Year in review—EROI or energy return on (energy) invested

  title={Year in review—EROI or energy return on (energy) invested},
  author={D. J. Murphy and Charles A. S. Hall},
  journal={Annals of the New York Academy of Sciences},
There have been five foremost empirical efforts regarding energy return on investment (EROI) analysis over the past few years, including the topics of: (1) whether corn ethanol is a net energy yielder; (2) a summary of the state of EROI for most major fuel types; (3) alternative applications of EROI, such as energy return on water invested (EROWI); (4) the relation between EROI and the economy; and (5) an attempt to calculate the minimum EROI for a sustainable society. This paper offers a… Expand
New perspectives on the energy return on (energy) investment (EROI) of corn ethanol
Research on corn ethanol is overly focused on whether corn ethanol is a net energy yielder and, consequently, has missed some other fundamental issues, including (1) whether there is significantExpand
Energy Return on Investment (EROI) for Distributed Power Generation from Low-Temperature Heat Sources Using the Organic Rankine Cycle
Energy Return on (Energy) Investment, EROI, is a measure of the future energy benefit from energy expenditure. EROI can be used in addition to price signals to determine how an energy technologyExpand
The implications of the declining energy return on investment of oil production
  • D. J. Murphy
  • Economics, Medicine
  • Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences
  • 2014
It is concluded that, as the EROI of the average barrel of oil declines, long-term economic growth will become harder to achieve and come at an increasingly higher financial, energetic and environmental cost. Expand
The energy return on energy investment (EROI) of photovoltaics: Methodology and comparisons with fossil fuel life cycles
A high energy return on energy investment (EROI) of an energy production process is crucial to its long-term viability. The EROI of conventional thermal electricity from fossil fuels has been viewedExpand
Energy Return on Investment (EROI) and Life Cycle Analysis (LCA) of biofuels in Ecuador
The Energy Return on Investment (EROI) for bioethanol and biodiesel is determined to address the issue of unknown or unnoticed net energy contribution of biofuels in Ecuador and suggests feasibility only for sugarcane in the case of ethanol. Expand
Analysis of Point-of-Use Energy Return on Investment and Net Energy Yields from China’s Conventional Fossil Fuels
There is a strong correlation between net energy yield (NEY) and energy return on investment (EROI). Although a few studies have researched the EROI at the extraction level in China, none haveExpand
Life-Cycle Assessment: The Energy Return on Invested of Biodiesel
Abstract High oil prices are driving renewed interest in biofuels, including biodiesel in the hope that it can substitute for petroleum-derived diesel. Although many criteria must be used toExpand
Calculating systems-scale energy efficiency and net energy returns: A bottom-up matrix-based approach
In this paper we expand the work of Brandt and Dale (2011) on ERRs (energy return ratios) such as EROI (energy return on investment). This paper describes a “bottom-up” mathematical formulation whichExpand
Declines in EROI of Main Fuels and the Implications on Developing LNG as a Marine Fuel
This article proposes an analytical model for a conversion from Heavy Fuel Oil (HFO) to Liquide Natural Gas(LNG) dual-fuel engine in a fleet with three sizes of vessels in order to investigate theExpand
Energy return on investment of hydroelectric power generation calculated using a standardised methodology
The aim was to study the Energy Return on Investment (EROI) for the Fljotsdalsstod hydroelectric power plant (690 MW) using real data and a previously proposed standard. Energy return on investmentExpand


Energy Return on Investment: Toward a Consistent Framework
This article establishes a theoretical framework for EROI analysis that encompasses the various methodologies extant in the literature and establishes variations of E ROI analysis in two different dimensions based on the costs they include and their handling of nonenergy resources. Expand
Meta-analysis of net energy return for wind power systems
This analysis reviews and synthesizes the literature on the net energy return for electric power generation by wind turbines. Energy return on investment (EROI) is the ratio of energy delivered toExpand
Burning Water: A Comparative Analysis of the Energy Return on Water Invested
The results suggest that the most water-efficient, fossil-based technologies have an EROWI one to two orders of magnitude greater than the mostWater-efficient biomass technologies, implying that the development of biomass energy technologies in scale sufficient to be a significant source of energy may produce or exacerbate water shortages around the globe and be limited by the availability of fresh water. Expand
A Preliminary Investigation of Energy Return on Energy Investment for Global Oil and Gas Production
Economies are fueled by energy produced in excess of the amount required to drive the energy production process. Therefore any successful society’s energy resources must be both abundant andExpand
Net energy from the extraction of oil and gas in the United States
One technique for evaluating the costs of energy systems is net energy analysis, which compares the quantity of energy delivered to society by an energy system to the energy used directly andExpand
Ethanol's energy return on investment: a survey of the literature 1990-present.
  • R. Hammerschlag
  • Medicine, Environmental Science
  • Environmental science & technology
  • 2006
An objective look at the disagreement in the energy return on investment of ethanol manufacture is taken by normalizing and comparing the data sets from ten studies, which treat starch ethanol from corn, and four treat cellulosic ethanol. Expand
Peak Oil, EROI, Investments and the Economy in an Uncertain Future
The issues surrounding energy are far more important, complex and pervasive than normally considered from the perspective of conventional economics, and they will be extremely resistant toExpand
Energy and the U.S. Economy: A Biophysical Perspective
A series of hypotheses is presented about the relation of national energy use to national economic activity (both time series and cross-sectional) which offer a different perspective from standardExpand
What is the Minimum EROI that a Sustainable Society Must Have
Economic production and, more generally, most global societies, are overwhelmingly dependant upon depleting supplies of fossil fuels. There is considerable concern amongst resource scientists, if notExpand
Economic input-output life-cycle assessment of trade between Canada and the United States.
The findings show that accounting for trade can significantly alter the results of life-cycle assessment studies, particularly for many Canadian manufacturing sectors, and the production/consumption of goods in one country often exerts significant energy- and GHG-influences on the other. Expand