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A new University of Michigan study finds that making the switch to all-electric mail-delivery vehicles would lead to far greater reductions in greenhouse gas emissions than previously estimated by the US Postal Service (USPS). The Postal Service said in February that at least 10% of the new mail trucks would be electric.
A new study by a team from Environmental Health & Engineering (EH&E) has found that greenhouse gas emissions from corn ethanol are 46% lower than those from gasoline—a decrease in emissions from the estimated 39% done by previous modeling. gCO 2 e/MJ) which is 46% lower than the average carbon intensity for neat gasoline.
In addition to its regional and temporal scope, this study is distinct from earlier LCA literature in four key aspects: This study considers the lifetime average carbon intensity of the fuel and electricity mixes, including biofuels and biogas. This is especially important for assessing the GHG emissions of PHEVs.
However, they also noted, high PTW efficiencies and the moderate fuel economies of current compressed natural gas vehicles (CNGVs) make them a viable option as well. If CNG were to be eventually used in hybrids, the advantage of the electric generation/EV option shrinks. Their open access paper is published in the journal Energy.
The results of the Life Cycle Assessment (LCA) of greenhouse gas emissions and primary energy demand of the cars tested by Green NCAP in 2022 show that the current and continuous trend towards larger and heavier cars, significantly increases the negative impact on climate and energy demand.
Renault recently made public the findings of an internal study, published first in October 2011, detailing and comparing the lifecycle assessments (LCAs) of the battery-electric and two internal combustion engined versions (gasoline and diesel) of the Renault Fluence. Gasoline Fluence 16V. Electric Fluence Z.E.
A study based on a spatial and longitudinal travel dataset by a team from Lamar University, Iowa State University and Oak Ridge National Laboratory found that whether plug-in hybrids (PHEVs) have lower energy costs that conventional gasoline vehicles (CGVs) or hybrid-electric vehicles (HEVs) depends on charger coverage.
For example, a typical medium-sized family car will create around 24 tonnes of CO 2 during its life cycle, while an electric vehicle (EV) will produce around 18 tonnes over its life, the report said. A similar electric vehicle will have embedded production emissions of 8.8tCO 2 e, 43% of which arise from the battery. emissions in.
Households with plug-in hybrid vehicles (PHEVs) and smart meters actively managed how, when and where they charged their cars based on electricity rates but rarely took advantage of online feedback, according to a two-year study by a team at the University of Colorado Boulder’s Renewable and Sustainable Energy Institute ( RASEI ).
It adds an assessment of electrically chargeable vehicle configurations, such as plug-in hybrid, range extended, battery and fuel-cell electric vehicles. It also introduces an update of natural gas pathways, taking into account the addition of a European shale gas pathway. ICE-based vehicles and fuels.
V6 TDI bi-turbo with electric compressor. Audi has built two technology studies with the “electric biturbo” technology it is developing ( earlier post ): the Audi A6 TDI concept is equipped with a new 3.0 a single turbo with supplementary electric compressor), while the Audi RS 5 TDI concept with a 3.0 Click to enlarge.
The Electrification Coalition released two case studies outlining how two cities— Houston, Texas and Loveland, Colorado —are saving money by using electric vehicles (EVs) in their vehicle fleets. A similar study examining Loveland, Colo. Earlier post.). In tough economic times, these savings cannot be ignored.
Results of their study, which appear in the ACS journal Environmental Science & Technology , suggest that refinery and product-specific efficiency values are sensitive to crude quality; seasonal and regional factors; and refinery configuration and complexity—which in turn are determined by final fuel specification requirements and regulations.
The Responsible Battery Coalition, in partnership with the University of Michigan Center for Sustainable Systems, launched a comprehensive research project to compare the total cost of ownership of gas and electric vehicles (EVs). Projections of future gasoline and electricity prices. Anticipated driving patterns.
A new study by a team from UC Berkeley and Stanford University suggests that determining the optimal use of biomass to reduce greenhouse gas emissions—i.e, suggested that converting biomass into electricity for EVs abates more GHG emissions than does converting biomass into liquid fuels for use in today’s conventional vehicles.
