Re: Bloques de hormigón como sistema de almacenamiento de electricidad

Posted by Fleischman on Ago 31, 2018; 12:48pm
URL: http://foro-crashoil.109.s1.nabble.com/Bloques-de-hormigon-como-sistema-de-almacenamiento-de-electricidad-tp46977p47047.html

El párrafo que puse antes de Tom Murphy te da la respuesta, teniendo en cuenta justamente 10 metros:


Let’s start small by considering the 3 W-h of energy stored in a AA battery, as computed above. One kWh of energy is 3.6×106 J of energy, so our AA battery stores 10,800 J of energy. A mass of m kilograms, hoisted h meters high against gravity at g≈10 m/s² corresponds to E = mgh Joules of energy. If we were willing to hoist a mass 3 m high, how much mass would we need to replace the AA battery? Have a guess? The answer is 360 kg, or about 800 lb. A battery the size of your pinky finger beats the proverbial 800 lb gorilla lifted onto your roof!

The lesson is that gravitational storage is incredibly weak. A volume of water the size of our bedroom raised even 10 m above our home in a precarious threat to the neighbors would store 0.625 kWh. That’s enough for 30 minutes of typical household electricity consumption. You’ll forgive me if I ignore efficiency losses. It’s not even worth the effort. It’s over.

Si quieres 3 kWh en lugar de 0.625 kWh, necesitas 4.8 “habitaciones de agua”. Si fueran de cemento, aprox. la mitad (supongamos una densidad más o menos el doble que la del agua).

O, siguiendo el primero de los ejemplos, si para una pila pequeña (3 Wh) necesitas un gorila a 3 metros, para 3 kWh necesitas mil gorilas. 300 gorilas (108 toneladas) si los pones a 10 m en lugar de a 3 m.