| Title |
Energy Performance of Air-side Economizer System for Data Center Considering Supply Temperature and Design Airflow Rate of CRAH(Computer Room Air Handler) |
| Authors |
Kim, Ji-Hye ; Aum, Tae-Yun ; Jeong, Cha-Su |
| DOI |
https://doi.org/10.5659/JAIK_SC.2019.35.11.181 |
| Keywords |
Air-side Economizer System; Data Center; Mechanical Load Component; Free Cooling Hours |
| Abstract |
The purpose of this study is to evaluate the cooling energy saving effects of CRAH supply air temperature(SAT) and design flow rate
changes when applying air-side economizer in the data center. MLC(Mechanical Load Component), which is cooling performance indicator of
data center, was used to assess the effectiveness of cooling energy savings. It was computed with energy simulation (DesignBuilder) to
evaluate the cooling energy performance of 8 different alternatives in a data center. The MLC was 0.31~0.32 regardless of CRAH supply
temperature without air-side economizer, and 0.15 to 0.19 value with air-side economizer. That is, cooling energy can be reduced by
approximately 40~55% when applying economizer. As the CRAH SAT and design flow rate changed, the MLC values were 0.16 to 0.18 and
0.15 to 0.19, respectively. |