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Articles 1 - 6 of 6
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How Responsive Is Saudi New Vehicle Fleet Fuel Economy To Fuel-And Vehicle-Price Policy Levers?, Tamara L. Sheldon, Rubal Dua
How Responsive Is Saudi New Vehicle Fleet Fuel Economy To Fuel-And Vehicle-Price Policy Levers?, Tamara L. Sheldon, Rubal Dua
Faculty Publications
This paper investigates the drivers of recent improvements in Saudi Arabia's fleet fuel economy for new vehicles including passenger cars and light-duty trucks. Vehicle choice models are estimated using both aggregate new vehicle sales data and disaggregate new vehicle buyer survey data. The estimated models are used to simulate counterfactual policy scenarios. Simulation results suggest that the Saudi gasoline price elasticity of demand for new vehicle fuel economy decreased slightly over recent years, but it is still more elastic than that of the United States. Moreover, the increase in domestic gasoline prices between 2014 and 2016 accounted for 42% of …
Analysis Of Emission Effects Related To Drivers’ Compliance Rates For Cooperative Vehicle-Infrastructure System At Signalized Intersections, Ruohua Liao, Xumei Chen, Lei Yu, Xiaofei Sun
Analysis Of Emission Effects Related To Drivers’ Compliance Rates For Cooperative Vehicle-Infrastructure System At Signalized Intersections, Ruohua Liao, Xumei Chen, Lei Yu, Xiaofei Sun
Faculty Publications
Unknown remaining time of signal phase at a signalized intersection generally results in extra accelerations and decelerations that increase variations of operating conditions and thus emissions. A cooperative vehicle-infrastructure system can reduce unnecessary speed changes by establishing communications between vehicles and the signal infrastructure. However, the environmental benefits largely depend on drivers’ compliance behaviors. To quantify the effects of drivers’ compliance rates on emissions, this study applied VISSIM 5.20 (Planung Transport Verkehr AG, Karlsruhe, Germany) to develop a simulation model for a signalized intersection, in which light duty vehicles were equipped with a cooperative vehicle-infrastructure system. A vehicle-specific power (VSP)-based …
Nitrogen Rate And Landscape Impacts On Life Cycle Energy Use And Emissions From Switchgrass-Derived Ethanol, Eric G. Mbonimpa, Sandeep Kumar, Vance N. Owens, Rajesh Chintala, Heidi L. Sieverding, James J. Stone
Nitrogen Rate And Landscape Impacts On Life Cycle Energy Use And Emissions From Switchgrass-Derived Ethanol, Eric G. Mbonimpa, Sandeep Kumar, Vance N. Owens, Rajesh Chintala, Heidi L. Sieverding, James J. Stone
Faculty Publications
Switchgrass-derived ethanol has been proposed as an alternative to fossil fuels to improve sustainability of the US energy sector. In this study, life cycle analysis (LCA) was used to estimate the environmental benefits of this fuel. To better define the LCA environmental impacts associated with fertilization rates and farm-landscape topography, results from a controlled experiment were analyzed. Data from switchgrass plots planted in 2008, consistently managed with three nitrogen rates (0, 56, and 112 kg N ha−1), two landscape positions (shoulder and footslope), and harvested annually (starting in 2009, the year after planting) through 2014 were used as input into …
Characterization Of Particle Emissions And Fate Of Nanomaterials During Incineration, Eric P. Vejerano, Elena C. Leon, Amara L. Holder, Linsey C. Marr
Characterization Of Particle Emissions And Fate Of Nanomaterials During Incineration, Eric P. Vejerano, Elena C. Leon, Amara L. Holder, Linsey C. Marr
Faculty Publications
As the use of nanotechnology in consumer products continues to grow, it is inevitable that some nanomaterials will end up in the waste stream and will be incinerated. Through laboratory-scale incineration of paper and plastic wastes containing nanomaterials, we assessed their effect on emissions of particulate matter (PM) and the effect of incineration on the nanomaterials themselves. The presence of nanomaterials did not significantly influence the particle number emission factor. The PM size distribution was not affected except at very high mass loadings (10 wt%) of the nanomaterial, in which case the PM shifted toward smaller sizes; such loadings are …
Measurement Of Particle Size Distribution In A Swine Building, Sheryll B. Jerez, Yuanhui Zhang, X Wang
Measurement Of Particle Size Distribution In A Swine Building, Sheryll B. Jerez, Yuanhui Zhang, X Wang
Faculty Publications
The majority of the research in animal buildings has been on measured concentrations of contaminants that the workers and animals are exposed to; emission measurements have only gained attention in recent years due to potential federal regulations on air quality emissions from animal feeding operations (AFOs). The contribution of AFOs to ambient PM10 and PM2.5 entails reliable measurement of particle size distribution. The objective of this study was to measure and compare the size distribution of particulate matter (PM) at multiple locations inside and at the exhausts of a wean‐to‐finish commercial swine building. The particle size distribution was measured by …
Spatial And Temporal Distributions Of Dust And Ammonia Concentrations In A Swine Building, Sheryll B. Jerez, Yuanhui Zhang, X Wang
Spatial And Temporal Distributions Of Dust And Ammonia Concentrations In A Swine Building, Sheryll B. Jerez, Yuanhui Zhang, X Wang
Faculty Publications
Pollutants, especially dust, are rarely uniformly distributed within ventilated air spaces due to non‐uniform flow fields, particle inertia, gravitational settling, and diffusion. Thus, selecting suitable sampling locations for representative sampling is a challenge. The objective of this study was to determine the spatial and temporal distributions of dust and ammonia concentrations(NH3) in a swine building. Results of this study are useful in the design of sampling strategies that require limited sampling locations and in studying pollutant transport. This study was conducted in a commercial swine building in Illinois. The total suspended particulate (TSP) matter and ammonia concentrations were measured at …