CFD modeling of the CO2 capture by range hood in a full-scale kitchen. (October 2020)

• Record Type: Journal Article
• Authors: Benchikh Le Hocine, Alla Eddine; Poncet, Sébastien; Fellouah, Hachimi
• Is Part Of: Building and environment. Volume 183(2020)
• Publication Date: 2020-10
• Subjects: Capture efficiency -- Range hood -- CO2 extraction -- Turbulence modeling -- OpenFoam; Buildings -- Environmental engineering -- Periodicals; Building -- Research -- Periodicals; Constructions -- Technique de l'environnement -- Périodiques; Electronic journals; 696
• DOI: 10.1016/j.buildenv.2020.107168
• Languages: English
• ISSNs: 0360-1323

Abstract

Abstract: Air quality criteria in residential houses are increasing continuously. Multiple studies tend to use commercial CFD software in order to predict and optimize the flow conditions in range hoods. Most of them modeled the range hood without considering the rotating fan. In the present work, a new open-source solver was developed using the OpenFoam libraries. It is based on a buoyancy Boussinesq solver and a turbulent passive scalar transport equation accounting for the heated C O 2 extraction by the rotating fan, fully modeled using the Multiple reference frame (MRF) approach. The new solver is carefully validated against experimental results for three benchmark cases: a C O 2 plume, a differential heated cavity and the performance curve of a rotating fan. The model has been confidently used to model the C O 2 extraction in a realistic residential kitchen considering one to four burners on. An improvement of 30% in the capture efficiency is reached by increasing the extraction flowrate of the fan from 100 to 300 cfm. An extraction efficiency of 100% is observed for flowrates above 330 cfm. Highlights: New open-source solver is developed to predict the CO2 capture by the range hood rotating fan in a 3D full-scale kitchen. The increase of the flow rate from 100 cfm to 300 cfm improves the capture efficiency by 30%. The flow rate increase changes the CO2 capture pattern between the stove and the range hood. The capture velocity in line 1 is insensitive to the Ignition of new burners.