Questions tagged [energy]

For questions about sources of power, generation, storage, how much is needed to perform different tasks, etc.

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4answers
137 views

Human colonies beyond Pluto (on a potential ninth planet)

To be able to colonize another world, there are some requirements; the harvesting of energy, enough recourses, handling of the environment (pressure, temperature and gravity and so on) and ...
3
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3answers
161 views

How could a creature derive energy from radioactive elements?

Have a creature that doesn't really need vitamins or minerals, it only requires energy which goes through a energy-matter conversion to build what it needs. Radioactive materials would be great ...
0
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2answers
84 views

Sewer gas energy?

The Wikipedia page on sewer gas states that Sewer gas can be used as a power source, thus reducing the consumption of fossil fuels. However, no references or ...
20
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1answer
4k views

How do I feed my black hole?

Strange title I know, but you'll understand why quickly. I wanted to use a black hole to create absurd amounts of power for hopefully obvious reasons (kind of useful). The problem with natural large ...
24
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13answers
5k views

Justifying the use of directed energy weapons

In my scifi setting I want a broad range of slugthrowers (bullets, smart ammo, grenades,...), exotic weapons (flame/chemthrowers, high tech blades, nano-bots,...), and directed energy weapons (heat ...
4
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3answers
229 views

What would it look like if a portal opened to a dimension with drastically less energy?

Imagine the other dimension is much much colder. Very little light/heat/etc. Suppose the portal only allows energy transfer, so matter can't pass through. What would the consequences be? Would it ...
3
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3answers
166 views

What energy sources could exist beyond fusion? [closed]

I'm looking for possible sources of energy that could one day replace fusion. I'm not necessarily looking for cool sounding names, as I'm trying to avoid technobabble, but ones that could somewhat ...
3
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2answers
211 views

Batteries for droids [closed]

In Star Wars (again), one of the most recurring characters is R2-D2. Even though he's in most of the movies, I (personally) have never seen him charging. I've seen him do a lot of power consuming ...
10
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2answers
188 views

Realistic Interstellar Energy Transfer

I've been reading some of the excellent answers on this question about galactic empires and it led me to imagine a reasonably realistic multi-system 'empire' might keep most or all of its population ...
6
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6answers
321 views

Can a machine benefit from stored heat energy?

Setting Overview My world suffers from an abundance of a particular type of energy. This energy can be safely absorbed and utilized by living cells, enabling, for example, a dragon's flight and fiery ...
2
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0answers
102 views

Is Santa taking off risk creating a black hole, and will the good kids receive presents survive it? [closed]

Santa has to visit roughly 822 houses a second on Christmas day. At each house he has to stop, go down the chimney to deliver toys, then take off for the next home in a millisecond's time. As the ...
3
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10answers
8k views

Would using carbon dioxide as fuel work to reduce the greenhouse effect?

I'm trying to find a plausible way to reduce global warming in a world past the tipping point. I recently read this article : https://www.sciencedaily.com/releases/2017/11/171127173225.htm. It ...
2
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3answers
269 views

Infinite energy, helicopters and world-wide attention

Story is set in our days, modern Earth with all it's current problems and conflicts. Let's say someone had secretly found a way to produce almost infinite (reasonably infinite, of course) amount of ...
5
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3answers
262 views

Can you prevent a star from dying with infinite energy?

In my story, an advanced alien civilization that can travel to other universes has created an infinite energy source, named "an amvelian core". This core resembles a small sphere in appearance (about ...
13
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2answers
613 views

How Efficient Could Anaerobic Megafauna Be?

Obviously, if available, atmospheric oxygen is a great source of energy. However, I'm surely not the first worldbuilder who wants an alien species which doesn't depend on it (whether due to having ...
4
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5answers
129 views

How can having multiple casters for a spell create excess heat?

Magic works through transmutation circles infused with sigils that both manifest from a person's mind. The individual focuses their Anima, or life force, through these circles in order to create ...
2
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3answers
215 views

Is it plausible to to cover a desert in self-replicating solar panels, using only the materials found in the desert?

