An experimental study of heat transfer on a tube bank under frost formation conditions
| Autor: | F.J. Solorio-Ordaz, H.G. Ramírez-Hernández, S. Martínez-Martínez, F.A. Sánchez-Cruz |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Materials science
Dry-bulb temperature 020209 energy Mechanical Engineering Reynolds number 02 engineering and technology Building and Construction Sensible heat 01 natural sciences 010305 fluids & plasmas symbols.namesake Mass transfer 0103 physical sciences Heat transfer Frost 0202 electrical engineering electronic engineering information engineering symbols Relative humidity Composite material Wind tunnel |
| Zdroj: | International Journal of Refrigeration. 102:35-46 |
| ISSN: | 0140-7007 |
| DOI: | 10.1016/j.ijrefrig.2019.01.031 |
| Popis: | An experimental study of heat and mass transfer on a tube bank under frost formation conditions was conducted using a closed-loop wind tunnel. The tube bank was exposed to a controlled environment; surface temperature from − 14 ∘ C to − 8 ∘ C, relative humidity from 50% to 90%, air dry bulb temperature from 1 °C to 11 °C, average air velocity from 0.3 ms − 1 to 1.0 ms − 1 , and Reynolds number from 518 to 1719. The results showed a non-uniform frost growth due to the air stream characteristics. When the Reynolds number increases a more uniform pattern becomes noticeable. The frost growth is more uniform on the last tube than on the first one, due to the aerodynamic differences. Sensible heat transfer has a greater impact on the total heat transfer, compared to latent heat transfer effect. The higher the frost layer growth the lower the frost deposition rate on the tubes. |
| Databáze: | OpenAIRE |
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