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首页> 外文期刊>Journal of enhanced heat transfer >USING ORGANIC PHASE-CHANGE MATERIALS FOR ENHANCED ENERGY STORAGE IN WATER HEATERS: AN EXPERIMENTAL STUDY
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USING ORGANIC PHASE-CHANGE MATERIALS FOR ENHANCED ENERGY STORAGE IN WATER HEATERS: AN EXPERIMENTAL STUDY

机译：使用有机相变材料增强热水器中的能量存储：一项实验研究

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摘要

Organic phase-change material for enhanced energy storage was prepared by adding SiO2 particles in a certain proportion into molten palmitic acid (PA) with stirring and intensive sonication at a constant temperature. The thermal properties of the SiO2/PA composite were experimentally characterized. As compared with pure PA, the latent heat capacity of the composite with the addition of 3 wt% SiO2 particles is increased by 51.7 kJ/kg, reaching 214.7 kJ/kg, which is the highest value among the composites tested with varying SiO2 ratio from 1 to 5 wt%; the thermal conductivity of the 3 wt% SiO2/PA composite is also increased by 12% at 30 degrees C (solid state) and 7% at 70 degrees C (liquid state), respectively. A water heater was built and tested with embedded capsules containing the 3 wt% SiO2/PA composite and pure PA, respectively. The lab-built phase-change water heater is much smaller in size than an ordinary household water heater in comparison and uses reduced electrical power. However, it responds faster and has a larger volume ratio of hot water output to water heater size. During the turning-off test, the water heater with 3 wt% SiO2/PA can provide 2.23 times hot water volume of heater size; while the ordinary water heater can only provide 1.41 times hot water volume of tank size.
机译：通过将一定比例的SiO2颗粒添加到熔融的棕榈酸（PA）中，并在恒定温度下搅拌和强力超声处理，来制备用于增强能量存储的有机相变材料。对SiO2 / PA复合材料的热性能进行了实验表征。与纯PA相比，添加3 wt％SiO2颗粒的复合材料的潜热容量提高了51.7 kJ / kg，达到214.7 kJ / kg，这是在SiO2比例变化的情况下测试的复合材料中的最高值1至5重量％； 3 wt％SiO2 / PA复合材料的热导率在30摄氏度（固态）下也分别提高了12％，在70摄氏度（液态）下提高了7％。建造热水器并用分别包含3 wt％SiO2 / PA复合材料和纯PA的嵌入式胶囊进行测试。与之相比，实验室制造的相变热水器在尺寸上要比普通家用热水器小得多，并且使用的电能更低。但是，它的响应速度更快，并且热水输出与热水器尺寸的体积比更大。在关机测试中，SiO2 / PA含量为3 wt％的热水器可提供的热水量为热水器尺寸的2.23倍；而普通的热水器只能提供1.41倍于水箱大小的热水量。

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  • 来源
    《Journal of enhanced heat transfer》 |2019年第2期|167-178|共12页
  • 作者

    Wang Jifen; Xie Huaqing; Guo Zhixiong; Cai Le; Zhang Kai;

  • 作者单位

    Shanghai Polytech Univ, Coll Art & Sci, Sch Sci, 2360 Jinhai Rd, Shanghai 201209, Peoples R China|Shanghai Polytech Univ, Res Ctr Resource Recycling Sci & Engn, Shanghai 201209, Peoples R China;

    Shanghai Polytech Univ, Coll Art & Sci, Sch Sci, 2360 Jinhai Rd, Shanghai 201209, Peoples R China;

    Rutgers State Univ, Dept Mech & Aerosp Engn, Piscataway, NJ 08854 USA;

    Shanghai Polytech Univ, Coll Art & Sci, Sch Sci, 2360 Jinhai Rd, Shanghai 201209, Peoples R China|Shanghai Polytech Univ, Res Ctr Resource Recycling Sci & Engn, Shanghai 201209, Peoples R China;

    Shanghai Polytech Univ, Coll Art & Sci, Sch Sci, 2360 Jinhai Rd, Shanghai 201209, Peoples R China|Shanghai Polytech Univ, Res Ctr Resource Recycling Sci & Engn, Shanghai 201209, Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    energy storage enhancement; organic phase-change material; latent heat; composite; water heater;

    机译：储能增强;有机相变材料;潜热;复合材料;热水器;

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