The economic and environmental impact of feeding a school with renewable energy

One of the most serious problems of the twenty first century is global warming. Therefore, transformation plans for renewable energies have become a necessity not a luxury. Traditional ways of producing electrical energy is one of important source that cause greenhouse gases which contribute to global warming, so the best way to limit damage the environment is to use renewable resources, but it faces some challenges' such as its cost and the suitability climate conditions. In this paper we designed a renewable energy system based on wind and solar energy to feed al-kumishat high school in Gharyan city, Libya. We used r (Hybrid Optimization of Multiple Electric Renewables) HOMER program to design and simulate the system to study the technical, economic and environment impacts on the system. The study was conducted on a group of technical, economic factors and variables including three scenarios. The best scenarios are the third scenarios, which is capacity shortage is 10% of 25,527 Kwh/year electric load and peak load at 7.79 Kw. So we can reduce the Emission of Co2 gas in the atmosphere by about 25,093 kg per year. Also this scenario achieves the lowest level of COE by 0.432$ and a NPC by 55649$. This recommended system configuration includes a 0.938 Kw photo voltage array, three 3.3 Kw turbines and 13 Hoppecke of 1500 AH. Wind energy contributes 90.1% annually, which solar energy provides 9.92%. The system is estimated to have an Excess electricity of 60.5%. Keywords: Renewable energies; Wind energy; Solar energy; Reduce the Emission; School; Libya; HOMER.