Tell me about the construction standards of computer rooms.

National Standard: Electronic Computer Room Design Specifications

Chapter 1 General Provisions

Article 1.0.1 In order to ensure the stability and reliability of the electronic computer system in the design of the electronic computer room This specification is formulated to provide a good working environment for the personnel who operate and ensure the computer room, to achieve technological advancement, economical rationality, safety and applicability, and to ensure quality.

Article 1.0.2 This specification is applicable to the design of electronic computer rooms with a building area greater than or equal to 140 square meters on land that are newly built, renovated and expanded. This specification does not apply to computer rooms and microcomputer rooms for industrial control.

Article 1.0.3 In addition to complying with this specification, the design of electronic computer rooms should also comply with the provisions of relevant current national standards and specifications.

Chapter 2 Computer Room Location and Equipment Arrangement

Section 1 Computer Room Location Selection

Article 2.1.1 The computer room is located in a multi-story building or It should be located on the second and third floors of high-rise buildings.

Article 2.1.2 The location selection of the computer room should meet the following requirements:

1. Sufficient water source, stable and reliable electronics, convenient transportation and communication, and clean natural environment;

2. Stay away from factories, warehouses, storage yards, etc. that produce dust, oil fumes, harmful gases, and produce or store corrosive, flammable, and explosive items;

3. Stay away from sources of strong vibrations and strong noise sources;

4. Avoid strong electromagnetic field interference.

Article 2.1.3 When it is impossible to avoid strong electromagnetic field interference or to ensure the security of computer system information, effective electromagnetic shielding measures can be taken.

Section 2 Computer Room Composition

Article 2.2.1 The composition of the computer room should be determined according to the computer operating characteristics and specific equipment requirements. Generally, it should consist of a main computer room, a basic work room , the first type of auxiliary room, the second type of auxiliary room, the third type of auxiliary room, etc.

Article 2.2.2 The usable area of ??the computer room shall be determined based on the overall dimensions and layout of the computer equipment. When the external dimensions of computer equipment are not fully understood, the usable area of ??the electronic computer room should comply with the following regulations:

1. The area of ??the main computer room can be determined according to the following methods:

1. When the computer system equipment has been selected, it can be calculated according to the following formula:

A=K∑S (2.2.2-1)

In the formula, A--used in computer main room Area (m2);

K - coefficient, value is 5 to 7;

S - projected area of ??computer system and auxiliary equipment (m2).

2. When the computer system equipment has not yet been selected, it can be calculated according to the following formula:

A=KN (2.2.2-1)

Formula Medium K - the area occupied by a single device, which can be 4.5 to 5.5 (m2v/unit);

N - the total number of all devices in the computer host room.

2. The total area of ??the basic workroom and the first type of auxiliary room should be equal to or greater than 1.5 times the area of ??the main computer room.

3. Computer preparation rooms, external user studios, hardware and software staff offices, etc. can be calculated as 3.5m2 to 4m2 per person.

Section 3 Equipment Arrangement

Article 2.3.1 Computer equipment should be arranged in partitions, which can generally be divided into host area, memory area, data input area, and data output area , communication area and monitoring control and dispatch area, etc. The specific division can be determined according to system configuration and management.

Article 2.3.2 Equipment that requires frequent monitoring or operation should be arranged to facilitate operation.

Article 2.3.3 Equipment that generates dust and waste should be kept away from dust-sensitive equipment and should be concentrated near the return air outlet of the computer room.

Article 2.3.4 The distance between the passage and the equipment in the main computer room shall comply with the following regulations:

1. The distance between the fronts of two opposite cabinets shall not be less than 1.5m;

2. The distance between the side (or side) of the cabinet and the wall should not be less than 0.5m. When maintenance and testing are required, the distance from the wall should not be less than 1.2m;

3. Clear width of the aisle It should not be less than 1.2m.

Chapter 3 Environmental Conditions

Section 1 Temperature, Humidity and Air Dust Concentration

Article 3.1.1 In the main computer room and basic workshop Temperature and humidity must meet the requirements of computer equipment.

