The Simulation Research On Indoor Concentration Of Formaldehyde And Loading Rate Of Wood-based Panels

In recent years,wood-based panels have become one of the main materials for modern furniture production,because of the sharp decline of forest resources and the progress of wood-based panel technology.With the improvement of people'sliving standards,the simple decoration of the interior has been unable to meet the needs of modern people and "knee on decoration" become a social phenomenon,which is becoming more and more extensive about all kinds of wood-based panels applied in the interior.However,it will spread harmful chemicals gas,including formaldehyde,benzene,ammonia and TVOC etc in use,among which formaldehyde pollution is the most serious.Paper studied the influence of the loading rate of the wood-based panel on the indoor formaldehyde concentration distribution which is an important factor affecting the formaldehyde diffusion in the furniture.According to the different size of the room space,it is the purpose to determine the maximum loading rate of the wood-based panel which can be accommodated in the residence.This paper mainly studies the problem by using CFD technology.First,the feasibility of Airpak software need to be verified by comparing the simulated data with the experimental data.Then,a numerical simulation of the indoor formaldehyde diffusion in different wind speeds(lm/s,2m/s,3m/s)and different temperatures(10?,20?,30?)was used to study the indoor formaldehyde diffusion of a residential kitchen which carries out qualitative and quantitative analysis.The results showed that the indoor formaldehyde concentration increases with the increase of the loading rate;under the condition that the formaldehyde concentration in the living room was not higher than 0.08 mg/m3,the maximum loading rate that can be accommodated in the room increased with the increase of the window speed;under the ambient temperature was 20? and the relative humidity was 50%,when the wind speed of the window is lm/s,the maximum loading rate(El grade artificial board)is about 0.46 m2/m3;when the window wind speed is 2m/s,the maximum loading rate is 0.9 m2/m3;when the window wind speed is 3m/s,the maximum loading rate is about 1.4 m2/m3;and when the wind speed is increased by 0.1 m/s,the average formaldehyde concentration in the room is reduced by an average of 0.0056 mg/m3.the maximum loading rate in the room can be reduced with the increase of temperature;the maximum loading rate of the room can be around 1 m2/m3 when the ambient temperature is 10?;and the maximum loading rate is about 0.9 m2/m3,when the ambient temperature is 20?;and the maximum loading rate is about 0.5 m2/m3,when the ambient temperature is 30?;when the ambient temperature is between 10? and 20?,the average formaldehyde concentration in the room increases by an average of 0.0016 mg/m3 with per 1? increasing;when the ambient temperature is 20°C,the average formaldehyde concentration in the room increases by an average of 0.0035 mg/m3 with per 1? increasing.The above conclusions provide a theoretical basis for the research of loading rate of wood-based panels.In real life,in order to prevent and reduce the harm of formaldehyde to the human body,consumers and designers should consider the indoor space layout and local climate conditions for the number of wood-based panels required for different houses.