摘要
为了获得聚光型太阳能热发电用的更低熔点熔融盐储热传热材料,采用材料掺杂改性方法,在Li NO3-KNO3-Ca(NO3)2三元低熔点共晶混合盐中加入Na Cl,制备了Li NO3-KNO3-Ca(NO3)2-Na Cl新混合熔盐。对新混合熔盐分别进行了DSC熔点测定、TG动态热稳定测定、48 h静态热稳定测试和熔盐液态密度测定。DSC实验结果表明,新混合熔盐的熔点为109.3℃,比原三元混合熔盐的熔点(117.2℃)降低了7.9℃,对应的相变潜热为48.6 J/g;TG动态热稳定和静态热稳定实验表明,新混合熔盐的热稳定温度为500℃,比原三元混合熔盐的热稳定温度(450℃)高50℃;液态密度实验发现,该混合熔盐在180~500℃时的液态密度为1.7~1.9g/cm3。
To obtain newly multi-component molten salts with lower melting point used as thermal storage media and heat transfer fluid in concentrating solar power, the reciprocal quinary molten mixture was prepared by adding Na Cl into the ternary eutectic molten mixture of Li NO3-KNO3-Ca（NO3）2. And then, differential scanning calorimeter（DSC） and thermogravimetric analysis（TG）and other thermal test were carried out. The results showed that the melting point of the reciprocal quinary molten mixture is 109.3 ℃ with the latent heat is 48.6 J/g, which is lower 7.9 ℃ than that of the ternary eutectic molten mixture. The thermal stability temperature is 500 ℃, which is higher 50℃ than that of the ternary eutectic molten mixture. And the density of the reciprocal quinary molten mixture is 1.7-1.9 g/cm^3 with the temperature range 180-500 ℃.
作者
徐芳
陈秋燕
王军涛
Xu Fang;Chen Qiuyan;Wang Juntao(School of Nuclear Technology and Chemistry ＆ Biology, Hubei University of Science and Technology, Xianning 437100, China;Hubei Collaboration Innovative Center for Non-power Nuclear Technology, Hubei University of Science and Technology, Xianning 437100, China)
出处
《可再生能源》
CAS
北大核心
2017年第11期1605-1610,共6页
Renewable Energy Resources
基金
湖北科技学院博士启动基金资助项目(BK1518)
湖北省教育厅科学技术研究项目(B2017184)
国家自然科学基金资助项目(21406253)
关键词
太阳能
光热发电
熔盐
储热传热
solar energy
concentrating solar power
molten salt
thermal storage and heat transfer
