欢迎访问《人工晶体学报》官方网站,今天是 分享到:

人工晶体学报 ›› 2017, Vol. 46 ›› Issue (12): 2374-2379.

• • 上一篇    下一篇

不同载体的Na2SO4·10H2O基定形相变材料的制备和热性能研究

刘磊;彭犇;邱桂博;郭敏;程芳琴;张梅   

  1. 北京科技大学冶金与生态工程学院,北京,100083;中冶建筑研究总院有限公司,北京,100088;山西大学,山西低附加值煤基资源高值利用协同创新中心,太原030006;北京科技大学冶金与生态工程学院,北京 100083;山西大学,山西低附加值煤基资源高值利用协同创新中心,太原030006
  • 出版日期:2017-12-15 发布日期:2021-01-20
  • 基金资助:
    国家自然科学基金(51672025,51572020,51372019);山西省科技支撑计划(MC2016-03)

Preparation and Thermal Properties of Shape-stabilized Na2SO4·10H2O Composite PCM with Different Carriers

LIU Lei;PENG Ben;QIU Gui-bo;GUO Min;CHENG Fang-qin;ZHANG Mei   

  • Online:2017-12-15 Published:2021-01-20

摘要: 基于节能减排的重要性,针对Na2 SO4·10H2 O基相变材料相变过程中液相泄露和长期使用的热稳定性问题,采用直接浸渍的方法将其封装入不同载体(SiO2气凝胶、X型分子筛、膨胀珍珠岩、活性炭和硅藻土)中,成功制备了不同载体的定形相变材料.通过SEM、XRD、DSC等表征方法,测定了饱和吸附时各自的相变材料占比分别为80.0;、82.2;、76.9;、89.2;及60.6;;并且从热性能、机械性能、成本等方面综合对比了不同载体的性能,发现膨胀珍珠岩(EP)是性价比最优的载体材料.进一步对Na2 SO4·10H2 O/EP复合相变材料进行了熔冻循环实验测试,经过100次循环实验,热值损耗保持在15;以内,过冷度稳定在10℃以内,热稳定性良好.

关键词: Na2SO4·10H2O;定形相变材料;膨胀珍珠岩;热稳定性

Abstract: Energy conservation has great significance in today's society.In this paper, Na2SO4 · 10H2O was selected as a phase change material ( PCM ) which was encapsulated into different carriers , such as SiO2 aerogels, X-type molecular sieves, expanded perlite, activated carbon and diatomite by using direct impregnation method for preventing the leakage and guaranteeing the long-term thermal stability during the phase transition .Test results of SEM , DSC and XRD show that the percentage of PCM in the different adsorbents is 80.0;,82.2;,76.9;,89.2; and 60.6; respectively after saturation adsorption . Compared with other carriers the expanded perlite ( EP ) is the most cost-effective carrier material in terms of thermal properties , mechanical properties and cost .The Na2SO4 · 10H2O/EP composite phase change material was further detected for the thermal cycle experiment .After 100 cycles, its calorific value loss is less than 15;, and the undercooling is within 10℃, indicating that the Na2SO4· 10H2O/EP has a good thermal stability .

Key words: Energy conservation has great significance in today's society.In this paper, Na2SO4 · 10H2O was selected as a phase change material ( PCM ) which was encapsulated into different carriers , such as SiO2 aerogels, X-type molecular sieves, expanded perlite, activated carbon and diatomite by using direct impregnation method for preventing the leakage and guaranteeing the long-term thermal stability during the phase transition .Test results of SEM , DSC and XRD show that the percentage of PCM in the different adsorbents is 80.0;,82.2;,76.9;,89.2; and 60.6; respectively after saturation adsorption . Compared with other carriers the expanded perlite ( EP ) is the most cost-effective carrier material in terms of thermal properties , mechanical properties and cost .The Na2SO4 · 10H2O/EP composite phase change material was further detected for the thermal cycle experiment .After 100 cycles, its calorific value loss is less than 15;, and the undercooling is within 10℃, indicating that the Na2SO4· 10H2O/EP has a good thermal stability .

中图分类号: