Ventilation is an effective solution for improving indoor air quality and reducing airborne transmission.Buildings need sufficient ventilation to maintain a low infection risk but also need to avoid an excessive venti...Ventilation is an effective solution for improving indoor air quality and reducing airborne transmission.Buildings need sufficient ventilation to maintain a low infection risk but also need to avoid an excessive ventilation rate,which may lead to high energy consumption.The Wells-Riley(WR)model is widely used to predict infection risk and control the ventilation rate.However,few studies compared the non-steady-state(NSS)and steady-state(SS)WR models that are used for ventilation control.To fill in this research gap,this study investigates the effects of the mechanical ventilation control strategies based on NSS/SS WR models on the required ventilation rates to prevent airborne transmission and related energy consumption.The modified NSS/SS WR models were proposed by considering many parameters that were ignored before,such as the initial quantum concentration.Based on the NSS/SS WR models,two new ventilation control strategies were proposed.A real building in Canada is used as the case study.The results indicate that under a high initial quantum concentration(e.g.,0.3 q/m^(3))and no protective measures,SS WR control underestimates the required ventilation rate.The ventilation energy consumption of NSS control is up to 2.5 times as high as that of the SS control.展开更多
英国Riley公司致力于改进常规Riley Velsuede五罗拉立式仿麂皮起绒机。全新的Velsuede Mark Ⅲ型仿麂皮起绒机吸取了多年来以及纺织品表面整理机械制造的经验,具有一系列的先进性能,大大扩展了起绒整理和织物整理的概念,改善织物整理的...英国Riley公司致力于改进常规Riley Velsuede五罗拉立式仿麂皮起绒机。全新的Velsuede Mark Ⅲ型仿麂皮起绒机吸取了多年来以及纺织品表面整理机械制造的经验,具有一系列的先进性能,大大扩展了起绒整理和织物整理的概念,改善织物整理的适用性。该机已制造成功,并计划销往中国。 该机可加工易变的、难以加工的织物。当棉、合纤织物通过立式仿麂皮起绒机的5个包覆磨料的工作辊时。展开更多
基金Project(RGPIN-2019-05824)supported by the Start-up Fund of Universitéde Sherbrooke and Discovery Grants of Natural Sciences and Engineering Research Council of Canada(NSERC)。
文摘Ventilation is an effective solution for improving indoor air quality and reducing airborne transmission.Buildings need sufficient ventilation to maintain a low infection risk but also need to avoid an excessive ventilation rate,which may lead to high energy consumption.The Wells-Riley(WR)model is widely used to predict infection risk and control the ventilation rate.However,few studies compared the non-steady-state(NSS)and steady-state(SS)WR models that are used for ventilation control.To fill in this research gap,this study investigates the effects of the mechanical ventilation control strategies based on NSS/SS WR models on the required ventilation rates to prevent airborne transmission and related energy consumption.The modified NSS/SS WR models were proposed by considering many parameters that were ignored before,such as the initial quantum concentration.Based on the NSS/SS WR models,two new ventilation control strategies were proposed.A real building in Canada is used as the case study.The results indicate that under a high initial quantum concentration(e.g.,0.3 q/m^(3))and no protective measures,SS WR control underestimates the required ventilation rate.The ventilation energy consumption of NSS control is up to 2.5 times as high as that of the SS control.
文摘英国Riley公司致力于改进常规Riley Velsuede五罗拉立式仿麂皮起绒机。全新的Velsuede Mark Ⅲ型仿麂皮起绒机吸取了多年来以及纺织品表面整理机械制造的经验,具有一系列的先进性能,大大扩展了起绒整理和织物整理的概念,改善织物整理的适用性。该机已制造成功,并计划销往中国。 该机可加工易变的、难以加工的织物。当棉、合纤织物通过立式仿麂皮起绒机的5个包覆磨料的工作辊时。
