空間ガス濃度測定によるガス放散量同走法の原理と簡易同走法の精度検討

摘要

In this paper the basic principle of the identification method of gas emission rate based on spatial gas concentration measurement and the simplified method based on one point measurement is explained. And the accuracy of simplified method is examined using CFD analysis. In the result, the following items become clear, (1) the adsorption of emission gas to chamber wall doesn't have affect on accuracy, (2) the acceleration of mixing the emission gas is important, (3)the accuracy of the simplified method based on one point measurement is about 20% , and (4) the difference of accuracy on the measurement point around the center is small.%1．はじめに人々の生活の場では様々な物体から発生するガスが空気質に大きな影響を与えている。室内においては、建材や家電製品、電子機器等から放散される化学物質が問題となっており、沸点の低いホルムアルデヒド類、挿発性有機化合物（Volatile organic compounds：VOCs）等の測定は、日本工業規格（Japanese Industrial Standards：JIS）及び国際標準化機構（International Organization for Standardi－Zation：ISO）に基づいた測定法により精度の良い計測が可能となっている1～10）。