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Study on outdoor air cooling system with combined air-side and water-side economizer for data centers. 1. Efficiency comparison of each system.

[In Japanese. / En japonais.]

Author(s) : SHIMMURA K., YAMASHITA T.

Type of article: Article

Summary

This study aims to achieve a higher efficiency of outdoor air cooling systems for data centers. The annual power consumption of air conditioning facilities was calculated after modeling the systems using air-side economizer with evaporative humidifier and water-side economizer with cooling tower. The efficiency of each system was improved by operating the economizer in single mode in winter season and by adding a chiller mode during an intermediate season such as spring or fall. Furthermore, an outdoor air cooling system with a combination of both economizers was proposed. These three systems and a base system were compared, and the influence of outdoor air conditions on the power consumption in various parts of Japan was examined. As a result, it was found that when the base system uses water heat source in a high efficiency turbo refrigerating machine with inverter, the power of the combined economizer system is 80-90% of the base power.

Details

  • Original title: [In Japanese. / En japonais.]
  • Record ID : 30013697
  • Languages: English
  • Source: Transactions of the Society of Heating, Air-Conditioning and Sanitary Engineers of Japan - n. 210
  • Publication date: 2014/09

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