The quality of the computer room lighting will not only affect the work efficiency and physical and mental health of computer operators and software and hardware maintenance personnel, but also affect the reliable operation of the electronic equipment room. Therefore, reasonable selection of lighting control methods, lamp types, layout and some related equipment can not be ignored in the decoration and electrical engineering design of electronic equipment room.
China's computer room lighting design standards
The main indicator of China's computer room lighting design standards is illumination. Illuminance E: When the luminous flux is projected onto the surface of the object, the surface of the object can be illuminated; the illuminance is the surface density of the luminous flux, that is, the ratio of the luminous flux φ incident on the surface of the object to the area S of the surface of the object, ie E=φ/S ( The unit of illumination is lux Lx).
When considering the lighting of the equipment room, the requirements of uniformity of illumination, stability of illumination, color rendering of the light source, glare and shadows must also be mentioned in the schedule. These factors will also not be effective for operators and maintenance personnel. Underestimated impact. Because the division of labor in each functional area in the general central computer room is different, the illumination requirements in the illumination are also different. The average illumination of the equipment room area can be greater than 500Lx from the vertical working surface of the ground plane of 1400mm.
The average illuminance of the equipment room, glare limit standards and corresponding measures, as well as other technical requirements of the equipment room, including layout, area, man-machine environment, hum, electromagnetic interference, etc., are clearly defined in the architectural design standard GB50034-2004. .
1. The average illuminance of the host room can be taken as 300 or 5001x.
2. The average illuminance of the basic work room and the first type of auxiliary room can be taken as 100, 150, 2001x.
3. The second and third types of auxiliary rooms shall be valued according to the current lighting design standards. At the same time, the relationship between the operating environment and the illuminance value of the equipment room is clearly defined, such as the low value of the intermittent operation of the equipment room; the median of the continuously operating equipment room; the high value of the continuously operating equipment room; Median or high value.
Computer room general lighting design
First of all, the layout of the lighting should be considered in consideration of the aesthetics of the equipment room, the importance of the location, and the location of the equipment. From the perspective of the aesthetics of the equipment room, the layout of the lamps should be evenly arranged, that is, maintain a certain distance in the vertical and horizontal directions, and determine according to the area of ​​the equipment room. The direction of the luminaire; from the importance of the position; the luminaire should be determined according to the nature and role of the location to achieve better results; at the same time the location of the equipment needs to also consider factors such as avoiding shadows for easy maintenance.
Secondly, the lighting design of the equipment room should meet the requirements of illumination, uniformity and glare limitation standards. Five lighting criteria should be considered: illumination level, brightness distribution in the field of view, protection from glare, spatial distribution of light, color rendering and color rendering. . These are suitable for both ambient and artificial light, as well as environmental conditions in which the light is combined. Large computer rooms should pay more attention to green lighting, save energy and protect people's physical and mental health.
The choice of equipment materials for the equipment room should be selected from lamps without starter or electronic ballast; lamps with lamp and anti-black light; lamps that can double the air return of air conditioner; lamps with good overall decoration; The luminaires, so-called high-efficiency, should not be lower than 65% (glass or transparent plastic protective cover) according to market products and specifications. The efficiency of the louver luminaire should be more than 60%. It is recommended to use the reflective high-grade electroplated grid type fluorescent lamp set matched with the ceiling. The specification is: 600×1200, the lamp adopts PHILIPS lamp, high brightness, no glare, uniform illumination, low noise and quick start. Give people a new, safe, efficient and comfortable working environment. The computer room lighting system uses multiple sets of 3×36W embedded grille light panels (600×1200). One of them came back with UPS power. The choice of light source for lighting design and the selection of lamps are important. After selecting the light source that satisfies the color rendering, start-up time, and illumination requirements, the model and specifications of the lamp are determined based on the comprehensive comparison of the efficiency, life, and price of the light source, the lamp, the ballast, and the like.
