In the total global carbon emissions, the contribution of information and communication technology equipment will reach 14% by 2040, accounting for more than half of the carbon emissions of transportation. The energy consumption of data centers accounts for a large part of it.In the environment of energy conservation and emission reduction in the whole society, manufacturers and users pay more and more attention to the energy conservation and emission reduction of data centers.
Figure 1 Climate Warming and Ecological Catastrophe in 2100
Is it a bit shocking to see Figure 1?While mankind enjoys the convenient life brought by industrialization, it also brings a heavy burden and serious environmental pollution to the earth. The excessive emission of carbon dioxide has led to global warming.Due to the rising temperature, the area of Arctic glaciers is decreasing year by year. It is predicted that by 2100, there will be only a small area in the middle.At that time, the Arctic glaciers will almost disappear, and the precious polar bears will have nowhere to live.The sea level will rise by 2.2M, some islands and coastal cities will be submerged, and the land on which our human beings depend will become smaller.The nearby Beidaihe Beach and the Maldives, thousands of miles away, may only be preserved in photos.Climate change also has a significant impact on the global natural ecosystem. In addition to temperature rise, extreme weather events also occur frequently, which brings severe challenges to human survival and development.
Figure 2 Trends in world carbon dioxide emissions
Figure 2 shows the trend of carbon dioxide emissions.In the past 150 years, with the process of industrialization, global carbon dioxide emissions have increased dramatically.From 1950 to 2015, the global carbon dioxide emissions increased rapidly, which is also a stage of rapid development of China’s economic construction.By 2015, China’s GDP had exceeded 14% of the total world GDP,What percentage of carbon dioxide emissions does 14% of GDP correspond to?As shown in the figure,The proportion of carbon dioxide emissions in China has accounted for 24% of the world,The comparison between 14% and 24% data is obviously out of proportion. Although there are elements of economic structure, it also shows that China has a heavy task of energy conservation and emission reduction. We have a long way to go, which requires our joint efforts to protect the environment on which we and future generations depend.
In the face of global warming, the United Nations has also held climate change conferences many times to discuss strategies to curb warming.At the 11th United Nations Climate Conference and the 21st Conference of the Parties, China put forward its goal of independent contribution.The achievement of national goals cannot be separated from the contribution of each enterprise.When it comes to supporting the national energy conservation and emission reduction goals and reducing carbon emissions, we usually believe that high pollution and high energy consumption industries such as petroleum, chemical industry and steel smelting are the main “culprits” of carbon emissions.Recently, researchers from McMaster University in Canada released a new study that overturned the public’s perception.Researchers believe that,Information and communication technology products such as smart phones are also one of the drivers of global warming.In the total global carbon emissions,The “relative contribution” of ICT equipment will increase from 1% in 2007 to 3.5% in 2020, and will eventually reach 14% in 2040, accounting for more than half of transportation carbon emissions.The data center supporting information and communication technologies such as smart phones has become a major energy consumer.The construction and operation of the data center has generated a large number of greenhouse gas emissions, which has brought enormous challenges to resources and the environment.
Talking about energy saving and consumption reduction of data center,The Ministry of Industry and Information Technology, the State Administration of Organs Affairs and the National Energy Administration jointly issued the Guiding Opinions on Strengthening the Construction of Green Data Centers,It is proposed that by 2022, the PUE value of new large and super large data centers in China should be below 1.4, as shown in Figure 3.
To achieve this goal, you need to first understand the proportion of energy consumption in PUE in the data center.Figure 4 shows the typical energy consumption distribution of the traditional data center machine room with PUE value=2,From the figure, we can not only visually observe the statistical distribution of power consumption of various electrical equipment in the data center machine room.In addition, it can also clearly indicate where its maximum energy saving potential lies in order to minimize the total energy consumption of the data center.The power consumption of IT equipment accounts for 50%, and the energy consumption of air-conditioning compressor refrigeration system ranks second.To reduce the PUE value, it is necessary to reduce the power consumption of auxiliary equipment such as refrigeration as much as possible.
Figure 4 Typical energy consumption distribution diagram of traditional data center machine room with PUE=2
In view of the current development trend, Glacier Coolant Group has developed Glacier modified fluorinated liquid products, providing efficient and safe solutions for data centers, heating elements, electronic chips, etc. that need efficient heat dissipation.Glacier modified fluoride liquid is a highly stable perfluorinated liquid substance, which is colorless, tasteless, non-toxic, safe, insoluble in water, good thermal stability, and environmentally friendly.
Glacier modified fluoride liquid has a very moderate boiling point (about 50 ℃),High latent heat of vaporization（121.7 kJ/(kg·K)，When immersed phase change liquid cooling is applied to data center server,Use the heat of evaporation tropics in the process of work,No air conditioning is required,The power consumption of the computer room is greatly reduced,Power Usage Effectiveness (PUE) is below 1.1,More than 85% energy saving compared with traditional air conditioning.Glacier modified fluoride liquid has excellent electrical insulation performance, with a dielectric strength of 55 kV, and will not cause damage to precision electronic instruments and equipment.At the same time, it has ideal chemical inertness, no ignition point, flash point, no combustion, no explosion, and good use safety.Glacier modified fluoride liquid also has excellent thermal conductivity, good fluidity and system compatibility. The ozone depletion potential (ODP) is 0, and the global warming potential (GWP) is 7. It is environmentally friendly, does not damage the ozone layer, and has wide applicability.
The typical schematic diagram of glacier modified fluoride liquid applied to the submerged liquid cooling system of the data center is shown in Figure 7.The server can be placed in a sealed cooling box with high density, and the main heat dissipation components of the server can be immersed in the glacier modified fluoride liquid. When the server is running, the heat dissipation parts generate a lot of heat to heat the modified fluoride coolant;As the boiling point of the coolant is low, it will immediately reach boiling, so that the coolant will be converted from liquid to gas, and the heat will be taken away by evaporation to achieve the effect of heat dissipation.The steam of the coolant condenses on the upper condenser into liquid and returns to the immersion liquid to realize recycling.
Glacier modified fluoride liquid directly contacts with various parts of the server, with fast heat transfer speed and energy saving of more than 85%;Simple equipment; It can realize high-density integration of servers, saving more than 80% of space; Both coolant and cooling water circulate in the system, so the loss of coolant and water is small and the operation cost is low.