Study on outside air cooling systems used in data processing facilities

Iwao Yamaguchi, Makoto Koganei, Tomonobu Goto, Masataka Tsushima

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


It is currently estimated that with the increasing numbers of IT equipment, the amount of information data used by society will reach 200 times the present volume by 2025. Under such circumstances, there is an urgent requirement for cooling systems in server rooms with high density servers and compatibility with faster and larger servers along with high environmental efficiency. This survey carried out an experiment in which energy performance measurements with variance of outside air taken into the server room in a real size server room were taken. The results show that the cooling load of air conditioners could be approximately 90 percent less than that of the conventional air conditioning system for server rooms and that the overall energy consumption and COP are increased by 18 percent and 24 percent of the maximum respectively, compared to those of the conventional systems under maximum heat load conditions.

Original languageEnglish
Pages (from-to)219-223
Number of pages5
JournalJournal of Asian Architecture and Building Engineering
Issue number1
Publication statusPublished - 2012
Externally publishedYes


  • Data center
  • Energy saving
  • Outside air cooling
  • Server

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Architecture
  • Cultural Studies
  • Building and Construction
  • Arts and Humanities (miscellaneous)


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