孚莱美科

Electronic Cleanrooms

Frimec recommends the adoption of an MAU + dry coil + FFU air conditioning approach. The FCAH (Fresh Air Combined Air Handling Unit) treats the fresh air supply in terms of temperature, humidity, cleanliness, and noise levels, achieving the indoor enthalpy requirements before distributing it to various process areas. The sensible heat load from indoor equipment, personnel, and lighting is cooled by the dry coil and then circulated within the factory building after dust particles are removed by the Fan Filter Unit (FFU).

Responding to Cleanliness Requirements

To meet the stringent cleanliness requirements, it is necessary to ensure a high number of air changes per hour, resulting in a substantial circulation of air. In 100-class cleanrooms, the air change rate can reach up to 400 times/h, while in 1000-class cleanrooms, it is approximately 50 to 60 times/h.

High Fresh Air Load

In electronic workshops, certain processes emit harmful gases that need to be eliminated through process exhaust systems. Consequently, the design of the fresh air volume must be increased. This similarly leads to an increase in the energy consumption of the fresh air system.

High Fan Total Pressure

Fresh air typically requires a three-stage filtration system, including primary, secondary, and high-efficiency filters, supplemented by chemical filters. The systems often feature multiple sections of heat exchangers. These factors collectively lead to an increase in fan static pressure, which in turn results in higher energy consumption by the fans.

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