WTW energy demand and GHG emissions for EV and PHEV drivetrains for various electricity sources; gasoline ICE vehicle is solid square, hybrid the hollow square. The study by a team at the Swiss Federal Institute of Technology Zurich, reported in the Journal of Power Sources , is novel in three respects, the researchers said.
Self Financial, a fintech company, has compared the running costs of electric and non-electric vehicles in each state. Across the US the average annual cost of running an electric vehicle is $2,721.96, while gasoline vehicles cost an average of $3,355.90 per year to run—a difference of $633.94
Internal combustion engines have been significantly improving in the past decade, after the adoption of technologies such as Gasoline Direct Injection, mild electrification, downsizing and turbocharging. The OSU EcoCAR prototype vehicle features an extended-range electric architecture with a downsized 1.8L
A paper on their study appears in the journal Energy Policy. This study implements three main research contents. (1) Correspondingly, the energy structure would become much cleaner, with the share of gasoline declining from 62% in 2012 to 29% in 2050 and the share of electricity increasing to 56% in 2050.
A new study by researchers at MIT’s Center for Transportation and Logistics (CTL), concludes that electric commercial vehicles can cost 9 to 12% less to operate than trucks powered by diesel engines when used to make deliveries on an everyday basis in big cities and when V2G (vehicle-to-grid) revenue is incorporated.
According to a new lifecycle analysis by a team at Carnegie Mellon University, a battery electric vehicle (BEV) powered with natural gas-based electricity achieves around an average 40% lifecycle greenhouse gas (GHG) emissions reduction when compared to a conventional gasoline vehicle. Earlier post.).
Hyundai Motor Group is conducting various R&D activities to minimize greenhouse gas emissions from internal combustion engine (ICE) vehicles during its transition to battery electric vehicles (BEV) and fuel cell electric vehicles (FCEV). The collaboration is expected to create synergies leveraging each participant’s expertise.
Technology warming potential (TWP) for three sets of natural gas fuel-switching scenarios. (A) A) CNG light-duty cars vs. gasoline cars; (B) CNG heavy-duty vehicles vs. diesel vehicles; and (C) combined-cycle natural gas plants vs. supercritical coal plants using low-CH 4 coal. Source: Alvarez et al. Click to enlarge.
Gasoline section shows results for fuel derived from both conventional oil and oil sands. However, the range in values for shale and conventional gas overlap, so there is a statistical uncertainty whether shale gas emissions are actually lower than those of conventional natural gas. Credit: ACS, Burnham et al.
Rice University researchers have determined a more effective way to use natural gas to reduce climate-warming emissions would be in the replacement of existing coal-fired power plants and fuel-oil furnaces rather than burning it in cars and buses. However, residential uses and exports of natural gas were not considered in those comparisons.
These results do not necessarily indicate an increase in oil sands carbon intensity since 2010, IHS said, but rather a revision of the results based on new studies that have applied different modeling techniques and data. The latest report is drawn from the results of 12 recent studies from government, academic and industry sources.
For electric and plug-in hybrid vehicles the carbon intensity of the power grid is also a key factor in terms of the vehicle’s full life cycle emissions. The Ricardo study focuses on providing insights into how life cycle CO 2 e emissions vary by vehicle segment and powertrain technology. Source: Ricardo, LowCVP.
has completed the technical feasibility study for a natural gas to liquids project in Natchez, Mississippi. If the project proceeds it will be capable of producing 4,000 tons of methanol per day or 14,000 barrels of gasoline per day. EmberClear an source gas from Texas and Louisiana, as well as parts of Oklahoma.
The study project—which is 50% complete—is using ORNL’s Market Acceptance of Advanced Automotive Technologies (MA3T) discrete choice model, with the baseline calibrated to the US Energy Information Administration’s Annual Energy Outlook (AEO) 2011 reference case. Study of a fourth critical factor, consumer preference, is to come.
A recent PSI study led by environmental scientist Christian Bauer found that a battery electric car is already the most environmentally friendly option in Switzerland and many other countries, even when the manufacture of the battery is figured in. Our tool offers a very wide range of engine types. —Romain Sacchi. in review).
