During the development of wshp ( water source heat pump ) , the matching of the components and the control system ' s compatibility is paid attention by the manufacturers 在水源热泵的研制开发过程中，系统各部件之间的匹配特性以及适用于热泵机组的控制程序成为众多厂商关注的焦点。
Puts forward a cascade heat pump unit to solve some application problems of conventional units in winter in cold regions , such as high compression ratio and low heating efficiency 摘要提出了一种复叠热泵机组，以解决常规空气源热泵冷热水机组在寒冷地区冬季使用压缩比高、效率低等问题。
Presents main reasons of the compressor damaged in winter by analyzing an accident of the wind cooling heat - pump unit . gives some suggestions for the user and the producer 通过对一起风冷热泵机组压缩机损坏事故的分析，提出机组冬季损坏的主要原因，并提出一些意见和建议供用户和生产厂家参考。
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。
Simulating results show that the novel defrost method can be adaptive depending on the surrounding conditions and the situation of ashp , so is a guideline to the intelligent defrost of ashp 为了进一步拓宽仿真模型的应用，还研究了空气源热泵机组工质替换成新型工质后，系统动态特性的变化情况。
When the motor runs in variable speed drive . there will are be resulted in voltage reflection and common - mode voltage , that those may destroy the motor and cable 当潜油电泵机组工作在变频条件下，特别是当今的变频器均采用较高开关频率的器件，会产生电压反射现象及共模电压问题，破坏电机及电缆。
To save energy , choose high efficiency chillers , and decide the unit number basing on the part - load condition . the number of water pumps should be synchronized with the chillers 空调系统为了节能应该考虑选用高能效比的热泵机组，根据机组部分负荷时的特点和效率确定合理的台数，水泵选取数量与热泵机组相同。
Integrated with the hp data accumulator , a computerize auto - monitoring software was compiled to not only predigest the gather and dispose of test data but also enhance data ' s precision 测试中结合数据采集仪的使用开发了水源热泵机组计算机自动监测软件，简化了测试过程中数据采集和整理的过程，也提高了数据的精确性。
Air - source heat pump ( ashp ) has many unique advantages , such as high efficiency , convenient operation and no pollution to applying areas etc . , so has been broadly used in china , especially in central south area and lack - of - water area 空气源热泵机组具有高效节能、使用方便和不污染使用地区环境的特点，在我国具有广阔的发展空间。
A more suitable control program was developed with plc ( programmable logic controller ) . the water source heat pump computer assistant design software was compiled to reduce time - period of product developments 在理论计算和设备选型的基础之上，编制了水源热泵机组计算机辅助设计软件，对建立产品设计理论和缩短开发周期具有一定的参考价值。
