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首页> 外文期刊>Journal of Energy Storage >Thermal storage using sand saturated by thermal-conductive fluid and comparison with the use of concrete
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Thermal storage using sand saturated by thermal-conductive fluid and comparison with the use of concrete

机译：使用导热流体饱和的沙子进行蓄热，并与混凝土进行比较

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摘要

The present study considers sand saturated with thermal conductive fluid as a new low-cost thermal storage material that can have better heat transfer than using concrete or sand alone and also avoids issues of heat transfer degradation associated with the mismatch of thermal expansion in concrete. The new thermal storage material (sand saturated with Xceltherm~® 600 heat transfer oil) was tested in a lab-scale experimental setup from 27 °C to 55 °C to show the concept and also validate a 1D transient enthalpy-based model for simulation of thermal storage. The model was then applied to study and compare the thermal storage performance of sand saturated by Hitec~® (heat transfer fluid) and concrete for a 600MW_(ele) CSP power plant at a thermal efficiency of 35% and thermal storage temperatures ranging from 400 °C and 500 °C. It was found that more energy can be stored and extracted if Hitec~®-saturated sand is used as storage media, which may result in appreciable cost reduction than using concrete thermal storage system based on a study for a 600 MW_(ele) CSP system in operation for one year. As a result, Hitec~®-saturated sand can be used to replace concrete as the thermal storage media in high temperature operating range (>400 °C). It is expected that such a new approach of sensible heat storage is of significance to solar thermal energy storage technologies.
机译：本研究认为，用导热液饱和的沙子是一种新型的低成本储热材料，其热传递性能优于单独使用混凝土或单独使用沙子，并且还避免了与混凝土热膨胀失配有关的热传递降解问题。新的储热材料（用Xceltherm〜®600导热油饱和的沙）在27°C至55°C的实验室规模的实验装置中进行了测试，以证明这一概念并验证了基于一维瞬变焓的模型进行仿真蓄热。然后将该模型用于研究和比较600MW_（ele）CSP发电厂的Hitec〜®（传热流体）和混凝土所饱和的砂子的蓄热性能，热效率为35％，蓄热温度为400℃ °C和500°C。研究发现，如果使用Hitec〜®饱和砂土作为存储介质，则可以存储和提取更多的能量，与基于600 MW_（ele）CSP系统的混凝土热存储系统相比，与使用混凝土热存储系统相比，可以节省大量成本运营一年。因此，Hitec〜®饱和砂可以在高温工作范围（> 400°C）中代替混凝土作为储热介质。期望这种显热存储的新方法对于太阳能热存储技术具有重要意义。

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  • 来源
    《Journal of Energy Storage》 |2017年第10期|85-95|共11页
  • 作者

    Xu Ben; Han Jingxiao; Kumar Anurag; Li Peiwen; Yang Yongping;

  • 作者单位

    The University of Arizona, Department of Aerospace and Mechanical Engineering, Tucson, AZ, United States,Department of Mechanical Engineering, The University of Texas Rio Grande Valley, Edinburg, TX, United States;

    The University of Arizona, Department of Aerospace and Mechanical Engineering, Tucson, AZ, United States,School of Energy, Power and Mechanical Engineering, North China Electric Power University, Beijing, China;

    The University of Arizona, Department of Aerospace and Mechanical Engineering, Tucson, AZ, United States;

    The University of Arizona, Department of Aerospace and Mechanical Engineering, Tucson, AZ, United States;

    School of Energy, Power and Mechanical Engineering, North China Electric Power University, Beijing, China;

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  • 正文语种 eng
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  • 关键词

    Comparison; Concentrated solar power (CSP); Concrete; Sand saturated by thermal conductive fluid; Thermal energy storage (TES);

    机译：比较;集中式太阳能（CSP）;具体;沙子被导热液浸透;热能储存（TES）;

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