WITHDRAWN: Optimizing smart building energy systems for sustainable living: A realistic approach to enhance renewable energy consumfaption and reduce emissions in residential buildings

Abstract

The presented a groundbreaking and economical approach to enhancing the sustainability of residential buildings by optimizing smart building energy systems. This approach, which is instrumental in advancing the shift towards a sustainable future, focuses on maximizing occupant comfort while markedly diminishing the energy footprint and emissions of the built environment. The study offers a comprehensive techno-economic and environmental analysis of the system performance conducted on residential apartments in Baghdad, Iraq. The results are promising, showing that the system successfully transfers 75.6 MWh of renewable electricity to the local grid and utilizes an additional 120.42 MWh for the internal needs of the building and operation of electrical components. A key component of the system is the biomass heater, which meets over 70.2% of the heating demand, proving particularly effective during periods of low solar power availability and high electricity costs. This highlights the importance of integrating diverse energy sources to reduce dependence on the grid. The results also reveals that the costs associated with energy consumption are substantially offset by the revenue generated from selling excess renewable energy during high-production periods. This results in average monthly energy costs being maintained below $151.2/MWh over several years. This cost-efficiency is achieved by eschewing batteries and optimizing the dimensions of the heat pump. Additionally, the system demonstrates a low emission index of 12.85 kgCO2/MWh, indicating a potential reduction in CO2 emissions by 75.6 TCO2/year compared to traditional energy mixes.