数据中心环状空调水系统计算分析
Calculation and analysis of annular air conditioning water systems in data centers
摘要：
大型数据中心空调设计通常采用水冷冷水系统，需满足出现单点故障时，不影响制冷系统正常运行。空调水系统多设计为环状管网、双立管系统，因此，多环路、双向供水管网的水力计算分析成为难点。针对某数据中心，介绍了一种可行的计算方法，即管网平差法。利用管网平差法借助Excel中VBA编程，分别对供水管网、回水管网进行水力计算分析。同时，考虑常规计算处理方法即多点故障断开为支状管网进行水力计算。通过对比分析可知，利用管网平差法计算的水泵扬程比常规计算方法减小27.6%，有利于设计时水泵的选型。
Abstract：
The water-cooled chilled water system is usually used in the air conditioning design for large data centers, and it needs to meet the requirement of the normal operation of the refrigeration system in the event of a single point failure. The air conditioning water system is mostly annular pipe network and double riser system, so the hydraulic calculation and analysis of multi-loop and two-way water supply network becomes difficult. Aiming at a data center, presents a feasible calculation method—pipe network adjustment method. By using the method, with the help of VBA programming in Excel, carries out the hydraulic calculation and analysis of water supply network and water return network, respectively. At the same time, the conventional calculation method is considered, that is, the multi-point fault disconnection as a branch pipe network for the hydraulic calculation. Through comparative analysis, finds that the pump head calculated by the pipe network adjustment method is 27.6% less than that by the conventional calculation method, which is beneficial to the selection of the water pump in the design.
Keywords:datacenter,singlepointfailure,annularpipenetwork,pipenetworkadjustmentmethod,hydrauliccalculation,airconditioningwatersystem