الفهرس 
Upgrading existing educational buildings to a zero-net energy
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Abstract
In this thesis, proposed strategies are developed and applied to a building existing in Egypt. These strategies aimed to improve the building energy efficiency and to reduce the energy consumption and show the effects of adding renewable energy system to this building. The study utilized a case study for an educational building existing in El shorouk city in Egypt, Initially, it studied the characteristics of the building and its load profile along with its meteorological. The first phase of the proposed solution is to implement some strategies to minimize energy used for building lighting, air conditioning and improve the load profile. The cost analysis is done for all applied strategies in addition to estimate saved energy for each strategy. The second phase of the solution is to include a PV system connected to the Grid in the building. The PV-system is simulated using HOMER software in order to choose the most economical and friendly environmental renewable energy system to be integrated into the building to turn it into (NZEB). The PV SYST software is used to get the suitable arrangement of the PV system, which chooses to be added to the building under study. An economic study is applied by HOMER for different PV systems to get an adequate size. This economic study considered the cost of energy and determined the payback period