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Preparation and Thermal Properties of High-Purified Molten Nitrate Salt Materials with Heat Transfer and Storage

机译:传热蓄热高纯硝酸盐熔盐材料的制备及热性能

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摘要

This paper focuses on thermal stability of molten salts, operating temperature range and latent heat of molten salts at a high temperature. In this experiment, multi-component molten salts (purified Solar Salt) composed of purified NaNO_3 and purified KNO_3 were prepared by statical mixing method. Compared with unpurified Solar Salt, purified Solar Salt had a higher thermal stability. The optimal temperature would be increased from 500℃ to 550℃, and the upper limitation temperature increases from 577.5℃ to 593.7℃. Meanwhile, thermal stability and thermal cycling analysis showed the purified Solar Salt had a lower melting point and the deterioration time of molten salts was reduced. The melting point of purified Solar Salt decreases sharply to 223.8℃ and the latent heat increases from 74.39 J/g to 80.79 J/g. Besides, the XRD and chemical analysis test indicated that the degree of degradation reduced and the thermal storage efficiency of purified Solar Salt was improved.
机译:本文着重于熔融盐的热稳定性,工作温度范围和高温下熔融盐的潜热。在本实验中,通过静态混合法制备了由纯净的NaNO_3和纯净的KNO_3组成的多组分熔融盐(纯净的太阳盐)。与未纯化的太阳盐相比,纯化的太阳盐具有更高的热稳定性。最佳温度将从500℃提高到550℃,上限温度从577.5℃增加到593.7℃。同时,热稳定性和热循环分析表明,纯化的太阳盐熔点较低,熔融盐的降解时间减少。纯化的太阳盐的熔点急剧降低至223.8℃,潜热从74.39 J / g增加至80.79 J / g。另外,XRD和化学分析试验表明,降解程度降低,提纯的太阳盐的储热效率提高。

著录项

  • 来源
    《High temperature materials and processes》 |2015年第8期|839-846|共8页
  • 作者单位

    Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining, 810008, China University of Chinese Academy of Sciences, Beijing 100049, China;

    Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining, 810008, China Key Laboratory of Salt Lake Resources and Chemistry, Chinese Academy of Sciences, Qinghai 810008, China;

    Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining, 810008, China Key Laboratory of Salt Lake Resources and Chemistry, Chinese Academy of Sciences, Qinghai 810008, China;

    Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining, 810008, China Key Laboratory of Salt Lake Resources and Chemistry, Chinese Academy of Sciences, Qinghai 810008, China;

    Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining, 810008, China Key Laboratory of Salt Lake Resources and Chemistry, Chinese Academy of Sciences, Qinghai 810008, China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    solar energy materials; purification; thermal properties; Molten nitrate salts;

    机译:太阳能材料;纯化;热性能;硝酸盐熔盐;

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