Why should the computer room design hot and cold aisles?
Because the computer room uses the hot aisle and cold aisle to change the previous practice of placing the cabinets in the same direction in the data center, the "face-to-face, back-to-back" cabinet placement method is adopted, which is in line with the server and other IT equipment. The design of the rear exhaust air divides the cold and hot air into different zones to prevent the warm/hot air discharged from the front row cabinets from being mixed with the cold air into the rear row cabinets, which leads to the problem of reduced cooling effect and improves the cooling efficiency.
Design principles of hot and cold aisles in computer rooms
The main service equipment of the information center includes storage systems, host systems, high-performance rack servers and blade servers. The design principle is to increase the space density of the machine to save the room space and reduce the relative energy consumption; when deploying multiple blade servers in one cabinet, the contradiction of insufficient power is very prominent, and the problem of heat dissipation is also prominent.
(1) Site layout
The problem of load-bearing is solved by adding a spreader under the cabinet floor, which makes the problem of insufficient space height more prominent. It is necessary to better organize the airflow so as not to hinder the airflow of the cold aisle. For this reason, the arrangement of the cabinets is very critical. In the planning and design, the airflow organization method of downward air supply and upper air exhaust is adopted, and the wiring of strong current and weak current adopts the method of upper wiring, which brings convenience for future maintenance and greatly reduces the resistance of cold aisle. It is possible to reduce the height of the floor. Through the above measures, the installation height of the floor is controlled at 35cm.
High place: The ventilation and ventilation ducts and fresh air ducts of the multi-layer heat engine are arranged with the hotter return air passages. Due to the operation of the machine room in the larger hot return air space during the construction, and the operation is good, and the length of the feng shui duct is continuous, The problem of return air is also difficult to guarantee. The upper layer of the highest layer needs to be specially treated as a hot return air duct to solve this problem.
The arrangement of the cabinets in the equipment room is considered from the perspective of aesthetics and energy saving. In the planning and design, the common multi-row cabinet arrangement is not adopted, but the long arrangement of double-row cabinets facing each other is adopted. This arrangement does not reduce the In the case of dense arrangement of machines and cabinets, the appearance is very good. Whether it is seen from the monitoring room or inside the machine room, the permeability is very good, which also provides convenience for reducing the resistance on the main channel of cold and hot air.
(2) UPS power supply
From the characteristics of the data center, it can be seen that although the data center is constructed as a whole, the increase of equipment in the data center is gradual, so the power supply capacity should also be improved in stages. In planning and design, make the UPS room relatively independent, and leave room for expansion of UPS equipment. The cabinets in the data center computer room are in place at one time. The capacity of the cables between the power distribution column head cabinet in the data center computer room and the power output distribution cabinet in the UPS power room is designed according to the power supply configuration of the "full load" capacity of all the cabinets. The power supply capacity is not enough. The power supply capacity of UPS increases in stages according to the amount of equipment in the computer room, and there is room for expansion.
UPS power supply system can use 2N or 2 (N+l) mode to ensure power supply reliability and scalability. Through the on-demand stage expansion of UPS power supply, the phenomenon of large horse-drawn carts can be avoided, and the investment of UPS power supply equipment is reduced, and the purpose of energy saving and emission reduction is also achieved.
(3) Computer room air conditioner
The cooling of the computer room is one of the basic conditions to ensure the safe and reliable operation of the data center. Usually, precision air conditioners are installed in the computer room. For a data center, when the equipment in the computer room is "fully loaded", there will be a large amount of heat, but for a newly built data center, due to the increase in equipment, it will take a long time, and during the year The load of air conditioners in different seasons is also changing. It is necessary to adapt to the development needs of large changes in heat dissipation capacity. In order to achieve the purpose of energy saving and emission reduction, we have selected two air conditioners in the planning and design, and the total capacity of the air conditioners must be To meet the adjustment capacity of the "full load" of the design of the computer room, each air conditioner has two units, which can be operated independently in groups, so that the two air conditioners and four units can be dynamically adjusted automatically according to their thermal capacity, and different numbers of units can be automatically run on demand to meet economical operation. Thus, the energy saving and emission reduction of the operation of the air-conditioning unit is completed.
4) Isolation and closure of hot and cold aisles
The long arrangement of cabinets also provides conditions for low-cost handling of the isolation of hot and cold aisles. The airflow organization in the equipment room completes the isolation of cold and hot aisles, which maximizes energy efficiency and achieves the purpose of energy conservation and emission reduction.
The design of cold and hot aisle isolation in the equipment room is to install tempered glass on the upper part of the cabinet, lengthen the arrangement length of the cabinet, and place the upper return air outlet at a high density. The possibility of direct short-circuiting of the airflow without passing through the cabinet is minimized, and the cold and hot airflows are relatively isolated.
(5) Energy saving and emission reduction
Servers with more and more processing power, data storage devices and network devices with increasing capacity, need to consume more power. The more and more integrated equipment, the more concentrated the heat, which makes the temperature control of the equipment room a big problem.
Only by researching new technologies and new methods to reduce the energy consumption of the computer room, we strive to improve the heat dissipation efficiency of the computer room and reduce the overall energy consumption of the data center computer room through the rational selection of server racks, reasonable heat dissipation planning, and optimization of the design, layout, and use of the computer room. energy consumption in order to achieve the goal of energy saving and emission reduction.