In hot and humid climates, air conditioners are less efficient because they require more energy to remove water from the moisture-rich air. More efficient cooling methods are necessary to reduce building energy consumption and environmental impact. Buildings currently account for 72% of the nation's electricity use and 40% of our carbon dioxide (CO2) emissions each year, 5% of which comes directly from air conditioning. The refrigerants typically used in air conditioners are potent greenhouse gases (GHG) that may contribute to global climate change. Because the majority of cooling systems run on electricity, and most U.S. electricity comes from coal-fired power plants which produce CO2, there is a pressing need to support improvements that increase the efficiency of these technologies and reduce the use of GHG refrigerants.
Project Innovation + Advantages:
ADMA Products is developing a foil-like membrane for air conditioners that efficiently removes moisture from humid air. ADMA Products' metal foil-like membrane consists of a paper-thin, porous metal sheet coated with a layer of water-loving molecules. This new membrane allows water vapor to permeate across the membrane at high fluxes, at the same time blocking air penetration and resulting in high selectivity. The high selectivity of the membrane translates to less energy use, while the high permeation fluxes result in a more compact device. The new materials and the flat foil-like nature of the membrane facilitate the mass production of a low-cost compact dehumidification device. ADMA received a separate award of up to $466,176 from the Department of the Navy to help decrease military fuel use.
If successful, ADMA Products' membrane technology would be 50% more energy efficient for dehumidification and/or cooling of hot humid air than traditional air conditioners.
Increased energy efficiency would decrease U.S. energy demand and reduce reliance on fossil fuels—strengthening U.S. energy security.
Improved humidity control in buildings lowers energy use in air conditioning and reduces the production of mold and other irritants caused by high humidity, leading to healthier indoor environments.
Widespread adoption of this technology could reduce energy consumption for air conditioning of buildings—providing consumers with cost savings on energy bills.
ARPA-E Program Director:
Dr. Bryan WillsonProject Contact:
Dr. Vladimir Moxson
Press and General Inquiries Email:
ARPA-E-Comms@hq.doe.govProject Contact Email:
Texas Engineering Experiment Station
Pacific Northwest National Laboratory