الفهرس 
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Abstract
Expansion and urban development in Egypt have led to the main problem which is increased energy consumption and it sometime comes at the expense of green areas. For example, it is possible to dispense with large green areas and trees in order to develop the road network.
Administrative buildings are one of the main energy consuming entities in Egypt. so the aim of thesis is to rationalize energy consumption in administrative buildings, and also to increase green spaces in Egypt.
Therefore, the thesis examines the types of Vertical greenery systems (VGS) in detail, their use, structure and technological systems for it. The main goal is to demonstrate the effectiveness of vertical green systems in Egypt through a simulation of an administrative building using the Design Builder program.
The thesis will discuss the issue through two main parts.
Firstly, theoretical and analytical study, based on a comprehensive literature review of vertical green systems and explain their importance, their construction systems, how they work, drainage and irrigation, etc.
As well as analyzing energy consumption data within the administrative buildings in Egypt. And explain to what extent those buildings consume energy. And how it can be extensively reduced through vertical green systems.
Secondly practical study, based on DesignBuilder simulation. A three-story administrative building is simulated with different scenarios. A Base scenario with zero greenery which will be compared to two different scenarios that applied a vertical green system.
The first scenario will use VGS on 100 percent of the southern façade of the building while the second scenario, will use 70 percent of the southern façade to be covered with VGS.
Finally, a comparison was made between the three scenarios, and the results show that the first scenario had the lowest energy consumption and saved about 9 percent annually of the annual administrative building’s energy consumption compared to the base scenario.
While the second scenario saved almost 7 percent of the energy consumption annually. So, it was clear that vertical green systems have a significant and effective role in rationalizing energy consumption in administrative buildings.