General
Out of the topics we covered, which is the most commonly utilized energy storage method?
Pumped hydro storage
What are the three kinds of thermal energy storage discussed?
Sensible heat, latent heat, and thermochemical.
Where is the International Forum for Pumped Storage Hydropower taking place later this year?
Paris, France
What is the only CAES process type implemented in the world today?
Diabatic
Flywheel battery technology emphasizes minimizing ____.
Friction (give them a second chance if they say costs)
Which of the mentioned methods had the high efficiency for energy storage?
Thermal energy storage
Which of the three forms of thermal energy storage is the most widely used?
Sensible heat storage
What two renewable energy sources are favorable to use in conjunction with PSH in Australia?
Wind and Solar
Where are the two existing CAES storage facilities located?
McIntosh, Alabama and Huntorf, Germany
The approximate efficiency of a flywheel battery when converting between mechanical and electrical energy.
85%
Another name for the phenomenon of low net energy demand during the day, followed by a spike between 4-9 P.M.
The Duck Curve
Which thermal energy storage method has the highest storage duration?
Thermochemical
What is the name of the curve that describes electricity demand throughout the day with solar energy accounted for?
The duck curve.
Where is large scale compressed air stored (constant volume)?
Underground salt caverns
The energy capacity of a single Beacon Power flywheel battery.
100 kW
What are some cons of traditional battery storage?
Expensive, short life, environmental concerns, temp. sensitive
In thermochemical energy storage, what process is used to absorb heat energy and what process is used to release the heat energy?
First: Endothermic
Second: Exothermic
Why do PHS systems ultimately have a net negative electricity balance?
It takes more electricity to pump water up the hill than the PHS system can generate when flowing back downhill.
Why is natural gas also needed in CAES?
The Port of Rotterdam was able to reduce their power grid connection from ____ to ____ after installing flywheel batteries
600kW --> 210kW
Energy storage maximizes ___ use
Renewables
In the storage method that stores energy via a phase change, what thermo-physical property governs this process?
Latent heat of fusion.
Why are newer PHS projects proposing closed-loop systems?
Closed-loop pumped-hydro storage offers more chances to minimize environmental effects on water sources and overcomes the problem of finding suitable sites.
How many cubic feet of storage does the CAES plant in Alabama have?
19 million
F1 driver Lewis Hamilton won these two races utilizing KERS technology.
Hungary Grand Prix and Singapore Grand Prix.