The Need

Air conditioning is a major driver of global electricity demand, peak load stress, and greenhouse gas emissions, particularly in hot and humid climates. Conventional vapor-compression systems rely on electricity-intensive compressors, struggle with efficient humidity control, and are poorly matched to renewable or waste heat sources. As cooling demand continues to grow worldwide, there is a clear unmet need for fundamentally different air conditioning technologies that can reduce electrical demand, shift energy use off-peak, and leverage low-grade renewable heat.

The Technology

OSU engineers have developed a solar-driven, membrane-based adsorption air conditioning system that decouples dehumidification and cooling from traditional compression cycles. It uses advanced porous materials embedded in a membrane to selectively remove moisture from incoming air, followed by indirect evaporative cooling to deliver comfortable indoor air. The moisture-adsorbing materials are regenerated using low-temperature solar thermal heat, enabling a closed, repeated cycle with minimal electricity consumption.

Benefits/Advantages

• Substantially reduced electrical energy use
• Compatible with low-temperature solar thermal heat
• Improved humidity control
• Lower peak electricity demand