Efficacité énergétique dans le bâtiment : Hybridation des systèmes de production d’eau chaude

This thesis presents a detailed review of the conventional and renewable energy statuses, in Lebanon, as well as of the principal problems facing the electricity of Lebanon Company (EDL). Besides, future electricity generation plan-scenarios for Lebanon are investigated, where multi variables are examined and optimized, namely: cost, environment and tariff. Results reveal that the investment in wind energy and natural gas for power production should be a main concern in the future. In addition, a comprehensive review of different domestic water heating systems is developed, where principal conclusions reveal that heat pump water heaters and solar water heating systems are recommended to be used. Accordingly, a general road map that controls the choice of a water heating system for domestic use from energetic and environmental points of view is developed. Moreover, dynamic simulation model of an air source heat pump water heater is presented and validated. This model is then used to assess the system performance in the Lebanese context, investigate a proposed optimal management model and study the effect of using mini-tubes condensers. Furthermore, a domestic hybrid water heating system is proposed and modeled dynamically. The system is composed of a flat-plate solar collector, air-source/geothermal heat pump water heater, a wind turbine, a battery and a hot water storage tank. Simulations are carried out for typical days of winter and summer of two Lebanese locations, Beirut and Cedars. In addition, an energetic-economic optimal management model is suggested for the proposed hybrid system and applied to the investigated case studies, where reliable results are obtained.