Yazar "Abed, Tareq H." seçeneğine göre listele

Listeleniyor 1 - 2 / 2
  • [ X ]
    Öğe
    Thermal performance improvement of shell and helical coil heat exchanger
    (Altınbaş Üniversitesi, 2021) Abed, Tareq H.
    Nowadays, 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.
  • Küçük Resim
    Öğe
    Thermal performance improvement of shell and helical coil heat exchanger
    (Altınbaş Üniversitesi, 2021) Abed, Tareq H.; Koç, İbrahim
    Nowadays, 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 coefficient, effectiveness, Nusselt number, and pressure drop are studied numerically. Modeling of heat exchanger with the perforated twisted tape is applied where finite volume method is utilized to perform the setup and complete the solution. The numerical results are validated with previous experimental results and there is an excessive agreement between the numerical and experimental results. The range of Reynolds numbers is from 3800 to 18000. The results showed that the overall heat transfer coefficient U increases with the rise of Reynolds number where the perforated twisted tape achieves the maximum enhancement of heat transfer coefficient achieving the numbers from 965 to 1250 W/m2 K. The perforated twisted tape has the highest ratio of enhancing Nusselt number following the numbers from 65 to 115 and this can be explained as the velocity rises, the turbulence level increases. Heat exchanger effectiveness increases with the growth of Reynolds number 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 pressure drop increase as the complicity of twisted tape rise the pressure drop. Contours and streamlines of hot and cold water cross the heat exchanger explains the distributions of temperature, velocity, and pressure.