Abed, Tareq H.2022-05-172022-05-1720212021Abed, T. H. (2021). Thermal performance improvement of shell and helical coil heat exchanger (Yayınlanmış yüksek lisans tezi). Altınbaş Üniversitesi, Lisansüstü Eğitim Enstitüsü, İstanbul.https://hdl.handle.net/20.500.12939/2449Nowadays, energy consumption increases so it is necessary to enhance the efficiency and performance of heat energy transition. The effects of perforated twisted tape on heat transfer factor, effectiveness, Nusselt number, and pressure drop are studied numerically. Modeling of HE with the perforated twisted tape is applied where finite volume manner is utilized to perform the setup and complete the solution. Validation of numerical results and experimental previous results is done and there is an excessive settlement between the numerical and experimental results. The range of Res is from 3800 to 18000. The results indicated that the U rises with the rise of Re where the perforated twisted tape achieves the extreme improvement of heat transfer coefficient achieving the numbers from 965 to 1250 W/m2K. The perforated twisted tape has the highest ratio of enhancing Nu following the numbers from 65 to 115 and this can be explained as the velocity rises, the turbulence level increases. HE effectiveness increases with the growth of Re where the perforated twisted tape attained the supreme enhancement of effectiveness reaching the numbers from 0.35 to 0.85. It is indicated that the twisted tape configuration has the maximum ratio of ΔP increase as the complicity of twisted tape rise the ΔP. Contours and streamlines of hot and cold water cross the HE explains the distributions of temperature, velocity, and pressure.eninfo:eu-repo/semantics/closedAccessHEPerforated Twisted TapeThermal PerformanceHelical CoilMaster Thesis697254