What paved the way for a data center to save energy

However, in the data center of the growing scale, data storage repeatedly climbing the back of the peak, internal IT equipment, thermal management system of the operation of energy consumption is not to be underestimated. Johnson Controls building facilities Benefit Business China Strategic project director Ganweilin told reporters, data center belongs to energy-intensive industries, electricity consumption is relatively large. Data show that in 2011, China's data center total power consumption reached 70 Billion-kilowatt, accounting for the entire social electricity consumption of 1.5%, the equivalent of the 2011 Tianjin electricity consumption. The power consumption of data centers is staggering.

The enormous energy consumption has increased the user's energy expenditure, also lets the enterprise carry on the high energy dissipation "the baggage". Many data center users will focus on energy consumption--it equipment, air-conditioning systems, hope to use high-tech means to improve energy efficiency, build green, Low-carbon, environmental protection of the data center.

This energy-saving demand in the IT sector, the air conditioning industry has been a positive response. At present, with Johnson control as the representative of some HVAC companies, try to reduce the energy consumption of the data center by frequency conversion technology and intelligent control technology, paving the way of energy saving of air-conditioning system.

Frequency conversion technology, energy saving 30%

In the survey, the reporter learned that in the operation of the data center, IT equipment operating energy consumption accounted for the entire data center energy consumption of 50%; the air-conditioning system followed, and its energy consumption accounted for about 31% of the total energy consumption. "Data center air-conditioning systems include chiller units and precision air-conditioning." The chiller has always been the main air conditioning system of large public buildings, its energy consumption accounted for the entire air-conditioning system http://www.aliyun.com/zixun/aggregation/30044.html "> Half, about 60% 70%." Therefore, the water chiller is the most important part of the whole air-conditioning system. "Ganweilin said.

At present, it is one of the effective measures to optimize operation and save energy by introducing frequency conversion technology into chiller. Experts pointed out that the High-efficiency DC inverter centrifugal unit compared with the ordinary centrifugal unit, more than 40% power, the efficiency of the unit increased by more than 65%. If the existing 15% of large building air-conditioning mainframe in China is transformed into a high-efficiency inverter centrifugal unit, it can achieve an annual energy saving of about 800 million degrees.

Ganweilin is very sympathetic to this view, he said, Johnson Control developed York air-conditioning frequency conversion technology, its advantages in energy conservation is very obvious. Johnson Controls early in 1979 to the York inverter technology into the chiller, and in 2005 because of the U.S. Environmental Protection Department of the EPA issued the "Annual Environmental Protection Award", the air conditioning industry was the first to receive the award of the manufacturer. Johnson-controlled York frequency Conversion drive technology, can make the integrated part of the load efficiency of the unit increased. In hot backup deployment mode, the power consumption of the host will not reach 100% even if the entire system is running at full capacity. For equipment alone, the power consumption is about 75%. With two devices, the power consumption is about 60%.

In addition to energy saving, another function of frequency conversion is soft start, that is, small start-up current. The normal frequency of the starting current is very large, usually 23 times times the load current. If converted to inverter, the starting current will not be higher than the full load current. The frequency conversion technology is introduced into the data center, the start-up current is small, the impact of the computer is smaller, and the power generated by the standby machine is reduced, and the impact on the host is smaller.

At present, Dr. Peng Beijing Hotel Bridge Data Center, China Telecom Cloud computing Inner Mongolia Information Park Data Center and Shanghai Agricultural Business Processing Center, such as a number of new projects using York air-conditioning frequency conversion technology, free cooling, computer room group control and other technologies, is expected to save about 30%.

(Responsible editor: Lu Guang)