| publication name | 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 | https://www.sciencedirect.com/science/article/pii/S0020740317323263 |
| Full paper | download |
| 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 (