Thermal comfort in mixed-mode cooled houses: A field study in the hot-humid climate of Danang, Vietnam

IF 6.6 2区 工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY
Dung Le , Ineko Tanaka , Qingyuan Zhang , Ryogo Mayama
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Abstract

Natural ventilation is an essential efficient energy strategy for cooling in hot and humid tropical regions. In Vietnam, however, increasing living standards led to a significant rise in the use of air conditioners in housing, resulting in elevated energy consumption. Typically, natural ventilation and fans serve as the primary cooling method throughout the house, while air conditioners—mainly installed in bedrooms—are used only when residents are present and feel hot. Although this mixed-mode cooling method has gained popularity, the indoor thermal environment remains underexplored within the context of Vietnam’s thermal environment. This paper presents the results of an investigation into indoor thermal conditions and residents’ sensations under mixed-mode cooled environments in humid tropical Danang, Vietnam. The study encompasses both air-conditioned and naturally ventilated spaces for a comprehensive comparison. Measurements on environmental parameters and a survey on thermal sensation were conducted among 60 households in Danang from August − October 2022 and June – August 2023. Despite being in a coastal area, the houses were poorly ventilated, and indoor temperatures were often higher than outdoor temperatures. However, most residents reported satisfaction with their indoor conditions. The PMV index was found ineffective in predicting the thermal sensation of houses utilizing a mixed-mode cooling approach. A small group of respondents may have adjusted their expectations to accommodate their actual indoor thermal environment. The study provides insight into indoor thermal conditions and residents’ sensations in the context of Danang housing for further energy-saving initiatives and home thermal comfort.
混合模式制冷房屋的热舒适:越南岘港湿热气候的实地研究
在炎热潮湿的热带地区,自然通风是一种重要的高效能源策略。然而,在越南,生活水平的提高导致空调在住房中的使用大幅增加,导致能源消耗增加。通常,自然通风和风扇是整个房子的主要冷却方式,而空调(主要安装在卧室)只有在居民在场并感到热时才使用。尽管这种混合模式的冷却方法已经得到了普及,但在越南的热环境背景下,室内热环境仍未得到充分的探索。本文介绍了在越南潮湿的热带岘港混合模式冷却环境下室内热条件和居民感觉的调查结果。该研究包括空调和自然通风空间进行全面比较。在2022年8月至10月和2023年6月至8月期间,对岘港的60户家庭进行了环境参数测量和热感觉调查。尽管位于沿海地区,但房屋通风不良,室内温度往往高于室外温度。然而,大多数居民对他们的室内条件表示满意。发现PMV指数在预测使用混合模式冷却方法的房屋热感觉方面是无效的。一小部分受访者可能已经调整了他们的期望,以适应他们实际的室内热环境。该研究为岘港住宅的室内热条件和居民的感受提供了深入的见解,以进一步节能举措和家庭热舒适。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Energy and Buildings
Energy and Buildings 工程技术-工程:土木
CiteScore
12.70
自引率
11.90%
发文量
863
审稿时长
38 days
期刊介绍: An international journal devoted to investigations of energy use and efficiency in buildings Energy and Buildings is an international journal publishing articles with explicit links to energy use in buildings. The aim is to present new research results, and new proven practice aimed at reducing the energy needs of a building and improving indoor environment quality.
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