| Title |
Development of Energy Efficiency Standards and Performance Evaluation Framework for Data Centers in Korea |
| DOI |
https://doi.org/10.6110/KJACR.2026.38.6.323 |
| Keywords |
데이터센터 ; 에너지 효율 기준 ; 에너지정책 ; 설비인프라 ; 기계부하요소 ; 전력사용효율 Data center ; Energy efficiency standards ; Energy policy ; Facility infrastructure ; MLC ; PUE |
| Abstract |
This study examines the thermal stratification characteristics of a water-based thermal energy storage (TES) tank under various charging directions and flow rate conditions. A lab-scale TES system was designed using Froude similarity, based on a prototype intended for integration with a 1000RT heat pump system. We conducted experiments and CFD simulations using a 2-D axisymmetric model (Ansys Fluent) to validate thermal behavior and assess stratification performance. Charging tests were performed for both top-to-bottom and bottom-to-top configurations at flow rates of 127 LPM and 215 LPM. The results indicated that top charging effectively maintained a distinct thermocline region, with a Richardson number up to five times higher than that of bottom charging, demonstrating stronger stratification. While increased flow rates accelerated charging, they also weakened stratification due to enhanced momentum effects. The discharging tests confirmed that the outlet temperature remained stable at 43℃ for the designed discharging duration before beginning to decrease. These findings underscore the importance of inlet design and flow control in enhancing TES tank performance and sustaining thermal stratification. |