The volumetric energy storage capacity of the pumped hydro storage system is very low.
True
False
The self-discharge time of the pumped hydro storage system is very high.
True
False
Very low permeable (leak proof) hard caverns are desired for the compressed air storage system.
True
False
The efficiency of the compressed air energy storage system is low, due the mechanical transmission (Compressor is driven by gas turbine) losses.
True
False
In comparison to pumped hydro storage systems, the flywheel-based storage system has a substantially lower volumetric energy density.
True
False
The electrolyte capacitor has very high cycle life in the order of 1 million cycles.
True
False
Energy absorption and transmission rate of the flywheel energy storage system is very low.
True
False
The maximum applied voltage for tradition capacitor is more than super capacitor.
True
False
The capacitance of a capacitor can be increased with an increase in the dielectric contact area.
True
False
Both AC and DC current source can be applied to the electrolyte capacitor.
True
False
Which mechanical storage system can be implemented for regenerative braking system.
Pumped hydro storage system
Compressed air energy storage system
Flywheel based storage system
Electric AC current generator
The velocity of the water jet at the inlet to the turbine is measured as 88.59 m/s of a pumped hydro storage system. The system has a storage capacity of 10 m3. The pump and turbine efficiencies are 0.6 and 0.7, respectively. Calculate Energy storage capacity of the storage system in terms of KW-hr? (Hint U =(2×g×H)0.5)
0.457
4.57
45.7
10.9
In the electrolyte capacitor, the positively charged anode plate is made of which material?
Aluminium
Tantalum
Niobium
All of these
An energy storage system utilizes a carbon fiber made flywheel with a diameter of 2 meters. What would be revolutions per second of the flywheel to perform at the maximum specific energy density? (hint- refer the table in lecture note for sp. Energy density=400 KJ/Kg)
142.35
14.35
200
400
The Nano porous carbon electrode is used in which of these capacitors?
Traditional capacitor
Electrolyte capacitor
Electric double layer capacitor
All of these
Which would be the best if 8000 J of energy needed to be stored in a single capacitor unit?
Traditional capacitor
Electrolyte capacitor
Super capacitor
Not possible