Research on Ventilation Plan of Summer in Kangding

Indoor thermal environment in kangding was tested on a typical day of summer, it was found that due to outdoor severe cold environment conditions, even in summer 66.4percent of local residents used heating equipments to keep warm with doors and windows closed, thus causing unhealthy indoor air quality (IAQ). So with a local typical apartment as an example, the air changes under the condition of local window tightness was calculated. Results showed that when the doors and windows were closed, indoor air changes was mostly between 0.13-1∼0.24 h-1, far from required 0.5 h-1 of relevant standard specification. Proper ventilation was an effective measure to improve IAQ. Therefore the required ventilation time with different opening areas was calculated. Results showed that required ventilation time was respectively 5.42∼24.30mins with full opening areas, 15.89∼49.09mins with opening scale of 1/2 and 31.30∼100.22mins with opening scale of 1/4. And proper period of ventilation time which was affected by local residents’ living habits, rooms’ function, outdoor environment conditions and the required ventilation time was discussed.