Green cloud computing Technology in Europe

Absrtact: As energy conservation and environmental protection http://www.aliyun.com/zixun/aggregation/30578.html "> Laws and regulations of the most sound economy, Europe is particularly focused on improving the efficiency of data center energy use, Optimized IDC Power Utilization Efficiency (PUE), thermoelectric cold supply, ice cap cooling, cabinet cold, natural cooling, heat recovery technology and magnetic levitation centrifugal technology, such as the early adoption, so that the European data center is the most likely to be the first to optimize the ideal state of pue=1.2 data center.

Data centers in the cloud computing age require data centers to remain highly available, operate efficiently and securely, and, on the other hand, require data centers to reduce energy consumption and operational costs as much as possible, and the data center must have flexible scalability to cope with changing business needs and future uncertainties. According to the latest statistics, the computer room air-conditioning system accounted for the total data center of the electricity consumption ratio reached nearly 45%, of which the cold source part accounted for 2/3. The construction of Green data center, the energy-saving solution of room air-conditioning is the most important and urgent.

Czech Union group, as a company engaged in precision power supply and air-conditioning equipment, the international group, not only committed to the development of the Chinese market, but also focus on the introduction of foreign advanced technology and ideas for China's data center energy-saving enterprise to provide mature products and early application experience.

1. Cold water chiller with natural cooling

In the summer, the natural cooling unit and the normal air-conditioning is still using compressor refrigeration. In the transition season, when the ambient temperature is lower than the chilled water return temperature of 2 ℃ or more, open freecooling natural cooling, the use of cold air chilled chilled water, no compressor power consumption, the natural cooling of the insufficient part of the conventional compression refrigeration relay, thereby reducing the system power consumption. In winter, completely rely on freecooling natural cooling cooling chilled water, no need to start the compressor, only a small number of fan power consumption, energy efficiency than up to 20.

Data centers generally require year-round uninterrupted cooling, conventional refrigeration systems, and the outdoor temperature even below or far below its circulating chilled water chiller needs to run as usual. Natural cooling (freecooling) units and conventional chillers is the biggest difference is that it has a unique air-cooled natural cooling heat exchanger, its operation priority to use the natural environment of low-temperature air cooling circulating chilled water, can be achieved without compressor operation refrigeration, significantly reduce the power consumption of compressors.

By natural cooling technology, the working time and intensity of compressor are reduced during the transition season and winter, and the refrigeration power consumption is reduced effectively. Compared with conventional chillers, Beijing latitude area for example, perennial energy-saving to reach 30%~38%.

2. Heat Recovery Technology Utilization

Large data centers need uninterrupted cold source all the year round, which requires efficient refrigeration of chiller. and the data center supporting the surrounding office, transport and peacekeeping dormitories in the winter but also need a lot of heat to solve the heating problem.

In conventional design, heating requires a boiler or heat pump solution, which consumes a lot of energy. New heat recovery technology, free of the refrigeration unit in the cooling time to the environment emissions of condensation heat to heat the heating system, which does not require a boiler or heat pump system. When heating is needed in winter, the system recycles the condensation heat to achieve, and the excess condensation heat is still discharged into the environment. As a result of the refrigeration unit, the comprehensive energy efficiency ratio reaches the 9~10, which is incomparable to the efficiency of any other cooling machine. Using this heat recovery technology, a data center in the tens of thousands of square meters of office, transport and peacekeeping dormitories can be achieved free heating.

3. High-efficiency maglev centrifugal water chiller

Magnetic levitation centrifugal compressor represents the most advanced technology trend of compressors today. The technology of high efficiency maglev oil-free centrifugal compressor with variable frequency drive adopts magnetic levitation bearing technique, the high performance pulse width modulation (PWM) Permanent magnet synchronous motor is automatically adjusted with the change of load to ensure that the unit is in the best running state at all times, so that the unit can run efficiently at full load and partial load. No oil lubricated magnetic bearings, no contact friction, no lubrication oil system, significantly increase the reliability of the unit, maintenance is simple and convenient; no heat exchanger oil film thermal resistance, can increase evaporation, condensation heat transfer efficiency of up to 15%, improve the efficiency of centrifugal unit operation.

Built-in inverter, so that the compressor in part of the load to achieve variable speed operation, motor speed and import guide vane optimization control, so as to achieve the partial load of efficient operation, reduce operating costs; New soft start function, reduce the unit starting current to 2 A, reduce the impact on the power grid. Unit with today's highest part of the load efficiency, eseer up to 9.58,IPLV value of up to 10, regardless of the full load, or under partial load, the unit has a very high energy efficiency coefficient, so as to achieve system energy saving.

(Responsible editor: admin)