Key information
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The cooling system of G50 is based on Liebert PDX freon air conditioners.
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Liebert APM modular UPS
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Maximum reliability and energy efficiency
Cooling System
The choice of cooling system was the easiest in the G50 project. Liebert PDX freon air conditioners operate as standard with freon lines of up to one hundred meters of equivalent length. This proved to be important for the data center, which is located on the ground level, and the outdoor air conditioning units are located on the roof of a six-story building.
More details about the products
Usually, for such long routes, more expensive and more difficult to install water-cooled air conditioners are used, which require additional space for the arrangement of the hydraulic module.
Liebert PDX series air conditioners are manufactured in Europe, are Eurovent certified and can be equipped with compressors with adjustable cooling capacity. They operate at high air temperatures to improve energy efficiency, and are equipped with air filters with F5 purification level and a proprietary iCOM controller as standard.
Liebert PDX is the basis of the Smart Aisle technology, which is patented by Vertiv and allows for additional savings of up to 10% in data center cooling energy costs. The largest room of the G50 data center currently has five Liebert PDX air conditioners, which allow a total of 250 kW of heat to be removed (three more will be added soon, each with a capacity of 74 kW). There are three 50 kW units in another airtight zone. In all cases, redundancy is provided according to the N+1 scheme.
Uninterruptible Power Supply
Liebert APM UPS are used to provide uninterrupted power supply. In addition to high reliability and fault tolerance, their compactness also played a role in the choice of UPS. For example, in the largest pressurized zone, designed for 96 cabinets, there are four 150 kW UPSs, which are combined in pairs into 300 kW systems, which provides redundancy according to the 2(N+1) scheme.
The UPS together with two battery module cabinets occupy only nine raised floor tiles. Front-end batteries (commonly used in the telecom industry) are used here. They are somewhat more expensive than traditional batteries, but they are much more compact and safer to maintain. The other two halls of the data center are smaller, with two UPSs each. Power and battery units can be replaced in hot mode - without stopping the entire system.
