טכניון מכון טכנולוגי לישראל
הטכניון מכון טכנולוגי לישראל - בית הספר ללימודי מוסמכים  
M.Sc Thesis
M.Sc StudentAmir Eran
SubjectA Model for Mapping Solar Radiation in Urban
Environment to Support the Design Process
DepartmentDepartment of Architecture and Town Planning
Supervisor Professor Isaac Guedi Capeluto
Full Thesis text - in Hebrew Full thesis text - Hebrew Version


Abstract

An accurate evaluation of solar radiation collected on buildings surfaces can contribute to improving their BIPV performance, thermal conditions and cost effectiveness. However, calculating solar potential in dense urban environments where mutual influence exists between buildings is a difficult, resource-intensive task. Mapping solar radiation is desired by engineers for optimizing solar energy as well as for designers and planners for improving comfort conditions with shading solutions. Multiple software tools are used in the process of modeling solar effects and optimizing BIPV systems. Their main disadvantage is in the division between modeling software and engineering software, without interaction between these two processes. Moreover, these tools are used, most of the time, after the building design is already completed. This work presents a model for mapping solar radiation in urban environment to support the design process. The main intention is to assist architects and urban planners in considering the solar energy potential during the initial design phases, when decisions that mostly impact the solar potential utilization of the building and open areas are made. This model for mapping solar radiation uses analysis and visualization of solar potential as a tool that assist in placing BIPV collectors and improving thermal comfort conditions in open spaces by determining the mutual influences of buildings surrounding these spaces. The leading concept of this work is in presenting the solar energy potential directly on the 3D model itself thus allowing designers to use this evaluative "layer of information" to dynamically improve the design according to different parameters of solar radiation, daylighting and shading. The novelty of this work in comparison with other software environments for calculating solar radiation collection is in the combination of these features:

1.      Uniting 3D modeling environment with solar radiation collection energy simulation process, and displaying the simulation results as an additional information layer on top of the 3D working model.

2.      Development and validation of a quick calculation method which allows multiple fast and accurate evaluations, to quicken the design process.

3.      This tool can be used as a design generator, in creating and testing of multiple design alternatives for urban development, rather than a tool for evaluating the building's energy performance after-the-fact.

4.      The variety of calculated data that is presented to the designer for analysis includes not only statistics of collected radiation and shading, but also the amount of hours of direct sunlight exposure, a very useful feature for sustainable urban planning.