HEAT TRANSFER FROM A HORIZONTAL BUBBLING SURFACE TO AN OVERLYING WATER POOL†

Autor:	Thomas F. Irvine, M.R. Duignan, G. A. Greene
Rok vydání:	1990
Předmět:	Atmospheric pressure General Chemical Engineering chemistry.chemical_element Thermodynamics General Chemistry Heat transfer coefficient Mechanics Water pool Nitrogen Barbotage chemistry Heat transfer Boiling water reactor Body orifice
Zdroj:	Chemical Engineering Communications. 87:185-194
ISSN:	1563-5201 0098-6445
Popis:	An experimenl was performed to study the effects of bubbling from a circular, horizontal, fiat plate on the heat transfer to an overlying water pool. The plate had drilled orifices through which nitrogen was injected into an overlying pool of water at atmospheric pressure. For “deep” pools, the heat transfer coefficient was found to increase only about 20% over a range of superficial gas velocities from 0.6 to 8.5cm/s, A turbulent heat transfer model developed by Konsetov was found to agree well with the data from this experiment. This model and the experimental data suggest that under certain conditions the heat transfer coefficient is similar for both horizontal and vertical surfaces. These conditions are, that the bubbles only contribute to the stirring action in the pool and only when the bubbling pool is considered “deep”. When the pool height fell below 60% of its diameter, the heat transfer coefficient decreased almost linearly with pool height. This suggests that there occurs a reduction ...
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::c0fa7da67d9dfe969fa48147610ff1c8 https://doi.org/10.1080/00986449008940691 Zobrazit plný text záznamu