In the past three years, great changes have taken place in the construction of domestic data centers . Data center construction requires rapid intensification, and small data centers are gradually being replaced by very large data centers. Green energy saving and improving the input-output ratio have attracted the attention of customers, but the location of the equipment room lacks overall considerations.
In the past three years in China, data centers have changed rapidly. In the past, there were many small data centers, but now large-scale data centers have a strong growth momentum. The decentralized data centers are developing in a centralized manner, which is also in line with the development of the European market. From the customer level, the input-output ratio is more and more demanding, and the requirements for energy saving and operation and maintenance are getting higher and higher. Therefore, the number of self-built small computer rooms is gradually decreasing and they are turning to purchasing services. Three years ago, few users did this, and now more than 50% of users use purchasing services, and 68% of companies in Europe have adopted purchasing services. This also promotes the development of future computer room development towards large data centers.
However, domestic data centers do not pay enough attention to site selection in overall planning and lack overall consideration. Yao Zheng said, "Doing data centers in China does n’t pay much attention to site selection. It can be said that they are blooming everywhere without comprehensive consideration. Data center construction must consider wind, fire, water, and electricity. This place is not short of water, and cities without water should Less data centers. A typical 1,000-cabinet data center consumes 4,000 tons of water per day, which basically catches up to the residents of a city.
Take Beijing as an example. Beijing is a water scarce place, so you should build fewer data centers. In the overall planning of the data center, the country lacks overall planning and considers water and power consumption balance. If there is a shortage of water, an unused machine room or half of the water and half of the electricity will be built. This requires overall planning.
Data centers need to be more objective in formulating standards. Beijing has made many financial data centers. Financial data centers are particularly strict about reliability. However, data centers are highly dependent on water and electricity, and data center circuits are easy to make. Dual power supply. In the data center of Beijing, one from the State Grid and the other from the North China Power Grid, but the waterway cannot come from two water sources, and Beijing is a water company. Water and electricity are large investment households on the one hand and two major indicators of data center reliability on the other. If the water stops and the air-conditioning cools, the entire data center will have to stop.
This part of air conditioning is mainly divided into air cooling and water cooling. Water cooling does not exclude air cooling. Water cooling is definitely better in the south, and there is no shortage of water in the south. If you go to the north, it will be cheaper to use air cooling. Integrating air cooling into natural cooling and using a heat exchanger to cool it, which consumes neither water nor electricity, so it all depends on the geographical location of the data center.
Green energy saving is the hottest topic in data center energy saving in recent years. The improvement of energy-saving utilization efficiency of air-conditioning management and control is far higher than that of UPS or other monitoring effects. "How big is the water flow of the air conditioner, how high the supply air temperature is, how high the return air temperature is, and the precise air supply and energy saving are all based on the air conditioner. The air conditioner itself consumes electricity. The difference between good and bad energy conservation is really big.
However, little attention has been paid to the energy saving effects of air conditioning monitoring. The air-conditioning design is mainly to clarify the environmental requirements. The environmental requirements are different in the north and the south, and the outdoor temperature is different everywhere. Therefore, the actual results of the design are different. Unlike power distribution, which is the same in the North and South regions, it has little to do with the environment, so air conditioning is difficult here. According to our calculations, energy conservation in network changes, monitoring, high-efficiency managers, UPS, etc. is at most The effect of 5% -6% is good. However, the entire data center consumes more than 100,000 power, and air conditioning varies widely. A thousand cabinets cost about 4 million a year, and 10,000 cabinets cost 40 million electricity. Generally good air conditioners, such as natural cooling of wind energy, are in the north. In regions, the natural cooling of wind energy can save 30% -40% of the electricity bill for one year. If the design is not reasonable, the natural cooling time will be short.
Visualize and control software for personalized energy efficiency management. "For example, the average room temperature is designed to be 30 degrees, the peak value changes in the morning and evening, and the water flow also changes. These are controlled by a set of on-site air-conditioning energy efficiency managers. The energy efficiency manager we make at CCB is completely based on the server's power consumption and room temperature conditions. Through software calculation and simulation, a regular curve is formed after one year of operation, and the environment also has a regular curve. According to these curves, the temperature, humidity, water flow, and the number of outdoor central air-conditioning compressors are controlled to achieve green energy-saving effects.