Computer room emergency lighting design
Computer room lighting is a combination of electrical and architectural decoration art, and is an important part of the construction of the computer room. According to the architectural requirements of different computer rooms and the characteristics of the environment, the lighting design is different, but it will be considered from the following aspects: calculating or looking up the table to find the appropriate illuminance level, handling the spatial brightness distribution, grasping the color temperature and color rendering. To effectively limit the glare, create the correct direction of light projection, and so on, to create a perfect shape and three-dimensional sense, and establish a good visual environment.
The emergency lighting system should also be considered in the computer room lighting system. Emergency fault lighting generally adopts two schemes, one is to supply power to a route UPS in the lighting circuit, and when the power is cut off, the UPS provides illumination. Another option is to use an emergency fluorescent lamp with a 15-minute backup battery. The average illumination of the emergency lighting is 60Lx. Lighting power supply is generally powered by the mains, and is transferred to the emergency power supply system when the mains is stopped.
In order to describe the magnitude of the change in surface illuminance, the concept of illuminance uniformity is proposed: the ratio of the minimum illuminance to the average illuminance produced on a horizontal plane 0.75 m above the ground. In order to make the equipment room have the same illumination level, the lighting fixtures should be arranged so that the illumination uniformity is greater than 0.7. Otherwise, the lamps should be re-selected and reasonably arranged to achieve satisfactory results.
Computer room lighting design method
The computer room lighting design includes planes and systems. First of all, we must carefully analyze the needs of the room lighting. For example, the lighting design of the computer room requires soft light, which is suitable for the physiological needs of the human body. It cannot affect the work of the computer due to interference from the lighting power supply. The illuminance value is selected according to the "Design Specification for Electronic Information System Room". The illuminance of the main room should be less than 3001x from the ground; the illuminance in the auxiliary room should not be lower than 1501x; the emergency lighting should be greater than 301x; the illuminance of the emergency exit sign and evacuation indicator should be greater than 5lx.
There is no glare in the basic work room in the main room, the glare limit level is I; the first type of auxiliary room glare limit level is D level, which can have slight glare; the second and third type auxiliary room glare limit level is III. Allow glare and so on. In the selection and arrangement of lamps, in addition to the requirements of the electrical design specifications of the equipment room, the number of lamps should be calculated and determined by combining natural lighting and wall reflectivity. The current value of the general computer room lighting power density (W/m2) can be calculated at 18W/m2 points. Each functional room features an embedded grille fluorescent fixture. In the arrangement of the lamps, the interval of the lamps is determined according to the installation height (ie the height of the ceiling). Under the premise of ensuring illumination, factors such as uniformity of illumination and effective suppression of glare are fully considered. The lamps installed in rows should be straight and neat. The uniformity of the general illumination in the work area (the ratio of the minimum illumination to the average illumination) should not be less than 0.7. The illuminance of the non-work area should not be less than 1/5 of the average illuminance of the work area.
In addition to the layout of the lamps in each machine room, emergency lighting requirements should be considered. After the power outage of the city, in order to ensure that the staff to do emergency processing such as saving, a certain number of emergency lighting fixtures are arranged in the machine room. Efficient emergency lighting is used, and it is automatically put into operation when the utility power is cut off. The emergency lighting is powered by the UPS power supply, and the lamps are arranged evenly without dead angles. After the emergency treatment is ensured, personnel can evacuate to the exit or emergency exit along the passage safely and quickly. The lighting branch pipeline refers to the distribution box system diagram, and the emergency lighting is powered by the building EPS power supply. In the design of the lighting box power supply line, in addition to the general power supply line, about 1/3 of the UPS power supply should be considered to ensure the emergency state. The next person evacuates the lighting.
The control of the luminaire should be divided, split, and centralized, especially for large-area lighting fixtures. General lighting uses electronic ballasts. When using magnetic ballasts, capacitor compensators should be added. The partition, split, and centralized control modes of the main room lighting are shown. In addition, the standby lighting should be set in the equipment room as part of normal lighting, and its capacity is generally normal lighting.
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