Energy return on investment (redirect from EROEI)
investment (EROI), also sometimes called energy returned on energy invested (ERoEI), is the ratio of the amount of usable energy (the exergy) delivered from...
43 KB (4,268 words) - 15:40, 23 May 2025
Embodied energy (section EROEI)
be multiplied by 1 EROEI-1 {\displaystyle {\frac {\hbox{1}}{\hbox{EROEI-1}}}} in order to get the embodied energy. Given an EROEI of eight, for example...
31 KB (3,147 words) - 16:44, 9 June 2025
processing, a ratio known as "Energy Returned on Energy Invested" (EROEI). An EROEI of 2 (or 2:1 ratio) would mean that to produce 2 barrels of actual...
32 KB (3,408 words) - 00:58, 4 June 2025
Elsevier under its "North Holland" imprint Energy returned on energy invested (EROEI), ratio of the amount of usable energy acquired from a particular energy...
2 KB (241 words) - 13:03, 28 July 2021
and intelligent energy management. Energy returned on energy invested (EROEI) is the ratio of energy delivered by an energy technology to the energy...
5 KB (444 words) - 20:38, 10 October 2024
efforts. The most studied of these may be Energy Return on Energy Invested or EROEI, discussed at length in an Encyclopedia of the Earth article and in an OilDrum...
36 KB (4,349 words) - 09:15, 18 June 2025
processes, the EROEI for oil shale is below the EROEI of about 20:1 for conventional oil extraction at the wellhead. A 1984 study estimated the EROEI of the different...
28 KB (3,286 words) - 01:53, 17 January 2025
limits to growth, overpopulation, overshoot, energy return on energy input (EROEI), taxation of energy resources, renewable energy alternatives, and resource...
21 KB (2,817 words) - 21:15, 13 February 2025
referred to as the Energy Return on Energy Investment (EROI or EROEI). Should the EROEI drops to one, or equivalently the Net energy gain falls to zero...
52 KB (6,193 words) - 01:08, 6 July 2025
and processing (Energy Returned on Energy Invested, or EROEI). A 1984 study estimated the EROEI of the various known oil shale deposits as varying between...
91 KB (8,775 words) - 01:59, 6 July 2025
accounting Energy & Environment Energy balance Energy policy Energy subsidy EROEI Industrial ecology International Energy Agency List of energy storage projects...
17 KB (1,695 words) - 22:15, 30 June 2025
modern statistics to show that marginal returns on investments in energy (EROEI), education and technological innovation are diminishing today. The globalised...
12 KB (1,413 words) - 20:03, 21 February 2025
EROEI). Currently, between one and five barrels of oil are recovered for each barrel-equivalent of energy used in the recovery process. As the EROEI drops...
56 KB (5,821 words) - 02:06, 6 July 2025
producers to be economical the ratio of energy returned on energy invested (EROEI) or energy return on investment (EROI) should be large enough. If the final...
37 KB (3,711 words) - 03:49, 22 April 2025
order to produce energy. To be useful the energy return on energy invested (EROEI) has to be greater than one. The net energy gain from the production of...
80 KB (9,248 words) - 01:49, 25 May 2025
a ratio known as "Energy Returned on Energy Invested" (EROEI). A 1984 study estimated the EROEI of the various known oil-shale deposits as varying between...
43 KB (4,229 words) - 01:40, 6 July 2025
Since a barrel of oil equivalent is about 6.117 gigajoules (1,699 kWh), its EROEI is 5–6. That means this extracts about 5 or 6 times as much energy as is...
144 KB (18,204 words) - 01:46, 17 June 2025
pumps. Cost of electricity by source Energy efficiency (disambiguation) EROEI Exergy efficiency Figure of merit Heat of combustion International Electrotechnical...
30 KB (3,025 words) - 16:38, 24 May 2025
living creatures is limited by the concept of energy return on investment (EROEI): that any living thing or living societies can survive only so long as...
10 KB (1,089 words) - 17:13, 16 June 2024
invested is a chief cause of the collapse of complex societies. Falling EROEI due to the depletion of non-renewable resources also poses a difficult challenge...
170 KB (19,880 words) - 18:52, 12 June 2025
reduced EROEI, and therefore put a brake on, and potentially reverse, long-term economic growth, leading to secular stagnation. Linked to the EROEI argument...
19 KB (2,211 words) - 22:17, 13 June 2025
CERA, which counts unconventional sources in reserves while discounting EROEI, believes that global production will eventually follow an “undulating plateau”...
61 KB (6,643 words) - 01:49, 6 July 2025
cyanobacteria is unfeasible, as the energy return on energy invested (EROEI) is unfavorable. The EROEI is not advantageous as numerous large, closed loop bioreactors...
31 KB (3,534 words) - 15:10, 23 May 2025
transport and distribution. After taking all three sectors into account, the EROEI (Energy Return over Energy Invested) for sugarcane ethanol is about 8. There...
196 KB (19,092 words) - 00:53, 6 July 2025
to the energy payback time, is the energy returned on energy invested (EROEI) or energy return on investment (EROI), which is the ratio of electricity...
108 KB (11,958 words) - 19:06, 27 June 2025
important consideration, as is the energy returned on energy invested (EROEI). Between these two factors, roughly 20% must be added to the energy of...
89 KB (8,674 words) - 00:50, 6 July 2025
existing petroleum infrastructure. The energy returned on energy invested (EROEI) of these processes is uncertain and/or has not been measured. Furthermore...
23 KB (2,767 words) - 06:03, 25 June 2025
and 3,702 MW in end 2010. In Lisbon, the energy payback time (see also EROEI) in the roof top solar photovoltaic (PV) technology is less than 2 years...
8 KB (509 words) - 16:04, 1 May 2025
A field known as energy analysis, itself associated with net energy and EROEI, arose to fulfill this analytic need. However, in energy analysis intractable...
19 KB (2,606 words) - 13:25, 26 March 2025
ERO—Electric Reliability Organization. The US designated NERC as its ERO. ERoEI—Energy returned on energy invested ERRA—Energy Regulators Regional Association...
46 KB (5,251 words) - 09:09, 4 July 2025