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, Ulrich Periodicals Directory, Electronic Journals Library, Crossref, ProQuest.
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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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