Window purifying ventilator using a crossflow fan

Authors: Jiayu Li Yuefei Hou Junjie Liu Zhiqiang Wang Fei Li

Publish Date: 2016/03/01

Volume: 9, Issue: 4, Pages: 481-488

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Abstract

The window purifying ventilator is a relatively new idea that involves replacing one part of the window frame with a ventilator for which the core component is a crossflow fan CFF When a CFF is applied to the window purifying ventilator a filter should be added and its casing should be modified In this paper first timeaccurate solutions with a sliding mesh technique were developed for modelling the twodimensional viscous and incompressible model of CFF Three prevalent twoequation turbulence models Standard RNG and Realizable k–ε models for CFF simulation were compared and validated in the experiments and the most suitable model for this type CFF was found Based on the timeaccurate simulation the formation of flow construction inside the CFF was also observed and explained Next the CFF was optimized for window purifying ventilator by redesigning and modifying the shape and location of vortex wall and rear wall both numerically and experimentally From the research results the vortex wall’s position has a great influence on the ventilator’s performance by determining the position and intensity of eccentric vortex and the shape of the rear wall also affects the ventilator’s performance by determining the flow pattern and internal flow resistance Through appropriate designing the vortex and rear wall finally the CFF could apply to the window purifying ventilator with acceptable flow rates

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