Investigating natural ventilation potentials across the globe: Regional and climatic variations

Chen, Yujiao; Tong, Zheming; Malkawi, Ali

doi:10.1016/j.buildenv.2017.06.026

Cited by 159 publications

(74 citation statements)

References 67 publications

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“…The natural ventilation hour (NVH) [1] was employed as an indicator to measure the natural ventilation potential for the case study building at each location. It is defined as the number of hours in a typical year (8760 h) or a typical season (2190 h) during which outdoor weather conditions are suitable for utilising natural ventilation.…”

Section: Natural Ventilation Hourmentioning

confidence: 99%

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Assessment of Natural Ventilation Potential for Residential Buildings across Different Climate Zones in Australia

Tan

Deng

2017

Atmosphere

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Abstract:In this study, the natural ventilation potential of residential buildings was numerically investigated based on a typical single-story house in the three most populous climate zones in Australia. Simulations using the commercial simulation software TRNSYS (Transient System Simulation Tool) were performed for all seasons in three representative cities, i.e., Darwin for the hot humid summer and warm winter zone, Sydney for the mild temperate zone, and Melbourne for the cool temperate zone. A natural ventilation control strategy was generated by the rule-based decision-tree method based on the local climates. Natural ventilation hour (NVH) and satisfied natural ventilation hour (SNVH) were employed to evaluate the potential of natural ventilation in each city considering local climate and local indoor thermal comfort requirements, respectively. The numerical results revealed that natural ventilation potential was related to the local climate. The greatest natural ventilation potential for the case study building was observed in Darwin with an annual 4141 SNVH out of 4728 NVH, while the least natural ventilation potential was found in the Melbourne case. Moreover, summer and transition seasons (spring and autumn) were found to be the optimal periods to sustain indoor thermal comfort by utilising natural ventilation in Sydney and Melbourne. By contrast, natural ventilation was found applicable over the whole year in Darwin. In addition, the indoor operative temperature results demonstrated that indoor thermal comfort can be maintained only by utilising natural ventilation for all cases during the whole year, except for the non-natural ventilation periods in summer in Darwin and winter in Melbourne. These findings could improve the understanding of natural ventilation potential in different climates, and are beneficial for the climate-conscious design of residential buildings in Australia.

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Section: Natural Ventilation Hourmentioning

confidence: 99%

“…Rapid urbanisation has led to a significant increase in building energy usage, which accounts for nearly one third of the total primary energy consumption worldwide [1]. As a key solution to the efficient operation of buildings, natural ventilation plays a significant role in maintaining an acceptable indoor environment [2,3].…”

Section: Introductionmentioning

confidence: 99%

Assessment of Natural Ventilation Potential for Residential Buildings across Different Climate Zones in Australia

Tan

Deng

2017

Atmosphere

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“…The stack effect in buildings plays a positive role in intermediate and cooling seasons by increasing the natural ventilation through the buildings [1,2]. Buildings having an atrium space, large scale factory buildings having a high ceiling combined with operable openings, and solar chimneys are some good examples.…”

Section: Introductionmentioning

confidence: 99%

Resolving Stack Effect Problems in a High-Rise Office Building by Mechanical Pressurization

Song

Cho

2017

Sustainability

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Abstract:In high-rise buildings, the stack effect causes various problems, especially problems related to excessive pressure differences across main entrance doors and elevator doors, particularly in heating seasons. To reduce the stack effect, this study aims to find effective operation schemes for the HVAC systems in a 60-story commercial building, located in Seoul, Korea. Field measurements were conducted to identify the problems related to the stack effect in the building. Computer simulations were conducted to examine the effectiveness of various HVAC operation schemes in reducing the stack effect. Then, an optimum and effective operation scheme was adopted from the computer simulation results and applied in the field. The adopted scheme was used to pressurize the upper zone of the building. Through field application and an adjustment process, a proper amount of air volume was found to effectively pressurize the upper zone of this building, solving the problems related to the stack effect. The required air volume for pressurization was maintained in the building by reducing the volume of the exhaust air (EA) while maintaining a constant volume of outdoor air (OA).

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“…In some climate zones, the use of natural ventilation brings the expected effects [1,2]. However, in the climatic conditions throughout Poland, as well as most other countries of Central and Northern Europe, this ventilation system does not guarantee high energy efficiency.…”

Section: Introductionmentioning

confidence: 99%

Optimisation of Heat Loss through Ventilation for Residential Buildings

Suszanowicz

2018

Atmosphere

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This study presents the results of research on heat loss from various types of residential buildings through ventilation systems. Experimental research was done to analyse the effectiveness of ventilation systems of different types and determine the parameters of air discharged via the ventilation ducts. A model of heat loss from the discharge of exhaust air outside through air ducts has since been developed. Experiments were conducted on three experimental systems of building ventilation: gravitational, mechanical, and supply-exhaust ventilation systems with heat recovery. The proposed model dependencies were used to chart the daily fluctuations of the optimum multiplicity of air exchange for precise control of the parameters of mechanical ventilation systems in residential buildings. This study proves that natural ventilation in residential buildings fulfils its function only by increasing the air flow into the building, and that this incurs significant heat loss from buildings during the heating season.

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Investigating natural ventilation potentials across the globe: Regional and climatic variations

Cited by 159 publications

References 67 publications

Assessment of Natural Ventilation Potential for Residential Buildings across Different Climate Zones in Australia

Assessment of Natural Ventilation Potential for Residential Buildings across Different Climate Zones in Australia

Resolving Stack Effect Problems in a High-Rise Office Building by Mechanical Pressurization

Optimisation of Heat Loss through Ventilation for Residential Buildings

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