Effect of Quick-dissolving and High-viscosity Carboxymethyl Cellulose Sodium on Properties of Glauber’s Salt-based Composites Phase Change Energy Storage Materials with Different Phase Transition Temperature Gradient
LI Xiuli, TIE Shengnian
New Energy Photovoltaic Industry Research Center,Qinghai University,Xining 810016
Abstract: Selecting four kinds of carboxymethyl cellulose sodium (CMC-Na) with different viscidity properties analyzed them from structure, then choosed the quick-dissolving and high-viscosity CMC-Na as a thickener for three different temperature gradient Glauber’s salt phase change energy storage materials. Determined the best compound ratio of CMC-Na, solved the phase transition energy storage material phase stratification phenomenon effectively. The effects of the amount of instant carboxymethyl cellulose so-dium on the energy storage density, thermal conductivity and undercooling performance of phase change materials were investigated. The results demonstrated that the proportions of CMC-Na were 1.0%,1.0%,0.5%, respectively, three different temperature gra-dient of Glauber’s salt phase change energy storage materials were optimized, the phase transition temperature was 7 ℃,14 ℃ and 22 ℃, respectively, solved the phase stratification phenomenon effectively. The energy storage density, thermal conductivity and undercooling were 102.3 J/g,146.4 J/g,162.5 J/g,0.839 1 W/(m·K),0.984 3 W/(m·K),1.011 5 W/(m·K) and 2.3 ℃,0.5 ℃,0.8 ℃. It was meaningful to improve the service life of Glauber’s salt phase change material.
李秀丽, 铁生年. 速溶高粘羧甲基纤维素钠对不同相变温度梯度芒硝基相变储能材料性能的影响[J]. 材料导报, 2018, 32(22): 3848-3852.
LI Xiuli, TIE Shengnian. Effect of Quick-dissolving and High-viscosity Carboxymethyl Cellulose Sodium on Properties of Glauber’s Salt-based Composites Phase Change Energy Storage Materials with Different Phase Transition Temperature Gradient. Materials Reports, 2018, 32(22): 3848-3852.
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2018, Vol. 32 
