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Dr. Hassanein Abdelmohsen Hassanein Refaey :: Publications: |
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| Title: | Thermal performance modeling of turbulent flow in multi tube in tube helically coiled heat exchangers |
| Authors: | A. Fouda, S.A. Nada, H.F. Elattar, H.A. Refaey, Abdullah S. Bin-Mahfouz |
| Year: | 2018 |
| Keywords: | Helically coiled; Multi tubes in tube; Turbulent flow; Coil performance; Pumping power |
| Journal: | International Journal of Mechanical Sciences |
| Volume: | 135 |
| Issue: | Not Available |
| Pages: | 621–638 |
| Publisher: | Elsevier |
| Local/International: | International |
| Paper Link: | |
| Full paper | Not Available |
| Supplementary materials | Not Available |
| Abstract: |
Heat transfer characteristics and performances of a multi tubes in tube helically coiled ( MTTHC ) heat exchanger are numerically investigated. The effects of operating and geometrical parameters on the thermal and hydro- dynamic performances of the coil are studied and presented for turbulent flow regimes. The current simulation model is compared and validated with available experimental results and a good agreement is obtained. The nu- merical results showed that, the overall heat transfer coefficient ( U o ) enhanced by 23% and 28% with increasing Reynolds numbers of hot and cold water ( Re hw and Re cw ) from 9000 to17000 and 14,000 to 22,000, respectively. Coil effectiveness ( |
