Loading...
Using Natural Gas for Vehicles: Comparing Three Technologies
1/4/2016
In the United States, natural gas as a fuel is typically used for medium- or heavy-duty vehicles in centrally-fueled fleets. It has been proposed for greater use as a fuel for light-duty vehicles (LDVs). This can mean burning natural gas in an internal combustion engine like those used in most gasoline- and diesel-powered vehicles on the road today. However, natural gas can also serve as the energy source for plug-in electric or hydrogen fuel cell electric vehicles. This fact sheet compares some efficiency and environmental metrics for three possible options for using natural gas in LDVs.
Clean Cities 2014 Annual Metrics Report
12/22/2015
Each year, the U.S. Department of Energy asks its Clean Cities program coordinators to submit annual reports of their activities and accomplishments for the previous calendar year. Data and information are submitted via an online database that is maintained as part of the Alternative Fuels Data Center (AFDC) at the National Renewable Energy Laboratory (NREL). Coordinators submit a range of data that characterize the membership, funding, projects, and activities of their coalitions. They also submit data about sales of alternative fuels, deployment of alternative fuel vehicles (AFVs) and hybrid electric vehicles (HEVs), idle-reduction (IR) initiatives, fuel economy activities, and programs to reduce vehicle miles traveled (VMT). NREL analyzes the data and translates them into petroleum-use reduction impacts, which are summarized in this 2014 Annual Metrics Report.
Authors: Johnson, C.; Singer, M.
Workplace Charging Challenge, Mid-Program Review: Employees Plug In
12/1/2015
This Program Review takes an unprecedented look at the state of workplace charging in the United States -- a report made possible by U.S. Department of Energy leadership and valuable support from our partners as they share their progress in developing robust workplace charging programs. Through the Workplace Charging Challenge, more than 250 participants are accelerating the development the nation's worksite PEV charging infrastructure and are supporting cleaner, more convenient transportation options within their communities. Challenge partners are currently providing access to PEV charging stations at more than 440 worksites across the country and are influencing countless other organizations to do the same.
Costs Associated with Non-Residential Electric Vehicle Supply Equipment
11/30/2015
As more drivers purchase plug-in electric vehicles (PEVs), there is a growing need for a network of electric vehicle supply equipment (EVSE) to provide power to those vehicles. PEV drivers will primarily charge their vehicles using residential EVSE, but there is also a need for non-residential EVSE in workplace, public, and fleet settings. This report provides information about the costs associated with purchasing, installing, and owning non-residential EVSE.
Interstate Electrification Improvement Project Final Report
9/4/2015
This report provides an overview of the Shorepower Truck Electrification Project, which started in May 2011 and ended in March 2015. The project provided financial incentives on idle reduction equipment to 5,000 trucks, to install equipment compatible with shore power. It generated the largest dataset to date on shore power truck stop electrification utilization and use patterns. This report summarizes project data, which provided insight into driver behavior and acceptance, evidence of cost savings, experience with system operations and management; and data for guiding future development of shore power.
Authors: Puckette, M.; Kim, J.
Quadrennial Technology Review 2015
9/1/2015
The 2015 Quadrennial Technology Review (QTR) examines the status of the science and technology that are the foundation of our energy system, together with the research, development, demonstration, and deployment (RDD&D) opportunities to advance them. It focuses primarily on technologies with commercialization potential in the midterm and beyond. It frames various trade-offs that all energy technologies must balance across such dimensions as cost, security and reliability of supply, diversity, environmental impacts, land use, and materials use. Additionally, it provides data and analysis on RDD&D pathways to assist decision makers as they set priorities, within budget constraints, to develop more secure, affordable, and sustainable energy services.
Plugged In: How Americans Charge Their Electric Vehicles
9/1/2015
The U.S. Department of Energy's EV Project and the ChargePoint America project, combined, formed the largest PEV infrastructure demonstration in the world. Between Jan. 1, 2011, and Dec. 31, 2013, this combined project installed nearly 17,000 alternating current (AC) Level 2 charging stations for residential and commercial use and over 100 dual-port direct current (DC) fast chargers in 22 regions across the United States. This report is a summary of the findings from these projects.
