1 General Provisions
1.0.1 This code is formulated with view to making the industrial enterprises improve working conditions, raise labour productivity, ensure product quality and personal safety, adopt advanced techniques in the design of heating, ventilation and air conditioning, rationally utilize and conserve energy and resources, and protect environment.
1.0.2 This code is applicable to the design of heating, ventilation and air conditioning of constructed, renovated and extended industrial buildings and structures. This code is not applicable to the design of heating, ventilation and air conditioning of such buildings, clean factory buildings and temporary structures for special purpose or with special cleaning or special protection requirements.
1.0.3 The design scheme of heating, ventilation and air conditioning shall be determined jointly with the disciplines concerned via comprehensive technical and economic comparison according to the production process requirements and the purposes, functions, application requirements, cooling and heating load structure characteristics, environmental conditions and energy conditions of buildings and in combination with the current relevant national principles and policies on health, safety, energy conservation and environmental protection, etc. In the design, new techniques, technologies, equipment and materials should be adopted.
1.0.4 In the design of heating, ventilation and air conditioning, the requirements and the relevant codes for construction and acceptance shall be explicitly defined. Where there are special requirements for construction and acceptance, they shall be described in the design documents.
1.0.5 In addition to the requirements stipulated in this code, the design of heating, ventilation and air conditioning of industrial buildings shall also comply with the current relevant standards of the nation.
2 Terminologies
2.0.1 Industrial building
The general terms for production buildings, warehouses, common auxiliary buildings, and auxiliary living and administrative buildings.
2.0.2 Activity area
It refers in particular to human activity area in building in this code, which generally refers to the space within 3m height above the ground, floor or operating platform.
2.0.3 Work site
The post or operation site where the personnel frequently or periodically stay to take part in occupational activities or carry out production management.
2.0.4 Explosive gas atmosphere
An atmosphere where gasiform, vaporous or foggy combustible substances constitute a kind of mixture with air under atmospheric conditions, and combustion will spread over the whole unburnt mixture after this mixture is ignited.
2.0.5 Dry-type collection
A kind of dust collection method with which the dust or smoke is collected at dry state, with no increase of moisture content.
2.0.6 Wet separation
A kind of dust collection method with which the dust or smoke is collected at slurry state.
2.0.7 Industrial air conditioning system
The air conditioning system with relatively high requirements for indoor temperature, humidity and cleanliness and for the purposes of primarily satisfying the production process requirement and secondly considering the personal comfort.
2.0.8 Comfort air conditioning
The air conditioning system set for the purpose of satisfying the working and living needs of people.
2.0.9 Zoning two-pipe water system
A two-pipe system that the air conditioning water route is divided into cold water pipe and cold-hot water pipe according to the load characteristics of buildings.
2.0.10 Two fluid humidification
A kind of technique that humidifies air with both the atomized water by air compression and the water mist.
2.0.11 Mine air conditioning
Mine inlet air heating technique applied for the mines in severe cold and cold areas in order to avoid freezing of well mouth or maintain certain ambient temperature at working face in winter as well as artificial refrigerating and air-conditioning cooling technique applied for the hot wells with higher temperature of primitive rock or the deep wells in order to maintain certain ambient temperature at the working face.
3 Basic Requirements
3.0.1 The thermal comfort evaluation on indoor environment of buildings shall meet the relevant requirements of the current national standard "Moderate Thermal Environments- Determination of the PMV and PPD Indices and Specification of the Conditions for Thermal Comfort" (GB/T 18049); as for evaluation indexes, the value of predicted mean vote (PMV) should be greater than or equal to -1 and should be less than or equal to 1, and the value of predicted percent dissatisfied (PPD) should be less than or equal to 27%.
3.0.2 Proper heat insulation and heat control measures shall be taken at the high temperature operation locations. The high temperature operation locations shall meet the relevant requirements of the current national standard "Classified Standard of Working in the Hot Environment" (GB/T 4200), and the operating environment shall be classified and evaluated.
3.0.3 The heating, ventilation and air conditioning equipment shall be selected according to the design working conditions.
