Parameter study on performance of building cooling by night-time ventilation

Artmann, Nikolai; Manz, Heinrich; Heiselberg, Per

doi:10.1016/j.renene.2008.02.025

Cited by 104 publications

(69 citation statements)

References 14 publications

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“…Methods of occasionally cooling the vertical intake ducts of passively ventilated buildings, adopting the top-down system both to boost airflows were also discussed (Gage et al 2001). The effect of most important parameters affecting night ventilation performance such as building construction, heat gains, air change rates, heat transfer coefficients and climatic conditions was evaluated including annual variations on the number of overheating degree hours (operative room temperature >26°C) (Artmann et al 2008). A bioclimatic chart was developed for Muscat, Oman which suggested some passive cooling strategies for different months in a year (Al-Azri et al 2013).…”

Section: Introductionmentioning

confidence: 99%

Selection of suitable passive cooling strategy for a subtropical climate

Ahmed

Khan

et al. 2014

Int J Mech Mater Eng

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Background: Passive cooling system has become an attractive option to design and modify homes to achieve thermal comfort. The system provides cooling through the use of passive processes, which often use heat flow paths that do not exist in conventional or bioclimatic buildings. Methods: Six different cities namely Rockhampton, Brisbane, Mackay, Townsville, Charleville and Mount Isa in the hot and humid subtropical climatic zone in Queensland, Australia have been considered for this study. Two main climatic factors such as the temperature and the relative humidity of those cities over a period of around 50 years have been taken into account in order to select the appropriate passive cooling strategy for a specific location.

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Section: Introductionmentioning

confidence: 99%

Selection of suitable passive cooling strategy for a subtropical climate

Ahmed

Khan

et al. 2014

Int J Mech Mater Eng

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“…Night ventilation is designed to start at 8.00 pm, continue all night and end at 8.00 am. In most cases, the application of an air change rate higher than 8 Air Changes per Hour (ACH) does not cause any further improvement in thermal comfort [23].…”

Section: Resultsmentioning

confidence: 99%

Study of Night Ventilation Efficiency in Urban Environment: Technical and Legal Aspects

Maragogiannis¹,

Kolokotsa²,

Maria³

2011

Scientific Journal of Riga Technical University. Environmental and Climate Technologies

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-Night Ventilation is a critical technique of passive cooling, as it combines a significant decrease of cooling demand and improvement of thermal comfort and indoor air quality.The aim of the present paper is to study the technical and legal aspects of night ventilation in urban climatic conditions. The technical part examines the efficiency of night ventilation techniques for urban residential buildings. Moreover, the influence of urban heat island on the night ventilation effectiveness is studied. Urban heat provokes the degradation of urban air quality and causes changes in the urban area microclimate which reduce the night ventilation effectiveness as a passive cooling technique. Moreover, this paper studies the legal framework of energy efficiency in buildings and pinpoints the institutional deficiencies of the existing regulation regarding energy efficiency and passive cooling techniques

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“…Night ventilation rates and energy savings were calculated for the buildings and compared to the energy demand of the unventilated buildings. A typical office room was modelled by Artmann et al [14]. In his study, the effect of different parameters (climate, thermal mass, heat gains, air change rates and heat transfer coefficient) on the effectiveness of night ventilation was evaluated.…”

Section: Night Ventilationmentioning

confidence: 99%

Numerical assessment of night ventilation impact on the thermal comfort of vernacular buildings

2017

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Night ventilation, is one of the most effective passive cooling techniques that may contribute to the improvement of the occupants thermal comfort conditions. Despite the justified effectiveness of night ventilation, few studies quantified its influence on the thermal comfort of vernacular buildings, especially under warm dominant climates. The aim of this study is the investigation of the impact of night ventilation on the thermal comfort of vernacular buildings under summer dominant environmental conditions. The subjects under investigation was one traditional buildings in the city of Nicosia in Cyprus. In terms of this study numerical analysis regarding the thermal comfort of the investigated buildings was performed by employing Energy Plus and the flow solver of Design Builder. The indoor operative temperature distribution, the indoor air velocity and a thermal comfort related index were identified in selected thermal zones of the examined building using night ventilation. The results of this study quantified the potential temperature decrease that can result on vernacular buildings due to the use of night ventilation and revealed some restrictions with regard to the allowed percentage of the opening sizes towards achieving optimal thermal conditions in space. This study aspires to provide useful insight regarding the importance of humans' behavior in terms of enabling night ventilation to vernacular buildings, as well as to con-tribute to the ongoing scientific discussion on this subject.

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Parameter study on performance of building cooling by night-time ventilation

Cited by 104 publications

References 14 publications

Selection of suitable passive cooling strategy for a subtropical climate

Selection of suitable passive cooling strategy for a subtropical climate

Study of Night Ventilation Efficiency in Urban Environment: Technical and Legal Aspects

Numerical assessment of night ventilation impact on the thermal comfort of vernacular buildings

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