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포러스 (Porous) 경계조건을 이용한 데이터센터의 기류 및 온도분포 해석 방법에 대한 연구
장현재(Chang Hyun-Jae),정응호(Jung Yong-Ho),서장후(Seo Jang-Hoo) 한국건축친환경설비학회 2013 한국건축친환경설비학회 논문집 Vol.7 No.4
With the development of IT industries in recent years, the needs for data centers has been increased together. Data centers in which so many server computers are arranged usually need a large cooling energy, and its energy conservation has been issued. The amount of cooling energy needed is concerned with the distribution of air flow and that of temperature in computer rooms. There are many studies on those conducted by CFD (computational fluid dynamics) simulation, and those have been conducted only in the space for computer rooms but without plenums for the supply and return. In those studies, the boundary conditions of airflow used to be given uniformly throughout the whole region of velocity outlet in the cold aisle. However, there may be a different distribution of air velocity at the velocity outlets constructed with perforated tiles, and the pressure drop through it needs to be applied to the simulation by utilizing porous boundary condition. In this study, the distributions of airflow and temperature formed in the space without plenums were compared with those formed in the space with plenums by CFD simulation. Indices of SHI, RHI, and RTI in each case were investigated. As a results, there were quite large differences between them, and conducting CFD simulations to the space including plenums was recommended as a simulation method.
냉복도 밀폐시스템의 적용에 의한 데이터센터 서버실의 냉방에너지 절감 효과 분석
장현재(Chang Hyun-Jae),정용호(Jung Yong-Ho),서장후(Seo Jang-Hoo) 한국건축친환경설비학회 2012 한국건축친환경설비학회 논문집 Vol.6 No.3
In order to keep the server room temperature condition, energy consumption has been rapidly increased as the increasing internal heat gain of server room in data center. And the cooling units for server systems are fully operated to satisfy the indoor temperature condition, it results in the excessive energy consumption. There are many wastes of cooling energy which is caused by the structural problems in data center server room. For example, a leakage by the electric cable hole, mixing or recirculation of hot air from the hot aisle to the cold aisle, short circulation of the CRAC(Computer Room Air Conditioning), and others. So there are many strategies to reduce the waste of cooling energy in data center. In this study, cold aisle containment system was proposed among the various strategies to reduce the waste energy by recirculation air from the hot aisle. To verify the effectiveness of the cold aisle containment system, test bed which is same with exist server room was set up in IDC(Internet Data Center) building. And comparative experiments, conventional open type cooling system and cold aisle containment sysetm, were carried out in actual conditions. As the result, the range of inlet temperature of server system was 20~25℃ in exist cooling system and the range of inlet temperature dropped below 20℃ by cold aisle containment system. After all, was possible by the cold aisle containment system and cold aisle containment system was proved to be the solution for energy saving cooling system.
장현재(Chang, Hyun-Jae),정용호(Jung, Yong-Ho),서장후(Seo, Jang-Hoo) 한국태양에너지학회 2012 한국태양에너지학회 학술대회논문집 Vol.2012 No.11
In this study, cold aisle containment system was proposed among the various strategies to reduce the waste energy by recirculation air from the hot aisle. To verify the effectiveness of the cold aisle containment system, test bed which is same with exist server room was set up in IDC(Internet Data Center) building. And comparative experiments, conventional open type cooling system and cold aisle containment sysetm, were carried out in actual conditions. As the result, the range of inlet temperature of server system was 20~25℃ in exist cooling system and the range of inlet temperature dropped below 20℃ by cold aisle containment system. After all, was possible by the cold aisle containment system and cold aisle containment system was proved to be the solution for energy saving cooling system.