scholarly journals Comparing Apples to Apples: Why the Net Energy Analysis Community Needs to Adopt the Life-Cycle Analysis Framework

Energies ◽  
2016 ◽  
Vol 9 (11) ◽  
pp. 917 ◽  
Author(s):  
David Murphy ◽  
Michael Carbajales-Dale ◽  
Devin Moeller
Keyword(s):  
Life Cycle ◽  
Life Cycle Analysis ◽  
Energy Analysis ◽  
Net Energy ◽  
Analysis Framework ◽  
Community Needs

Comparative Life-cycle Analysis of Photovoltaics Based on Nano-materials: A Proposed Framework

2007 ◽  
Vol 1041 ◽  
Author(s):  
Hyung Chul Kim ◽  
V. Fthenakis ◽  
S. Gualtero ◽  
R. van der Meulen ◽  
H. C. Kim
Keyword(s):  
Life Cycle ◽  
Life Cycle Analysis ◽  
Energy Production ◽  
New Technologies ◽  
Nano Materials ◽  
Analysis Framework ◽  
New Energy ◽  
New Material ◽  
Material Utilization ◽  
Conversion Efficiencies

AbstractLife cycle analysis becomes especially important for characterizing new material forms in new energy generation technologies intended to replace or improve the current infrastructure of energy production. We propose a comparative life-cycle analysis framework for investigating the effect of introducing nanotechnology in the life cycle of new photovoltaics, which focuses on the differences between the new technologies and the ones that they may replace. The following parameters are investigated within this framework: methods of synthesizing nanoparticles, physicochemical specifications of the precursors, material utilization rates, deposition rates, energy-conversion efficiencies, and lifetime expectancy of the final product. We introduce the application of this framework in comparing nano-structured cadmium telluride and silicon films with their nano- and amorphous- structured equivalents.

Process Simulation Integrated Life Cycle Net Energy Analysis and GHG Assessment of Fuel-Grade Bioethanol Production from Unutilized Rice Straw

2021 ◽  
Author(s):  
Piyumali Mewanthika Jayasundara ◽  
Thisara Kaveendra Jayasinghe ◽  
Mahinsasa Rathnayake
Keyword(s):  
Life Cycle ◽  
Rice Straw ◽  
Process Simulation ◽  
Energy Analysis ◽  
Life Stage ