Study on temperature-humidity controlling performance of zeolite-based composite and its application for light quality energy-conserving building envelope

Abstract

A composite thermo-hygroscopic material with loose surface, neat and single pore size distribution for lightweight envelope structure was hereby prepared in this paper by compounding inorganic minerals with polymer materials using the sol–gel method. The moisture storage capacity, isothermal humidity control characteristics of this material were studied through static isothermal humidity controlling performance experiments. Besides, its performance in terms of the air temperature, relative humidity, moisture content in the light-weight assembly building (movable panel house), laying thickness, and laying area on the indoor air parameters were studied under the action of outdoor climate conditions and indoor periodic humidity load using the effective humidity penetration thickness model. It was found that under winter conditions, the laying of CHPCMs can moderate the effects of outdoor temperature and humidity load changes on indoor temperature, relative humidity and moisture content, and effectively delay the fluctuation of indoor air parameters. CHPCM exhibits an optimal laying thickness value, and the deviation from the optimal thickness value can weaken its ability to regulate indoor environmental parameters. The average air relative humidity of the naturally ventilated room with a laying area of 24 m2 is about 4.6 % lower than the average air relative humidity with a laying area of 12 m2.