Window-opening behavior in Chinese residential buildings across different climate zones

Lai, Dayi; Jia, Susu; Qi, Yue; Liu, Junjie

doi:10.1016/j.buildenv.2018.06.030

Cited by 88 publications

(36 citation statements)

References 29 publications

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“…The window opening duration increased as the outdoor became warmer. For C regions, the duration started to decrease when the daily mean outdoor air temperature was larger than 24 o C. When examining the natural ventilation duration under the same daily average outdoor air temperature for various climate regions, it is interesting to find that the NV duration increased from north to south, which corresponds to the findings of our previous study [17]. This regional difference in NV duration may be the result of residents' long-term exposure to the environment.…”

Section: Resultssupporting

confidence: 77%

Investigation of Ventilation Behaviors in Mechanically Ventilated Residential Buildings in China

Liu

Dai

et al. 2019

E3S Web Conf.

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Mechanical ventilation system provides a more reliable, controllable, and comfortable way of ventilation than natural ventilation through an opened window. However, the operation of mechanical ventilation system cost energy. This study investigated the usage of natural and mechanical ventilation in 46 apartments in ten cities across five different climate zones in China by on-site monitoring and questionnaire survey. On average, the daily natural and mechanical ventilation durations were 11 hours and 7.2 hours, respectively. Large differences existed among climate regions and seasons. From north to south, as the climate became warmer, the usage of natural ventilation increased. From seasonal perspectives, natural ventilation duration was the longest in summer and the shortest in winter. The trend of mechanical ventilation usage was opposite to that of natural ventilation. Generally, as the outdoor air temperature increased, the duration of natural ventilation increased and the duration of mechanical ventilation decreased. This study proposed an outline to use thermal comfort, health, and energy saving as three motivations to analyze ventilation behaviors. Based on the obtained results, suggestions were made for achieving healthy, thermally comfortable, and energy efficient ventilation in residential buildings.

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Section: Resultssupporting

confidence: 77%

Investigation of Ventilation Behaviors in Mechanically Ventilated Residential Buildings in China

Liu

Dai

et al. 2019

E3S Web Conf.

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“…Figure 15(a), when opening a window is the only available means ventilation, people would reduce natural ventilation to avoid thermal discomfort when the outdoor is too cold or too hot, without addressing the possible adverse health effects of insufficient ventilation. Such phenomenon is demonstrated in our previous analysis in homes without mechanical ventilation [28]. When mechanical ventilation is available in addition to natural ventilation, as shown in Figure 15(b), people would be willing to spend money on energy to increase mechanical ventilation usage and compensate for the reduction in natural ventilation.…”

Section: Reasons For Not Using Natural and Mechanical Ventilationmentioning

confidence: 61%

Ventilation behavior in residential buildings with mechanical ventilation systems across different climate zones in China

Lai

Liu

et al. 2018

Building and Environment

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A mechanical ventilation system in a residential building provides a more reliable, controllable, and comfortable means of ventilation than natural ventilation through an open window. However, the operation of a mechanical ventilation system consumes energy and may generate noise and secondary air pollutants. Thus, it is worthwhile to study residents' actual ventilation patterns. This study investigated the usage of natural and mechanical ventilation in 46 apartments across five different climate zones in China by on-site monitoring and a questionnaire survey. On average, the daily natural and mechanical ventilation durations were 11 hours and 7.2 hours, respectively. Large differences existed among climate regions and seasons. From north to south, as the climate became warmer, the usage of natural ventilation increased. From a seasonal perspective, the natural ventilation duration was the longest in summer and the shortest in winter. The trend of mechanical ventilation usage was opposite to that of natural ventilation. Generally, as the outdoor air temperature increased, the duration of natural ventilation increased and the duration of mechanical ventilation decreased. This study found that occupants prioritized their thermal comfort needs over healthy indoor air quality (IAQ). However, occupants were willing to spend money on energy when the health requirement could be met by mechanical ventilation. This study provides further understanding of occupants' ventilation behavior, and the results can serve as more accurate boundary conditions for analyses of IAQ, energy consumption, and thermal comfort in Chinese residential buildings.

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“…To understand occupant behavior patterns, field monitoring and survey studies of occupant behavior and related environmental factors have been conducted. For example, occupancy (Page et al 2008;Li and Dong 2017), window opening (Yao and Zhao 2017;Andersen et al 2013;Lai et al 2018), light switching Reinhart 2004;Zhu et al 2017), air-conditioning (Yao 2018b;Ren, Yan, and Wang 2014), shade/blind adjustment (Reinhart and Voss 2003;Haldi and Robinson 2010) have been investigated and different types of occupant behavior models have been developed for integration into building performance simulation tools. Modern office buildings are mostly designed with large windows for a better daylighting performance, and some of them have glazed curtain walls.…”

Section: Introductionmentioning

confidence: 99%

Minimum number of simulation runs for reliable building energy and peak load prediction at different building scales: a study on stochastic shade adjustment

Yao

2020

Journal of Asian Architecture and Building Engineering

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This paper investigates the impact of uncertain shade behavior on three facades (east, south and west) on energy performance. A previously developed stochastic shade behavior model and an occupancy model were used to conduct building co-simulation for determining energy-related performance uncertainty (annual energy demand and peak heating/cooling loads) at different building scales. Statistical test and Monte Carlo random sampling techniques were used to determine the required minimum simulation runs for obtaining reliable annual energy performance and peak loads. The results show that there is no significant difference in shading performance among seasons and orientations. In China, most newly-built office buildings are high-rise ones and thus, the influence of manual shades on the energy uncertainty of these office buildings can be neglected and a single simulation run is enough to obtain reliable annual heating, cooling and total energy demands. While for peak heating/cooling loads, the conclusion is different from annual energy demand and at least five simulation runs are required to obtain peak heating/ cooling loads at building scales. For a smaller building, 120 simulation runs are suggested for peak load determination.

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Window-opening behavior in Chinese residential buildings across different climate zones

Cited by 88 publications

References 29 publications

Investigation of Ventilation Behaviors in Mechanically Ventilated Residential Buildings in China

Investigation of Ventilation Behaviors in Mechanically Ventilated Residential Buildings in China

Ventilation behavior in residential buildings with mechanical ventilation systems across different climate zones in China

Minimum number of simulation runs for reliable building energy and peak load prediction at different building scales: a study on stochastic shade adjustment

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