Experimental study of assessing measuring procedure for ventilation effectiveness in mixing ventilation

Abstract

CO2 tracer gas decay tests were conducted in test chamber to assess the procedure of evaluating air change effectiveness in the current standard. Age of air in the test room was simultaneously measured at 18 locations. The results showed that most of the variances in the test space were less than or equal to 16%. It was considered that one could acquire relatively reliable computation with the reduced number of measuring points. In addition, the correlation of thermal effectiveness and air change effectiveness was proposed as a possible alternative to evaluate air change effectiveness in all air mixing ventilation.