Led by Dr. Michael Wang, a group of Argonne transportation researchers regularly update key parameters and assumptions in the GREET model on the basis of new research and development in fuel pathways and vehicle technologies. Today, GREET can simulate more than 100 fuel production pathways and more than 80 vehicle/fuel systems. The model has more than 4,000 registered users worldwide.
The newest update released today will allow scientists to model combustion of ethanol produced from Brazilian sugarcane and used by U.S. automobiles; production and use of bio-butanol as a potential transportation fuel; and production and use of biodiesel and renewable diesel via hydrogenation, coal/biomass co-feeding for Fischer-Tropsch diesel production and various corn ethanol plant types with different process fuels.
In addition, simulations of many existing fuel pathways in GREET are updated. For example, petroleum refining energy efficiencies in GREET are updated with recent survey data from the Energy Information Administration. Enhancements to current pathways include three methods for dealing with co-products for soybean-based biodiesel, compression energy efficiencies for natural and hydrogen gases are calculated with the first law of thermodynamics and a tube trailer delivery option for hydrogen gas to refueling stations.
In addition to the fuel-cycle GREET module, the vehicle-cycle GREET module incorporates an additional platform, allowing researchers to model sport utility vehicles in addition to cars and light trucks. That version better evaluates the energy consumption required to produce the aluminum used in the chassis of automobiles.
Several state and federal agencies have used GREET to aid in their considerations of potential fuel greenhouse gas regulations. For example, the U.S. Environmental Protection Agency uses a specific set of assumptions with the GREET model in its analysis of the reductions in greenhouse gas emissions resulting from the potential expanded use of renewable and alternative fuels.
California Air Resources Board has been using a GREET version in its effort to develop low-carbon fuel standards.
Brock Cooper | EurekAlert!
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University of Maryland researchers contribute to historic detection of gravitational waves and light created by event
On August 17, 2017, at 12:41:04 UTC, scientists made the first direct observation of a merger between two neutron stars--the dense, collapsed cores that remain...
Seven new papers describe the first-ever detection of light from a gravitational wave source. The event, caused by two neutron stars colliding and merging together, was dubbed GW170817 because it sent ripples through space-time that reached Earth on 2017 August 17. Around the world, hundreds of excited astronomers mobilized quickly and were able to observe the event using numerous telescopes, providing a wealth of new data.
Previous detections of gravitational waves have all involved the merger of two black holes, a feat that won the 2017 Nobel Prize in Physics earlier this month....
Material defects in end products can quickly result in failures in many areas of industry, and have a massive impact on the safe use of their products. This is why, in the field of quality assurance, intelligent, nondestructive sensor systems play a key role. They allow testing components and parts in a rapid and cost-efficient manner without destroying the actual product or changing its surface. Experts from the Fraunhofer IZFP in Saarbrücken will be presenting two exhibits at the Blechexpo in Stuttgart from 7–10 November 2017 that allow fast, reliable, and automated characterization of materials and detection of defects (Hall 5, Booth 5306).
When quality testing uses time-consuming destructive test methods, it can result in enormous costs due to damaging or destroying the products. And given that...
Using a new cooling technique MPQ scientists succeed at observing collisions in a dense beam of cold and slow dipolar molecules.
How do chemical reactions proceed at extremely low temperatures? The answer requires the investigation of molecular samples that are cold, dense, and slow at...
Scientists from the Max Planck Institute of Quantum Optics, using high precision laser spectroscopy of atomic hydrogen, confirm the surprisingly small value of the proton radius determined from muonic hydrogen.
It was one of the breakthroughs of the year 2010: Laser spectroscopy of muonic hydrogen resulted in a value for the proton charge radius that was significantly...
17.10.2017 | Event News
10.10.2017 | Event News
10.10.2017 | Event News
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20.10.2017 | Interdisciplinary Research