PROPOSAL FOR CONTROL METHOD OF AIR QUALITY IN THE NEW CONSTRUCTED HOUSES BASED ON THE EMISSION RATE OF ODOR

Study on the measurement and evaluation methods for the perceived air quality in the new constructed buildings by the electronic nose Part 2

Abstract

 This paper is the second report of research aiming to establish the method of evaluation and measurement of the new constructed building odor based on electronic nose analysis.

 In the previous report, the cause of the new constructed building odor was the floor part where the construction area was smaller than the wall and ceiling part. Therefore, the authors thought it necessary to understand the size of the emission rate of odor.

 If the emission rate of odor is known, the new constructed building odor may be suppressed by limiting the area of use of building materials that have a high rate of emission. For example, like formaldehyde in Building Standard Act.

 This paper reports the results of a study on the control method of the new constructed building odor based on the emission rate of odor. In the first stage of the research, a method of estimating the emission rate of odor from the mass balance equation was examined with reference to the formaldehyde method (HBF equation). Secondly, a method of identifying the building materials that have a large impact on the new constructed building odor based on the emission rate of odor was examined. Finally, the validity of the proposed method was verified from the measurement results of odor similarity and VOCs concentration.

 

 The following results were obtained.

 1. The emission rate of odor can be measured in the same way as formaldehyde. Furthermore, the emission rate of odor can be estimated at any N / L value.

 2. The estimation results of the odor emission rate were highly accurate. In addition, the estimation results of the amount of odor emission when the N / L value is approximately 2 or less is highly accurate. However, the estimation results when the N / L value is large has a large error.

 3. The cause site of the new constructed building odor estimated from the emission rate of odor was in agree with the measurement results of odor similarity and VOCs concentration.

 

 Based on the above findings, a method of identifying the building materials that have a large impact on the new constructed building odor based on the emission rate of odor was confirmed to be valid.