本文選題：相變墻體 + 傳熱性能�。� 參考：《新型建筑材料》2014年11期

【摘要】：選用石蠟與液態(tài)石蠟的二元混合物作為相變材料,按不同比例復(fù)合在墻體中,制成被動(dòng)式蓄熱相變墻體。實(shí)驗(yàn)分析了不同比例相變材料復(fù)合相變墻體的傳熱性能和節(jié)能效果,并與普通墻體進(jìn)行比較,優(yōu)選出相變材料最適合的復(fù)合比例。結(jié)果顯示:在加熱階段,不同比例相變材料制備的相變墻體表面溫度和熱流均小于普通墻體,且溫度和熱流變化平緩、波動(dòng)小,存在延遲和衰減現(xiàn)象;在停止加熱階段,普通墻體的溫度和熱流很快下降,而相變墻體表面溫度和熱流下降較為緩慢。試驗(yàn)數(shù)據(jù)為相變墻體的實(shí)際應(yīng)用提供基礎(chǔ)和依據(jù)。
[Abstract]:The binary mixture of paraffin and liquid paraffin is used as phase change material, and the passive heat storage phase change wall is made in different proportion.The heat transfer performance and energy saving effect of the composite phase change wall with different proportions of phase change materials are analyzed experimentally, and the optimum composite proportion of the phase change material is selected by comparing with the ordinary wall.The results show that in the heating stage, the surface temperature and heat flux of the phase change wall prepared with different proportions of phase change materials are lower than that of the ordinary wall, and the change of temperature and heat flux is gentle, the fluctuation is small, the phenomenon of delay and attenuation exists, and at the stage of stopping heating,The temperature and heat flux of ordinary wall decrease quickly, but the surface temperature and heat flux of phase change wall decrease slowly.The experimental data provide the foundation and basis for the practical application of phase change wall.
【作者單位】： 北京建筑大學(xué)環(huán)境與能源工程學(xué)院北京市供熱供燃?xì)馔L(fēng)及空調(diào)工程重點(diǎn)實(shí)驗(yàn)室;
【基金】：北京市自然科學(xué)基金項(xiàng)目(3122012)
【分類號(hào)】：TU111.4

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