开窗对吊扇自然通风住宅卧室内气流分布的影响

IF 1.5 4区 工程技术 Q3 CONSTRUCTION & BUILDING TECHNOLOGY
T. Jayasree, B. S. Jinshah, Tadepalli Srinivas
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引用次数: 6

摘要

吊扇是任何有电的家庭中最常见的设备,因为自然通风的潜力是有限的。然而,较高气流区域通常局限于风扇下方的区域。气流的不均匀分布也受到家具布局和窗户开口气流的影响。这项研究试图通过数值模拟和现场测量来评估不同的开窗模式对自然通风卧室内气流的影响,卧室内有一个用于空气流动的吊扇。使用ANSYS Fluent 2019 R3对装有家具的房间中的吊扇产生的气流模式进行建模和模拟。通过现场测量对结果进行了验证,并与文献进行了比较。空气流速是在三个不同尺寸的卧室中测量的。据观察,无论房间大小,开窗都能更好地分配空气。在较大尺寸的房间中,随着窗户的打开,气流速度的不均匀性从76%降低到39%。不均匀性的降低也受到窗口位置的影响。随着吊扇引起的空气流动而打开窗户的做法会使空气在空间中更好地分布。实际应用:人们往往主要依赖吊扇,即使在自然通风的房间里窗户是开着的。对气流不均匀分布模式的研究可以帮助设计师在设计房间家具布局时通过指定风扇和窗户的数量和位置来改善舒适条件。这有助于建筑服务工程师在不总是依赖替代主动通风策略的情况下提供热舒适性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
The effect of opening windows on the airflow distribution inside naturally ventilated residential bedrooms with ceiling fans
Ceiling fans are the most common equipment in any household with electricity to induce a higher air movement since the potential of natural ventilation is limited. However, the higher airflow region is generally limited to the zone below the fan. The non-uniform distribution of airflow is also affected by the furniture layout and airflow from window openings. This study attempts to evaluate the effect of the different window-opening patterns on the airflow inside naturally ventilated bedrooms, having a ceiling fan for air movement with numerical simulations and on-site measurements. The airflow pattern created by a ceiling fan in a room with furniture is modelled and simulated with ANSYS Fluent 2019 R3. The results were validated with on-site measurements and compared with the literature. The air velocity was measured in bedrooms of three different sizes. It was observed that the opening of windows created a better distribution of air irrespective of room size. The non-uniformity of the air velocity is reduced from 76% to 39% with the opening of windows in the larger-sized room. The reduction in non-uniformity is influenced by the location of windows also. The practice of opening windows along with the induced air movement by ceiling fans results in a better distribution of air in the space. Practical application : People tend to depend mainly on ceiling fans even if windows are open in naturally ventilated rooms. A study of patterns of non-uniform distribution of airflow can help designers to improve comfort conditions by specifying the number and location of fans and windows while designing room furniture layout. This aids the building services engineers to provide thermal comfort without always depending on alternative active ventilation strategies.
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来源期刊
Building Services Engineering Research & Technology
Building Services Engineering Research & Technology 工程技术-结构与建筑技术
CiteScore
4.30
自引率
5.90%
发文量
38
审稿时长
>12 weeks
期刊介绍: Building Services Engineering Research & Technology is one of the foremost, international peer reviewed journals that publishes the highest quality original research relevant to today’s Built Environment. Published in conjunction with CIBSE, this impressive journal reports on the latest research providing you with an invaluable guide to recent developments in the field.
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