Local high heat treatment solution for data centers

Local high heat treatment solution for data centers

Although the data center has a sound air-conditioning system that maintains constant temperature and humidity all the year round, the internal temperature distribution is not balanced enough. It is close to the air outlet location, and the temperature is close to the constant temperature of the air conditioner. The temperature a little farther away from the air conditioner is different from the temperature controlled by the actual air conditioner, especially in some poorly ventilated places, these dead corners are often high temperatures, which are easy to ignore, resulting in problems caused by high temperatures. The current data center is deployed with an access and ventilation channel. The Cabinet is preceded by an inbound air duct and the back is an outbound air duct, so that heat can be taken away in time. However, because the heating power of different devices is different, if a high-power device is installed in some areas, the local area of the data center may be overheated, threatening the safe operation of the data center, it may even cause serious problems such as equipment downtime and hardware damage due to overheating. Therefore, how to control the temperature in the data center room to a certain extent and eliminate some hot spots is a university question, this guarantees the long-term stable operation of the data center. Next we will discuss some solutions for local high heat treatment in the data center.

First, you can reduce the operating temperature of the air conditioner. by reducing the overall operating temperature of the air conditioner, you can reduce the temperature of the local high heat area and eliminate the high heat area. This solution is the simplest, but the most expensive. Reducing the ambient temperature of the data center also increases the energy consumption of the air conditioner, resulting in an increase in the PUE value of the data center. In 2013, the total power consumption of the data center reached 91 billion KW/h or above, and the power consumption increased rapidly and cannot be ignored. Reducing the operating temperature of the data center is bound to further increase the power consumption. In the 12th Five-Year Plan, China has adopted energy conservation and emission reduction as a constraint indicator for national economic and social development. It has become an industry consensus to reduce energy consumption by increasing the operating temperature of data centers, therefore, the solution to reduce the operating temperature of air conditioners is simple and effective, but it is not a good solution.

Secondly, smart Air Supply floors can be used. The Intelligent Air Supply floor is an auxiliary equipment for air conditioning air supply system. It is equipped with an axial fan to adjust the air volume of the floor. By adjusting the floor air volume, the equipment load in each area of the data center is uneven, so that the temperature distribution in each area is even, and local overheating is eliminated, it greatly improves the air conditioning utilization of the data center. Generally, the intelligent air supply floor can reduce the exhaust temperature of the Cabinet, and reduce the exhaust temperature of the cabinet by 1.2 degrees on average. The maximum temperature can be reduced by 2.5 degrees. By dynamically adjusting the air supply floor, the temperature in each area can be maintained in a balanced manner, at the same time, the cold air can be fully utilized to reduce the temperature of the equipment. By adjusting the air supply floor, you can also change the wind direction, which is the same as the heat generated by the Cabinet, so that the heat can be smoothly taken away, the thermal effect is not very good. The smart Air Supply floor adjusts the air intake volume to solve the uneven heating and cooling caused by different equipment loads in different regions of the data center, so that the temperature distribution in different regions of the data center is even, and the temperature dead zone is solved, eliminate local overheating, so as to increase the air conditioning return temperature value to a certain extent, that is, the ambient temperature of the data center, reduce the energy consumption of the air conditioning system, and save energy. Some smart Air Supply floors can also adjust the opening rate of perforated floors, measure the air volume, supply according to the demand of equipment, and adjust the air volume by changing the opening rate.

Third, you can adjust the thermal direction of the device. The heat production parts of the equipment in the data center are different in different directions. Some of them are not in parallel with the inlet and outlet. In this way, the heat dissipation effect cannot be achieved and local hot spots are easily generated. Therefore, through routine inspection, we can promptly discover these high heat areas, and draw a heat map (heat distribution chart) for the heat distribution of these areas to see if the heat source of the equipment is parallel to the direction of inbound and outbound exhaust. If it is not parallel enough, you can add some bezel around it to change the wind direction, so as to better utilize the ventilation system of the data center. Adding a baffle plate must have an analysis reason and cannot be added at will. Otherwise, it will increase the degree of local Temperature Imbalance. It should be analyzed based on the surrounding temperature environment, design reasonable and suitable baffle plate and install it in the most appropriate position. If it is difficult to install the baffle plate, you can also check whether the heat source of the equipment can be adjusted. For example, you can adjust the layout of the equipment and place the equipment with high heat value in a well ventilated location, you can also change the location of the device to reduce local high hotspots.

Fourth, you can add a cooling device in a local hot spot. Entering the data center room will find that in addition to the ventilation channel before and after the cabinet, some removable air conditioning devices are often placed on both sides of the Cabinet. These air conditioning devices can adjust the local temperature. Of course, these air conditioners are large in size and difficult to move. They are difficult to blow to the middle of the Cabinet. If the local hot spots are too ventilated and the temperature is too dangerous, you can add a fan in these areas to accelerate the air flow in the local area, thus reducing the problem. The placement of the fan is also exquisite, and it cannot be placed at will. It should be placed in the heat generation direction of the equipment. Through the wind power of the fan, partial heat can be blown out of the air outlet, in this way, local hot spots can be effectively reduced.

Finally, the data center space can be isolated from each other. Blocks gaps between adjacent cabinets in the same column to effectively isolate hot and cold channels. Block the space between the bottom of the Cabinet and the electrostatic floor to prevent the flow of hot air. Add blind boards to idle U locations without blind boards to prevent air flow disorder. In this way, the data center is isolated into independent smaller areas, and each relatively closed area has access and ventilation channels. These small microcirculation can make the temperature distribution more even and completely eliminate local hot spots, the smaller the isolated area, the less prone to local high hotspots, better ventilation. This method is also applied in some excellent data center rooms. For example, in the 21 vianet data center room, isolation doors are installed next to each group of cabinets, and each isolation door is a microcirculation system, the temperature of each microsystem is balanced, so that local hot spots do not appear.

We should take the initiative to study the internal airflow of the data center and control the airflow to eliminate local high hotspots. Which scheme is used? It is also analyzed based on the actual situation of its own data center. By deploying these solutions, this guarantees the construction of a secure, stable, efficient, and energy-saving data center.