Comparative Analysis of Autoclaved Aerated Concrete (AAC) vs. Traditional Building Materials for Energy-Efficient Green Building

Thu, 29 Aug 2024 00:00:00 +0000

This study evaluates a product that generates less pollution than traditional construction materials, focusing on its entire lifecycle from production to operational use. It highlights reductions in energy consumption and economic savings, emphasizing the environmental benefits of new materials. The research includes a case study of a five-story apartment, where autoclaved materials resulted in approximately 10% energy savings. During production, pressed bricks required 62 gigajoules to construct 100 square meters of wall, compared to 3.6 gigajoules for autoclaved blocks, indicating that pressed bricks consume 15.5 times more energy. Transportation also showed differences due to the lower weight of autoclaved blocks, with pressed bricks consuming 1.8 gigajoules of energy compared to 0.45 gigajoules for autoclaved materials. In implementation, the labor and time required for autoclaved materials were half that needed for brick walls in Iran. A high correlation (R²=0.92) was found between thermal conductivity and density for AAC. The production of pressed bricks, which demands very high temperatures, leads to a fivefold increase in fuel consumption. Additionally, because autoclaved blocks require less material per square meter, there is a tenfold increase in fuel consumption per square meter. The study underscores the substantial benefits of adopting autoclaved aerated concrete in construction, both in terms of environmental impact and energy efficiency, highlighting its potential for more sustainable and cost-effective building practices.

Repowering of a wind energy production field - case study of SIDI-DAOUD field in northeastern Tunisia

Hassen Ayed Chraiga — Tue, 10 Sep 2024 00:00:00 +0000

Every energy production system, whether conventional or renewable, reaches its final limits after a period of operation predefined by the feasibility study for such a project. Then we'll have to think about renewal to maintain a certain level of reliability and availability as a factor of operational safety. This project seeks of studying the repowering of two 1st phases of wind farm in Sidi-Daoued in north Tunisia, which have reached the end of their life (20 years); it aims to identify three new configurations and to simulate different scenarios to determine which types of turbines are the most optimal for a repowering project. The three types of wind turbine selected were Vestas 4200kw, Nordex Acciona and Siemens-Gamesa, each with a power output of 4500kw. These are the best-known types of wind turbine in the world, and the heights of the hubs are very similar, at around 105m, so that a comparison can be made between the three models. Therefore, the average speeds are around 7.8 m/s2.The final number of turbines to be installed on site is around 13 turbines for the three scenarios, but the result favours the second scenario with Siemens-GAMESA wind turbines, where the annual production can exceed 210.1 GWH with a capacity factor equal to 41 percent.

Journal of Technology Innovations and Energy

Comparative Analysis of Autoclaved Aerated Concrete (AAC) vs. Traditional Building Materials for Energy-Efficient Green Building

Repowering of a wind energy production field - case study of SIDI-DAOUD field in northeastern Tunisia