Long-Haul Truck Idling Burns Up Profits
8/12/2015
Long-haul truck drivers perform a vitally important service. In the course of their work, they must take rest periods as required by federal law. Most drivers remain in their trucks, which they keep running to provide power for heating, cooling, and other necessities. Such idling, however, comes at a cost; it is an expensive and polluting way to keep drivers safe and comfortable. Increasingly affordable alternatives to idling not only save money and reduce pollution, but also help drivers get a better night's rest.
Challenges and Opportunities for Transactive Control of Electric Vehicle Supply Equipment: A Reference Guide
7/29/2015
This report seeks to characterize the opportunities and challenges that arise in developing a transactive control strategy for grid and electric vehicle supply equipment (EVSE) integration in various use-case scenarios in a way that provides end-user, energy market, grid, and societal benefits. This report serves as a reference guide for stakeholders in the grid-EVSE integration area, illustrates potential implementations, and identifies a high-value research project for overcoming the barriers and unlocking the benefits of transactive controls of EVSE.
Authors: Jin, X.; Meintz, A.
Strategic Planning to Implement Publicly Available EV Charging Stations: A Guide for Businesses and Policymakers
7/1/2015
This guide, prepared for the National Association of State Energy Officials, answers questions that private investors and state and local agencies, such as state energy offices, may have in deciding whether and to what extent they should invest in publicly available charging infrastructure. It demonstrates that with continued public support in the near term, new business models could gradually make publicly available charging projects profitable for private businesses without additional government interventions.
Authors: Nigro, N.; Welch, D.; Peace, J.
Characterize the Demand and Energy Characteristics of Direct Current Fast Chargers
6/1/2015
The EV Project partnered with city, regional and state governments, utilities, and other organizations in 18 cities to deploy about 12,500 public and residential charging stations. It also demonstrated 8,650 plug-in electric vehicles. The focus of this paper is to identify the impact of direct current (DC) fast chargers charging on the total system load. It also identifies the characteristics of the aggregated group of DC fast chargers and a single typical DC fast charger and its charge profile or load duration curve.
What were the Cost Drivers for the DC Fast Charging Installations?
5/12/2015
The EV Project partnered with city, regional and state governments, utilities, and other organizations in 18 cities to deploy about 12,500 public and residential charging stations. It also demonstrated 8,650 plug-in electric vehicles. This evaluation reviews not only the costs and site conditions associated with the 111 DC fast chargers deployed during the EV Project, but also includes estimates obtained for another 50+ DC fast charger sites that were planned, but were not installed.
What were the "Best Practices" Identified for Residential Charger Installations?
4/1/2015
This lessons learned white paper is based on data from the EV Project which enrolled 8,000 residential participants to install and use residential electric vehicle supply equipment. Along with background information and key conclusions, this paper describes observations regarding permitting practices and best installation conditions.
Sample Workplace Charging Policy
3/2/2015
A sample workplace charging policy developed by the U.S. Department of Energy's Workplace Charging Challenge.
Authors: Workplace Charging Challenge
Effects of Regional Temperature on Electric Vehicle Efficiency, Range, and Emissions in the United States
2/11/2015
We characterize the effect of regional temperature differences on battery electric vehicle (BEV) efficiency, range, and use-phase power plant CO2 emissions in the U.S. The efficiency of a BEV varies with ambient temperature due to battery efficiency and cabin climate control. We find that annual energy consumption of BEVs can increase by an average of 15% in the Upper Midwest or in the Southwest compared to the Pacific Coast due to temperature differences. Greenhouse gas (GHG) emissions from BEVs vary primarily with marginal regional grid mix, which has three times the GHG intensity in the Upper Midwest as on the Pacific Coast. However, even within a grid region, BEV emissions vary by up to 22% due to spatial and temporal ambient temperature variation and its implications for vehicle efficiency and charging duration and timing. Cold climate regions also encounter days with substantial reduction in EV range: the average range of a Nissan Leaf on the coldest day of the year drops from 70 miles on the Pacific Coast to less than 45 miles in the Upper Midwest. These regional differences are large enough to affect adoption patterns and energy and environmental implications of BEVs relative to alternatives.
Authors: Yuksel, T.; Michalek, J. J.
Notes: This Environmental Science & Technology article is copyrighted by the American Chemical Society and only available by accessing it through ACS Publications.
