(1) Differential pressure demand

1. The ventilation and cooling project of the plant is very important for the control of the differential pressure. In the production practice, in order to control the dust and pollution and the heat source, the static pressure difference of the room with large dust and large heat source is determined to be smaller than other. Room (zone) to control the environment of the cooling zone of the entire plant.

2. The clean room has a positive pressure. The static pressure difference between clean areas with different air cleanliness and between clean and non-clean areas should not be less than 5Pa, and there should be equipment indicating the pressure difference.

(2) Noise control

1. In order to control the equipment and duct noise, the noise treatment should be considered when drawing, in order to control the environmental noise of the entire clean area (room). The noise level in the clean room should not exceed 75dBA during the dynamic test.

2. According to the needs of the clean area (room) environment, a muffler or static pressure box can be drawn at the air outlet of the air conditioning unit to control the equipment and duct noise.

3. According to the needs of the clean area (room) environment, when drawing the air supply, the method should be adopted to control the equipment and duct noise.

(3) Comfort air conditioning system resistance budget

1. The comfort budget of the comfort air conditioning system is that the unit can overcome the resistance of the system, together with the air volume output. System resistance consists of two aspects: duct resistance and indoor positive pressure.

2. Duct resistance includes frictional resistance and partial resistance along the path. When the frictional resistance along the budget is reached, the air supply duct can be budgeted at 2~4Pa/m; when the budget is partially resisted, the reducer can be used for nearly 35 Pa/piece for budget, and the three-way can be budgeted for 40 Pa/piece, elbow The budget can be calculated at 25Pa/piece.

3. The indoor positive pressure is usually drawn between 10~50Pa, and the budget can be selected from 10~15Pa.

Disadvantages of cooling pad air cooler

Cooling pad air coolers, also known as energy-saving and environmentally-friendly air conditioners, are popular in the market for their advantages of energy saving, good cooling, low investment, low cost, and ventilation. Traditional cooling pad air coolers need to be wall mounted or bracket mounted. The low-rise installation is relatively convenient. If it is a high-rise, it will be very troublesome.

1. When the high-rise wall is installed, the construction risk is high, and the workers work in mid-air. Once the consequences of the failure are unimaginable, not only the construction party must bear the liability for compensation, but also the users must bear joint and several liability.

2, the weight of the air cooler plus the total weight of the water is also very large, hanging in the high altitude is not assured, the quality of the bracket material, the installer is careful, the bracket with the wind and rain intensity reduction, wind and lightning strikes, etc. If you make a mistake, it will cause the chiller to fall.

3. When installing, it is necessary to make a hole in the wall or break the window, causing damage to the workshop. It is not convenient to clean in the high place at ordinary times. In winter, it can not be removed and can only be subjected to severe winter in the outdoor, and the service life is greatly affected.