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CFD modeling of the CO_2 capture by range hood in a full-scale kitchen

机译：CFD建模CO_2在全尺寸厨房中射频捕获

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摘要

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 CO2 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 CO2 plume, a differential heated cavity and the performance curve of a rotating fan. The model has been confidently used to model the CO2 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.
机译：住宅中的空气质量标准连续增加。多项研究倾向于使用商业CFD软件来预测和优化范围罩中的流动条件。它们中的大多数都是在不考虑旋转风扇的情况下建模的局部罩。在本作工作中，使用OpenFoam库开发了一个新的开源解算程序。它基于浮力BoussinesQ求解器和湍流被动标量传输方程，其由旋转风扇加热CO2提取，使用多个参考帧（MRF）方法完全建模。针对三个基准情况的实验结果小心地验证了新的求解器：CO 2羽流，差动加热腔和旋转风扇的性能曲线。该模型被自信地用于将逼真的住宅厨房中的CO2提取模拟，考虑一到四个燃烧器。通过将风扇的提取流量从100到300 CFM增加来达到捕获效率的30％的提高。对于330CFM的流量，观察到100％的提取效率。

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