Interview about Solar Skywalks Energetic Activation of Footbridges, winner of the A' Architecture, Building and Structure Design Award 2020
World's metropolises - like Beijing - have a large number of footbridges traversing busy traffic arteries. They are often unattractive, downgrading the overall urban impression. Designers' idea of cladding the footbridges with aesthetic, power generating PV modules and transforming them into attractive city spots is not only sustainable but creates a sculptural diversity that becomes an eye-catcher in the cityscape. E-car or E-bike charging stations under the footbridges utilize the solar energy directly on site.
View detailed images, specifications, and award details on A' Design Award & Competition website.
View Design DetailsThe initial spark for Solar Skywalks, the concept of transforming urban footbridges into sustainable power generators, emerged from my lifelong fascination with both passive and active solar solutions. I had been exploring ways to implement solar energy in urban settings when the Mayor of Beijing expressed interest in modernizing the city's existing skywalks. This presented an exciting opportunity to marry form and function: to use these structures not only to facilitate pedestrian movement but also to harness the power of the sun.
The vision was twofold. Firstly, Solar Skywalks aimed to integrate photovoltaic solutions into pre-existing structures, highlighting that green innovation can be retrofitted into our current urban landscapes. Secondly, the project aimed to demonstrate that sustainability and aesthetics can go hand in hand. By thoughtfully incorporating solar panels into the design of the bridges, we were able to create visually appealing structures that also serve as active contributors to a more sustainable city.
Absolutely. When we first conceived the Solar Skywalks concept, we knew that accurate energy production estimates would be crucial. To validate our calculations, we engaged in a comprehensive research and testing process, leveraging cutting-edge simulation software designed specifically for photovoltaic (PV) applications.We partnered with a German-Chinese PV company that brought extensive expertise and resources to the table. Their contribution was invaluable, as they provided us with the most appropriate solutions and PV modules for our project.Using the provided PV modules and the simulation software, we were able to create a digital model of a medium-sized Solar Skywalks installation. We then ran a series of simulations, factoring in variables such as average sunlight exposure, climate patterns, and potential shading or obstructions in an urban environment. The software allowed us to predict the energy output of the solar panels under various conditions and across different times of the year.The result of these simulations was the estimate that a medium-sized Solar Skywalks Energetic Activation of Footbridges installation could generate approximately 18,000 KWh of electricity annually. We are confident in these projections, as they are grounded in rigorous research, advanced simulation technology, and the expertise of our PV partners.Of course, actual energy production can vary depending on real-world conditions and factors such as maintenance, but our thorough testing process gives us a solid foundation for what we can expect from Solar Skywalks
The educational aspect of Solar Skywalks Energetic Activation of Footbridges is indeed a unique and vital feature of the project. My previous work on a concept called "Educating Buildings" laid the groundwork for this component. This concept, which I explored in depth in a book I authored in Germany, revolves around integrating communication strategies within sustainable architectural projects to raise public awareness and understanding.When conceptualizing Solar Skywalks, I knew we had a fantastic opportunity to apply the principles of "Educating Buildings." We aimed to create an engaging and informative experience for pedestrians using the footbridges.To implement this, we proposed several solutions. One was the integration of displays and interactive stands at key points along the bridges. These displays provide real-time data on the energy generation of the solar panels, offering tangible evidence of the benefits of renewable energy. We also incorporated visually appealing, bridge-specific information on sustainability and environmental conservation to engage passersby and inspire them to consider their role in building a greener future.The idea was to make these educational elements an integral part of the overall design, ensuring they blend seamlessly with the aesthetic appeal of the solar footbridges. By thoughtfully combining form and function, our aim was to create a captivating and educational experience for all those who use Solar Skywalks.
