—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.
—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.