Internet data centers experience continuous annual cooling load compared to common buildings that experience seasonal cooling and heating loads. This study experimentally shows the effect of summer and winter seasonal optimum refrigerant charge amounts on the performance of the IDC cooling system. A methodology for determining the annual optimal refrigerant charge of the IDC cooling system using an integrated COP (ICOP) is experimentally studied at a standard indoor temperature rating of 26.7 °C, outdoor annual temperature range of −2 °C ∼ 35 °C, and varying refrigerant charge amounts. The optimum charges of 6.5 kg and 11.1 kg were found for the summer and winter conditions respectively, while the annual optimum charge using ICOP was 9.7 kg. The annual optimum refrigerant charge of the IDC cooling system using ICOP method showed 13.3% and 33.3% improvement in COP over that of the optimum charge for summer and winter conditions respectively. Alternative methods that use an outdoor temperature that yields the same COP of the IDC cooling system at the optimum summer and winter refrigerant charge amounts, and the average of the optimum summer and winter refrigerant charge amounts are also proposed to determine the annual optimum charge of the IDC cooling system.

与承受季节性制冷和制热负荷的普通建筑相比，互联网数据中心承受着持续的年度制冷负荷。本研究通过实验展示了夏季和冬季季节性最佳制冷剂充注量对 IDC 冷却系统性能的影响。在 26.7 °C 的标准室内温度额定值、-2 °C ∼ 35 °C 的室外年温度范围以及不同的制冷剂充注量。夏季和冬季条件下的最佳装药量分别为 6.5 公斤和 11.1 公斤，而使用 ICOP 的年度最佳装药量为 9.7 公斤。采用 ICOP 方法的 IDC 冷却系统的年度最佳制冷剂充注量分别为 13.3% 和 33。与夏季和冬季条件下的最佳充电相比，COP 分别提高了 3%。还提出了使用室外温度的替代方法，该方法在最佳夏季和冬季制冷剂充注量下产生相同的 IDC 冷却系统 COP，以及最佳夏季和冬季制冷剂充注量的平均值，以确定制冷剂的年度最佳充注量。 IDC 冷却系统。