In this study, experimental investigations and exergy analysis on shell and helically coiled tube heat exchanger are carried out for free convection heat transfer. The measured data are totally optimised utilizing thermodynamics rules in which exergy study is performed to investigate the thermal performance of the helical system under different operating conditions. The experimental set-up of apparatus are designed and made for cold water and hot water as a working fluid of both the shell side and helical coil side, respectively. The effects of several parameters such as geometry and operational conditions on the exergy destruction and dimensionless exergy destruction are investigated. The counter flow direction is considered under the steady state flow condition, and the critical Reynolds number was more than 4000 in this study. The main objective of this work was to clarify the effect of the volume flow rates and inlet temperatures of hot water and cold water in the shell and helical coil on exergy efficiency and pressure drop. Results showed that the exergy destruction and dimensionless exergy destruction decrease with the increase of coil pitch and Dean number. In contrast, the exergy destruction and dimensionless exergy destruction are obviously increased with the hot water flow rates or cold water flow rates. These exergy characteristics are also augmented with the values of hot water inlet temperatures and cold water inlet temperatures. The pressure drop is considerably increased with the increase of Dean number and reduced with the increase of coil diameter. While, the exergy efficiency steadily increases with the decrease of the cold water flow rates and with the increase of Dean number.

在这项研究中，进行了对流换热的壳管和螺旋盘管换热器的实验研究和火用分析。利用热力学规则对测量数据进行了完全优化，在其中进行了火用研究以研究螺旋系统在不同工况下的热性能。设计了设备的实验装置，并分别将冷水和热水用作壳侧和螺旋线圈​​侧的工作流体。研究了诸如几何形状和操作条件等几个参数对火用破坏和无量纲火用破坏的影响。在稳态流动条件下考虑了逆流方向，本研究中的临界雷诺数大于4000。这项工作的主要目的是弄清壳和螺旋盘管中热水和冷水的体积流量和入口温度对火用效率和压降的影响。结果表明，随着线圈间距和迪安数的增加，能级破坏和无量纲的能级破坏减小。相反，随着热水流量或冷水流量，火用破坏和无量纲火用破坏明显增加。这些本能特征也随着热水入口温度和冷水入口温度的值而增加。压降随着迪安数的增加而显着增加，而随着盘管直径的增加而减小。而，