METRO STATION · KUKULLAGA, BILBAO, SPAIN
RENOVATION
Onyx Solar replaced the existing glass envelope of the Kukullaga subway station in Bilbao with solar photovoltaic glass. This project involved installing double laminated safety glass panels in diamond shapes varying across 35 different sizes. The original glass lacked adequate sun control properties and this deficiency resulted in discomfort for subway's users & workers due to high temperatures so the replacement was a must. The installation of crystalline silicon photovoltaic glass solved this issue by eliminating the greenhouse effect without sacrificing the natural light entrance thanks to a perfect balance between the g-value and visible light transmittance that was achieved thanks to a cell density totally customized for this building that also allows the station to produce a great amount of solar energy on-site. This upgrade not only enhances the energy efficiency of the station reducing drastically the consumption of air conditioning but also prioritizes the comfort and well-being of station travellers by mitigating the previous discomfort caused by excessive heat.
The photovoltaic glass chosen for this project met the client’s specific requirements, achieving at least 40% visible light transmittance and a 40% solar factor, ensuring that natural light could still enter the station while maintaining effective solar control. This balance is crucial for a space like a metro station, where user comfort and energy efficiency must go hand-in-hand. Additionally, each square meter manufactured for this project delivers a nominal power of 125 Wp, contributing significantly to the station's energy independence. The incorporation of this advanced photovoltaic glass technology has made the Kukullaga station a reference point in sustainable architecture and urban infrastructure.
The combination of energy generation and superior thermal performance perfectly addresses the client's needs while emphasizing the station’s commitment to environmental responsibility. The project exemplifies how cutting-edge technology can be seamlessly integrated into transportation infrastructure, enhancing both functionality and sustainability.
"To address the temperature problem we were experiencing at the station, we decided to make a change in the station's glazing. Instead of using conventional glass, we installed photovoltaic glass that not only allows light to pass through, but also generates electricity by taking advantage of solar radiation.
This change not only contributes to improving comfort on hot days, but also helps reduce the station's energy consumption, providing a more sustainable and efficient solution."
Metro Bilbao is a premier urban transportation system that plays a pivotal role in connecting the greater Bilbao metropolitan area. Known for its modern design and efficient service, the network is essential for facilitating smooth and reliable commuting throughout the region. Metro Bilbao’s forward-thinking approach also incorporates advanced technologies to enhance both functionality and environmental responsibility. Through the use of renewable energy sources and innovative building practices, it ensures that public transport remains a sustainable choice for the future while maintaining high standards of performance and convenience.
