Abstract
This paper was prepared within the program of a national action plan for energy efficiency, where a building code will be prepared within this program in Libya. The goal of this work is to build a simulated environment that can accurately assess the energy consumption of a six-person, one-story family house. The simulation will consider the hot water heating system, the cooling and heating systems and the selection of building materials that help conserve energy. The TRNSYS model is built and programmed to evaluate system performance on an hourly basis throughout the year. As a result of using an insulating material for the building envelope, the cooling load of the building loads were reduced by 55% compared to the original design of the project. In addition, a hot water solar heater is used to produce around 2546 kWh (with solar fraction of 96%) of hot water yearly. A 15-kW roof top PV system is designed for this house. The total electric energy produced from this system is 25424 kWh. This electrical energy generated by the solar PV system is sufficient to cover the loads of air conditioning, heating, and the auxiliary heating element in the solar water heater. The surplus of electricity generated by PV system can be exported to the public network in non-summer months.