What is the stipulation of Guangxi green building design code for air conditioning water system?

Code for Design of Green Buildings in Guangxi is a guiding document for green buildings in Guangxi, which represents the highest level of green buildings in Guangxi and plays a normative and guiding role in the design of green buildings in Guangxi. Among them, what is the regulation of air conditioning water system in the Code for Design of Green Buildings in Guangxi? The following is an introduction to the provisions of the Code for Design of Green Buildings in Guangxi brought by the construction network for reference.

The supply and return water temperature of air conditioning system shall meet the following requirements:

1) Except for the air conditioning system with independent temperature and humidity control, the water supply temperature of electric refrigeration air conditioning cold water system should not be higher than 7℃, and the temperature difference between supply and return water should not be less than 5℃.

2) When using four-tube air conditioning water system, the temperature difference between supply and return water of air conditioning hot water system should not be less than 5℃.

3) When the cold source of ice storage air conditioner is used or there is chilled water below 4℃, and the air conditioning terminal is in the form of all-air system, the chilled water system with large temperature difference should be adopted to save the power consumption of chilled water pump.

4) When the supply distance of air-to-water transfer system is more than 300m, and the technology and economy are reasonable, the water temperature with large temperature difference and small flow rate should be adopted.

Air conditioning water system shall meet the following requirements:

1) In addition to cold storage, heat storage pool for cooling and heating, and water spraying for air treatment, etc. Closed circulating water system should be adopted for cold and hot water of air conditioner.

2) In order to ensure the efficiency of refrigeration and cold-heat exchange of air conditioning system equipment, necessary water treatment measures such as filtration, decontamination, anticorrosion, scale inhibition and algae removal should be taken for the water system according to the local water quality situation.

3) When the air conditioning water system is arranged and the pipe diameter is selected, the relative difference of pressure loss between parallel loops should be reduced; When it exceeds 15%, the necessary hydraulic balance device should be configured according to the requirements of hydraulic balance on the basis of calculation.

The most unfavorable loop of air conditioning water system should not be equipped with high resistance valve. The pipe diameter should be determined according to the economic specific friction resistance, and the total resistance of the pipeline or the calculated head of cold and hot water circulation of air conditioning should meet the requirements of cold and hot water transfer coefficient in Code for Design of Building Energy Efficiency in Guangxi (DB45/T392-2007).

Condensed water of air conditioning equipment should be collected and discharged in an organized way.

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