Archive:000/Energy storage/EROI - Revision history

Elie: Elie moved page Energy storage/EROI to Archive:000/Energy storage/EROI without leaving a redirect: Huge_refactor

2024-10-26T20:29:41Z

Elie moved page Energy storage/EROI to Archive:000/Energy storage/EROI without leaving a redirect: Huge_refactor

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

Elie: /* Other metrics */

2023-03-28T05:03:11Z

Other metrics

← Older revision		Revision as of 01:03, 28 March 2023
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	==Other metrics==		==Other metrics==
	* [[energy_storage/labor]]		* [[energy_storage/labor]]

			==See also==
			* [[Life cycle analysis]]

Elie: /* Overview */

2023-03-28T05:02:02Z

Overview

← Older revision		Revision as of 01:02, 28 March 2023
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			'''Importance:''' ''The lower the EROI of energy storage, the more [[energy]] we're going to need to replace [[fossil fuels]].''

	==Overview==		==Overview==

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	<code>energy_invested</code> should include a few things:		<code>energy_invested</code> should include a few things:
	* the energy it takes to manufacture or construct the energy storage{{x\|~~preferably including~~ the energy needed to mine the materials. ~~For~~ any estimate~~, we must be clear about~~ ''whether or not'' this is ~~counted~~.}}		* the energy it takes to manufacture or construct the energy storage{{x\|This could ''include'' the energy needed to mine the materials. Or not. It's fine either way - but any estimate should ''specify'' whether or not this is included.}}
	* the energy used during its operation ('''charging''')		* the energy used during its operation ('''charging''')
	* the energy it takes to recycle or dismantle the energy storage at its end-of-life		* the energy it takes to recycle or dismantle the energy storage at its end-of-life
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	An <code>EROI = 0.5</code> represents a grand total efficiency of 50%. Over the course of its lifetime, for all its usable stored energy, "only" 2x as much energy ever went into the thing.		An <code>EROI = 0.5</code> represents a grand total efficiency of 50%. Over the course of its lifetime, for all its usable stored energy, "only" 2x as much energy ever went into the thing.


	~~'''Importance: ''' ''The lower the EROI of energy storage, the more [[energy]] we're going to need to replace [[fossil fuels]].''~~

	==Table==		==Table==

Elie: Created page with "==Overview== EROI = Energy Return On Investment. It's a concept often used for assessing the viability of energy sources such as solar, nuclear, etc. But I believe it also needs to be applied to energy storage. EROI = energy_returned / energy_invested `energy_invested` should include a few things: * the energy it takes to manufacture or construct the energy storage{{x|preferably including the energy needed to mine the mater..."

2023-03-28T03:27:16Z

Created page with "==Overview== EROI = Energy Return On Investment. It's a concept often used for assessing the viability of energy sources such as solar, nuclear, etc. But I believe it also needs to be applied to energy storage. EROI = energy_returned / energy_invested <code>energy_invested</code> should include a few things: * the energy it takes to manufacture or construct the energy storage{{x|preferably including the energy needed to mine the mater..."

New page

==Overview==

[[EROI]] = Energy Return On Investment.

It's a concept often used for assessing the [[Term:viable|viability]] of energy sources such as [[solar]], [[nuclear]], etc.

But I believe it also needs to be applied to [[energy storage]].
EROI = energy_returned / energy_invested

<code>energy_invested</code> should include a few things:
* the energy it takes to manufacture or construct the energy storage{{x|preferably including the energy needed to mine the materials. For any estimate, we must be clear about ''whether or not'' this is counted.}}
* the energy used during its operation ('''charging''')
* the energy it takes to recycle or dismantle the energy storage at its end-of-life

<code>energy_returned</code> should include:
* the energy obtained during its operation ('''discharging''')

For batteries with a lifespan defined by a finite number of charge/discharge cycles:
energy_invested = capacity*lifespan_cycles/charge_discharge_efficiency + energy_in_manufacturing + energy_in_recycling
energy_returned = capacity*lifespan_cycles

Unlike energy ''sources'', energy storage can never have an <code>EROI >= 1</code>. But we aim to bring it ''close'' to 1, or at least reach <code>EROI >= 0.5</code>.

An <code>EROI = 0.5</code> represents a grand total efficiency of 50%. Over the course of its lifetime, for all its usable stored energy, "only" 2x as much energy ever went into the thing.

'''Importance: ''' ''The lower the EROI of energy storage, the more [[energy]] we're going to need to replace [[fossil fuels]].''

==Table==

We need to analyze all the main energy storage options, and put them in a table to compare their EROI.

''The table should go here...''

==Other metrics==
* [[energy_storage/labor]]