Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 8 of 8 for “"EROI"”.
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Environmental and economic tradeoffs of feedstock usage for liquid fuels and power production
… We quantify energy return on energy investment (EROI) as one metric for the sustainability of alternative jet fuel production. Lifecycle energy requirements are calculated and subsequently used for calculating three EROI variants. EROI₁ is defined as the ratio of the lower heating value (LHV) of …
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Physical and Economic Models of Natural Resource Scarcity: Theory and Application to Petroleum Development and Production in the Lower 48 United States, 1955-1985
… calculated the energy return on investment (EROI) for petroleum development and production. The EROI is the ratio of the petroleum energy added to reserves or produced to the energy used in the development and production process. The economic scarcity model calculated the average cost of …
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Energy, environment, and sustainability: a hierarchical analysis of south Louisiana
… a preliminary Energy Return on Investment (EROI) using a range of energy intensity ratios. The EROFI for ultra-deepwater oil and gas at the wellhead was roughly 0.85 gallons, per dollar. These estimates of EROI for 2009 ultra-deepwater oil and natural gas at the wellhead ranged from 7–22:1. …
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Integrated Energy and Environmental Analysis of Utility-Scale Wind Power Production
… units; Energy Return on Energy Investment (EROI) was quantified to explore the net energy yield of the facility. EROI and emergy analyses suggested that Maple Ridge is a sustainable enterprise with moderate environmental impact relative to other electricity generation facilities. …
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Modeling and communicating the dynamics of energy market
… without perturbations with a worldwide average EROI that varies from 60 (1965) to 15 (2014). Similarly, I picked up the value of world production in 1965 (1,567 Million ton/years) and the same value in 2014 (4,220 Million ton/years) and I assumed a constant increment of the production. …
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Energy and Environmental Tools for Process Sustainability Evaluation
… to answer that question: the Analogical Model, EROI (Energy Return On Investment) and EPT (Energy Payback Time), SEI (Environmental Sustainability Index). The uncertainty is treated in a dedicated chapter. The first section of the thesis is dedicated to a theoretical analysis of those arguments, …
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Renewable energy in Sicily: sizing of a plant for Biogas production and energetic assessment of Biodiesel production from oilseed crops
… used compared to that obtained, by means of EROI index; to analyse the mechanical pressing of seeds in terms of a) vegetable oil yields and chemical characteristics; b) machine work capacity; c) energy consumptions; d) characterization of the operating parameters of the screw press plant; to …
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Biofuels from Liquefaction of Marine Microalgae: Production, Upgrading, and Environmental Impacts
… A viable energy return on investment (EROI) was calculated when algae were processed at lab-scale using a coagulation-flocculation harvesting method. For the field-scale scenario, EROI was near to 1 and comparable to other conventional terrestrial biofuels. Overall, this dissertation …