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EnglishProcesses involving heat transfer from a humid air stream to a vertical plate, with simultaneous deposition of frost, are of great importance in a variety of refrigeration equipment. In this work, frost growth on a vertical plate in free convection has been experimentally investigated. The plate, cooled by the internal circulation of glycol, was placed in a vertical channel open at the top and bottom in order to permit the natural circulation of ambient air. The cold plate temperatures were varied in the 13 to 4°C range, while the relative humidity and temperature of the ambient air were taken in the 31-58% and 26-28°C ranges, respectively. Measured quantities (frost thickness, frost surface temperature, deposited mass of frost, heat flux at the plate/frost interface) were compared with results given by a simple model based on standard relationships (for heat and mass transfer coefficients, frost density and thermal conductivity) reported in the literature.
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| Titolo: | Study of the free convection frost formation on a vertical plate |
| Autori: | |
| Data di pubblicazione: | 2002 |
| Rivista: | |
| Abstract: | Processes involving heat transfer from a humid air stream to a vertical plate, with simultaneous deposition of frost, are of great importance in a variety of refrigeration equipment. In this work, frost growth on a vertical plate in free convection has been experimentally investigated. The plate, cooled by the internal circulation of glycol, was placed in a vertical channel open at the top and bottom in order to permit the natural circulation of ambient air. The cold plate temperatures were varied in the 13 to 4°C range, while the relative humidity and temperature of the ambient air were taken in the 31-58% and 26-28°C ranges, respectively. Measured quantities (frost thickness, frost surface temperature, deposited mass of frost, heat flux at the plate/frost interface) were compared with results given by a simple model based on standard relationships (for heat and mass transfer coefficients, frost density and thermal conductivity) reported in the literature. |
| Handle: | http://hdl.handle.net/11567/209115 |
| Appare nelle tipologie: | 01.01 - Articolo su rivista |
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