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Raised Floor Airflow Temperature Controlled Unit (Underfloor VAV Damper & EC Fan) Improve Efficiency Significantly

2020/1/16 14:54:20

With mandatory air cooling via raised floors, the current requirements for low operating costs, high flexibility and redundancy can be met with a proven airflow system when air conditioning data centers. In most cases, however, the air exits the raised floor in an unregulated manner. Raised floor system controlled by floor temperature sensors with variable opening degrees is an important component here in order to reduce the energy required for air conditioning, this is known as the Temperature Control VAV System. 

Raised Floor Airflow Management System For Date Center

In most cases, the manufacturer of the raised floor also supplies the perforated access floor panels for the air outlet. The customer can usually choose between different degrees of perforation. Some manufacturers also offer throttle plates, which are mounted on the underside of the plate and thus allow manual control of the air volume.

However, the amount of air actually required depends on the load on the server. In the age of server virtualization and cloud technologies, in particular, load fluctuations occur because entire racks are switched on or off. In line with the fluctuating load behavior of the servers, flexible solutions are also required for air conditioning. The challenge is to provide the servers with sufficient, targeted, cooled air. Sufficient means that exactly the amount of air leaves the raised access floor that is currently required by the servers. Targeted means that the air emerges from the raised floor as directly as possible before the air intake of the server rack. The latter applies in particular where cold and warm aisles are not separated from one another by structural measures. By mixing cold air directly in front of the server intake, the mixing of cold and warm air is reduced. One can, therefore, speak of a virtual containment.

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Huiya Raised Floor Temperature Controlled Unit - VAV Damper & Underfloor Fan System

In an underfloor air distribution system, diffuser design and capacity modulation, are keys to achieving suitable comfort levels in the breathing zone. With the underfloor VAV damper and fan system, AccessFloorStore.Com offers a versatile solution that, with its dimensions of 600 mm x 600 mm, fits into the grid of standard access floors. The degree of opening of the flaps can be regulated via the building management system (BMS) or directly from the Temperature Control VAV damper's own controller via the temperature or pressure differences. If the power supply is interrupted, the flaps are opened automatically by a return spring. The whole temperature controlled unit closes with a flow-optimized grating and is therefore also protected against mechanical loads, for example from lifting vehicles.

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Raised Access Floor underfloor fan systems provide direct cooling in hard-to-cool areas where high-density server clusters cause hot spots. It also provides extra airflow in areas with low pressure under the floor. Because the load in the cabinet is fairly static, this more cost-effective approach is sufficient for most data center needs. If necessary, both floor temperature sensors can be installed in the floor fan assembly. One sensor is connected to the thermostat and the other is stored in the thermostat electrical box. In case the first sensor is damaged, the second sensor can be connected without having to remove the tile to install a new sensor. For sites with more dynamic loads, the temperature control unit supports up to three remote temperature sensors to control fan speed as the temperature increases or decreases.

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