HelioTower — A Vertical Thermo-Solar Plant for the City

 

HelioTower reimagines the traditional concentrated solar power (CSP) plant as part of the city skyline. Instead of spreading mirrors across the desert, the concept stacks the thermo-solar process vertically within a tower. Rooftop heliostats reflect sunlight toward a receiver high above the city, heating a working fluid that stores energy for use day and night. The result is a building that not only consumes energy but generates it—an urban power plant that operates continuously and without carbon emissions.

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The research compares existing large-scale CSP facilities, such as Gemasolar in Spain and Cerro Dominador in Chile, and then adapts their core principles to dense environments like Dubai, Phoenix, and Santiago. Each scenario examines how a tower can function as a local energy hub, supplying adjacent buildings while minimizing the land use and transmission losses associated with remote solar fields. One HelioTower operating at full capacity could offset up to 30,000 tons of CO₂ annually while powering entire city blocks.

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Beyond the main receiver, the tower integrates complementary systems such as façade-mounted hot-water pipes, PV panels on spandrels, and molten-salt or ORC-based heat storage. Together, they create a hybrid architectural ecosystem—one that captures sunlight across the entire block, stores it, and converts it into clean energy even after dark. HelioTower proposes a shift in how we think about buildings: not as static consumers, but as active, vertical contributors to a renewable urban grid.

 

Research Project | October 2025