Elie: Elie moved page Flywheels to Archive:000/Flywheels without leaving a redirect: Huge_refactor

2024-10-26T20:29:42Z

Elie moved page Flywheels to Archive:000/Flywheels without leaving a redirect: Huge_refactor

← Older revision	Revision as of 16:29, 26 October 2024
(No difference)

Elie at 19:23, 2 September 2023

2023-09-02T19:23:15Z

← Older revision		Revision as of 15:23, 2 September 2023
Line 104:		Line 104:
	==Suitable for vehicles?==		==Suitable for vehicles?==
	Flywheel-based vehicles have existed for over a century, but they don't store enough energy to last more than a kilometer. Perhaps vacuum-sealed electrical type of flywheel could store more energy {{x\|this page needs to clarify this more in previous paragraphs}}, but would the bumps of the road cause energy losses too quickly? This page needs more research.		Flywheel-based vehicles have existed for over a century, but they don't store enough energy to last more than a kilometer. Perhaps vacuum-sealed electrical type of flywheel could store more energy {{x\|this page needs to clarify this more in previous paragraphs}}, but would the bumps of the road cause energy losses too quickly? This page needs more research.

			[[Category:Energy storage]]
			<!-- TODO:
			* refactor this page to the newer considerations format
			* use some sorta standardized need-for-energy-storage value in calculations
			-->

Elie: Created page with "Flywheels are a proposed solution to part of the energy storage problem. Flywheels store energy mechanically by spinning a heavy rotor at high speeds. This has been implemented before, both inside vehicles {{x|but not necessarily storing enough energy to power the vehicle for more than a few kilometers at best}} ''and'' in stationary electrical systems {{x|with a much higher specific energy}}. ===Viability=== {|class="wikitable" |#Need for iron |Not too bad |-..."

2023-01-27T02:52:55Z

Created page with "Flywheels are a proposed solution to part of the energy storage problem. Flywheels store energy mechanically by spinning a heavy rotor at high speeds. This has been implemented before, both inside vehicles {{x|but not necessarily storing enough energy to power the vehicle for more than a few kilometers at best}} ''and'' in stationary electrical systems {{x|with a much higher specific energy}}. ===Viability=== {|class="wikitable" |#Need for iron |Not too bad |-..."

New page

Flywheels are a proposed solution to part of the [[energy storage]] problem.

Flywheels store energy mechanically by spinning a heavy rotor at high speeds. This has been implemented before, both inside vehicles {{x|but not necessarily storing enough energy to power the vehicle for more than a few kilometers at best}} ''and'' in stationary electrical systems {{x|with a much higher specific energy}}.

===Viability===
{|class="wikitable"
|[[#Need for iron]]
|Not too bad
|-
|[[#Need for rare-earth magnets]]
|Might be an issue{{rn}}
|-
|[[#Energy in manufacturing]]
|Unknown{{rn}}
|-
|[[#Charge/discharge losses]]
|Tradeoff with the other issues{{rn}}
|-
|[[#Suitable for vehicles?]]
|Probably not suitable enough{{rn}}
|}
==Need for iron==

If flywheels are made mostly of [[steel]] (which is mostly iron), we ''would'' have enough metal to build enough of them:
{{dp
|other_energy.tfc
|3290.73 Mtoe/year
|Global energy usage, total final consumption minus transport and industrial
|Source: Key World Energy Statistics 2020 (IEA report)<br /><br />Note: This is roughly the amount of on-grid energy consumption that we might need energy storage for. It consists of - for example - lighting, heating, appliances, and other energy used in homes and other buildings. We don't count ''industrial'' here, because we can assume (in principle) that most factories could operate during peak sunlight/wind, needing negligable energy storage.}}
{{dp
|storage_timescale
|24 hours
|How big the "buffer" of energy storage would have to be to be resiliant against weather fluctuations
|The exact number could be up for debate. Join the {{talk}}.
}}
{{dp
|flywheels.practical.energy_by_mass
|5 kWh per (450 kg)
|
|Based on this product as an example: http://www.rosseta.de/texte/pdat-t4.pdf
}}
{{dp
|flywheels.theoretical.energy_by_mass
|500 kJ/kg
|
|https://web.archive.org/web/20100710052927/http://www.pddnet.com/article-next-gen-of-flywheel-energy-storage/
}}
{{dp
|iron.reserves
|85 billion tonnes
|Global iron reserves - iron metal recoverable
|Source: Global iron ore reserves 2010-2021 - Statista
}}
{{dp
|iron.production
|1.95 billion tonnes/year
|
|Source: World crude steel production 2021 - Statista
<br /><br />The source doesn't specify whether this is steel from newly-mined iron or steel from recycling scrap. Probably it's both combined.
}}
{{calc
|other_energy.tfc * storage_timescale / flywheels.practical.energy_by_mass
|% iron.reserves
}}
{{calc
|other_energy.tfc * storage_timescale / flywheels.theoretical.energy_by_mass
|% iron.reserves
}}

How much [[energy]] would it take to refine all that steel?
{{dp
|energy.tfc
|9938 Mtoe/year
|Global total final energy consumption
|Source: Key World Energy Statistics 2020
}}
{{dp
|steel.recycled.production.energy_by_mass
|sqrt(1665*4170) watt hours per kg
|
|<cite>How much energy does it take (on average) to produce 1 kilogram of...</cite>https://www.lowtechmagazine.com/what-is-the-embodied-energy-of-materials.html
}}
{{dp
|steel.new.production.energy_by_mass
|sqrt(5550*13900) watt hours per kg
|
|<cite>How much energy does it take (on average) to produce 1 kilogram of...</cite>https://www.lowtechmagazine.com/what-is-the-embodied-energy-of-materials.html
}}
{{calc
|steel.new.production.energy_by_mass * other_energy.tfc * storage_timescale / flywheels.practical.energy_by_mass
|months energy.tfc
}}

==Energy in manufacturing==
However, the energy needed to ''manufacture'' the flywheels from the steel, might be vastly more. This page needs more research.


==Need for rare-earth magnets==
It is unknown how much of other metals might be needed to make the flywheel systems - for example the rare earth magnets involved in the motor/generator components. This page needs more research.

==Charge/discharge losses==
Solutions might need a lot of rare-earth magnets or energy in manufacturing.{{rn}}

==Suitable for vehicles?==
Flywheel-based vehicles have existed for over a century, but they don't store enough energy to last more than a kilometer. Perhaps vacuum-sealed electrical type of flywheel could store more energy {{x|this page needs to clarify this more in previous paragraphs}}, but would the bumps of the road cause energy losses too quickly? This page needs more research.

Archive:000/Flywheels - Revision history

Elie: Elie moved page Flywheels to Archive:000/Flywheels without leaving a redirect: Huge_refactor

Elie at 19:23, 2 September 2023