图中显示了当雷诺数等于 1000 时，努塞尔特数随人字形和人字形间距长度变化的结果。随着弯曲角度的增大，努塞尔特数随之字形间距长度的变化率也随之增大。当弯曲角度为 25°，人字形螺距长度从 32 毫米减小到 5 毫米时，努塞尔特数增加了 11.4%。当人字形间距长度 lz= 18 mm，弯曲角度从 5° 增加到 45° 时，努塞尔特数增加了 14.3 %。因此，在人字形 PCHE 结构参数中，角度对 PCHE 的传热性能有重要影响。冷侧通道结构的努塞尔特数分析显示了相似性。

Figure shows the results of Nusselt number variation with zigzag and zigzag pitch length when the Reynolds number is equal to 1000. The rate of Nusselt number variation with zigzag pitch length increases as the bending angle increases. When the bending angle is 25° and the zigzag pitch length is reduced from 32 mm to 5 mm, the Nusselt number increases by 11.4 %. When the zigzag pitch length lz = 18 mm and the bending angle increases from 5° to 45°, the Nusselt number increases by14.3 %. Therefore, among the zigzag PCHE structure parameters, the angle has an important influence on the heat transfer performance of PCHE. The cold side aisle structural Nusselt number analysis shows the similarity.