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Abstract
This thesis discusses the problem of lacking the application of climatic design in the professional
practice of Architecture and Urban Design. it suggests using (Computer Aided Climatic Design) as a solution to
the complexity of the quantitative design process.
After evaluating examples of simulation tools, it suggests developing a new (Collective) software tool that
supports the visual way of thinking used by architects, and consists of a set of programs that work in close cooperation,
the thesis describes its object oriented structure in detail.
As an example of this concept, two programs were developed. A program to calculate and visualize the solar Path
and the quantity of radiation, the other simulates and evaluates the behavior of shading devices for windows.
Based on the visualization of solar path, a new method for shading west windows using tilted sun breakers was developed,
when evaluated, sun breakers tilted by 60?°? proved capable of
preventing solar radiation during summer and
passing it during winter in Cairo. which introduce a new dimension in design of
sun breakers
Another application of the quantitative approach on Urban tissue approved the efficiency of linear tissue facing
north/south in handling solar radiation, compact tissues shows good effects if roofs were shaded, preferably by
plants.
Although the importance of the Climatic Design is widely known among Architects and Urban planners, it is rarely
applied in the professional practice, the thesis analysis this problem, emphasizes the importance of quantitative
evaluation of the proposed Climatic Designs to solve the Conceptual Conflicts, and suggests using the approach
of (Computer Aided Climatic Design) as a solution to the complexity of the Design process.
The Concept is more advanced than (Computer Simulation) of thermal behavior of buildings, which is widely used
to evaluate the proposed solutions, the Climatic-CAD Concept recommends using Computer in the three phases of design:
(Understanding the design problem, suggesting solutions, and appraising the optimum solution). that includes visualizing
the climatic Inputs and suggested solution.
The thesis evaluates the compliance of the currently used simulation tools with this concept, and suggests developing
a new software tool that is (Collective) in nature, and consists of a set of tools that works in close cooperation,
and describes its object oriented structure in detail.
As an example of this concept, two programs were developed as part of the research. A program to calculate and
visualize the solar Path and the quantity of solar radiation, the other program simulates the behavior of shading
devices for windows.
As an application of these programs, the problem of shading the west windows was studied, the traditional recommended
shading device for west and east windows was vertical louvers.
Sun breakers, but it was not as efficient and selective as the horizontally louvered sun breakers at the south
facades.
The thesis suggests using tilted louvers for the west facades in Cairo, the best angle was 60 degrees to make the
louvers parallel to the solar path at the west direction, the rotation of louvers about its axis gives the louvers
the required selectivity.
by comparing the commonly used shading devices like vertical louvers: Arabesque, Ornamental gypsum grills, the
tilted louvers surpassed their performance by far, which introduce a new dimension in design of sun breakers.
As an application to the concept of quantitative evaluation on urban scale, a comparison was held between four
alternatives of urban tissue, which prove that using linear rows of buildings facing north and south gains the
least solar radiation at summer time, and gains the most at winter Compared to Isolated buildings, linear rows
facing east-west and the compact tissue.
The compact tissue shows a good performance for the middle floors, by shading the roofs, its overall performance
is highly improved and can be an efficient solution.
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