Results 251 to 260 of about 364,970 (284)
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Renewable Energy, 2012
Abstract The contribution raises a question of how good is the standard method for estimating the diffuse irradiation on a tilted surface. This is done with a correction of the diffuse irradiation measurement by a sky-view factor. Many different expressions for the sky-view factor can be found in the literature.
Klemen Zakšek
exaly +2 more sources
Abstract The contribution raises a question of how good is the standard method for estimating the diffuse irradiation on a tilted surface. This is done with a correction of the diffuse irradiation measurement by a sky-view factor. Many different expressions for the sky-view factor can be found in the literature.
Klemen Zakšek
exaly +2 more sources
Sky-view factor approximation using GPS receivers
International Journal of Climatology, 2002AbstractA technique is described which allows the real time measurement of sky‐view factors by proxy. A simple and inexpensive global positioning system (GPS) receiver is used to acquire satellite visibility data, which is then used to develop indices related to the sky‐view factor of a location.
Lee Chapman
exaly +2 more sources
International Journal of Climatology, 2013
ABSTRACTThe sky view factor (SVF) is a commonly used indicator in research fields of urban microclimate such as the urban heat island (UHI). Analytical methods have been widely adapted in SVF estimation with the development of accurate three dimensional (3D) data, in which, however, the sky radiance is usually assumed to be isotropic. In this study, we
Shanyou Zhu, Huade Guan, Roger W Clay
exaly +3 more sources
ABSTRACTThe sky view factor (SVF) is a commonly used indicator in research fields of urban microclimate such as the urban heat island (UHI). Analytical methods have been widely adapted in SVF estimation with the development of accurate three dimensional (3D) data, in which, however, the sky radiance is usually assumed to be isotropic. In this study, we
Shanyou Zhu, Huade Guan, Roger W Clay
exaly +3 more sources
The effect of sky view factors on optimized photovoltaic fields
Journal of Renewable and Sustainable Energy, 2018Photovoltaic (PV) fields deployed in multiple collector rows, with two modules one on the top of the other, experience uneven incident diffuse radiation due to the difference in the modules' sky view factor. It is plausible that the two modules may be installed with different inclination angles to obtain an improved field design compared to a common ...
J. Appelbaum, A. Aronescu
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Sky view factors in forest canopies calculated with IDRISI
Theoretical and Applied Climatology, 2001The sky view factor (SVF) is used in forest, road and urban climatology to characterise radiative properties. We now propose a method suitable for forest canopies using the raster based and commercially available software IDRISI. It uses quadratic pixels in rows and columns in a scanned equiangular fish-eye image.
B. Holmer, U. Postgård, M. Eriksson
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Derivation of sky-view factors from lidar data
International Journal of Remote Sensing, 2012The use of Lidar (Light Detection and Ranging), an active light-emitting instrument, is becoming increasingly common for a range of potential applications. Its ability to provide fine resolution spatial and vertical resolution elevation data makes it ideal for a wide range of studies.
Chris Kidd, Lee Chapman
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2020
Il contributo descrive l'evoluzione e i campi di applicazione del parametro adimensionale Sky View Factor, con particolare riguardo agli studi sugli effetti territoriali del global warming.
Francesco Alberti, Giulia Guerri
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Il contributo descrive l'evoluzione e i campi di applicazione del parametro adimensionale Sky View Factor, con particolare riguardo agli studi sugli effetti territoriali del global warming.
Francesco Alberti, Giulia Guerri
openaire +1 more source
Effect of Sky View Factor on Outdoor Temperature and Comfort in Montreal
Environmental Engineering Science, 2014Abstract The relationship between the sky view factor (SVF) and the urban heat island (UHI) effect in Montreal is explored, by assessing the effect of SVF on air temperature ( T a ) and mean radiant ...
Yupeng Wang, Hashem Akbari
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A technique for massive sky view factor calculations in large cities
International Journal of Remote Sensing, 2018In many applications, such as urban physics simulations or the study of the solar impact effects at different scales, complex 3D city models are required to evaluate physical values.
David Muñoz +3 more
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Impact of Sky View Factor on Outdoor Thermal Comfort
Cities are vulnerable to temperature changes due to the inappropriate urbanization process causing Urban Heat Island effect, which exacerbates the instability of the thermal environment and the risk of human heat exposure. The 2021 IPCC Sixth Assessment Report indicates a 1.09°C rise in global average temperature from 2011 to 2020, along with increasedPooja Solanki, Lilly Rose Amirtham
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