Estimation Method of Emission Rate and Effective Diffusion Coefficient using Micro Cell

In this report, we proposed the estimation method of building material properties by usingboth numerical analysis and measuring the time history of concentration in micro cell, andshowed that the effective diffusion coefficient, emission rate and initial concentration in thebuilding material is provided with a single measurement. The effective diffusion coefficientof testing building materials were estimated to be from about 4.010-10 to 2.510-8 [m2/s] inthis proposed method. Although this proposed method is necessary to improve to obtain morereliable result, it is able to apply to relative comparison about VOCs emission characteristic inbuilding materials as a screening test.