Modelling the pressure drop across HEPA filters during cake filtration in the presence of humidity
| Autor: | Sandrine Chazelet, Jean-Claude Laborde, Laurent Bouilloux, Aurélie Joubert, Dominique Thomas |
|---|---|
| Přispěvatelé: | IRSN-DSU-SERAC, Laboratory for the Experimental Study of Containment, Air Cleaning and Ventilation, Laboratoire Réactions et Génie des Procédés (LRGP), Université de Lorraine (UL)-Centre National de la Recherche Scientifique (CNRS) |
| Jazyk: | angličtina |
| Rok vydání: | 2011 |
| Předmět: |
010504 meteorology & atmospheric sciences
General Chemical Engineering Flow (psychology) 02 engineering and technology 01 natural sciences Industrial and Manufacturing Engineering Modelling law.invention 020401 chemical engineering law HEPA Environmental Chemistry Relative humidity [SPI.GPROC]Engineering Sciences [physics]/Chemical and Process Engineering 0204 chemical engineering Composite material Pressure drop Hygroscopicity Filtration 0105 earth and related environmental sciences Chemistry Environmental engineering Humidity General Chemistry Aerosol Filter (aquarium) HEPA filter Cake filtration |
| Zdroj: | Chemical Engineering Journal Chemical Engineering Journal, Elsevier, 2011, 166 (2), pp.616-623. ⟨10.1016/j.cej.2010.11.033⟩ |
| ISSN: | 1385-8947 |
| DOI: | 10.1016/j.cej.2010.11.033⟩ |
| Popis: | International audience; The modelling of the variation in the pressure drop across a HEPA filter during cake filtration in the presence of humidity was studied. A semi-empirical model was developed that considers the pressure drop across the clogged filter as the sum of the pressure drops across the clean filter and across the cake, which is itself decomposed into several successive layers. The pressure drop across each layer of particles depends on its state of equilibrium with the air humidity. The model includes the specific resistance of each layer of particles and its variation when the cake is exposed to a flow of moist air. This model applies for relative humidity below the deliquescent point of the aerosol if it is hygroscopic. The results show good agreement between the calculated values and experimental values for flat filters clogged with aluminium oxide and sodium chloride test aerosols. The model also revealed the influence of filtration time on the evolution of the pressure drop across a clogged filter in the presence of humidity, especially with a hygroscopic aerosol. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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