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Tony Markel
National Renewable Energy Laboratory
47Publications
16H-index
1,640Citations
Publications 47
Newest
2016
Kate Doubleday1
Estimated H-index: 1
(National Renewable Energy Laboratory),
Andrew Meintz4
Estimated H-index: 4
(National Renewable Energy Laboratory),
Tony Markel16
Estimated H-index: 16
(National Renewable Energy Laboratory)
System right-sizing is critical to implementation of in-motion wireless power transfer (WPT) for electric vehicles. This study introduces a modeling tool, WPTSim, which uses one-second speed, location, and road grade data from an on-demand employee shuttle in operation to simulate the incorporation of WPT at fine granularity. Vehicle power and state of charge are simulated over the drive cycle to evaluate potential system designs. The required battery capacity is determined based on the rated po...
1 Citations Source Cite
2016
Lijuan Wang3
Estimated H-index: 3
,
Jeff Gonder2
Estimated H-index: 2
+ 3 AuthorsTony Markel16
Estimated H-index: 16
This study evaluated the costs and benefits associated with the use of stationary-wireless-power-transfer-enabled plug-in hybrid electric buses and determined the cost effectiveness relative to conventional buses and hybrid electric buses. A factorial design was performed over a number of different battery sizes, charging power levels, and f bus stop charging stations. The net present costs were calculated for each vehicle design and provided the basis for design evaluation. In all cases, given ...
2016
Andrew Meintz4
Estimated H-index: 4
(National Renewable Energy Laboratory),
Robert Prohaska4
Estimated H-index: 4
(National Renewable Energy Laboratory)
+ 3 AuthorsKen Kelly1
Estimated H-index: 1
(National Renewable Energy Laboratory)
System right-sizing is critical to implementation of wireless power transfer (WPT) for electric vehicles. This study will analyze potential WPT scenarios for the electrification of shuttle buses at Zion National Park utilizing a modelling tool developed by the National Renewable Energy Laboratory called WPTSim. This tool uses second-by-second speed, location, and road grade data from the conventional shuttles in operation to simulate the incorporation of WPT at fine granularity. Vehicle power an...
Source Cite
2016
Andrew Meintz4
Estimated H-index: 4
,
Tony Markel16
Estimated H-index: 16
+ 1 AuthorsJiucai Zhang4
Estimated H-index: 4
This presentation is an overview of NREL's Electric Vehicle Grid Integration (EVGI) efforts toward integrating Plug-in Electric Vehicles (PEVs) with renewable energy and the grid. Efforts include managed charging, local power quality, emergency backup power, and bi-directional power flow. Discussion of future vehicle-related activities under the Grid Modernization Initiative by the Multi-Lab EV Smart Grid Working Group.
2 Citations
2015
Paul Denholm12
Estimated H-index: 12
,
Joshua Eichman1
Estimated H-index: 1
+ 1 AuthorsOokie Ma7
Estimated H-index: 7
Electric vehicles (EVs) and electrolyzers are potentially significant sources of new electric loads. Both are flexible in that the amount of electricity consumed can be varied in response to a variety of factors including the cost of electricity. Because both EVs and electrolyzers can control the timing of electricity purchases, they can minimize energy costs by timing the purchases of energy to periods of lowest costs.
3 Citations Download PDF Cite
Chris Gearhart1
Estimated H-index: 1
(National Renewable Energy Laboratory),
Jeff Gonder2
Estimated H-index: 2
(National Renewable Energy Laboratory),
Tony Markel16
Estimated H-index: 16
(National Renewable Energy Laboratory)
Drivers across the nation are powering up at electric charging stations, and gas-fueled cars are getting an average of 16% more miles to the gallon than they did just five years ago. However, as the world's population continues to grow, transportation demands and petroleum consumption steadily increase. A 21st-century transportation system not only needs vehicle technology capable of meeting fuel economy goals of 54.5 mi/gal, a truly sustainable transportation future will rely on the widespread ...
2 Citations Source Cite
2013
Ignacio Martin1
Estimated H-index: 1
,
Tony Markel16
Estimated H-index: 16
(National Renewable Energy Laboratory),
J. F Sanz1
Estimated H-index: 1
2 Citations Source Cite
2012
Tony Markel16
Estimated H-index: 16
(National Renewable Energy Laboratory),
Mike Kuss1
Estimated H-index: 1
(National Renewable Energy Laboratory)
+ 5 AuthorsRichard Wilk5
Estimated H-index: 5
(Union College)
The future growth of electrified transportation could be enhanced through interaction with smart grid system architectures. This paper summarizes current literature regarding plug-in electric vehicle — renewables integration and highlights areas of need to implement such integration at a multi-utility scale. Future smart grid implementations hold the key to transferring information and control parameters between distributed and centralized decision agents. The discussion highlights the opportuni...
4 Citations Source Cite
2012
William Kramer6
Estimated H-index: 6
,
Sudipta Chakraborty12
Estimated H-index: 12
+ 3 AuthorsTony Markel16
Estimated H-index: 16
Bidirectional power electronics can add vehicle-to-grid (V2G) capability in a plug-in vehicle, which then allows the vehicle to operate as a distributed resource (DR). The uniqueness of the battery-based V2G power electronics requires a test procedure that will not only maintain IEEE interconnection standards, but can also evaluate the electrical performance of the vehicle working as a DR. The objective of this paper is to discuss a recently published NREL technical report that provides interim ...
2 Citations Download PDF
2011
Michael Kuss1
Estimated H-index: 1
(Office of Scientific and Technical Information),
Tony Markel16
Estimated H-index: 16
,
William Kramer6
Estimated H-index: 6
(National Renewable Energy Laboratory)
Concentrated purchasing patterns of plug-in vehicles may result in localized distribution transformer overload scenarios. Prolonged periods of transformer overloading causes service life decrements, and in worst-case scenarios, results in tripped thermal relays and residential service outages. This analysis will review distribution transformer load models developed in the IEC 60076 standard, and apply the model to a neighborhood with plug-in hybrids. Residential distribution transformers are siz...
22 Citations Download PDF
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