الفهرس 
الإطار العام للدراسة البحثيةيوجد فقط 14 صفحة متاحة للعرض العام
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المستخلص
from the standpoint of global interest in saving energy in various types of buildings and
their requirements for granting building permits, this study deals with raising the energy
efficiency of university building facades that are currently spreading in Egypt without
thermal parameters of the building façade. The methodology of the study extracts from
previous studies the most important techniques of modern materials for façades,
especially glass ones, to assess thermal loads. The study uses the simulation program
(Design Builder) to test the analytical sample, which was extracted from the field survey
of 10 modern university buildings located in the Greater Cairo region, to compare it by
applying internationally developed materials with the aim of increasing the thermal
performance of the façades. Facade simulation modeling includes internal void type,
exterior environmental orientation, hole-to-wall ratio, physical properties of materials
used and proposed to make retrofitting taking into account their economic viability. The
results of the application indicate that the best outcomes are ranked in line with different
study cases.
In the case of the inputs of a commonly used classroom, the separation ratio is 1.5: 1,
the use of windows with an opening of the wall area of 30%, the application of a wall of
hollow concrete bricks with a thickness of 20 cm and clear glass of 6 mm, the best
outputs of the retrofit of the walls came, but by using traditional insulation materials, it
was found that the best Wall thermal resistance 1 for different directions, where saving
in energy consumption ranges between 4-5%, or by using high-performance insulation
materials as these materials depend on technology in the industry where a balance was
worked out between the highest rates of energy savings and the economic cost. The best
material to use is a phase variable material (PCM) as it contributes to reducing energy
consumption in some directives by 11%, suggesting in the case of windows a set of
solar thermal gain coefficients (0.2-0.8) came to the best outputs for retrofitting
windows when applying coefficient glass Solar thermal gain 0.2, where the savings in
energy consumption for the different directions ranged between 18% -37% according to
the different quantities of thermal loads on the steering. When using windows with an
opening of 60% of the wall area and applying a hollow cement brick wall with a
thickness of 20 cm and clear glass of 6 mm, the best retrofit outputs for walls were a
phase-variable material only, so the saving rate was between (6% -12%) and not
commensurate within this case, the application of any of the insulation materials,
whether traditional or high-performance materials, as the saving rate is very small and
not commensurate with the cost, but when proposing treatments for windows through
the application of a set of solar thermal gain parameters (0.2-0.8), the best outputs for
the retrofit of windows came at The application of glass with a solar thermal gain
coefficient of 0.2, where the rate of savings in energy consumption for the different
directions ranged between 30% -50% according to the different quantities of thermal
loads on the steering. When using windows with an opening of the wall area of 90% in
the case of the inputs of this percentage, the wall ratio was very weak and almost non-
existent for that retrofit based on the proposals of windows when proposing a set of
solar thermal gain coefficients (0.2-0.8) came the best outputs for retrofitting windows
when applying Glass with a solar thermal gain coefficient of 0.2, where the rate of
savings in energy consumption for different directions ranged between 38% -60%.
The digital modeling program is designed to contain a database that includes the results
of the Design Builder simulation program, in order to be considered as a standard tool
for both administrative authorities and designers, in order to verify the thermal
suitability of university structure patterns before implementation in the future.