The present experimental study brings about the flow maldistribution in the single and multi-pass plate heat exchanger. The different plates packages of 11, 23, 36, and 44 plates are configured in 1–1 pass, whereas 23 and 44 plates are individually configured in 2–2, 3–3, and 4–4 multi-pass arrangements. The experiments have been performed with mixed chevron angle in the Z-type flow configuration of the PHEs for Reynolds number, Re=297–2730, mass flow rate,$\left(\dot{m}\right)=0.55-1.28kg/s$, volumetric flow rate, $\dot{V}=2000-4600LPH$, inlet temperature for hot and cold fluids, $T_{h_i}={40}^{\circ }Cand{T}_{c_i}={14}^{\circ }C$ respectively. The findings indicate that as the number of plates rises, the flow distribution becomes more non-uniform, whereas the increment in the number of pass arrangements brings the flow uniformity inside the channels of the PHEs. It is also found that a multi-pass gives a better thermal performance as compared to a single-pass arrangement. The correlations are established on experimental data for the effectiveness and friction factor using non-linear regression analysis for all configurations of the PHEs.

目前的实验研究导致了单程和多程板式换热器中的流量分布不均。11、23、36 和 44 板的不同板组配置为 1-1 次通过，而 23 和 44 板则分别配置为 2-2、3-3 和 4-4 次多程排列。实验是在 PHE 的 Z 型流动配置中使用混合 V 形角进行的，雷诺数Re =297-2730，质量流量，$\left(\dot{米}\right)=0.55-1.28克G/秒$, 体积流量, $\dot{伏}=\mathrm{2000年}-4600升磷H$, 冷热流体的入口温度, ${吨}_{H_{\mathrm{一世}}}={40}^{\circ }C\mathrm{一个}nd{吨}_{C_{\mathrm{一世}}}={14}^{\circ }C$分别。研究结果表明，随着板数的增加，流量分布变得更加不均匀，而通道布置数量的增加带来了 PHE 通道内的流动均匀性。还发现与单程布置相比，多程提供更好的热性能。相关性是在有效性和摩擦系数的实验数据上建立的，对所有配置的 PHE 使用非线性回归分析。