Paper 6: Volume 4 No.2 September 2005 Edition
Evaluation
of the Ventilation Performance of Apartment
Buildings in Winter for a Severe
Cold Region of
China
Jing Liu1, Fusheng Gao1, Hiroshi Yoshino2
and Zhenhai Li3
1
School of Municipal and Environmental Engineering, Harbin Institute of
Technology, P.R.China
2 Tohoku University,
Sendai
,
Japan
3 Tongji University,
Shanghai
,
China
Abstract
The purpose of this research was to assess the performance of air
infiltration or naturally driven ventilation, the corresponding energy
consumption and indoor contaminant level for residential buildings in
Harbin
, a typical city in the severe cold region of
China
. Based on questionnaire surveys and field measurements, a prototypical
apartment building was determined. Then, unsteady-state numerical
simulations were carried out by the use of COMIS. A parametric study on
ventilation performance was undertaken based on applying various
air-tightness levels. These results showed that infiltration alone resulted in
under-ventilation and an
imbalance in air distribution.
It also resulted in a risk of high concentrations of indoor contaminants. To overcome
the shortcomings of infiltration alone, a mechanical balanced system,
incorporating a heat exchanger, was developed. This approach was shown to
offer much improved control over ventilation compared with infiltration
alone.
Key words: air
infiltration, apartment building, COMIS multizone model, severe climate,
balanced ventilation, heat recovery, indoor climate surveys, occupancy
schedule, airtightness measurements.
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