近日，两家日本龙头企业声称已开发出一种使用新的HFO制冷剂的数据中心冷却系统，该系统可将功耗降低一半。
Two leading Japanese corporations claim to have developed a data centre cooling system, using a new HFO refrigerant, that could cut power consumption in half.
NEC（跨国信息技术和电子公司）和NTT Communications（日本最大的电信公司）已开发出使用低压制冷剂R1224yd的冷却系统。
NEC, the multinational information technology and electronics company, and NTT Communications, Japan’s largest telecommunications company, have developed the cooling system using the low pressure refrigerant R1224yd.
据称这是第一次将低压制冷剂用于空气冷却。
This is claimed to be the first time that a low pressure refrigerant has been used for air cooling.
R1224yd实际上是一种HCFO，由日本制造商AGC旭硝子集团公司开发，是一种A1类不可燃制冷剂。它主要设计用于离心式制冷机，双循环交换机和余热回收热泵。
Actually an HCFO, R1224yd was developed by Japanese manufacturer AGC Asahi Glass as an A1 non-flammable refrigerant. It was designed mainly for use in centrifugal chillers, binary cycle generators and waste heat recovery heat pumps.
NTT数据中心对该系统进行的联合实验表明，该制冷系统易于改装，与传统的水冷系统相比，制冷的能耗可降低一半。
Said to be easily retrofitted, joint experiments of the system at an NTT data centre are said to have demonstrated that the air conditioning power consumption can be reduced to half compared to conventional water-cooling systems.
There are also said to be plans to utilise the exhaust heat for secondary uses.
相关阅读：
2017年，日本制冷剂制造商AGC旭硝子集团公司（AGC）宣布，其生产的新型低GWP值HCFO制冷剂R1224yd(Z)已经获得了美国ASHRAE学会的认证。
新型R1224yd(Z)是一种A1类不可燃的制冷剂，主要用于离心式冷水机组、双循环发电机和余热回收热泵。
AGC公司于2018年初以Amolea 1224yd作为产品名称进行制冷剂的商业化生产。该公司表示，R1224yd(Z)的性能已经得到了日本和其他地区空调设备制造商的关注，并宣布日本荏源制冷公司已经决定在新一代离心机组中使用该制冷剂。
该制冷剂主要替代HFC-245f，其GWP值低于1，同时还显示出与后者相当或更佳的制冷剂性能和稳定性。对于新设备，AGC公司保证新型制冷剂可以用于现有设备，无需进行大的改变。
