Researchers from the Pacific Northwest National Laboratory, Richland, Wash., will lead three projects with $3.8 million funding from the Department of Energy's Advanced Research Projects Agency for Energy. The projects are aimed at improving how the U.S. produces and uses energy.
Energy Storage. Solar power technologies provide a source of
clean electricity generation without emission. The heat from the sun needs to
be stored as efficiently as possible to be used upon demand. To enhance
efficiencies and expand applications, there is a need for new materials that
can function at higher temperatures. PNNL scientists Ewa Ronnebro and Kevin
Simmons, along with metallurgical materials scientist Zak Fang at University of
Utah, received $700,000 to investigate a metal hydride material that can store
10 times the amount of heat per mass than conventional molten salt. The team
will first develop a metal hydride with a suitably long lifetime. If
successful, they will then create a small prototype system.
Heat Pump for Electric Vehicles. Internal combustion engines in
today's cars generate a lot of heat, which is great for heating the passenger
cabin in winter. Electric vehicles produce very little waste heat, so providing
electricity for the same amount of heat would reduce their driving range by as
much as 40 percent. PNNL scientists Pete McGrail and Praveen Thallapally, and
University of South Florida chemists Mike Zaworotko and Ma Shengqian, received
$800,000 to develop a material called an electrical metal-organic framework, or
EMOF for short, for vehicle heating and cooling systems. The EMOF would work as
a molecular heat pump, which efficiently circulates heat or cold as needed. By
directly controlling the EMOF's properties with electricity, their design is
expected to use much less energy than traditional heating and cooling systems.
For example, a 5-pound EMOF-based heat pump the size of a 2-liter bottle could
theoretically handle the heating and cooling needs of an electric vehicle with
far less impact on driving distance.
- Manganese-Based Permanent Magnet. PNNL materials scientist Jun Cui and others received $2.3 million to develop a replacement for rare earth magnets - commonly used in wind turbines and electric vehicles - based on an innovative nano-composite using manganese-based alloys. Manganese composites could potentially be twice as strong as current state-of-the-art magnets at higher temperatures, possibly eliminating the need for a cooling system. Importantly, they are based on inexpensive and abundant raw materials. The team will develop stronger magnets by combining high-performance supercomputer modeling with experiments of various metal composite formulations that do not contain rare-earth materials. If developed successfully, these composite magnets will reduce dependence on expensive rare-earth material imports, and reduce the cost and improve efficiency of green technologies.