Questions tagged [energy-storage]
Long-term storage of energy is a difficult technical problem that limits the usability of renewable sources of energy to replace traditional fossil fuel sources
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Effect of adiabatic compression of air with cooling water
In the context of a hypothetical method for CAES, I was comparing the following two scenarios:
Assume that in the first case air is compressed in an adiabatic process from ambient pressure to ...
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Can hydrogen be stored in the crystalline structure of ice?
I recently read that when ice freezes to form hexagonal crystals, the space within the hexagon is in fact a vacuum. Could this space potentially be used to store burnable hydrogen gas? If so, would ...
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Benefit of Hydrogen Electrolysis
I was considering building a simple solar hydrogen generator for fun and it led me to the question
Does the hydrogen produced have more potential energy than the electricity used to get it?
Obvious ...
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Electrical Power and stored power
The simple circuit below, consists of a battery with constant electromotive force (efm), $\epsilon_0$, a capacitor which capacity varies with time $C(t)$ and ,to make it simple, ideal wires (zero ...
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Would "Energy Vault" gravity battery work in water?
To be more specific, will one block lowered into water release the same amount of energy as in air?
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Is Gravity Storage a pipe dream? [closed]
Background
Energy Vault has a new Gravity Storage system its spruiking (Link here). They are getting a lot of attention and funding. However I am skeptical on the technology and I don't understand why ...
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Would this theoretical battery be practical: 2 charged objects close to one another? [closed]
Consider a system which stores energy by forcing two charged objects (of the same charge) close to one another. When the energy needs to be used, a latch could open and the objects would accelerate ...
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What happens to generated electricity if nobody uses it? [duplicate]
Let's take for example hydroelectricity produced at a dam and not consumed by any household or industry... Will the electricity need to be stored? What will happen if it is not stored? Does it flow ...
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Unusual temperature shape in gravel heat storage
I’m currently doing undergrad research on using a gravel (basalt 2-5mm grain size) bed as an heat storage. In order to heat up the gravel inside, hot (~100°C) and dry (RF<4%) air with a pressure of ...
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Self-sustained water flow and E-generation between tanks due to air pressure?
I am wondering about the concept of water flowing from one place to another due to air pressure and have a question about the limitations in the real world. Don't understand me wrong, I am not trying ...
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Why does pumped hydro require reservoirs for efficient energy storage?
The problems with using pumped hydro as a long term battery are:
Hard to find locations physically suited for an extreme height gradient for two massive reservoirs (main issue).
Water evaporates, so ...
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Superconducting energy storage and voltage [closed]
I've been reading up on superconducting magnetic energy storage, and while I know how the energy is stored ($E=\frac12LI^2$) I have no idea how the discharging works. Specifically, as per this paper 1 ...
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What is the most common method used to cool hydrogen below its boiling point?
I would like to know what methods companies/organizations/scientists use to cool gaseous hydrogen below its boiling point of ~250 degrees Celsius. I am a new student to thermochemistry and am not ...
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What do maufacturers do to ensure that a valve is capable of containing hydrogen gas? [closed]
I am a researcher working to develop a hydrogen fuel system for use in a specialized internal combustion engine. The biggest challenge from an engineering standpoint with a project such as this is the ...
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Why aren't gravity batteries everywhere? [closed]
The problem of energy storage, especially with regard to renewables, remains unsolved. Or at least there do not seem to be any popular solutions.
Why not gravity batteries?
I love the idea, and ...
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