What are the advantages and disadvantages of adding fresh air system to fan coil in purification engineering workshop

What are the advantages and disadvantages of adding fresh air system to fan coil in purification engineering workshop

1. Realization of fan coil unit plus fresh air system in purification engineering pharmaceutical cleanroom

Fan coil unit plus fresh air system is an air conditioner terminal organization method widely used in practical projects. This method adopts the combination of fresh air system and fan coil unit,...

Text label: purification engineering workshop, purification pharmaceutical cleanroom, fan coil unit plus fresh air system

What are the advantages and disadvantages of adding fresh air system to fan coil unit in purification engineering workshop

1. Realization of fan coil unit plus fresh air system in purification engineering workshop

Fan coil unit plus fresh air system is an air-conditioning terminal organization method widely used in practical projects. This method adopts the combination of fresh air system and fan coil unit, which solves the problem of fresh air transportation that cannot be solved by using only fan coil unit. insufficient.

The treated fresh air is sent to the air-conditioned room through the fresh air supply duct, and the indoor air is mixed with the incoming fresh air through the return air outlet, and then processed by the fan coil unit, and then sent to the air-conditioned room after meeting the requirements.

2. Fresh air system

The fresh air system can still introduce fresh air from the outside without opening the windows for 24 hours, and remove the turbid and harmful indoor air; the fresh air system is composed of fans, air inlets, air outlets and various pipes and joints. The fan installed in the ceiling is connected to a series of exhaust ports through pipes, the fan starts, and the indoor polluted air is discharged to the outside through the exhaust port and the fan, so that a negative pressure is formed in the room, and the outdoor fresh air enters the room through the air inlet. , so that indoor personnel can breathe high-quality fresh air, which is the fresh air system.

The imbalance of positive and negative pressure leads to air flow. Special equipment is used in the air-conditioned area to send fresh air to the room, and the turbid gas in the room is transported to the outside for air circulation to meet the needs of indoor fresh air ventilation.

3. Advantages and disadvantages of fan coil unit and fresh air system in purification engineering workshop

Fan coil unit plus fresh air system consists of two parts: central air-conditioning fan coil unit and fresh air system. The fresh air system is responsible for the fresh air load to meet the needs of indoor air quality. The fan coil unit plus fresh air system is an important form of air conditioning in the whole water system, and it is a widely used form of air conditioning in purification projects.

(1) Compared with the whole air system, the advantages of the fan coil unit plus fresh air system are as follows:

1) The control application is flexible, it can be flexibly configured and installed according to the specific conditions of different air-conditioning areas, and the temperature of different air-conditioning areas can be flexibly adjusted, and the start and stop of the fan coil unit can be determined according to the usage conditions of the room. Zhongjing Global Purification can provide consulting, planning, design, construction, installation and transformation of GMP workshop, purification pharmaceutical cleanroom, sterile workshop, clean room and other supporting services.

2) The fan coil unit is small in size, small in footprint, convenient in layout and installation, suitable for use in new and old buildings.

3) According to the different requirements for cooling capacity in different areas of the building and the different adjustment methods adopted, it is easy to realize the system partition control, and the cooling and heating load can divide the system into Ruowang according to the room orientation, use purpose, use time, etc. Zone system, implementing zone control.

4) The room temperature can be adjusted independently in each room. When there is no user in the room, the fan can be turned off to save operating costs. Only the fan is turned off, and the cold or hot water is not turned off. The normal use of other rooms will not be affected, and each room The air between them does not collude with each other; the fan can be multi-speed variable, and it can also control the water temperature and water volume, so the adjustment is flexible.

(2) Compared with the whole air system, the fan coil unit plus fresh air system also has the following obvious shortcomings:

1) Due to the scattered setting of the units and the large number of equipments, the maintenance and management workload is heavy.

2) Due to the lack of any filtration measures, the indoor air quality is deteriorated, it is difficult to carry out secondary filtration and condensate leakage is more likely to occur.

3) Due to the limitation of noise, the fan speed should not be too high.

4) The fan coil unit method itself is difficult to solve the problem of fresh air volume. Due to the small static pressure of the unit fan, the airflow distribution is limited, and it is suitable for rooms with a depth of less than 6m.

As mentioned above, correctly understand the advantages and disadvantages of the fan coil unit plus fresh air system, and carry out reasonable design, equipment selection, and correct construction and installation to reduce the negative effects of the inherent defects of the fan coil unit plus fresh air system.

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