Article 3.1.2 The temperature and humidity in the computer room should meet the following requirements:

1. The temperature and humidity in the computer room when starting up should comply with Table 3.1.2 -1 rule.

Table 3.1.2-1 Temperature and humidity of computer room when starting up

Level items Level A Level B

Summer and winter all year round

Temperature 23 ±2 ℃ 20±2 18-28 ℃

Relative humidity 45-65 40-70

Temperature change rate lt; 5℃\h and no condensation allowed lt; 10℃/h and no condensation allowed

2. The temperature and humidity in the computer room during shutdown should comply with the provisions of Table 3.1.2-2

Table 3.1. 2-2 Temperature and humidity of the electronic computer room during shutdown

Project Level A Level B

Temperature 5-35℃ 5-35℃

Relative humidity 40 -70 20-80

Temperature change ratelt; 5℃/h and no condensation allowedlt; 10℃/h and no condensation allowed

Article 3.1.3 Host when starting up The temperature and humidity of the room should be level A. The basic workroom can be level A and level B according to the equipment requirements. Other auxiliary rooms should be determined according to the process requirements.

Article 3.1.4 The temperature and humidity of the recording media library should meet the following requirements:

1. The temperature and humidity of the commonly used recording media library should be the same as the host room;

2. The requirements for other recording media libraries should be adopted in accordance with Table 3.1.4.

Table 3.1.4 Temperature and humidity of recording media library

Type card paper tape magnetic disk

Long-term storage of recorded unrecorded recorded unrecorded Recorded

Temperature 5-40℃ 18-28℃ 0-40℃ 18-28℃ 0-40℃

Relative humidity 30-70 40-70 20-80 20- 80

Magnetic field strength lt; 3,200A/m lt; 4,000A/m lt; 3,200A/m lt; 4,000A/m

Article 3.1.5 The dust concentration in the air in the main engine room was tested under stated conditions. The number of dust particles greater than or equal to 0.5 μm per liter of air should be less than 18,000 particles.

Section 2 Noise, Electromagnetic Interference, Vibration and Static Electricity

Article 3.2.1 The noise in the main engine room shall be measured at the position of the main operator when the computer system is shut down. Less than 68dB(A).

Article 3.2.2 The radio interference field strength in the host room should not be greater than 126dB when the frequency is 0.15 ~ 1,000MHz.

Article 3.2.3 The magnetic field interference environment in the main computer room shall not exceed 800A/m.

Article 3.2.4 When the computer system is shut down, the vertical and horizontal vibration acceleration values ??of the main computer room floor surface should not be greater than 500mm/s2.

Article 3.2.5 The electrostatic leakage resistance of the computer room floor and work surface shall comply with the provisions of the current national standard "Technical Conditions for Raised Floors in Computer Rooms".

Article 3.2.6 The electrostatic potential of the insulator in the main computer room should not be greater than 1kV.

Section 4 Interior Decoration

Article 4.4.1 The interior decoration of the main computer room should be airtight, dust-free, easy to clean, and resistant to changes in temperature and humidity. Materials with small deformation should meet the following requirements:

1. The surfaces of walls and ceilings should be smooth to reduce dust accumulation and avoid glare. If it is plastering, it should meet the requirements of advanced plastering.

2. A raised floor should be laid. The raised floor should comply with the requirements of the current national standard "Technical Conditions for Raised Floors in Computer Rooms". The laying height should be determined according to actual needs, and should be 200~350mm.

3. The floor and wall decoration under the raised floor can be plastered with cement mortar. The floor material should be smooth and wear-resistant. When the space under the raised floor is a static pressure box, the four walls and floor should be made of facing materials that are dust-free, difficult to accumulate dust, and easy to clean.

4. The suspended ceiling should use dust-free sound-absorbing materials. If it is above the suspended ceiling or used for laying pipelines, its four walls should be plastered and the bottom surface of the floor should be cleaned; when the space above the suspended ceiling is a static pressure box , the top and four walls should be plastered and painted with paint that is not easy to fall off. The facings of the pipes should also be made of dust-free materials.

Article 4.4.2 The interior decoration of basic workrooms and first-category auxiliary rooms should be made of materials that are dust-free and easy to clean. Wall and ceiling surfaces should be smooth to reduce dust accumulation surfaces. Decorative materials can take anti-static measures as needed. The floor material should be smooth, wear-resistant and easy to remove dust.

Article 4.4.3 Sealing measures should be taken at the joints of the inner doors, observation windows, pipeline penetrations, etc. of the main engine room and the basic workshop.

