Herein, a novel hybrid shell and double pipe heat exchanger was fabricated and applied for intensification of heat transfer process. The heat transfer surface was increased using double pipes instead of simple tubes. The streams flowed through the annulus, and exchanged the heat with two fluids in sandwiched manner. The performance of this device was carried out by modeling and simulation. The simulated results were validated with experimental data under steady state environments for different flow patterns, namely, co-current, counter-current, insulated and non-insulated configurations. Heat exchanger worked with three fluids such as two hot fluids and a cold fluid (H-C-H) or vice versa (C-H-C) relying on the purpose of heating or cooling. The results indicated that the predictions of the temperature variations in terms of magnitude and trends were in good agreement with the experimental data. Fluid flow distributions in all regions of the heat exchanger were found to be turbulent. Pressure drop and standard uncertainty values were calculated to be small. It was found that the proposed heat exchanger was more efficient (efficiency ~60%) than other design configurations (e.g., double pipe, shell and tube) as well as the existing lab-scale shell and tube heat exchanger (training apparatus).

在此，制造了一种新型的混合壳管式双管换热器，并将其应用于强化传热过程。使用双管代替简单管来增加传热表面。流体流过环空，并以夹心方式与两种流体进行热交换。该设备的性能是通过建模和仿真来实现的。在稳态环境下，针对不同流动模式（顺流，逆流，绝缘和非绝缘配置）的实验数据验证了仿真结果。依赖于加热或冷却的目的，热交换器与三种流体一起工作，例如两种热流体和冷流体（HCH），反之亦然（CHC）。结果表明，温度变化幅度和趋势的预测与实验数据吻合良好。发现在热交换器的所有区域中的流体流动分布是湍流的。计算得出的压降和标准不确定度值很小。发现所提出的热交换器比其他设计配置（例如，双管，壳和管）以及现有实验室规模的壳管式热交换器（培训设备）更有效（效率约60％）。