LONG-TERM INDOOR VOCs CONCENTRATION PREDICTION CONSIDERING TEMPERATURE CHANGES PART 2 COMPARISONS BETWEEN PREDICTION AND EXPERIMENTAL VALUES

The previous paper (Part 1) proposed the concept of "equivalent material age" that uses the Arrheniusrelation and explained a method for long-term prediction of indoor volatile organic compound (VOC)concentration considering temperature dependence. This paper first describes the experimentconducted to validate the long-term concentration formula and the results of the experiment and reportson a comparison of the measured values obtained with the predicted values. The experiment wasconducted by a method conforming to JIS A1901:2003. The material measured was formaldehyde. Inthe experiment, measurement was made in five cases involving different conditions. The measuredchanges over time in the emission factor obtained in the experiment in which temperature was variedover time tended to agree fairly with the predicted values, but differences began to appear at a certainpoint in the experiment. A likely reason for the occurrence of the differences was the influence ofdifferences between individual materials (members). It is thought that if prediction accuracy is to beimproved, it is necessary to use more than one test specimen for each experiment. The authors intendto investigate the influence of differences among individual specimens in order to enhance predictionaccuracy.