STUDY ON COUPLED HEAT AND FORMALDEHYDE MIGRATION PROPERTIES IN POROUS BUILDING MATIRIALS
Based on the non-equilibrium thermodynamic theory and molecule movement theory, the thermal driving forces and the fluxes in heat and formaldehyde migration process for dried porous building materials are analyzed. The mechanisms of heat and formaldehyde migration in dried porous building materials are discussed and the phenomenological equations to describe the immigrating process in dried porous building materials are established. By means of the diffusion law and the equation of state for ideal gas, the expressions of coefficients in the phenomenological equations are deduced. The effects of temperature, partial pressure of formaldehyde on the phenomenological coefficients are also simulated. The simulated results show that the effects of temperature on formaldehyde migration properties are obvious.
Formaldehyde migration Temperature Porous building materials
Zhengxian Liu Zhenqian Chen
School of Energy and Environment, Southeast University, Nanjing, 210096, China
国际会议
北京
英文
2007-09-07（万方平台首次上网日期，不代表论文的发表时间）