Energy Performance Evaluation of a near-Zero Energy Solar House Demonstrator
DOI:
https://doi.org/10.22399/ijcesen.633Keywords:
Near Zero Energy Building, Rooftop PV system, Battery energy storage, Energy performance evaluation, Positive-energy houseAbstract
This study evaluates the compliance of a solar house demonstrator with the near Zero Energy Building (nZEB) standard. Initially, high-efficiency passive and active measures were implemented to reduce energy consumption. Subsequently, a combination of a photovoltaic (PV) system with battery energy storage (BES) and a solar water heater was deployed to harness renewable energy sources. The demonstrator's energy performance is evaluated by assessing its energy balance, grid independence, and renewable energy ratio over one year.The findings indicate that the installed PV system produces 4,439.68 kWh annually, which exceeds the estimated household consumption of 3,368.95 kWh/year, resulting in a 30.58% annual energy production surplus. The demonstrator thus surpasses the zero-energy house requirements, effectively operating as a positive-energy building. The PV system supplied up to 71.9% of the energy needs, with the grid providing the remaining 28.10%. The annual energy performance indicators for the demonstrator include a Direct Consumed Ratio (DCR) of 50.76%, a Capacity Factor (CF) of 73.97%, and a Renewable Energy Ratio (RER) of 160.42%.This case study provides insights into optimising the performance of near-Zero Energy Homes, particularly within the specific climatic context of Algeria.
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