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Matters to be considered for air conditioning purification in Dongguan purification project


Air conditioning purification is a large energy consumer, and energy conservation measures need to be taken into consideration in the design and construction of Dongguan purification projects. In the design, the division of the system and area, the calculation of the supply air volume, the determination of the temperature and relative temperature, the determination of the cleanliness level and the number of ventilations, the fresh air ratio, the insulation of the air duct, and the form of the mouthpiece in the production of the air duct on the leakage rate The influence, the influence of the connection angle of the main pipe branch on the airflow resistance, whether the flange connection is leaking, and the choice of equipment such as air conditioning boxes, fans, and chiller units are all related to energy consumption, so these details must be considered.

The automatic control device guarantees the full adjustment. At present, some manufacturers use manual methods to adjust the air volume and air pressure. However, because the control valves that control the air volume and air pressure are in the technical compartment, and the ceiling is also a soft steel ceiling with color steel plates, basically They are adjusted during installation and commissioning. Since then, most of them have not been adjusted. In fact, they cannot be adjusted. In order to ensure the normal production and work of the clean plant, a relatively complete set of automatic control devices should be set up to achieve the following functions: clean room air cleanliness, temperature and humidity, pressure difference monitoring, damper adjustment; high-purity gas, pure water and circulating cooling Detection of water temperature, pressure and flow; monitoring of gas purity, pure water quality, etc. The air filter of the purification air-conditioning system increases the resistance with the increase of the operating time. In order to maintain the air volume, the damper in the system needs to be adjusted. When the system is started during system commissioning, in order to start the fan at no load, the air valve at the fan outlet needs to be closed. After the fan is started, it is very difficult to open it because of the pressure on the air valve. After using the variable frequency speed control device of the fan to control the change of the pressure difference between the front and rear of the air filter, the adjustment of the supply air volume will become very easy and the supply air pressure will be stable. These monitoring devices can be designed as a single system measurement, control system, or as a centralized computer control and management system. When the air conditioner system is stopped without wind or over temperature, the electric heater will continue to supply electricity to heat, causing equipment damage or even a fire. To avoid this situation, protection against wind and over temperature power failure should be provided.

Multi-machine chiller is more flexible. If the chiller of Dongguan purification project requires a large cooling capacity, it is not suitable to use a single machine, multi-mechanism should be used, and the motor should use variable frequency speed regulation to reduce the starting power. Multiple machines can be used flexibly, so there is no waste of energy in the "big horse-drawn cart".

Choosing an air-conditioning box based on climatic conditions The choice of air-conditioning box should be considered in the climate environment of Dongguan purification project. For example, in northern areas with low winter temperatures and high air dust content, a fresh air preheating section should be added to a general-purpose air-conditioning unit, and a water spray air treatment method should be used to wash the air and generate heat and temperature. Reach the required temperature and humidity. In the southern regions where the climate is humid and the dust concentration in the air is low, there is no need to preheat the fresh air in winter, and the initial filtration is used for air filtration and temperature and humidity adjustment. Temperature and dehumidification process, and then through intermediate efficiency filtration and terminal high efficiency or sub high efficiency filtration. It is best to use a variable frequency fan for the fan of the air conditioner. This not only saves energy, but also flexibly adjusts the air volume and pressure.
The air-conditioning room should be located on the side of the clean room. The location of the air-conditioning room in Dongguan purification project should be on the side of the clean room. This not only saves energy, but also facilitates the layout of the air duct, and makes the air flow organization more reasonable. At the same time, it can save engineering costs .

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