Silicon is the main material used in both computers and solar panels. Sand is silicon. Deserts have a lot of sand and sun. This may be an oversimplified way of looking at things, but could we ...
1
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1answer
66 views

Energy Transfer in Telekinesis [closed]

This specific type of telekinesis is constrained in that the telekinetic can only lift what they would physically be able to lift. Somehow, they are transferring energy from their body across space, ...
1
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1answer
198 views

Can human remains be turned into crude oil?

I have a potential sub-plot in a story that takes place in the not too distant future where most of the world's fossil fuels are exhausted or contaminated (war reasons more than environmental) and ...
1
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3answers
151 views

Harvesting carbon free electricity from a field of plants [duplicate]

In the Matrix the movie machines used fields of humans to efficiently harvest electricity from them. In the endeavor to find a renewable carbon free energy source I can only see using plants this way. ...
25
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27answers
8k views

Is it possible to have battery technology that can't be duplicated?

I'm creating a near future world where one faction is using high energy density batteries that enable their vehicles to outperform gasoline based technology. Like cold and silent aircraft and ...
7
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1answer
181 views

How much energy can I produce per kg of hydrogen using this process?

In the far future the posthuman successors of mankind have disassembled the stars and live on ultra slow and ultra efficient solar system sized computers, Matrioshka Brains. The last enemy of ...
6
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7answers
789 views

Compact Mechanical Energy Source

In my late-Victorian world there are independently moving automata that may act as pets or servants to those that can afford them. They require a fair amount of energy to run at full capacity, enough ...
2
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4answers
198 views

Solar panels on rotating wheel space stations

What would be the best configuration of solar panels on a rotating wheel space station? I am thinking about Space Station V design and dimensions. Space Station V comes from 2001: A Space Odyssey. ...
3
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3answers
238 views

Solar cells in the Renaissance

An engineer goes back in time to attempt to rewrite history: since global warming has wiped out all but a few living species at his home timeline, he wants to prevent it without preventing an ...
39
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22answers
9k views

What would be the ideal power source for a cybernetic eye?

After nearly a decade of development and public prototypes, the Mizaru company is ready to unveil the cybereye. A fully cybernetic eye that provides its user/host with high definition vision, enhanced ...
10
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6answers
984 views

Feasability of miniature nuclear reactors for humanoid cyborgs

The idea is to build a cybernetic body for a human. Only the brain and a few glands related to emotions, like adrenal glands, will be kept. The brain and the glands will be in a closed, plug-and-play,...
41
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20answers
9k views

What could be the right powersource for 15 seconds lifespan disposable giant chainsaw?

Imagine when a jet fighter swoops in to drop a 400 pounds giant chainsaw to you just so that you can use it to grind down one problematic enemy into a pulp then discard it a foot away from you. What ...
2
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8answers
2k views

Ideas for 3rd eye abilities [closed]

I am creating a super villain that developed special abilities from a mutated pineal gland. For now i'm referring to it as the Enhanced 3rd eye or the 3rd Eye ability. From the research I've done, ...
7
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2answers
159 views

How small can a perpetual energy source be to run a far-future civilization indefinitely?

You are the leader of a far-future civilization - human or otherwise - that has endured for trillions of years doing whatever far-future civilizations do. You've surrounded stars with Matrioshka ...
8
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4answers
266 views

How much fat would need to be burned in order to shock-restart a human heart?

Imagine a device implanted inside the body which can detect when your heart has stopped and, in such a case, burns fat rapidly to generate enough energy to shock your heart into restarting, in a ...
4
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1answer
131 views

What would be the ideal way to weaponize plasma?

Plasma is a relatively common weapon in science fiction, with weapons that fire magnetically-bound superheated plasma or melee weapons that hold plasma in a containment field to burn through just ...
2
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4answers
348 views

How would a Type I civilization not cook itself?

