Abstract
Daylight climate studies of the regions is the important process for the basics of theory and design practice of daylight prediction and assessment. As a result, they will give suggested codes, standards and guidelines to achieve the building energy efficiency. An important indicator of the daylight climate is cumulative diffuse horizontal illuminance, since this factor reflects the potential of the daylight climate in the regions and is the stabilized light source. The horizontal illuminance has a closer connection with the solar radiation and are determined by the luminous efficiency under the open sky from solar radiation data. In addition, horizontal illumination levels also heavily dependent on cloudiness statistics of the regions. The purpose of this study is confirmation of the model calculation of luminous efficacy to determine the daylight climate for Hanoi, Vietnam. To achieve this goal, a comparative analysis of luminous efficacy models based on calculated and measured solar radiation data and horizontal illuminance was conducted. Careful consideration of daylight climate data allows us to clarify the daylight-climatic factors and move to the territorial standards of daylight at the modern level. Based on the study, a general review of other climatic factors, such as statistics of solar radiation and cloud cover, was considered. The results of this study have shown that daylight climate in Hanoi characterized by a high level of horizontal illuminance, which causes a high thermal load into buildings. This problem should be developed in future studies of daylight assessment to achieve energy efficacy.
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Nguyen, T.K.P., Solovyov, A., Pham, T.H.H., Dong, K.H. (2020). Confirmed Method for Definition of Daylight Climate for Tropical Hanoi. In: Murgul, V., Pasetti, M. (eds) International Scientific Conference Energy Management of Municipal Facilities and Sustainable Energy Technologies EMMFT 2018. EMMFT-2018 2018. Advances in Intelligent Systems and Computing, vol 982. Springer, Cham. https://doi.org/10.1007/978-3-030-19756-8_4
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