Purpose

Ventilation of indoor spaces is required for the delivery of fresh air rich in oxygen and the removal of carbon dioxide, pollutants and other hazardous substances. The COVID-19 pandemic brought the topic of ventilating crowded indoors to the front line of health concerns. This study developed a new biologically inspired concept of biomimetic active ventilation (BAV) for interior environments that mimics the mechanism of human lung ventilation, where internal air is continuously refreshed with the external environment. The purpose of this study is to provide a detailed proof-of-concept of the new BAV paradigm using computational models.

Design/methodology/approach

This study developed computational fluid dynamic models of unoccupied rooms with two window openings on one wall and two BAV modules that periodically translate perpendicular to or rotate about the window openings. This study also developed a time-evolving spatial ventilation efficiency metric for exploring the accumulated refreshment of the interior space. The authors conducted two-dimensional (2D) simulations of various BAV configurations to determine the trends in how the working parameters affect the ventilation and to generate initial estimates for the more comprehensive three-dimensional (3D) model.

Findings

Simulations of 2D and 3D models of BAV for modules of different shapes and working parameters demonstrated air movements in most of the room with good air exchange between the indoor and outdoor air. This new BAV concept seems to be very efficient and should be further developed.

Originality/value

The concept of ventilating interior spaces with periodically moving rigid modules with respect to the window openings is a new BAV paradigm that mimics human respiration. The computational results demonstrated that this new paradigm for interior ventilation is efficient while air velocities are within comfortable limits.

中文翻译：

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室内空间新型仿生主动通风范例的计算分析

目的

室内空间需要通风，以输送富含氧气的新鲜空气并去除二氧化碳、污染物和其他有害物质。COVID-19 大流行将拥挤的室内通风的话题带到了健康问题的前线。这项研究开发了一种新的仿生主动通风 (BAV) 概念，适用于室内环境，模仿人体肺部通气机制，使内部空气随着外部环境不断更新。本研究的目的是使用计算模型提供新 BAV 范式的详细概念验证。

设计/方法论/途径

这项研究开发了无人居住房间的计算流体动力学模型，其中一面墙上有两个窗户开口，两个 BAV 模块定期垂直于窗户开口平移或围绕窗户开口旋转。这项研究还开发了一种随时间变化的空间通风效率指标，用于探索室内空间的累积更新。作者对各种 BAV 配置进行了二维 (2D) 模拟，以确定工作参数如何影响通风的趋势，并为更全面的三维 (3D) 模型生成初步估计。

发现

对不同形状和工作参数的模块的 BAV 2D 和 3D 模型进行模拟，证明了大部分房间内的空气运动，室内外空气之间的空气交换良好。这个新的 BAV 概念似乎非常有效，应该进一步发展。

原创性/价值

通过相对于窗户开口周期性移动的刚性模块来对室内空间进行通风的概念是一种模仿人类呼吸的新 BAV 范例。计算结果表明，这种新的室内通风范例是有效的，同时空气流速处于舒适的范围内。