本文選題：相變材料 + 過冷度��； 參考：《低溫與超導(dǎo)》2017年10期

【摘要】：選取CaCl_2·6H_2O相變材料為研究對象,通過實(shí)驗(yàn)對相變材料的制備過程進(jìn)行了優(yōu)化改進(jìn),得到CaCl_2·6H_2O相變材料質(zhì)量配比為43.39%H_2O+45.76%Ca Cl2+8.15%Sr Cl2·6H_2O+2.7%CMC,材料蓄放熱穩(wěn)定,無過冷度,無明顯相分離現(xiàn)象,測得相變溫度為28.6℃,相變潛熱為169.5k J/kg。最優(yōu)例材料經(jīng)過100次循環(huán)穩(wěn)定性測試后,相變溫度降低了0.8℃,出現(xiàn)1.4℃的過冷度,但仍表現(xiàn)出良好的熱穩(wěn)定性。實(shí)驗(yàn)發(fā)現(xiàn)納米粒子的添加對材料的導(dǎo)熱性能有顯著的提高,且當(dāng)4種納米粒子的質(zhì)量百分?jǐn)?shù)均為0.2%時,復(fù)合材料的導(dǎo)熱系數(shù)大小依次為MWCNTCuAl_2O_3TiO_2,其中添加MWCNT的導(dǎo)熱系數(shù)達(dá)到0.7480W/(m·K),比原材料導(dǎo)熱系數(shù)提高了31.5%。
[Abstract]:The CaCl_2 6H_2O phase change material was selected as the research object, and the preparation process of the phase change material was optimized and improved by experiments. The mass ratio of CaCl_2 6H_2O phase change material was 43.39%H_2O 45.76 Cl2 8.15%Sr Cl2 6H_2O 2.7 CMC, and the material had stable heat storage, no undercooling and no obvious phase separation phenomenon.The phase transition temperature is 28.6 鈩，

本文編號：1742606