Cool MOFs
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Category: ResearchType: News
Source: PNNL
Date: Friday, July 28th, 2017
Nanomaterials show promise for chillers
News Brief
July 28, 2017 
RICHLAND, Wash. - About 15 percent of all energy usage in the U.S. goes toward cooling. New research from the D.O.E.'s Pacific Northwest National Lab may ultimately help lower energy consumption for air conditioning by engineering tiny porous materials to hold onto a large amount of refrigerant gases.
The high attachment of this gas - an environmentally friendly fluorocarbon called R134 and water - to nanomaterials called metal organic frameworks hold promise for their use in adsorbent cooling systems that a can be powered by waste heat.
In a paper just published in the Journal of the American Chemical Society, PNNL found that this refrigerant adhered to the high open metal centers of the MOF. Results also indicate that researchers could likely engineer the pores of the material to enhance the amount of the refrigerant loading even further. And the small nanostructure of the MOF and its higher sorption rate means the cooling systems can be made much smaller and, therefore, more efficient and economically viable.
One exciting development turns out to be the potential to quickly identify refrigerant leaks both in adsorbent chillers and traditional air conditioning systems.The MOF material in the study is highly sensitive to infrared light, which shows even extreme low concentrations of water and refrigerant as a visual peak on a spectrum. This may provide an easy way to detect hidden coolant leaks, which cause a reduction in cooling and a higher use of energy.
Learn more in this highlight.
Tags: Energy, Fundamental Science, Materials
Interdisciplinary teams at Pacific Northwest National Lab address many of America's most pressing issues in energy, the environment and national security through advances in basic and applied science. Founded in 1965, PNNL employs 4,400 staff and has an yearly budget of nearly $1 billion. It is managed by Battelle for the D.O.E.'s Office of Science. As the single biggest supporter of basic research in the physical sciences in the United States, the Office of Science is working to address some of the most pressing challenges of our time. For more information on PNNL, visit the PNNL News Center, or follow PNNL on Facebook, Google+, Instagram, LinkedIn and Twitter.
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