Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Analysis of thermal comfort in a complex atrium under current and future climatic conditions
Because of their multiple functions atria have become very popular among low-energy buildings. In terms of energy efficiency their most significant function is probably their ability to induce stack ventilation and act as a buffer zone for surrounding offices. The purpose of this study was to investigate the thermal performance of a naturally ventilated case study atrium under current and future climatic conditions and their impact on thermal comfort. Thermal comfort conditions under current climatic conditions was estimated through field measurements of Dry Bulb Temperature ( C) and Relative Humidity (%) while possible impacts of global warming were estimated through analysis of dynamic simulation results from TAS with the help of a DSY (Design Summer Year) weather file. In order to understand better the effect of several design characteristics on the thermal performance of the atrium, different simulations were run in TAS initially including and afterwards lacking those design characteristics. The characteristics found significant to be studied in the certain way involved the large internal gains occurring from the basement plant room and the protection border around the cafe area. Conclusions on the effect of the cafe entrance on thermal conditions in the atrium were drawn from a single simulation as it was allowed to do so by its operation schedule. What occurred from this study is that the cafe area of the atrium space does overheat and this tendency will increase significantly in the future. To the overheating, the gains occurring from the plant room have the most critical contribution. However, even though ambient temperatures might seem high, the corresponding dry resultant temperatures that are closely related to thermal comfort, are reduced by the enhanced air flow resulting from the excess heat gains from the basement plant room. Their existence helps maintain internal temperatures higher than external during hot spills thus maintaining the stack for longer. In reducing overheating in the cafe area ...
Analysis of thermal comfort in a complex atrium under current and future climatic conditions
Because of their multiple functions atria have become very popular among low-energy buildings. In terms of energy efficiency their most significant function is probably their ability to induce stack ventilation and act as a buffer zone for surrounding offices. The purpose of this study was to investigate the thermal performance of a naturally ventilated case study atrium under current and future climatic conditions and their impact on thermal comfort. Thermal comfort conditions under current climatic conditions was estimated through field measurements of Dry Bulb Temperature ( C) and Relative Humidity (%) while possible impacts of global warming were estimated through analysis of dynamic simulation results from TAS with the help of a DSY (Design Summer Year) weather file. In order to understand better the effect of several design characteristics on the thermal performance of the atrium, different simulations were run in TAS initially including and afterwards lacking those design characteristics. The characteristics found significant to be studied in the certain way involved the large internal gains occurring from the basement plant room and the protection border around the cafe area. Conclusions on the effect of the cafe entrance on thermal conditions in the atrium were drawn from a single simulation as it was allowed to do so by its operation schedule. What occurred from this study is that the cafe area of the atrium space does overheat and this tendency will increase significantly in the future. To the overheating, the gains occurring from the plant room have the most critical contribution. However, even though ambient temperatures might seem high, the corresponding dry resultant temperatures that are closely related to thermal comfort, are reduced by the enhanced air flow resulting from the excess heat gains from the basement plant room. Their existence helps maintain internal temperatures higher than external during hot spills thus maintaining the stack for longer. In reducing overheating in the cafe area ...
Analysis of thermal comfort in a complex atrium under current and future climatic conditions
Laskari, M (Autor:in)
01.11.2008
Doctoral thesis, UCL (University College London).
Hochschulschrift
Elektronische Ressource
Englisch
DDC:
690
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