Hot Box Experimental System Design for Dynamic Photothermal Performance Testing of Adaptive Phase-change Glass
To study the synergistic photothermal benefits of transparent envelopes,a combination of traditional standard hot box experiments and field tests was employed. A hot box experimental system suitable for testing the photothermal performance of transparent envelopes was designed to test the photothermal adaptive characteristics of phase change glass. Testing results show that the daily solar radiation heat gains of phase change glass coupled with phase change materials at 28 ℃ and 20 ℃ are only 57. 5％ and 86. 1％ of that of ordinary double-glazed glass,respectively,and the peak surface temperatures reduce by 12. 1 ℃ and 6. 8 ℃,respectively. The phase change glass coupled with the 28 ℃ phase change material has stronger "peak shaving"and "peak shifting"effects,with a temperature time lag of 55 min and a decrement factor of 0. 664. Compared with traditional experimental methods,the designed hot box experimental system can more comprehensively reflect the dynamic photothermal characteristics of phase change glass.
building energy efficiencybuilding envelopehot box methodphase-change glassexperimental system
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