Introducing the provisions of Guangxi Green Building Design Code on HVAC construction projects?

The Guangxi Green Building Design Code is the guiding document for green buildings in Guangxi. It represents the highest level of green buildings in Guangxi Province and plays the role of standardizing and guiding the design of green buildings in Guangxi. Among them, what are the provisions of Guangxi Green Building Design Code for HVAC? The following is an introduction to the HVAC provisions of the Guangxi Green Building Design Code brought by Architectural Network for your reference.

General Provisions

The selection of air conditioning cold and heat sources and air conditioning system forms should be based on Guangxi’s energy structure and energy policy, and through technical and economic comparative analysis, select those with high comprehensive energy utilization rates. Heat and cold source and air conditioning system form.

Under the premise of being technically feasible and economically reasonable, renewable energy sources, such as geothermal energy and solar energy, should be given priority as the heat and cold sources of the air conditioning system.

When the technology and economy are reasonable, it is advisable to comprehensively utilize the energy of each system in the building to maximize the energy efficiency of the entire building.

Residential buildings should not use centralized air conditioning systems. When using centralized air conditioning systems, the following requirements should be met:

1) The central air conditioning system used has been determined to be reasonable and feasible by technical and economic comparison.

2) The performance coefficient and energy efficiency ratio of the selected chiller should be one level higher than the relevant specified values ​​​​in the Guangxi local standard "Public Building Energy Efficiency Design Code" DB45/T392.

3) Comply with other energy-saving regulations on centralized air-conditioning systems in relevant standards and specifications.

The selection of the quantity and capacity of air-conditioning cooling and heat source equipment should be based on the building's usage functions, taking into account the efficient operation of the equipment under partial load and low load conditions. The selection of air conditioning equipment should meet the following requirements:

1) The total capacity of air conditioning cold and heat sources, air treatment equipment, and wind and water transportation equipment should be determined based on the cooling load and hydraulic calculation results;

2) Equipment operation efficiency should comply with the relevant provisions of the Guangxi local standard "Public Building Energy Efficiency Design Code" DB45/T392, and equipment with higher efficiency under design load and partial load should be selected;

< p>3) Equipment selection should also consider the reasonable combination of capacity and number of units, so that the system can be in a relatively high efficiency state even when operating at partial load.

In addition to meeting the functional requirements of the system, the pipe materials and insulation materials of the air conditioning and ventilation system should also meet the requirements of renewable or recyclable use.

Frequency conversion energy-saving technology should be used under the following circumstances:

1) Variable speed fans should be used for fresh air units and ventilation fans to adapt to low load conditions;

2 ) Variable flow air-conditioning water system, on the premise of meeting the minimum water volume requirements for the operation of equipment (such as chillers), after technical and economic analysis and comparison, it is appropriate to use variable frequency speed-adjustable water pumps;

3) Air-conditioning cooling tower fans should be used Frequency control type, operates at low speed at low load to save fan power consumption.

Low-noise air conditioning and ventilation equipment should be used, and effective vibration reduction, isolation, and noise reduction measures should be adopted in systems, equipment, pipes (air ducts), and machine rooms. The noise values ​​of noisy equipment such as fans, water pumps, cooling towers and chillers under design conditions should be noted in the construction drawing design documents.

The following principles should be followed to determine reasonable indoor environment parameters:

1) In addition to strict technological requirements, the indoor environment indicators of comfort air conditioners should not exceed the limits of various energy-saving standards;

2) The comfort of the indoor thermal environment should consider the air dry bulb temperature, water vapor partial pressure, air velocity, radiation temperature and the operating characteristics and clothing of indoor personnel;

3) The fresh air volume that complies with the Guangxi local standard "Energy-saving Design Code for Public Buildings" DB45/T392 should be used, and reasonable air supply methods, air flow directions, and correct pressure gradients should be selected to eliminate indoor pollution and odors.

Indoor air conditioning equipment that is easy to adjust and can improve personnel comfort should be used.

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