Abstract Electrospun nanofiber air filters can achieve remarkable particle filtration efficiency with low pressure drop. Therefore, they can potentially be installed in buildings for reducing indoor PM2.5 concentrations. To improve filtration performance, this study developed a design and fabrication approach for electrospun nanofiber air filters with minimized pressure drop under a target PM2.5 filtration efficiency. First, this research developed semi-empirical models for calculating the pressure drop and PM2.5 filtration efficiency of nylon electrospun nanofiber filters using the fabrication parameters of electrospinning time and nylon concentration. With the developed models, this investigation then proposed an optimization approach to minimize the pressure drop under a given PM2.5 filtration efficiency and air velocity. For a given air velocity and PM2.5 filtration efficiency, one can minimize the pressure drop by finding the optimal solution concentration, while the target PM2.5 filtration efficiency can be achieved through adjustment of the electrospinning time. Furthermore, the proposed optimization approach successfully minimized the pressure drop for 110 out of the 125 cases, with an average pressure drop reduction of 32.7%. Finally, this research numerically studied the performance of a window screen coated with the optimized nanofiber filter in reducing indoor PM2.5 of outdoor origin.

中文翻译：

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一种用于制造具有最小压降的电纺纳米纤维空气过滤器的优化方法，用于室内 PM2.5 控制

摘要 静电纺纳米纤维空气过滤器可以在低压降下实现显着的颗粒过滤效率。因此，它们有可能安装在建筑物中以降低室内 PM2.5 浓度。为了提高过滤性能，本研究开发了一种电纺纳米纤维空气过滤器的设计和制造方法，在目标 PM2.5 过滤效率下具有最小的压降。首先，本研究开发了半经验模型，用于使用静电纺丝时间和尼龙浓度的制造参数计算尼龙静电纺纳米纤维过滤器的压降和 PM2.5 过滤效率。使用开发的模型，本研究随后提出了一种优化方法，以在给定的 PM2.5 过滤效率和空气速度下最小化压降。对于给定的风速和 PM2.5 过滤效率，可以通过找到最佳溶液浓度来最小化压降，而目标 PM2.5 过滤效率可以通过调整静电纺丝时间来实现。此外，所提出的优化方法成功地将 125 种情况中的 110 种的压降降至最低，平均压降降低了 32.7%。最后，本研究数值研究了涂有优化的纳米纤维过滤器的窗纱在减少室内室外 PM2.5 的性能。建议的优化方法成功地将 125 个案例中的 110 个的压降降至最低，平均压降降低了 32.7%。最后，本研究数值研究了涂有优化的纳米纤维过滤器的窗纱在减少室内室外 PM2.5 的性能。建议的优化方法成功地将 125 个案例中的 110 个的压降降至最低，平均压降降低了 32.7%。最后，本研究数值研究了涂有优化的纳米纤维过滤器的窗纱在减少室内室外 PM2.5 的性能。