A type 1 civilization is defined as a civilization that can utilize the maximum amount of energy equal available to its entire planet, roughly 1017 watts for Earth. This is equal to the amount of ...
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3answers
89 views

How to compromise block chain force shield? [closed]

Set in the distant future, a notorious terrorist group infamously known as "51 Crew" is planning an ambush near the orbit of Thebe, Jovian moon. In the next few hours an armoured shuttle holding a ...
7
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6answers
1k views

If curse and magic is two sides of the same coin, why the former is forbidden? [closed]

A gun can bring destruction but at the same time save lives, both curse and magic belongs to different system and operates independently. Curse requires strong feeling such as suffering pain while ...
4
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2answers
148 views

What technology could cause a global black out?

In 2051 a Neo-Luddite movement known as "Amos"/"The Adherents of Amos" detonated some sort of weapon in LEO (low earth orbit) causing a global black out shutting down technology and to a extent modern ...
7
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5answers
329 views

Power Generation Using Undead

Say that we have many undead zombies/vampires/ghouls/whatever. I want to use them to generate electricity, because they never get tired, never need to take breaks, and can exert great force without ...
12
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8answers
3k views

How would an energy-based “projectile” blow up a spaceship?

I have noticed this in many fictions: during a battle between spaceships exchanging fire in empty space, a pulse of laser fire hits the hull and the entire spaceship explodes into many pieces. Is ...
4
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1answer
80 views

Increasing potential energy with ability thought experiment

While recently reading a physics textbook and thinking about magic systems, I tried to perform a thought experiment I had problems with concluding, so I thought of asking for help. Here I explain the ...
1
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0answers
69 views

What's the elemental form used in conjuring a super power/ability? [closed]

Example: kinetic energy used for psychic abilities and chakra for ninjas and so on. What more forms are there? If a knight(mage/magical knight) were to use his 'superpowers', what form of energy ...
3
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4answers
296 views

Regenerating Fuel Cell

I'm working on a powered exoskeleton design for my universe and I had an idea about how to power it. It works in this cycle: Water enters an electrolyzer powered by a massive betavoltaic battery ...
10
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4answers
258 views

How could dragons produce the energy needed to sustain themselves from gold

I'm currently contemplating ways to make dragons have a sustainable energy source in a medieval world, while still acting like the traditional soaring, adventurer grabbing, gold hoarding dragons (not ...
3
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6answers
232 views

Areas with high energy on an Earthlike world

In an earth-like world, what can I provide as examples of areas where high energy is generated naturally? I'm looking for sources of energy other than heat, for e.g, volcanoes and geothermic vents.
0
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1answer
166 views

What will it cost me to travel through Time? (Part 1: Travelling forwards in Time - Time Dilation)

There are many questions on Worldbuilding about what item(s) a time traveller should take back in time in order to alter past events or even simply to survive. There has never as far as I know been ...
0
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4answers
351 views

What would the effects be if all power grids connected to nuclear reactors abruptly suffered catastrophic failure?

To be more specific, I mean what if every wire, every power cable and transformer on the connected grids to the nuclear power plants all ruptured at once. The transformers literally exploding, the ...
4
votes
3answers
288 views

Could a more convenient form of energy transfer/storage than electricity be possible?

I was thinking about the progress that has been made in terms of energy usage for e.g. transport purposes and noticed how the prominent source of energy had changed over time: first muscle power, then ...
2
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0answers
71 views

How would fierce competition affect the adoption of alternative energy sources? [closed]

This is a continuation of the question asked here: How long would it take for nuclear energy to become adopted in a world on the brink of collapse? So, with my current timeline, nuclear energy (and ...
1
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0answers
58 views

Can Artificial Expansion of Space Facilitate Dark Energy [closed]

Granted, not much is known about Dark Energy. Indeed, it may not even exist. What we know is that something is driving the expansion of space (understanding we do not live in a Hubble bubble). This ...
5
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1answer
176 views

How long would it take for nuclear energy to become adopted in a world on the brink of collapse?

For reference, I'm going with the accepted answer given here: How would technology adoption of Lithium Air battery work?. In my world, it makes sense that governments would be very interested in ...
9
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7answers
592 views

Repurposing A Cargo Ship In A Post-Apocalyptic World

How would one go about repurposing a small cargo ship, no more than 50,000 tons, to run on an alternative fuel source/propulsion other than oil? And what alternative source would work best for ...