Vapor refrigerant at the molecular level (IMAGE) DOE/Pacific Northwest National Laboratory Caption In adsorption cooling systems, molecules of vapor refrigerant (the guest) are adsorbed in the nanopores of a solid material (the host). Motkuri and his collaborators have studied how changing the geometry of the nanopores (pore engineering) and the speed of host-guest chemical interactions affect the cooling capacity and energy efficiency of adsorption cooling systems. Credit (Image by Rose Perry | Pacific Northwest National Laboratory) Usage Restrictions No restrictions. License Public Domain Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.