3.0.4 Spaces necessary for installation, operation and maintenance of equipment, pipelines and accessories shall be considered in the design of heating, ventilation and air conditioning system, and the holes for installation and maintenance shall be reserved in architectural design. As for large equipment and pipelines, corresponding transportation channels and lifting facilities shall be equipped.
3.0.5 In the design of heating, ventilation and air conditioning, proper safety protection measures shall be taken against the equipment and pipelines which may cause personal injuries.
3.0.6 As for the projects located in earthquake area or collapsible loess area, precautions against earthquake and settlement shall be taken respectively as needed in the design of heating, ventilation and air conditioning.
3.0.7 The water quality of heating and air conditioning system shall meet the relevant requirements of "Water Quality for Industrial Boilers" (GB/T 1576) or "Water Quality for Heating and Air Conditioning Systems" (GB/T 29044).
1 General Provisions
2 Terminologies
3 Basic Requirements
4 Indoor and Outdoor Design Conditions
4.1 Indoor Air Design Conditions
4.2 Outdoor Air Design Conditions
4.3 Solar Irradiance in Summer
5 Heating
5.1 General Requirements
5.2 Heating Load
5.3 Radiator Heating
5.4 Hot Water Radiant Heating
5.5 Gas-Fired Infrared Heating
5.6 Warm Air Heating and Warm Air Curtain
5.7 Electric Heating
5.8 Heating Pipe
5.9 Heat Metering and Control
6 Ventilation
6.1 General Requirements
6.2 Natural Ventilation
6.3 Mechanical Ventilation
6.4 Emergency Ventilation
6.5 Heat Insulation and Heat Control
6.6 Exhaust Hood
6.7 Air Duct Design
6.8 Equipment Selection and Layout
6.9 Fire Protection and Explosion Proofing
7 Dust Removal and Cleaning of Harmful Gas
7.1 General Requirements
7.2 Dust Removal
7.3 Cleaning of Harmful Gas and Vapor
7.4 Equipment Layout
7.5 Exhaust Vertical Pipe
7.6 Dust Inhibition and Vacuum Sweeping
7.7 Transportation of Dust
8 Air Conditioning
8.1 General Requirements
8.2 Load Calculation
8.3 Air Conditioning System
8.4 Space Air Distribution
8.5 Air Handling
9 Heating & Cooling Source
9.1 General Requirements
9.2 Compression-type Water Chiller
9.3 Lithium-bromide Absorption-type Water Chiller
9.4 Heat Pump
9.5 Evaporative Water Chiller
9.6 Combined Cool, Heat and Power
9.7 Thermal Storage
9.8 Heat Exchanger
9.9 Hot & Chilled Water System and Condensed Water System
9.10 Cooling Water System
9.11 Refrigeration and Heating Room
10 Mine Air Conditioning
10.1 Mine Air Heating
10.2 Mine Air Cooling
11 Monitoring and Control
11.1 General Requirements
11.2 Transducer and Actuator
11.3 Heating System
11.4 Ventilation System
11.5 Dust Removal and Cleaning System
11.6 Air Conditioning System
11.7 Heating and Cooling Source and its Water System
12 Noise Reduction and Vibration Isolation
12.1 General Requirements
12.2 Noise Reduction and Sound Insulation
12.3 Vibration Isolation
13 Heat Insulation and Corrosion Protection
13.1 Heat Insulation
13.2 Corrosion Protection
Appendix A Outdoor Air Design Conditions
Appendix B Simplified Statistic Methods for Outdoor Air Design Temperature
Appendix C Global Solar Irradiance for Summer
Appendix D Solar Irradiance through Standard Window Glass for Summer
Appendix E Distribution Map of Atmospheric Transparency for Summer Air Conditioning
Appendix F Heat Loss for Heating Cold Air Infiltrated through Gaps of Doors and Windows
Appendix G Value of Orientation Correction Factor n for Cold Air Infiltration
Appendix H Calculation of Natural Ventilation
Appendix J Calculation of Local Air Supply System
Appendix K Minimum Wind Speed in Dust Removal Pipe
Appendix L Capacity of Ice Storage Equipment and Standard Rating of Duplex Refrigerating Machine
Explanation of Wording in This Code
List of Quoted Standards
