Energy Efficient and Adaptive Space Cooling and Heating Rooftop Panel

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Researchers at Purdue University have developed a radiative cooling and heating rooftop panel that can be easily integrated into an HVAC system. HVAC systems receive, store, and disperse both cooling and heating energy. While effective, current systems still struggle with on-demand cooling energy storage, roof access beyond the solar panels, and overall complexity. There remains an unmet need for an energy-efficient cooling and heating rooftop panel. Purdue researchers developed one that uses the environment for its fuel and can maintain sub-ambient levels. The adaptive radiant material layer responds to input from the sun, sky and occupant feedback to generate hot water or chilled water as needed. The technology gathers heating energy from the solar panels during the day and then switches to storing cooling energy from the sky at night. This plus the hydronic system to store and dissipate the heat/cooling air as needed forms the solution at hand.

Technology Validation: Researchers tested the adaptive panel in different temperatures/climates and used a 3-way mixing valve to alternate between the two chilled and heated water loops to maintain thermal comfort.


Dec 23, 2021
Utility Patent
United States

Dec 24, 2020
United States
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