Experimental Study on the Influence of a Ventilated Window for Indoor Air Quality and Indoor Thermal Environment

Indoor air quality has attracted more and more attention nowadays. Researches on the atmospheric haze occurred frequently in China show that the ventilated window has a great potential in improving indoor air quality. Experimental study on the effect of indoor air quality, indoor thermal environment and whole energy consumption of the test room, which are all tested under summer conditions. The results show that operating the ventilated window can filter PM2.5 and reduce the indoor concentration of CO2; While outdoor and indoor air PM2.5 concentration are about 100-300ug/m3 and 40-130ug/m3, respectively, indoor air PM2.5 concentration will decrease 25% at most in an hour, it is suitable for running ventilated window; While outdoor air PM2.5 concentration is 300-600ug/m3 and indoor air PM2.5 concentration is less than 130ug/m3, the indoor air PM2.5 concentration will increase 90%∼128%, so the ventilation window should be shut down; Operating the ventilated window one hour indoor CO2 concentration is reduced 46% at most, compared with that the ventilated window is shut down; Under summer conditions, operating the ventilated window has little influence on head-foot temperature difference and indoor thermal comfort; When a ventilated window runs 24 hours continuously, its power consumption is very low, and the overall consumption is smaller compared with the ventilated window is closed, and the energy consumption increases by 14% or so. Therefore the appropriate operation methods and time of ventilated windows need to be set to reduce energy consumption.