investment (EROI), also sometimes called energy returned on energy invested (ERoEI), is the ratio of the amount of usable energy (the exergy) delivered from...

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...

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...

and intelligent energy management. Energy returned on energy invested (EROEI) is the ratio of energy delivered by an energy technology to the energy...

Elsevier under its "North Holland" imprint Energy returned on energy invested (EROEI), ratio of the amount of usable energy acquired from a particular energy...

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...

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...

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...

limits to growth, overpopulation, overshoot, energy return on energy input (EROEI), taxation of energy resources, renewable energy alternatives, and resource...

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...

modern statistics to show that marginal returns on investments in energy (EROEI), education and technological innovation are diminishing today. The globalised...

accounting Energy & Environment Energy balance Energy policy Energy subsidy EROEI Industrial ecology International Energy Agency List of energy storage projects...

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...

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...

pumps. Cost of electricity by source Energy efficiency (disambiguation) EROEI Exergy efficiency Figure of merit Heat of combustion International Electrotechnical...

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...

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...

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...

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...

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...

reduced EROEI, and therefore put a brake on, and potentially reverse, long-term economic growth, leading to secular stagnation. Linked to the EROEI argument...

CERA, which counts unconventional sources in reserves while discounting EROEI, believes that global production will eventually follow an “undulating plateau”...

cyanobacteria is unfeasible, as the energy return on energy invested (EROEI) is unfavorable. The EROEI is not advantageous as numerous large, closed loop bioreactors...

transport and distribution. After taking all three sectors into account, the EROEI (Energy Return over Energy Invested) for sugarcane ethanol is about 8. There...

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...

existing petroleum infrastructure. The energy returned on energy invested (EROEI) of these processes is uncertain and/or has not been measured. Furthermore...

important consideration, as is the energy returned on energy invested (EROEI). Between these two factors, roughly 20% must be added to the energy of...

A field known as energy analysis, itself associated with net energy and EROEI, arose to fulfill this analytic need. However, in energy analysis intractable...

ERO—Electric Reliability Organization. The US designated NERC as its ERO. ERoEI—Energy returned on energy invested ERRA—Energy Regulators Regional Association...

While the EROEI and economics of corn based ethanol are a bit weak, it paves the way for cellulosic ethanol which should have much better EROEI and economics...