Many people have seen precision air conditioning , so do you understandthe characteristics of precision air conditioning ?

1. Small latent heat

　　It does not change the temperature in the equipment room, but only changes the moisture content of the air in the equipment room. This part of heat is called latent heat. There is no moisture dissipation equipment in the computer room, and the latent heat mainly comes from staff and outdoor air. Large and medium-sized computer rooms generally adopt the management mode of man-machine separation. The enclosure structure of the computer room is well sealed. The fresh air generally enters the man-machine room after temperature and humidity pretreatment. Therefore, the latent heat of the computer room is relatively small.

Second, the sensible heat

　　Computer equipment such as mainframes and peripherals, servers, switches, optical transceivers, and power support equipment installed in the equipment room, such as UPS power supplies , will radiate heat into the equipment room through heat transfer, convection, and radiation. The rise of is sensible heat. The heat dissipation of a server cabinet ranges from several kilowatts to more than ten kilowatts per hour. If a blade server is installed, the heat dissipation will be higher. The heat dissipation of large and medium-sized computer room equipment is about 400W / m2, and the data center with a higher installed density may reach more than 600W / m2. The sensible heat ratio in the machine room can be as high as 95%.

3. Uninterrupted operation and year-round refrigeration

　　The heat dissipation of the equipment in the equipment room belongs to a steady-state heat source, which runs continuously throughout the year. This requires an uninterrupted air-conditioning guarantee system, which also has high requirements in the power supply of air-conditioning equipment. And for the air conditioning system to protect important computer equipment, there should also be a generator set as a backup power supply. The long-term steady-state heat source causes the need for cooling even in the winter machine room, especially in the southern region. In the northern region, if refrigeration is still needed in winter, when selecting an air-conditioning unit, the condensing pressure of the unit and other related issues need to be considered. In addition, the outdoor cold air intake ratio can be increased to achieve the purpose of energy saving.

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