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Abstract
The adverse effects of formaldehyde on the indoor air quality is of serious concern. An experimental apparatus is fabricated to investigate the features of formaldehyde migration from dry porous building materials under non-isothermal conditions. The coupled heat and formaldehyde migration process in an ordinary particle board is investigated in both floor heating system and air circulation system. The instantaneous concentration of formaldehyde in the chamber, the instantaneous temperature of the air, and the instantaneous temperature of the top surface of the board is studied. The temperature of the bottom surface of the board is maintained at 15°C throughout the process. As shown in the experimental process, the equilibrium concentration of formaldehyde increases with an increase in the temperature of air. The equilibrium concentration in an airtight chamber having floor heating system is higher than that in an air circulation heating system. The experimental results validated proposed model. Therefore, it is necessary to improve the ventilation of the rooms using such systems.
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