An energy storage system is being designed using a number of concrete blocks and electrically driven carriages, each carriage has a mass 10 000 kg, which can be raised to a certain height using electric motor driven trains using excess power from a combined solar-wind farm. Power is recovered using the same motors and releasing the concrete blocks and carriages. If the excess energy on one day is 2 GJ, the maximum height is 200 m and the efficiency is 100%, how many carriages are needed to store this energy (assume g = 10 m/s²).
An energy storage system is being designed using a number of concrete blocks and electrically driven carriages, each carriage has a mass 10 000 kg, which can be raised to a certain height using electric motor driven trains using excess power from a combined solar-wind farm. Power is recovered using the same motors and releasing the concrete blocks and carriages. If the excess energy on one day is 2 GJ, the maximum height is 200 m and the efficiency is 100%, how many carriages are needed to store this energy (assume g = 10 m/s²).
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Transcribed Image Text:An energy storage system is being designed using a number of concrete blocks and
electrically driven carriages, each carriage has a mass 10 000 kg, which can be raised
to a certain height using electric motor driven trains using excess power from a
combined solar-wind farm. Power is recovered using the same motors and releasing the
concrete blocks and carriages. If the excess energy on one day is 2 GJ, the maximum
height is 200 m and the efficiency is 100%, how many carriages are needed to store this
energy (assume g = 10 m/s²).
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