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隨著經濟的發展,大量的企業飛速發展,對于數據處理業務的需求也快速提升,相繼建設了很多數據中心。應急冷源系統作為數據中心的重要組成部分,對于保障數據中心的安全起到至關重要的作用。電子信息系統機房,特別是大型互聯網數據中心(Internet Data Center)簡稱IDC ,機房里的IP網絡設備耗電量、發熱量都非常大,導致數據中心機房的電源、空調需求量比傳統通信機房大得多,這類機房的環境溫度嚴重超標和電源缺乏足夠保障已成為制約IDC業務發展的一個瓶頸。這類系統的空調要求全年24小時不間斷供冷。而對于空調系統出現的以下幾個問題:

冷水機組在正常供冷過程中遇到單點故障時會進入故障保護狀態,在電力供應恢復后,離心式冷水機組的壓縮機導葉先恢復至正常開機的初始狀態,再經過冷水機組控制系統對冷水循環水泵、冷卻水循環水泵、冷卻塔等相關部件進行巡檢,并確認正常運行后,冷水機組才能正常啟動。這段恢復過程所需要的時間在咨詢相關生產廠家后得到最短需要約1min,最長需要約15min。

在常規電力系統發生故障時,備用的柴油發電機組可以緊急啟動提供后備電力,從柴油發電機組啟動至穩定供電的過程所需時間約為3min。

采用雙冷源系統,在斷電時間內,即使是備用冷源,也起不了作用,同時對UPS的容量的要求比較高,增加了一倍以上的初投資。

斷電期間,機組的反應時間是比較慢的,這樣系統在短時間里面是無法運行的,而此時電子信息系統運行釋放的大量熱量無法散發出去,機房溫度上升,必將影響機房系統的正常運行。

這幾個方面的原因導致了常規空調系統在電力系統發生故障時有一定的局限性。

     現在通常在數據中心項目中使用蓄冷罐作為應急冷源,可防止突然停電或機器故障引起制冷中斷事故,可提供空調系統10幾分鐘的冷水供應,確保機房10幾分鐘的冷水供應,通水減少了UPS的容量配置,降低了系統初投資。


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