Stationary, large-scale energy storage optimization: We are studying patterns of electricity consumption and comparing them to changes in solar and wind availability throughout the day (Figure 2). From this analysis we are able to identify optimal properties for future storage materials and devices, and compare current technologies to these performance targets.
- Figure 2. Price, energy resource dynamics, and the impact of storage. A) Cumulative distributions of hourly solar and wind capacity factors, and electricity prices. B) The frequencies and amplitudes of resource and price peaks. C) Energy resource and price time series, and the impact of storage in shifting generation to times of peak price (dotted to solid lines).
- Braff WA, Mueller JM, Trancik JE, Value of storage technologies for wind and solar energy, in review.
Design rules for electric vehicle batteries: By studying patterns of travel and energy consumption in the transportation sector, we are identifying requirements for electric vehicle batteries. In addition, we have uncovered several surprising patterns in commuting across cities of various sizes, shown in Figure 1.