Since the inception of Solar Skywalks in 2018, we've been able to refine and adapt the concept through mockups in Shanghai and Munich. This process has not only helped us iron out potential issues, but also led to some unexpected discoveries.One of the most surprising aspects was the adaptability of the system to different climate zones. While we initially developed Solar Skywalks with a focus on urban footbridges, the underlying concept of integrating photovoltaic structures into existing infrastructure can be extended to other applications as well. We found that our approach was not only applicable to footbridges, but also to ground-based structures like the "Sunopy" and bicycle paths like "Solaroute".This concept led us to understand the potential of Solar Skywalks as a starting point for a broader range of sustainable infrastructure solutions. By adapting the system to specific climate conditions, we can maximize the energy output and environmental benefits in different locations.Of course, this also presented challenges. Different climates require different considerations, from the angle and orientation of solar panels to the materials used in the structures
Absolutely! The versatility of Solar Skywalks is indeed one of its most fascinating aspects. We were pleasantly surprised to discover that a single, simple rectangular panel shape could be arranged in dozens unique designs while still maintaining system consistency.Our design philosophy behind this accomplishment was rooted in exploration and boundary-pushing. Rather than seeing the single panel shape as a limitation, we viewed it as an exciting challenge to discover just how much diversity and creativity we could achieve within those constraints.It was thrilling to explore the different possibilities, and each new design revealed the incredible potential of working within a set framework. This process also highlighted the elegance and beauty that can be found in simplicity.In the end, our work on Solar Skywalks has shown us that constraints can be liberating, and that pushing the boundaries of what's possible within those constraints can lead to truly innovative and inspiring results
When we first developed Solar Skywalks in 2018, electric mobility was just starting to gain traction. Today, it's a topic of widespread discussion and interest. While the energy produced by a single Solar Skywalk installation may not be enough to significantly impact a city's overall energy needs, it can certainly contribute to powering smaller electric vehicles, particularly e-scooters which are increasingly popular in Asia.The potential for a single Solar Skywalk to power 1,800,000 km of electric scooter travel is significant. But more than that, it serves as a tangible demonstration of the possibilities for integrating renewable energy sources into our urban infrastructure.Our vision is that Solar Skywalks, and similar technologies, can contribute to reshaping urban mobility by providing not just clean energy, but also by inspiring cities to think more creatively about how we power our transportation systems.While the direct impact of Solar Skywalks on the energy needs of a city might be modest, its potential to spark conversations, raise awareness, and drive innovation in sustainable urban mobility is invaluable.
Our approach to creating a comprehensive urban energy solution with Solar Skywalks was deeply rooted in the idea that everything is interconnected. We didn't want Solar Skywalks to be just a standalone source of renewable energy; we wanted it to be a part of a larger, holistic system.This guided our decision to integrate E-car and E-bike charging stations beneath the Solar Skywalks. We saw this as a way to not only provide clean energy but also facilitate the adoption of electric vehicles and bicycles, thereby contributing to a reduction in carbon emissions from transportation.By combining energy generation with charging infrastructure, we aimed to create a closed-loop system where the energy produced by Solar Skywalks directly supports clean transportation.This interconnectedness is at the heart of our vision for a sustainable future, where all elements of our urban environments - from energy generation to transportation - work together in harmon
Our approach with Solar Skywalks was not just about generating renewable energy; we also aimed to create an aesthetically pleasing design that enhances the urban landscape. We believe that sustainability and beauty don't have to be mutually exclusive.The principles demonstrated in Solar Skywalks - combining renewable energy generation with existing infrastructure in a way that adds to the visual appeal of a city - could be adapted to address other urban infrastructure needs. For instance, we could see similar concepts applied to bus shelters, public seating areas, or even building facades.The key is to integrate renewable energy sources into our cities in a way that not only serves a practical purpose but also makes our cities more beautiful and enjoyable places to live.
We're thrilled with the success of Solar Skywalks in Beijing, but we're not resting on our laurels. We believe that design should constantly evolve to incorporate the latest technological advancements and respond to current needs. Our goal is to stay at the forefront of sustainable urban design, continually pushing ourselves to create solutions that are not just functional and beautiful, but also relevant and timely.
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