With the construction of a new generation of data centers, infrastructure, such as networks, servers, and storage, are further concentrated, which puts new demands on the basic environment of the data center. Take the blade server application as an example. It has high computational intensive, easy to deploy, good management, green and energy saving features, and is a good choice for data center construction. However, for existing data centers, insufficient power and cooling are not required, which plagues the promotion and application of blade servers.
The effect of heat dissipation in the equipment room is closely related to cabinet selection and cabinet placement. The cabinet is easily overlooked. At present, liquid-cooled (or water-cooled) cabinets are the most discussed topic, and a more accurate description is a cabinet with liquid-cooled doors. The deployment of high-density servers is inevitable in the development of data centers. The heat dissipation problem caused by this should be highly valued. A small cabinet contains a huge mystery. The new generation of data centers is today's hotspot, whether it is resource integration, virtualization, or green energy conservation, automation and security management, are the topics of the industry.
Existing data center racks or cabinets have a power configuration of 10A (amperes) and can be deployed with 15 to 16 1U rack servers at full capacity. For the poor data center, the power supply is only 6.8A, for the blade server. A fully equipped blade server requires about 10A of power.
According to the existing capacity calculation of the data center, 10A power supply obviously cannot meet the needs of more blade server deployment, and the contradiction of power shortage is very prominent. How to solve the problem of insufficient power supply, the most easy to think of is to start from the expansion. In fact, at the beginning of the data center or building construction, there is a certain measure for the power capacity. Nowadays, increasing the power capacity requires the expansion of the power sector and involves the transformation of the corresponding lines, switches and other equipment. There are many factors involved and many factors are constrained.
Reasonable adjustments to existing power usage are another solution to the lack of power. According to Pan Jiachi, general manager of HP's global IT services department, they used a set of solutions called Adaptive Data Availability Management (ADAM) to monitor the data centers of some existing enterprises. As a result, it is found that about 10% of the power consumption is used for lighting, and the power consumption for IT equipment is only about 30%, and the rest of the power consumption is in refrigeration, that is, the cost of operation management has greatly exceeded The actual cost of use of the equipment. Through reasonable layout and scientific thermal model design, the power consumption of operation and maintenance equipment can be greatly reduced, and the contradiction of power shortage can be effectively alleviated.
The cost of air conditioning and refrigeration from the cabinet is high, which is related to the design of the rack/cabinet and the heat dissipation model. It is understood that the air conditioning temperature of many computer rooms is very low. In summer, people need to wear thick clothes in the computer room. The reason is that the equipment room is set to the air conditioning temperature according to the equipment with the highest heat dissipation requirement. This extensive management will inevitably lead to a reduction in energy efficiency.
The effect of heat dissipation in the equipment room is closely related to cabinet selection and cabinet placement. The cabinet is easily overlooked. In an interview, the administrator of a power room said that the company's IT budget is limited, it is difficult to convince the company's leaders to pay more than 10,000 yuan to buy the cabinet. In some leaders' eyes, there is no furniture in the cabinet and family life. How much difference can save the province. In order to pursue an aesthetic style, many cabinets use glass doors, resulting in poor heat dissipation of the equipment and frequent failures. Many people regard the cabinet as a cabinet for IT equipment. The cabinet is a cabinet, but not only that. For the computer itself, the cabinet also has an important auxiliary function with the UPS power supply. A good cabinet means that the computer can run in a good environment. Therefore, the role played by the cabinet is equally important. The cabinet systematically solves the problems of high-density heat dissipation in computer applications, a large number of cable attachment and management, large-capacity power distribution, and full compatibility with rack-mount devices of different manufacturers, so that the data center can operate in a highly stable environment. . At present, the cabinet has become an indispensable item in the computer industry. Various types of cabinets can be seen in all major computer rooms. With the continuous breakthrough of the computer industry, the functions of the cabinets are also growing. Cabinets are generally used in network wiring rooms, floor wiring rooms, central computer rooms, data room, control center, monitoring room, monitoring center, etc. The cabinet is generally made of cold-rolled steel or alloy for storing computers and related control equipment. It can provide protection for storage equipment, shield electromagnetic interference, and arrange equipment in an orderly and neat manner to facilitate maintenance of equipment in the future. Cabinets are generally divided into server cabinets, network cabinets, and console cabinets. Common cabinet colors are white, black, and gray. (There are many types, such as orange, fine sand, etc.); cabinets are divided according to materials, cabinets with aluminum profiles, cold-rolled steel cabinets, hot-rolled steel cabinets; according to the processing technology, there are nine fold profiles Cabinets and 16-fold cabinets.
The type of sheet, the coating material, and the processing technology determine the stability of the cabinet. Generally, its length specification is 600,800mm, width specification is 600,800,1000mm, height specification is 42U, 36U, 24U. The cabinets used in the early days were mostly made of castings or angle steels connected by screws or rivets or welded into a cabinet frame, and a cover plate (door) made of thin steel plate. This type of cabinet is bulky, cumbersome and has a simple shape and has been eliminated. With the use of transistors and integrated circuits and the miniaturization of various components, the structure of the cabinet has also been developed in the direction of miniaturization and building blocks. The cabinet has evolved from a full-panel structure in the past to a plug-in and plug-in structure with a certain size series. The assembly arrangement of the plug-in box and the plug-in is divided into two types: horizontal arrangement and vertical arrangement. The cabinet materials are generally made of thin steel plates, steel profiles of various cross-section shapes, aluminum profiles and various engineering plastics. In addition to welding and screwing, the frame of the cabinet is also bonded.
According to the bearing capacity, materials and manufacturing process of the components, the cabinet can be divided into two basic structures: profile and thin plate. Profile structure cabinet: There are two types of steel profile cabinets and aluminum profile cabinets. The steel profile cabinet consists of a profiled seamless steel pipe. This cabinet is very rigid and strong enough for heavy equipment. The aluminum profile cabinet consisting of aluminum alloy profiles has a certain rigidity and strength and is suitable for general or light equipment. The cabinet is light in weight, small in processing volume, and beautiful in appearance, and is widely used.
Thin-plate structure cabinet: The whole-plate cabinet, whose side plates are bent and formed by a single piece of steel plate. This cabinet has good stiffness and strength and is suitable for heavy or general equipment. However, because the side panels are not removable, assembly and maintenance are inconvenient. The structure of the curved column column cabinet is similar to that of the profile cabinet, and the column is bent from a steel plate. This cabinet has a certain rigidity and strength and is suitable for general equipment. The cabinet is also equipped with cabinet accessories as needed. Its main accessories are fixed or retractable guide rails, locking devices, hinges, wire troughs, cable trays and shielded comb reeds. Has good technical performance. The structure of the cabinet shall be subjected to the necessary physical design and chemical design according to the electrical and mechanical properties of the equipment and the requirements of the use environment to ensure the structure of the cabinet has good rigidity and strength, and good electromagnetic isolation, grounding, noise isolation, ventilation and heat dissipation. Performance.
In addition, the cabinet should be resistant to vibration, shock, corrosion, dust, water, radiation, etc., in order to ensure stable and reliable operation of the equipment. It should have good usability and safety protection facilities for easy operation, installation and maintenance, and ensure operator safety.
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