 - 6 degrees. When the system flow is fixed, the temperature difference of most of the running time is only 1~3 degrees throughout the year. When the temperature difference is low and the flow is large, the energy loss of the pipeline system is increased and the energy of the pump running is wasted. The power consumption of the general refrigerating water pump accounts for 20%30% of the power consumption of the air conditioning system.
因此,节约水泵在低负载时系统供水输出能量具有很重要的意义,所以随负荷而改变水流量的空调水泵系统就显示出巨大的优越性,而得到越来越广泛的重视及应用。采用变频器调节泵的转速可以很方便地调节水的流量其节能率通常可达35%~50%左右。因此,变频泵也使我们的优先选择,在运行过程中,使水泵的流量应能够跟随主机匹配调节。
Therefore, it is very important to economize the water supply and output energy of the pump at low load. So the air conditioning pump system that changes the water flow with the load shows great superiority, and has been paid more and more attention and application. Using the frequency converter to adjust the speed of the pump can easily adjust the flow rate of water and the energy saving rate is usually about 35% ~ 50%. Therefore, the frequency conversion pump also makes our priority selection, in the process of operation, the flow of the pump should be able to follow the host matching adjustment.
变频技术在现代制冷系统申的使用已成为必然趋势,因此这不仅能有效改良现代制冷系统的工艺不足,还能大幅降低能耗节省运行成本。因此,在制冷系统中安装变频控制系统并设置自动调节,将使节能效果更好。
The application of frequency conversion technology in the modern refrigeration system has become an inevitable trend. Therefore, it can not only effectively improve the technology shortage of modern refrigeration system, but also greatly reduce energy consumption and save operation cost. Therefore, the installation of frequency conversion control system in the refrigeration system and the setting of automatic regulation will make the energy saving effect better.
有了山东制冷机组http://www.sddszl.cn上面的小总结,希望对广大客户有所帮助,如果有什么不理解的或者寻求帮助的请点击我们的官方网站:或者来电咨询,我们会尽全力为您解决
With a small summary on the http://www.sddszl.cn of Shandong refrigeration unit, we hope to help our customers. If you don't understand something or ask for help, please click our official website: or call for consultation, we will try our best to solve it for you.