개별 마감재의 유효확산계수를 이용한 복층마감 후의 VOCs방출량 예측에 관한 연구

Abstract

The purpose of this research is to predict VOCs emission rates from multi-layers materials, which are composed of single-layer materials having various VOCs emission rates, by using effective diffusion coefficients of the single-layer materials. Cup method was used for measuring effective diffusion coefficients of three VOCs, such as toluene, ethylbenzene and decane, in seven single-layer materials and two multi-layer materials. The effective diffusion coefficients of three VOCs are estimated from 0.310-12 to 697.810-12[m2/sec], and they are decreased according to molecular weight of the diffused compounds in the single-layer materials. Resistance values, [sec/m] of mass transfer rate of the multi-layer materials, which are calculated from the analogy of mass transfer rate and electric charge, show good fit for the measured values from the cup method. From the simulation and the measurements, it is found that TVOCs emission rates from multi-layer materials can be predicted using the effective diffusion coefficients and initial concentrations of each single-layer materials through numerical methods.