Section 4.4.4 The interior color of the computer room should be elegant and soft.

Article 4.4.5 When the main engine room and basic workshop are equipped with external windows, double-layer metal sealed windows should be used to avoid direct sunlight. When aluminum alloy windows are used, single-layer sealed windows can be used, but the glass should be insulating glass.

Article 4.4.6 When water equipment is installed in the main computer room, effective measures should be taken to prevent overflow and leakage of water supply and drainage.

Section 5 Noise and Vibration Control

Article 4.5.1 The main computer room should be far away from noise sources. When this cannot be avoided, noise reduction and sound insulation measures should be taken.

Article 4.5.2 It is not appropriate to install high-noise air conditioning equipment in the main computer room. When installation is necessary, effective sound insulation measures should be taken.

Article 4.5.3 When there is equipment with strong vibration in the second type of auxiliary room, vibration isolation measures should be taken for the equipment and its pipes leading to the main engine room.

Chapter 5 Air Conditioning

Section 1 General Provisions

Section 5.1.1 The main computer room and basic workshop should be equipped with air conditioning systems.

Article 5.1.2 When the air conditioning parameters of the main computer room and other rooms are different, it is advisable to set up separate air conditioning systems.

Section 2 Calculation of Heat and Moisture Load

Article 5.2.1 The heat dissipation of computers and other equipment should be calculated according to the technical data of the product.

Article 5.2.2 The heat and moisture load of computer room air conditioners should include the following:

1. Heat dissipation of computers and other equipment;

2. Heat transfer of building envelope;

3. Solar radiation heat;

4. Human body heat dissipation and moisture dissipation;

5. Heat dissipation of lighting devices;

6. Fresh air load.

Section 3 Air Flow Organization

Article 5.3.1 The air flow organization of the air conditioning system in the main computer room and basic workshop should be based on the equipment’s requirements for air conditioning, the cooling method of the equipment itself, Requirements such as equipment layout density, equipment heat generation, room temperature and humidity, indoor wind speed, dust prevention, and sound attenuation should be comprehensively considered in conjunction with building conditions.

Article 5.3.2 The air flow organization form should be determined according to the requirements of the computer system. When no clear requirements are made, the air flow organization form, air outlet and delivery can be determined according to Table

Table 5.3.2 Air flow organization, air outlet and delivery Air temperature difference

The air flow is organized and sent to the upper and upper return (or side return) side to the side return

Air supply outlet 1. Grille air outlet with adjustable multi-leaf valve 2 .Strip air outlet (raised floor with strip air outlet) 3. Orifice plate 1. Diffuser 2. Air outlet with diffuser plate 3. Orifice plate 4. Louver air outlet 5. Grille air outlet 1. Louver air outlet 2. Grille Air outlet

Return air outlet 1. Grille air outlet 2. Louver air outlet 3. Mesh air outlet 4. Other air outlets

Supply air temperature difference 4-6℃ The supply air temperature should be higher than the indoor air Dew point temperature 4-6℃ 6-8℃

5.3.2 Selection. For computer rooms with high equipment layout density and high equipment heat generation, it is advisable to adopt the method of sending and returning equipment under the movable floor.

Article 5.3.3 When using air supply under the raised floor, the outlet wind speed should not be greater than 3m/s, and the air supply airflow should not be directed towards the staff.

Section 4 System Design

Article 5.4.1 Rooms that require air conditioning in computer rooms should be arranged together; rooms with similar indoor temperature and humidity requirements should be arranged adjacently.

Article 5.4.2 Heating radiators should not be installed in the main computer room. If a radiator is installed, strict leakage prevention measures must be taken.

Article 5.4.3 Non-combustible or refractory materials should be used for the insulation and sound-absorbing materials and adhesives of air ducts and other pipes in computer rooms. Cold surfaces need to be treated with air insulation. When using the air supply method under the raised floor, insulation measures should be taken for the floor.

Article 5.4.4 Air ducts should not pass through firewalls and deformation joints. If it is necessary to pass through, a fire threshold should be set up where it passes through the fire wall; where it passes through the deformation joint, fire dampers should be set up on both sides. Fire thresholds should be both manually and automatically controllable. The air duct insulation materials within 2m on both sides of the air duct passing through the firewall and deformation joints must be made of non-combustible materials.

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