...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Renewable energy >Performance evaluation of nano-enhanced phase change materials during discharge stage in waste heat recovery
【24h】

Performance evaluation of nano-enhanced phase change materials during discharge stage in waste heat recovery

机译：纳米增强相变材料在余热回收过程中排放阶段的性能评估

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

Waste heat recovery in temperature range of 100 degrees C-150 degrees C based on a novel phase change material (PCM) is numerically investigated. The study is performed using a numerical model accounting phase change, heat transport and convection during the discharge stage in a spherical capsule. High thermal conductivity nanoparticles are added to the base PCM to deal with the issue of low energy discharge. The homogeneous modelling approach is employed to predict the modified thermophysical properties of the Nano-enhanced phase change material (NEPCM) and to capture the effects of nanoparticles on the solidification process and the energy discharge. Cu/Erythritol, Al/Erythritol, TiO2/Erythritol and SiO2/ Erythritol composites are investigated within the limit of 5% nanoparticle volume fraction. Considering discharging time as a critical parameter, 2.5% Cu/Erythritol composite is used and a detailed analysis is presented for thermophysical properties, thermal field, velocity field and solidified fraction field during the discharge process. The compromise between the decrease in storage capacity and the increase in discharge rate is described using a thermal performance analysis. Since the waste heat (industry exhaust and solar energy) is typically available in abundance, it is suggested that the loss of storage capacity is less significant than the obtained benefit of swift discharging operation. (C) 2018 Elsevier Ltd. All rights reserved.
机译：基于新型相变材料（PCM），对100摄氏度至150摄氏度温度范围内的废热回收进行了数值研究。这项研究是使用数值模型进行的，该模型考虑了球形胶囊在排放阶段的相变，传热和对流。将高导热率的纳米颗粒添加到基础PCM中，以解决低能量放电的问题。均质建模方法用于预测纳米增强相变材料（NEPCM）的改进的热物理性质，并捕获纳米颗粒对固化过程和能量释放的影响。铜/赤藓糖醇，铝/赤藓糖醇，TiO2 /赤藓糖醇和SiO2 /赤藓糖醇复合材料的研究在5％的纳米颗粒体积分数的范围内。将放电时间作为关键参数，使用2.5％的铜/赤藓糖醇复合材料，并对放电过程中的热物理性质，热场，速度场和凝固分数场进行了详细分析。使用热性能分析描述了存储容量减少和放电速率增加之间的折衷。由于通常会大量提供废热（工业废气和太阳能），因此建议存储容量的损失不如快速放电操作所获得的收益重要。 （C）2018 Elsevier Ltd.保留所有权利。

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