• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Energy Conversion & Management >A new kind of shape-stabilized PCMs with positive temperature coefficient (PTC) effect
【24h】

A new kind of shape-stabilized PCMs with positive temperature coefficient (PTC) effect

机译：具有正温度系数（PTC）效应的新型形状稳定PCM

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

A new kind of shape-stabilized phase change materials (PCMs) with positive temperature coefficient (PTC) effect was prepared in this paper. The materials were prepared by adding graphite powder (GP) to the paraffin/low density polyethylene (LDPE) composite and the PTC characteristic was found by adjusting the component ratio of the material. Then the physical structures and thermal properties of the materials were investigated and the effect of various GP mass fractions and paraffin/LDPE mass proportions on the PTC behavior of the materials was studied experimentally. The results showed that the switching temperature of the materials was about 25 ℃ (room temperature) which approached to the first phase change temperature of paraffin dispersed in the materials. The PTC behavior of the materials was the best when the GP mass fraction and the mass proportion of LDPE/paraffin were 40 wt% and 30:70, respectively. Furthermore, the negative temperature coefficient (NTC) effect of the materials could be eliminated effectively with heat treatment. This new kind of materials is different from the former PTC materials which the switching temperatures focus on high temperature ranges. It makes up for the defect of previous materials that the switching temperatures only range in high temperature rather than room temperature and provides a potential means for the thermal control of the electronic devices or other room temperature thermal control applications.
机译：本文制备了一种新型的具有正温度系数（PTC）效应的形状稳定相变材料（PCM）。通过将石墨粉（GP）添加到石蜡/低密度聚乙烯（LDPE）复合材料中来制备材料，并通过调整材料的组分比来获得PTC特性。然后研究了材料的物理结构和热性能，并实验研究了各种GP质量分数和石蜡/ LDPE质量比对材料PTC性能的影响。结果表明，材料的转换温度约为25℃（室温），接近分散在材料中的石蜡的第一相变温度。当GP质量分数和LDPE /石蜡的质量比例分别为40 wt％和30:70时，材料的PTC性能最佳。此外，通过热处理可以有效消除材料的负温度系数（NTC）效应。这种新型材料与以前的PTC材料不同，后者的开关温度集中在高温范围内。弥补了先前材料的缺陷，即开关温度仅在高温而不是室温范围内变化，并为电子设备的热控制或其他室温热控制应用提供了一种潜在的手段。

著录项

  • 来源
    《Energy Conversion & Management》 |2014年第3期|470-476|共7页
  • 作者

    Wen-long Cheng; Wan-fan Wu; Jia-liang Song; Yi Liu; Shuai Yuan; Na Liu;

  • 作者单位

    Department of Thermal Science and Energy Engineering, University of Science and Technology of China, Hefei 230027, China;

    Department of Thermal Science and Energy Engineering, University of Science and Technology of China, Hefei 230027, China;

    Department of Thermal Science and Energy Engineering, University of Science and Technology of China, Hefei 230027, China;

    Department of Thermal Science and Energy Engineering, University of Science and Technology of China, Hefei 230027, China;

    Department of Thermal Science and Energy Engineering, University of Science and Technology of China, Hefei 230027, China;

    Department of Thermal Science and Energy Engineering, University of Science and Technology of China, Hefei 230027, China,Beijing Institute of Space Long March Vehicle, Beijing 100076, 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

    Shape-stabilized PCMs; Positive temperature coefficient; Switching temperature; PTC behavior; Thermal control;

    机译：形状稳定的PCM;正温度系数;开关温度;PTC行为;热控制;

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号