- 學位論文
機櫃冷卻系統應用資料中心之節能模擬分析
Simulation Analysis on Energy Saving of In-Rack Cooling System in Internet Data Center
摘要
近年來由於電腦網路應用技術發達，電腦軟、硬體技術的成熟，網路傳輸速度越來越快，企業或個人使用者透過網路得到運算服務技術人稱”雲端運算”已浮現，雲端運算的技術開發將更加速人們對網路資料中心(IDC)機房的依賴。由於現今機房安置一般傳統機櫃，空調皆屬開放式冷卻模式，有其一定使用限制，若要因應這一波高密度機櫃的使用其冷卻系統將很難滿足，所以密閉式機櫃型與區域型冷卻型態就因應而生。 本研究以一般傳統IDC電腦機房基礎，改成高密度機櫃且採用密閉式機櫃型冷卻方式，利用eQUEST動態建築模擬軟體進行節能方案的節能評估，預估改善後之節能潛力。傳統IDC機房實際案例之PUE值為1.83，若改成冷熱通道系統其PUE值降為1.72，但在導入密閉式氣冷式一對一冷媒系統冷卻系統方案後PUE值既可降為1.59。若採水冷式一對一冷媒系統結果PUE值可降為1.49；若加入機櫃之free Cooling系統，其PUE值可降為1.49；若採用最佳綜合節能方案PUE值可降為1.44。密閉式機櫃冷卻系統除了具有極高之能源效率之外，將改變傳統IDC機房整體開放式空調冷卻模式，不需考慮冷熱通道及高架地施作，因此其機房佔地面積將減少到原來的一般傳統IDC機房面積27％左右。
並列摘要
Because of the advanced technology of Internet application, the maturity of software and hardware, and the speed-up of Internet data transmission nowadays, the enterprise and individual rely more and more on the remote service, so-called cloud-computing. On the other hand, the development of cloud-computing technology will also encourage the people to rely increasely on Internet Data Center (IDC).Since currently the most of computer racks in IDC are conventional and the cooling method is the open type, which means the racks are cooled by CRACs or CRAHs, the conventional IDC cooling system can not meet the trend of need for high density computer rack in IDC nowadays. Hence the closed type of in-rack cooling system and spot cooling system are under being developed. This research aimed at the energy saving potential analysis of the closed type of cooling system for the high density computer racks in IDC by the dynamic building energy simulation program eQUEST. The results show that improvement of Hot-Aisle/Cold-Aisle layout in IDC will decrease the PUE of the study case of conventional IDC from 1.83 to 1.72. After the retrofit of cooling system by air-cooled DX in-rack cooling system, the PUE will drop to 1.59. If the air-cooled DX in-rack cooling system is changed to water-cooled DX in-rack cooling system, the PUE will drop to 1.49 enen more. The PUE will be 1.49 if the water-cooled DX in-rack cooling system can be incorporate with air-side free cooling design. Finally, the PUE will be 1.44 if all the above mentioned energy-saving measures are adopted. The in-rack cooling system for high-density computer racks is not only highly enegy-saving but also highly space-saving. The in-rack cooling system for high-density computer racks will reduce about 27% of space required by conventional open type cooling system, which does not need Hot-Aisle/Cold-Aisle layout and under floor for supplying the cooled-air flow.