Measurement of Indoor Air Quality for Ventilation with the Existence of Occupants in Schools

摘要

This paper evaluates the performance of ventilation for the removal of indoor pollutants as a function of ventilation rate and the number of occupants in a test room and school classroom. An experimental apparatus consists of a test room, a tracer gas supply system, a gas detector, and a fan for ventilation air supply with a controller. The ventilation performance is evaluated in a step-down method based on ASTM Standard E741-83 using CO{sub}2 gas as a tracer gas in the test room of 35 m{sup}3. For the ventilation air flow rate of 1.0 ACH, a recommended ventilation flow rate of Korea school standard for acceptable indoor air quality in the case of one person, CO{sub}2 gas concentration decreases up to 55% within 50 minutes without occupancy and increases up to 75% in the case of one occupant Also indoor air quality at the school classroom is investigated experimentally.