Chevrolet Volt owners have accumulated more than half a billion all-electric miles since the vehicle’s launch in 2010. Volt owners who charge regularly typically drive more than 970 miles between fill-ups and visit the gas station less than once a month. The Toyota Prius is the most frequently traded-in vehicle for a Volt.
If a ban were introduced on the sale of new gasoline and diesel cars, and they were replaced by electric cars, the result would be a significant reduction in lifecycle carbon dioxide emissions primarily due to reduced tailpipe CO 2 emissions, according to a new lifecycle study by researchers at Chalmers University of Technology, Sweden.
Well-to-wheels results for greenhouse gas emissions in CO 2 e for six pathways. An open access paper on the study in published in the journal Environmental Research Letters. These advances and improvements have helped bioethanol achieve increased energy and GHG emission benefits when compared with those of petroleum gasoline.
Well-to-wheel (WTW) greenhouse gas emissions for in situ SAGD and surface mining pathways generated employing GHOST/TIAX/ GHGenius combination and comparison with SAGD, mining and conventional crude oil literature pathways (all results are on a HHV basis). The diluent used in the dilbit can be natural gas condensate or naphtha.
Numerous LCA tools have been used to evaluate the GHG emissions associated with various vehicle-fuel technologies, including fossil fuels, biofuels, hydrogen fuel cell electric vehicles (FCEVs), hybrid electric vehicles (HEVs), plug-in hybrid electric vehicles (PHEVS), and battery electric vehicles (BEVs).
In a pair of studies using real-world driving conditions, scientists at the US Department of Energy’s Lawrence Berkeley National Laboratory (Berkeley Lab) found that hybrid cars are significantly more fuel-efficient in India and China than they are in the United States due to traffic and driving conditions in those countries. China study.
A study published earlier this year in the journal Nature Climate Change that cast doubt on whether biofuels produced from corn residue could meet federal mandates for cellulosic biofuels to reduce greenhouse gas emissions by 60% compared to gasoline ( earlier post ) has drawn critical response published as correspondence in the same journal.
The Sandia researchers showed that the key to meeting the RFS2 targets is the fuel price differential between E85 fuel and conventional gasoline (low ethanol blends), so that E85 owners refuel with E85 whenever possible. In other words, RFS2 will be satisfied if gasoline becomes significantly more expensive than E85 on a per energy basis.
According to a new study by Bosch, the use of e-fuels—synthetic fuels based on renewable energy—in Europe by 2050 as a scheduled supplement to electrification could save up to 2.8 Even if all cars were to drive electrically one day, aircraft, ships, and even trucks will still run mainly on fuel. Earlier post.)
For the study, they define EVs as including both battery-electric (BEV) and plug-in hybrid electric (PHEV) vehicles. Only in the case of high EV market share and a high renewable electricity standard (RES) do EVs make a material contribution to greenhouse gas (GHG) reductions, they found. Credit: ACS, Choi et al.
Results of a lifecycle analysis by a team at the University of Michigan suggest that multiple types of natural gas-powered vehicles—i.e., Their study appears in the ACS journal Energy & Fuels. … They assumed that the CNGV is fueled by natural gas contained within a 100 kg chrome steel storage tank.
MIT and the IEA both have newly released reports exploring the potential for and impact of a major expansion in global usage of natural gas, given the current re-evaluation of global supplies. The IEA takes a more conventional approach, assessing the impact on the penetration of vehicles burning gas as their fuel. Earlier post.)
Californians own more than 12,000 plug-in electric vehicles (PEVs), roughly 35% of all plug-in vehicles in the United States. The more than 12,000 PEVs provide both consumer and environmental benefits, according to a new study by the California Center for Sustainable Energy (CCSE).
In regions where the share of coal-based electricity is relatively low, EVs can achieve substantial GHG reduction, the team reports in a paper in the ACS journal Environmental Science & Technology. China recently launched several EV demonstration programs (e.g., Earlier post.] —Huo et al.
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