The Urbanist Reusing waste heat, The British Library’s solar project and India’s stepwells
Apr 10, 2025
In this discussion, Christophe Williams, CEO of Naked Energy, dives into innovative solar thermal solutions that are helping reduce energy costs and carbon emissions. Geetan Jali Krishna highlights the historical significance of India's stepwells and their potential in addressing modern water challenges. Felicity Macefield shares insights on the integration of solar technology at the British Library, balancing heritage with sustainability. Together, they explore the transformative potential of renewable energy and ancient architecture in urban development.
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Waste Heat Potential
- Waste heat is energy produced but not used for its intended purpose, like excess heat from buildings.
- Capturing it can lower energy bills and contribute to decarbonization efforts, potentially powering 90% of residential buildings across the EU and UK.
Early Waste Heat Capture Examples
- Older combined heat and power plants (CHP) and district heating networks like Battersea Power Station demonstrate early waste heat capture.
- Modern examples include using data centers and the London Underground's Northern Line to power buildings.
Fifth-Generation Energy Networks
- Bankside Yards will use a fifth-generation energy network, an all-electric, low-temperature system that integrates heating and cooling.
- This system absorbs waste heat and redistributes it efficiently between different building uses, minimizing waste.