General Information
    • ISSN: 2010-0264
    • Frequency: Bimonthly (2010-2014); Monthly (Since 2015)
    • DOI: 10.18178/IJESD
    • Editor-in-Chief: Prof. Richard Haynes
    • Executive Editor: Ms. Nancy Y. Liu
    • Abstracting/ Indexing: Chemical Abstracts Services (CAS), CABI, DOAJ, Ulrich Periodicals Directory, Engineering & Technology Digital Library, Electronic Journals Library, Crossref, ProQuest.
    • E-mail:
  • Feb 21, 2017 News! Vol. 8, No. 3 has been indexed by Crossref.
  • Feb 20, 2017 News! Vol.8, No.3 has been published with online version. 15 peer reviewed articles are published in this issue.
The University of Queensland, Australia
It is my honor to be the editor-in-chief of IJESD. The journal publishes good papers in the field of environmental science and development.
IJESD 2013 Vol.4(6): 637-642 ISSN: 2010-0264
DOI: 10.7763/IJESD.2013.V4.429

Energy-Saving Effect of a Hybrid Air-Conditioning System Using Natural Ventilation in an Office Building

Tomoya Sakamoto and Yasuyuki Shiraishi
Abstract—The energy-saving effect of a hybrid A/C system during operation phase in springtime was shown quantitatively based on field measurements and numerical simulations. A numerical model of the natural ventilation rate for a building with flow control inlets and outlets was proposed in this study by means of a thermal and air flow network analysis. The prediction accuracy of this model was also verified by performing a comparison with field measurements of a hybrid A/C system in an existing office building. Power consumption for A/C was reduced by about 20% on each floor by introducing natural ventilation, and predicted energy savings for the system was about 22.3% on average.

Index Terms—Natural ventilation, flow control, field measurement, thermal and airflow network analysis.

The authors are with The University of Kitakyushu, Japan (e-mail:;


Cite:Tomoya Sakamoto and Yasuyuki Shiraishi, "Energy-Saving Effect of a Hybrid Air-Conditioning System Using Natural Ventilation in an Office Building," International Journal of Environmental Science and Development vol. 4, no. 6, pp. 637-642, 2013.

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