...Вона блює і співає (
bytebuster) wrote2017-01-24 07:06 pm
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Why don't we use weights to store energy?
Q: Why don't we use weights to store energy?
Now, how much energy can it store? This is given by potential energy formula E=mgh, thus E=100kg⋅9.8m/s2⋅10m=9.8kJ≈2.7Wh.
For comparison, a single AA-sized battery stores about 2Wh of energy.
dotancohen: Does that imply that a single AA-sized battery with a suitable motor and gearing could lift four 25 KG suitcases to my third-floor apartment?
Luaan: Ignoring a few complications and efficiency losses, yup, almost.
One of the main reasons why we haven't switched to clean energy is the lack of efficient storage methods - But, why aren't we using dead weights to store energy and draw it back later when needed? As an example of what I mean:
Now, how much energy can it store? This is given by potential energy formula E=mgh, thus E=100kg⋅9.8m/s2⋅10m=9.8kJ≈2.7Wh.
For comparison, a single AA-sized battery stores about 2Wh of energy.
dotancohen: Does that imply that a single AA-sized battery with a suitable motor and gearing could lift four 25 KG suitcases to my third-floor apartment?
Luaan: Ignoring a few complications and efficiency losses, yup, almost.
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Поки читав зрозумів, що хочу поділитися двома статтями. Першу вам вже запропонували, тож на друге:
Okinawa Yanbaru Seawater Pumped Storage Power Station
Це не та стаття, що я читав, проте їх чимало, можете пошукати самі. Навіть відео було про будівництво, якщо я не плутаю, проте також не знайшов.
Дарма ви так про цю "безсердечну суку", гравітація вона така :)
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Кльово, дякую!
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Хоча не рахував, цікаво було б почитати десь.
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http://www.dailymail.co.uk/news/article-2430771/Worlds-self-powering-gym-uses-energy-WORKOUT-lights-dont-break.html
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