LI Wei, LIU Fang, CHEN Baoming, et al. Moisture transfer effects on thermo-hydro properties of multilayer wall in cold area[J]. CIESC Journal, 2017, (S1): 162-168.
LI Wei, LIU Fang, CHEN Baoming, et al. Moisture transfer effects on thermo-hydro properties of multilayer wall in cold area[J]. CIESC Journal, 2017, (S1): 162-168.DOI: 10.11949/j.issn.0438-1157.20170558.
The heat and moisture transfer through wall has an important impact on the hygrothermal performance of building envelope
energy consumption and indoor environment. One-dimensional unsteady heat
wet and air coupled transfer (HAM) model of the multilayer wall is founded
with relative humidity and temperature being the driving force in this paper. And the finite element method is used to solve the numerical model. The numerical results show that considering the moisture transfer
the humidity gradient and the rate of mass change due to phase change is high near the internal and exterior surface; moisture would be accumulated in wall
which shorten the service life of the wall; the range of temperature rise is large and the rise rate is high
moisture transfer have great effect on the average Nu of the wall; the heat storage is 1.6 times as much as that of ignoring moisture transfer
and it is not conducive to the building energy efficiency of air conditioning buildings when the calculation is ignoring moisture transfer.