Engineering topics

Doubleday, Kate

Publications and source records attributed to Doubleday, Kate.

20 records · Page 2

DOE OSTI2016

Opportunistic Wireless Charging System Design for an On-Demand Shuttle Service

System right-sizing is critical to the implementation of in-motion wireless power transfer (WPT) for electric vehicles. This study evaluates potential system designs for an on-demand employee shuttle by determining the required battery size based on the rated power at a variable number of charging locations. Vehicle power and state of charge are simulated over the drive cycle, based on position and velocity data at every second from the existing shuttle. Adding just one WPT location can halve the battery size. Many configurations are capable of self-sustaining with WPT, while others benefit from supplemental stationary charging.

33 ADVANCED PROPULSION SYSTEMS↗

DOE OSTI2016

Recovery of inter-row shading losses using differential power-processing submodule DC–DC converters

Large commercial photovoltaic (PV) systems can experience regular and predictable energy loss due to both inter-row shading and reduced diffuse irradiance in tightly spaced arrays. This article investigates the advantages of replacing bypass diodes with submodule-integrated DC-DC converters (subMICs) to mitigate these losses. Yearly simulations of commercial-scale PV systems were conducted considering a range of row-to-row pitches. In the limit case of array spacing (unity ground coverage), subMICs can confer a 7% increase in annual energy output and peak energy density (kW h/m 2 ). Simulation results are based on efficiency assumptions experimentally confirmed by prototype submodule differential power-processing converters.

14 SOLAR ENERGY↗