Modern Cooling and Air Conditioning in the DARZ Data Center

  • Cooling and Air Conditioning in Detail
  • Air conditioning: responsibility for people and the environment
  • Cooling center with redundant design and redundant 7MW cooling capacity
  • Use of modern n+1 redundant air cooling systems
  • Indirect free cooling (Zortström distributor)
  • Separation of cold and hot air (cold aisle containment)
  • Measurement and control of temperature and humidity by means of sensors via central BMS
  • Exclusive use of green electricity
  • Double floor of rubber (100% biodegradable)
  • Monitoring of room temperature and relative humidity by sensors
  • Ventilation systems with central and redundant ventilation system

There are several options to ensure optimal temperatures for energy-efficient data centers that comply with ASHRAE (American Society of Heating, Refrigeration and Air-Conditioning Engineers) guidelines. Indirect and direct cooling are two variants which are suitable for this purpose.
The performance density in data centers continues to increase. The energy supply is also increasing at the same time, which is used to cool the IT systems. According to analyses, just over 50 percent of energy consumption is due to the actual IT operation. The rest is used by infrastructure components such as uninterrupted power supply (UPS) and air conditioning. The BITKOM guideline “Energy Efficiency in Data Centers” reports that in a data center with a space of 1,000 square meters about 59 percent of the electricity consumption is attributable to IT components such as servers, network and storage.
At DARZ, we place great value on efficiently cooling our customers’ IT systems and at the same time not spending more energy than is absolutely necessary.

Water cooling at DARZ

Water has a cooling capacity 4,000 times higher than air. The concept of water cooling is to not attempt to cool down the entire room, but to absorb heat directly at the IT infrastructure. For this purpose, the generated heat is dissipated directly at the rear wall of the server cabinets by means of a heat exchanger door through which cooling water flows. The process reduces energy consumption by up to 90 percent.

Due to heat dissipation directly from the rack, the space requirement in the data center is also reduced as there is no need for air conditioning. In theory, server racks can even be stacked, which would be impossible with air cooling. On top of that, the entire process is more environmentally friendly because it also produces less CO2.
In Darmstadt, water cooling projects can be experienced in practice in GSI Green Cube’s data center. It demonstrates how nature and customer benefit to the same extent.

DARZ quality profile
Deutscher Rechenzentrumspreis 2015
Best in Cloud 2015
DARZ TÜV Rheinland
Ökostrom Entega
Initiative Mittelstand 2017
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NetApp Cloud Service Provider
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