Investigation of the technical-economic contribution of renewable energy and energy efficiency: Lebanese context

Fossil energy is a major problem that disturbs the world. So replacing this kind of energy with another cheapest, harmless and that last forever become a strategic question. A big question still running the minds of the workers and investors in this sector, which type of renewable energy we should apply? At which cost? What will be the payback period and the return on investment? The aim of this paper is to highlight on the reduction of the energy profile for facilities from the Lebanese context by a case study for a residential complex.