Various techniques have been utilized to improve the performance of heat exchangers. In this study, multiple passive enhancement techniques have been applied. Triangular fins have been fabricated on the outside surface of the longitudinal helical heat exchanger. The performance of the new heat exchanger has been investigated experimentally and mathematically. In counterflow, hot water flowed inside the helical tube at 60 ᵒC while cold water entered the shell at 30 ᵒC. A triangle copper fin with 1 cm height, 2 cm base length, and 0.3 cm thickness with 4 cm pitch distance was welded at the external surface of the helical Copper coil tube. Along the helically coiled tube, 123 fins have been welded on the outside surface with 25 overall coil turns heat exchangers.

The results showed a good enhancement ratio compared to the unfinned helical heat exchanger. The thermal performance factor showed an improvement of more than 10% compared to plain tube coils with an increase in the effectiveness of 11%. The improvement in the Nusselt number was 16.5%. These results confirmed that the fins addition on the helical coil heat exchanger modified and improved the helical heat exchanger and supported the industrial design with better performance.

已经利用各种技术来改进热交换器的性能。在这项研究中，已经应用了多种被动增强技术。在纵向螺旋换热器的外表面上制造了三角形翅片。已经通过实验和数学方法研究了新型换热器的性能。在逆流中，热水在 60 ᵒC 时流入螺旋管内，而冷水在 30 ᵒC 时进入外壳。在螺旋铜盘管的外表面焊接高1厘米、底长2厘米、厚0.3厘米、间距4厘米的三角形铜翅片。沿着螺旋盘管的外表面焊接了123片翅片，总盘管匝数为25。

结果表明，与无翅片螺旋换热器相比，具有良好的增强比。与普通管盘管相比，热性能系数提高了 10% 以上，效率提高了 11%。努塞尔数的改进为 16.5%。这些结果证实，在螺旋盘管换热器上添加翅片对螺旋换热器进行了改进和改进，并以更好的性能支持工业设计。