In a groundbreaking study published in ‘Buildings’, Mine Sertsöz from the Department of Railway Systems at Eskisehir Technical University has shed light on the potential of Positive Energy Districts (PEDs) in Istanbul. This research addresses an often-overlooked aspect of urban energy systems: the interplay between mobility modes and energy consumption. As cities strive to meet sustainability goals, the integration of renewable energy sources with efficient public transport systems is becoming increasingly vital.
The study reveals that buildings in the European Union account for a staggering 40% of energy consumption and 36% of greenhouse gas emissions. In contrast, transportation contributes 28% of energy use, with road transport alone responsible for 72% of these emissions. Sertsöz’s research proposes a synthetic PED model that not only generates more energy than it consumes but also effectively incorporates renewable energy sources like solar energy, hydrogen, and regenerative braking energy from trams.
“The economic viability of a PED hinges on the cost of hydrogen energy,” Sertsöz explains. The research found that the PED could achieve cost competitiveness with traditional energy grids if hydrogen costs are maintained below $93.16 per megawatt-hour (MWh). However, to minimize CO2 emissions effectively, hydrogen costs would need to be as low as $32.55/MWh. Currently, hydrogen prices hover around $39/MWh, suggesting that while the model is promising, it has yet to reach its full economic potential.
The implications for the construction sector are profound. As urban development increasingly prioritizes sustainability, the demand for buildings that can operate within a PED framework is likely to rise. Architects and developers will need to adapt their designs to accommodate integrated energy systems that can leverage renewable sources effectively. This shift could lead to new standards in construction practices, emphasizing energy efficiency and environmental responsibility.
Sertsöz’s research highlights the potential reduction in CO2 emissions, with the synthetic PED achieving a remarkable drop from 97 tons annually to just 5.74 tons. “This study emphasizes the importance of mobility in achieving energy efficiency,” she notes. The findings advocate for a fundamental rethink of urban planning, where public transportation systems like trams play a crucial role in reducing the overall carbon footprint of a district.
As cities around the world grapple with climate change and energy sustainability, the insights from this research could pave the way for more resilient urban environments. By focusing on the integration of mobility and energy systems, urban planners and policymakers can foster communities that not only consume less energy but also contribute positively to the grid.
For those interested in the technical details and further implications of this research, Sertsöz’s full study can be accessed through the Department of Railway Systems at Eskisehir Technical University. The findings published in ‘Buildings’ provide a critical foundation for future developments in smart cities and sustainable construction practices.