{"title":"开发可降解物质浓度的最佳控制方法","authors":"Tomohito Matsuo, Hikari Shimadera, Akira Kondo","doi":"10.1155/2024/1094914","DOIUrl":null,"url":null,"abstract":"<p>Indoor environments affect occupant hygiene, comfort, and productivity. Special treatments, such as spraying essential oils, disinfectant gases, and water vapor or droplets, have been proposed to improve indoor comfort in recent years. Therefore, a method to control the concentrations of these beneficial substances is required. To control the indoor concentration distribution of various degradable substances emitted indoors, this article proposes a novel method that uses the linear relationship between the source and concentration distributions. The method was evaluated through numerical experiments using CFD. Furthermore, the effects of the deposition (Dep) and decomposition (Dec) of the substances on the performance were assessed. The method successfully determined the optimal emission intensities for each emission source to make the concentration field close to the objective—the uniform distribution—in the experiment. When substances decomposed in the air or were deposited on the walls, the performance of the optimal control decreased compared to the case without Dec or Dep. This indicated that the occurrence of Dec or Dep lowered the optimization performance by enhancing the unevenness of the concentration field in the area near the emission source and far from the source. The Dep case showed relatively lower performance than the Dec case because the Dep occurred more spatially unevenly than the Dec. In addition, the more emission sources employed, the smaller the gap between the objective and the optimized concentration field. This method will help control indoor air quality more efficiently.</p>","PeriodicalId":13529,"journal":{"name":"Indoor air","volume":null,"pages":null},"PeriodicalIF":4.3000,"publicationDate":"2024-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1155/2024/1094914","citationCount":"0","resultStr":"{\"title\":\"Development of an Optimal Control Method for the Concentration of Degradable Substances\",\"authors\":\"Tomohito Matsuo, Hikari Shimadera, Akira Kondo\",\"doi\":\"10.1155/2024/1094914\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>Indoor environments affect occupant hygiene, comfort, and productivity. Special treatments, such as spraying essential oils, disinfectant gases, and water vapor or droplets, have been proposed to improve indoor comfort in recent years. Therefore, a method to control the concentrations of these beneficial substances is required. To control the indoor concentration distribution of various degradable substances emitted indoors, this article proposes a novel method that uses the linear relationship between the source and concentration distributions. The method was evaluated through numerical experiments using CFD. Furthermore, the effects of the deposition (Dep) and decomposition (Dec) of the substances on the performance were assessed. The method successfully determined the optimal emission intensities for each emission source to make the concentration field close to the objective—the uniform distribution—in the experiment. When substances decomposed in the air or were deposited on the walls, the performance of the optimal control decreased compared to the case without Dec or Dep. This indicated that the occurrence of Dec or Dep lowered the optimization performance by enhancing the unevenness of the concentration field in the area near the emission source and far from the source. The Dep case showed relatively lower performance than the Dec case because the Dep occurred more spatially unevenly than the Dec. In addition, the more emission sources employed, the smaller the gap between the objective and the optimized concentration field. 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引用次数: 0
摘要
室内环境会影响居住者的卫生、舒适度和工作效率。近年来,人们提出了一些特殊的处理方法,如喷洒精油、消毒气体、水蒸气或水滴等,以改善室内舒适度。因此,需要一种方法来控制这些有益物质的浓度。为了控制室内排放的各种可降解物质的室内浓度分布,本文提出了一种利用源分布和浓度分布之间线性关系的新方法。通过使用 CFD 进行数值实验,对该方法进行了评估。此外,还评估了物质的沉积(Dep)和分解(Dec)对性能的影响。该方法成功地确定了每个排放源的最佳排放强度,使浓度场接近实验目标--均匀分布。当物质在空气中分解或沉积在墙壁上时,优化控制的性能比没有发生 Dec 或 Dep 的情况有所下降,这表明 Dec 或 Dep 的发生增强了排放源附近和远离排放源区域浓度场的不均匀性,从而降低了优化性能。此外,采用的排放源越多,目标与优化浓度场之间的差距就越小。这种方法有助于更有效地控制室内空气质量。
Development of an Optimal Control Method for the Concentration of Degradable Substances
Indoor environments affect occupant hygiene, comfort, and productivity. Special treatments, such as spraying essential oils, disinfectant gases, and water vapor or droplets, have been proposed to improve indoor comfort in recent years. Therefore, a method to control the concentrations of these beneficial substances is required. To control the indoor concentration distribution of various degradable substances emitted indoors, this article proposes a novel method that uses the linear relationship between the source and concentration distributions. The method was evaluated through numerical experiments using CFD. Furthermore, the effects of the deposition (Dep) and decomposition (Dec) of the substances on the performance were assessed. The method successfully determined the optimal emission intensities for each emission source to make the concentration field close to the objective—the uniform distribution—in the experiment. When substances decomposed in the air or were deposited on the walls, the performance of the optimal control decreased compared to the case without Dec or Dep. This indicated that the occurrence of Dec or Dep lowered the optimization performance by enhancing the unevenness of the concentration field in the area near the emission source and far from the source. The Dep case showed relatively lower performance than the Dec case because the Dep occurred more spatially unevenly than the Dec. In addition, the more emission sources employed, the smaller the gap between the objective and the optimized concentration field. This method will help control indoor air quality more efficiently.
期刊介绍:
The quality of the environment within buildings is a topic of major importance for public health.
Indoor Air provides a location for reporting original research results in the broad area defined by the indoor environment of non-industrial buildings. An international journal with multidisciplinary content, Indoor Air publishes papers reflecting the broad categories of interest in this field: health effects; thermal comfort; monitoring and modelling; source characterization; ventilation and other environmental control techniques.
The research results present the basic information to allow designers, building owners, and operators to provide a healthy and comfortable environment for building occupants, as well as giving medical practitioners information on how to deal with illnesses related to the indoor environment.