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Experimental Characterization of a Compact Milli-Channel Heat Exchanger for Liquid-Liquid Heat Transfer

机译：紧凑型毫频型热交换器进行液液传热的实验表征

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摘要

The use of Milli-Channel Heat Exchangers (MCHE) presents numerous assets: efficient heat transfer, huge compactness, and limited pressure drop. For an engineer, the Fanning friction factor and the convective heat transfer coefficient are two main parameters to describe the performance of a heat exchanger. A brazed MCHE with rectangular channels in stainless steel made by the Institut fur Mikrotechnik Mainz (IMM, Mainz, Germany) has been characterized experimentally and theoretically in a counter-current configuration. The selected working fluids are deionized water and oil without any phase change during experiments. The pilot unit ensures measurements of pressure drops, temperatures, and volumetric flow rate of each fluid flowing in laminar regime. A one-dimensional model has been developed. The temperature and pressure profiles of each fluid are represented by differential equations associated with boundary conditions. The system of coupled equations consists in a two-point boundary value problem solved numerically by the Matlab software. The parameters of a Nusselt number correlation are identified together with those of a Fanning friction factor one by minimizing a sum of squared differences between experimental and predicted data. The calculated temperature and pressure profiles present a good agreement with measurements. A statistical analysis shows that each optimized parameter is significant.
机译：使用毫频型热交换器（MCHE）呈现众多资产：高效的传热，巨大的紧凑性和有限的压降。对于工程师，扇动摩擦系数和对流传热系数是描述热交换器性能的两个主要参数。钎焊商用Institut Fur Mikrotechnik Mainz（Imm，Mainz，德国）制造的不锈钢钢板，已经在实验和理论上以反式配置为特征。所选择的工作流体是去离子水和油，而在实验期间没有任何相变。试点单元确保在层流状态下流动的每个流体的压降，温度和体积流量的测量。已经开发了一维模型。每个流体的温度和压力分布由与边界条件相关的差分方程表示。耦合方程系统在由MATLAB软件上数字解决的两点边值问题中组成。通过最小化实验性和预测数据之间的平方差之和，与扇动摩擦因子相同的那些识别出营养数相关的参数。计算的温度和压力型材与测量值良好。统计分析表明每个优化的参数都很重要。

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  • 来源
    《Heat Transfer Engineering》 |2020年第22期|1869-1884|共16页
  • 作者

    Jean-Francois Portha; Guillaume Henry; Alexandra Pere-Gigante; Jean-Marc Commenge;

  • 作者单位

    Laboratoire Reactions et Genie des Precedes Universite de Lorraine CNRS LRGP Nancy France;

    Laboratoire Reactions et Genie des Precedes Universite de Lorraine CNRS LRGP Nancy France;

    Laboratoire Reactions et Genie des Precedes Universite de Lorraine CNRS LRGP Nancy France;

    Laboratoire Reactions et Genie des Precedes Universite de Lorraine CNRS LRGP Nancy France;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
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