A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Development of a simple framework to evaluate daylight conditions in urban buildings in the early stages of design
The thesis proposes a simple method to aid urban designers in the daylighting aspect of the decision-making process in the early stages of design when the outline of the city is defined. As input to this simple method, complex simulations of the urban canyon structure were made. Paper I reports on a study on the simplified representation of the structure of the streets and buildings in cities. From the results in this study, a simple 4-step method was developed to evaluate facades in an urban context based on daylight simulations in which the densities of the urban building layout, external surface reflectances, and facade window areas were varied. The method developed was based on a CIE overcast sky, so it did not consider the effect of building orientation, geographical location, changes of sky distribution, or the time of day on its results. In Paper II , climate-based daylight simulations of the urban structure were introduced. The climate-based simulations consisted of annual simulations of the daylight conditions. These simulations took into account the enormous variations in daylight illuminances during the year as well as geographical location, facade orientation and user occupancy patterns. For these simulations, the luminance distribution of the sky was described by the Perez all-weather sky-model, based on hour-by-hour input of direct and diffuse irradiance from weather data files. This meant that the weather data files used had an important impact on the simulations. In Paper III , the impact of different weather data sets for a given location and of the time-steps applied was therefore investigated. Occupancy patterns also have an important impact on climate-based daylight simulations. The effect of applying occupancy proles of varying complexity was investigated in Paper IV . In the urban planning stage of design, you usually know very little, or nothing, about the future occupants of the building, so it is useful to know whether detailed simulations of occupancy profiles, as opposed to using ...
Development of a simple framework to evaluate daylight conditions in urban buildings in the early stages of design
The thesis proposes a simple method to aid urban designers in the daylighting aspect of the decision-making process in the early stages of design when the outline of the city is defined. As input to this simple method, complex simulations of the urban canyon structure were made. Paper I reports on a study on the simplified representation of the structure of the streets and buildings in cities. From the results in this study, a simple 4-step method was developed to evaluate facades in an urban context based on daylight simulations in which the densities of the urban building layout, external surface reflectances, and facade window areas were varied. The method developed was based on a CIE overcast sky, so it did not consider the effect of building orientation, geographical location, changes of sky distribution, or the time of day on its results. In Paper II , climate-based daylight simulations of the urban structure were introduced. The climate-based simulations consisted of annual simulations of the daylight conditions. These simulations took into account the enormous variations in daylight illuminances during the year as well as geographical location, facade orientation and user occupancy patterns. For these simulations, the luminance distribution of the sky was described by the Perez all-weather sky-model, based on hour-by-hour input of direct and diffuse irradiance from weather data files. This meant that the weather data files used had an important impact on the simulations. In Paper III , the impact of different weather data sets for a given location and of the time-steps applied was therefore investigated. Occupancy patterns also have an important impact on climate-based daylight simulations. The effect of applying occupancy proles of varying complexity was investigated in Paper IV . In the urban planning stage of design, you usually know very little, or nothing, about the future occupants of the building, so it is useful to know whether detailed simulations of occupancy profiles, as opposed to using ...
Development of a simple framework to evaluate daylight conditions in urban buildings in the early stages of design
Iversen, Anne (author)
2013-02-01
Iversen , A 2013 , Development of a simple framework to evaluate daylight conditions in urban buildings in the early stages of design . DTU Civil Engineering Report , Technical University of Denmark, Department of Civil Engineering , Kgs. Lyngby .
Book
Electronic Resource
English
DDC:
690
Evaluation of the daylight conditions at early stages of an urban project
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