How window ventilation behaviour affects the heat resilience in multi-residential buildings

Schünemann, Christoph; Schiela, David; Ortlepp, Regine

doi:10.1016/j.buildenv.2021.107987

Cited by 23 publications

(9 citation statements)

References 31 publications

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“…Lakhdari et al [157] suggested that the optimal WWRs are 30%, 40%, and 50-60% for north, south, and west/east orientations, respectively. Unfortunately, almost all WWR-related studies focus on residential buildings [158,159] and commercial buildings [156,160]. It should be noted that the interactions between thermal comfort, window-related natural ventilation and energy cost differ between children and adults, which is worth more systematic investigations.…”

Section: Natural Ventilation (Nv)mentioning

confidence: 99%

Interaction between Thermal Comfort, Indoor Air Quality and Ventilation Energy Consumption of Educational Buildings: A Comprehensive Review

Jia¹,

Han²,

Chen

et al. 2021

Buildings

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Thermal comfort and indoor air quality (IAQ) of educational buildings can affect students’ academic performance and well-being and are closely related to ventilation energy consumption. Demands of the indoor environmental quality within the classroom generally vary with the education levels and result in ventilation energy consumption accounting for a considerable proportion of the total energy use in bulk educational buildings. Its huge energy-saving potential is attracting worldwide attention from scholars and governments. Therefore, appropriate operation strategies of ventilation systems should be adopted to effectively reduce energy consumption without sacrificing thermal comfort and IAQ. However, the absence of relevant standards and guidelines for designing a quality classroom environment considering the special features of educational buildings remains an important research question. This study conducts a comprehensive review to determine research gaps and identify future directions for the interaction between thermal comfort, IAQ and ventilation energy consumption for educational buildings. The review results show that: (1) The thermal comfort prediction model should consider the influences of genders, ages and socioeconomic backgrounds; (2) The mixed-mode ventilation coupling the natural and mechanical approaches is preferred given its advantage of lower energy consumption and improved thermal comfort, but its control strategies need further exploration; (3) Optimizing passive design parameters of buildings (e.g., window to wall ratios, window orientations and sun shading installations) can significantly reduce the ventilation demands while maintaining indoor thermal comfort; (4) More studies are required for investigating thermal comfort in educational buildings during the heating period; and (5) IAQ of university buildings clearly requires further studies, especially on bacterial and fungal aerosol pollutants, for a more comprehensive assessment of the built environment.

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Section: Natural Ventilation (Nv)mentioning

confidence: 99%

Interaction between Thermal Comfort, Indoor Air Quality and Ventilation Energy Consumption of Educational Buildings: A Comprehensive Review

Jia¹,

Han²,

Chen

et al. 2021

Buildings

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“…Ventilation is another key factor to help mitigate overheating. It was found that residential buildings were less overheated when windows and doors were fully open during the early morning or evening hours [32]. Furthermore, ventilation factors, including window type, opening time and duration, play an important role in overheating in residential buildings [32].…”

Section: Other Parameters Influencing Overheatingmentioning

confidence: 99%

Research on the Relationship between Thermal Insulation Thickness and Summer Overheating Risk: A Case Study in Severe Cold and Cold Regions of China

Shao

et al. 2022

Buildings

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Given the prediction of global warming, there is a growing concern about overheating in the severe cold and cold regions of China. In the past decades, indoor thermal comfort has been neglected in building practice, while efficiency-oriented improvements have been developed, such as increased insulation of building envelope. An extensive literature review shows contradictory conclusions about whether increased insulation can alleviate overheating. The aim of this research is to conduct simulations based on measured data to reveal the influence of insulation on overheating in dwellings in these regions of China. An unoccupied residential flat was monitored to determine the extent of overheating while eliminating the effects of other contributors, such as natural ventilation. Validated building performance simulations were carried out with altered insulation layer thickness in Integrated Environmental Solutions-Virtual Environment IESVE software to examine its influence on overheating during summertime in five representative cities. The results showed clear evidence of summer overheating in these regions. In Yichun, Harbin, Shenyang, Dalian and Beijing, walls with increased insulation were found to exacerbate overheating in the bedrooms without natural ventilation by 22.5%, 16.6%, 20.3%, 11.8% and 6.9%, respectively, compared to the uninsulated walls. This study provides useful information for building regulations on energy efficiency and thermal comfort.

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“…Night-time ventilation has a major impact on thermal comfort during long periods of hot weather (Schünemann et al, 2021). Accordingly, adequate window ventilation can make a useful contribution to the night-time cooling of rooms.…”

Section: Obstacles To Window Ventilation At Nightmentioning

confidence: 99%

“…Furthermore, it should be mentioned that the window ventilation behavior can also deviate on certain days from the practices stated here, leading to variations in the perceived heat stress over the course of the summer. In addition to user behavior, the physical structure of the building can also greatly determine whether rooms become overheated (Schünemann et al, 2021).…”

Section: Derivation Of Characteristic Ventilation Profilesmentioning

confidence: 99%

“…In contrast, Schünemann et al performed building performance simulations for attic apartments of two multi-residential buildings located in Germany. They concluded that the effect of window ventilation also depends on the building physics of a room (Schünemann et al, 2021). Mavrogianni et al also performed building performance simulations for residential buildings in London under various boundary conditions (e. g. occupant profiles, building geometry and orientation, insulation level, shading) and found that the effect of window ventilation is associated with the insulation level of a building and window shading (Mavrogianni et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

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Window Ventilation Behavior for Overheating Evaluation: Residents’ Survey and Derived Ventilation Profiles

Schiela

Schünemann

2021

Int J. of BES

Self Cite

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Studies have shown that night-time ventilation can greatly reduce indoor overheating during hot spells. Yet the relevant literature is largely silent on which specific time resolved window ventilation behavior can be applied for investigations with building performance simulations. The aim of this article is to close this gap in knowledge. Specifically, a survey was carried out in two German cities Dresden and Erfurt regarding window ventilation behavior on hot (outside temperature > 30 °C) and average summer days to determine how, when and for how long ventilation is actually implemented in residential buildings. The results show that approximately 80 % of respondents ventilate their living rooms and bedrooms mainly at night and/or in the early morning on both hot and average summer days – although the individual window ventilation behavior may vary significantly. The details provided by the respondents were processed to create characteristic window ventilation profiles in order to reflect the individual user behavior more realistically in future studies, especially for overheating evaluations by building performance simulation.

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How window ventilation behaviour affects the heat resilience in multi-residential buildings

Cited by 23 publications

References 31 publications

Interaction between Thermal Comfort, Indoor Air Quality and Ventilation Energy Consumption of Educational Buildings: A Comprehensive Review

Interaction between Thermal Comfort, Indoor Air Quality and Ventilation Energy Consumption of Educational Buildings: A Comprehensive Review

Research on the Relationship between Thermal Insulation Thickness and Summer Overheating Risk: A Case Study in Severe Cold and Cold Regions of China

Window Ventilation Behavior for Overheating Evaluation: Residents’ Survey and Derived Ventilation Profiles

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