This paper presents the results of an analysis of heat transfer in a cross-flow mini heat exchanger (CFMHE). The purpose of the paper was to analyze the results of the experimental measurements presented in the previous work in order to determine dimensionless correlations that allow for the calculation of heat transfer coefficients for the CFMHE. Analyzed CFMHE consisted of a brass cylindrical core, in which 2 mm circular holes were drilled. A method based on an optimization procedure was used to determine the correlations describing the heat transfer coefficients, allowing the correlations to be determined without the need of measuring the mini channel wall temperature. Overall heat transfer coefficients calculated using the proposed correlations typically did not deviate by more than ±10% from the corresponding experimental results, which was a significant improvement in the quality of the fit compared to the results presented in previous work.

中文翻译：

---

紧凑型错流微型热交换器中的传热

本文介绍了错流式微型热交换器 (CFMHE) 中的传热分析结果。本文的目的是分析之前工作中提出的实验测量结果，以确定无量纲相关性，从而计算 CFMHE 的传热系数。分析的 CFMHE 由黄铜圆柱形芯组成，其中钻有 2 毫米圆孔。使用基于优化程序的方法来确定描述传热系数的相关性，从而无需测量微型通道壁温度即可确定相关性。使用所提出的相关性计算出的总体传热系数通常与相应的实验结果偏差不超过±10%，与之前工作中提出的结果相比，拟合质量有了显着提高。