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Are you suggesting to use flywheels as an energy source in EVs??? There is a heap of issues with this idea, the main ones: - They are VERY heavy. Typical energ
by fuoqi 4y ago
Are you suggesting to use flywheels as an energy source in EVs??? There is a heap of issues with this idea, the main ones:
- They are VERY heavy. Typical energy density for flywheels is 10-40 kJ/kg (if you account for the whole flywheel), while Li-ion batteries and gasoline store 300-1000 kJ/kg and 46700 kJ/kg respectively (the latter does not account for ICE efficiency).
- They are relatively big, since you can store more energy with a bigger diameter (limited by material's strength-to-weight ratio).
- Flywheel is a big gyroscope. You do not want to rotate it around while it spins.
- swayvil 4y agoYes, I understand the issues. They've used them in busses. Higher speed means more energy storage and ness necessary weight. Gyroscopic action can be handled with gimbals. Etc. So back to my question.