Experimental study on the thermal insulation application of phase-change plasterboard enclosure structure
To study the heat storage performance of the phase-change plasterboard enclosure structure during the transition season,two experimental comparison rooms of the same size were built,the phase-change plasterboard was affixed to the inner side of the enclosure structure to test the indoor temperature and wall temperature of the experimental comparison rooms under various working conditions,and its applicability in the transition season was discussed through the thermal performance analysis of the rooms.To prepare the phase-change micro-capsules in the plasterboard,paraffin(n-octadecane)was used as the core material,and polymethyl methacrylate(PMMA)as the wall material,with the phase-change temperature being 28 ℃ and phase-change latent heat being 180 kJ/kg.Under the same outdoor climate conditions,a month of multi-group experimental research was carried out.The variation rules of the indoor air temperature and wall surface temperature were tested,and the indoor thermal environment was compared with that of ordinary rooms.The results show that the performance of the phase-change plasterboard is stable.When it is applied in Hangzhou during the transition season,the maximum indoor peak temperature can be reduced by 1.10 ℃,the wall temperature fluctuation can be reduced by 1.18 ℃,the peak delay time can reach 40 min,and the indoor temperature discomfort can be reduced by 6.82 ℃·h/d,which effectively alleviates the indoor temperature fluctuation and enhances the thermal inertia of the enclosure structure.In addition,compared to natural ventilation at night,the phase-change enclosure structure combined with night ventilation can reduce the indoor discomfort time by about 2 hours,reduce the cumulative indoor temperature discomfort by 2.08 ℃·h/d,and effectively improve indoor thermal comfort.This study verifies the thermal insulation effect of the phase-change plasterboard applied to the enclosure structure through comparative experiments,which can provide reference for subsequent simulation research.
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