TY - JOUR
TI - Thermal energy modelling system for green energy application of exterior wall under smart home building
AU - Hu Jun
JN - Thermal Science
PY - 2023
VL - 27
IS - 2
SP - 1151
EP - 1158
PT - Article
AB - In order to solve the problem of poor heat storage capacity of traditional  thermal insulation materials, the author proposed a building thermal  simulation study of PCM wall under smart home buildings. The author chose  urea-formaldehyde resin microcapsule with 60% mass fraction of paraffin as  the research object, and gave the structure of the study wall. After  determining the physical parameters of PCM, the phase change wall is  simulated and analyzed, and the simulation results are compared with the  experimental results used to verify the accuracy of the model. The internal  temperature of phase change wall and reference wall, and the internal and  external wall temperature of four-way wall were compared and analyzed by  using the simulation results. The results show that the internal wall  temperature of the reference wall in four directions increased with time  after the 54th hour, reached the peak temperature at the 65th hour, and then  the internal wall temperature decreased with time, however, the internal  wall temperature in four directions began to rise with time after the 56th  hour of phase transition wall, and decreased with time after the 70th hour,  this indicates that there is always hysteresis of temperature rise/fall in  the inner wall of PCM wall, indicating the thermal inertness of PCM heat  transfer. The changes of exterior wall temperature are similar to that of  exte­rior wall temperature. With the increase/decrease of outdoor  temperature, exterior wall temperature increases/decreases. However, the PCM  exterior wall temperature curve is higher than the reference wall (ordinary  gypsum layer) inside the wall temperature curve, indicating that the PCM  exterior wall temperature is higher than the reference wall exterior wall  temperature. The heat transfer between inside and outside walls of building  is consistent with the outdoor temperature, but the heat transfer speed of  phase change wall is slow due to the heat storage function, which proves  that PCM in the structure is thermal inert and capable of heat stor­age.