• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Heat Transfer >Cross-Flow Heat Exchanger: Volume-Averaging Formulation of a Unit Cell Model and Thermal Performance Analysis
【24h】

Cross-Flow Heat Exchanger: Volume-Averaging Formulation of a Unit Cell Model and Thermal Performance Analysis

机译：错流换热器：晶胞模型的体积平均公式和热性能分析

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 formulation of the unit cell model and the corresponding thermal performance analysis for the cross-flow heat exchanger are carried out, with the design goal of dissipating 175 W from a high-power electronic chip in a compact space. A liquid to liquid heat exchanger in the cross-flow arrangement is preferred due to its compact size and high effectiveness. The unit cell model is formulated based on the volume-averaging method to determine the heat transfer coefficient involving two heat exchanging fluids and a solid. The various factors such as channel shape, channel edge length, channel size, and heat exchanger material can be examined based on the unit cell model. The obtained heat transfer coefficients are used for the estimation of the heat exchanger thermal performance based on the effectiveness-number of transfer units (NTU) correlation. To verify the model formulation, the heat and fluid flow over the cross-flow heat exchangers are investigated through the full-field numerical computation. The amount of heat exchanged from the numerical computation is extracted and compared with the predicted results from the unit cell model. A fairly good agreement is obtained between the two approaches. Based on the unit cell model, an aluminum cross heat exchanger with eight channel layers for the hot and cold fluids, 15 channels in each layer with a channel diameter of 2 mm, is able to meet the design target. [
机译：为了在紧凑的空间中从高功率电子芯片中散发175 W的设计目标，进行了横流热交换器的晶胞模型的制定和相应的热性能分析。由于其紧凑的尺寸和高的效率，优选以错流布置的液-液热交换器。基于体积平均法制定单位单元模型，以确定涉及两种热交换流体和固体的传热系数。可以基于晶胞模型检查各种因素，例如通道形状，通道边缘长度，通道尺寸和热交换器材料。所获得的热传递系数用于基于传递单元的有效数量（NTU）相关性来估算热交换器的热性能。为了验证模型公式，通过全场数值计算研究了横流热交换器上的热和流体流动。提取从数值计算中交换的热量，并将其与晶胞模型的预测结果进行比较。两种方法之间获得了相当好的协议。基于单元格模型，铝制交叉热交换器具有八个用于热流体和冷流体的通道层，每层中有15个通道，通道直径为2 mm，可以满足设计目标。 [

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