• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>International Journal of Heat and Mass Transfer >Specific heat of metal oxide nanofluids at high concentrations for heat transfer
【24h】

Specific heat of metal oxide nanofluids at high concentrations for heat transfer

机译：高浓度金属氧化物纳米流体的比热

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

In this work isobaric specific heat capacity measurements were performed for five different nanofluid sets designed as dispersions up to 15% mass concentrations of MgO, ZnO and ZrO_2 in pure ethylene glycol as well as ZnO and ZrO_2 in an ethylene glycol + water mixture at 50:50% in volume. Isobaric specific heat capacities for the three dry metallic oxide nanopowders and the two base fluids were also studied with the aim of contributing to elucidate on the heat capacity behavior of nanofluids for heat transfer applications. Measurements were carried out by using a quasi-isothermal Temperature-Modulated Differential Scanning Calorimetry (TMDSC) method in the temperature range from 243.15 to 473.15 K. Base fluid results were compared with literature data to validate the measurement procedure. The specific heats for nano-sized materials here presented were also compared with literature data for bulk-sized of the same metallic oxides. In addition, the experimental values were used to evaluate the goodness of different models existing in literature to predict or correlate the specific heat capacities. A new fitting equation was also proposed to correlate specific heats of nanofluids as a function of the base fluid, nanoparticles as well as nanoparticle concentration.
机译：在这项工作中，对五种不同的纳米流体进行了等压比热容测量，这五种纳米流体设计为在纯乙二醇中的MgO，ZnO和ZrO_2的质量浓度高达15％的分散体以及在乙二醇+水混合物中的ZnO和ZrO_2的质量浓度为50：数量的50％。还研究了三种干燥金属氧化物纳米粉末和两种基础流体的等压比热容，目的是阐明用于传热应用的纳米流体的热容行为。使用准等温温度差示扫描量热法（TMDSC）在243.15至473.15 K的温度范围内进行测量。将基础流体的结果与文献数据进行比较，以验证测量程序。此处介绍的纳米级材料的比热也与相同大小的相同金属氧化物的文献数据进行了比较。另外，实验值被用于评估文献中存在的用于预测或关联比热容的不同模型的优良性。还提出了新的拟合方程，以将纳米流体的比热与基础流体，纳米颗粒以及纳米颗粒浓度的函数相关联。

著录项

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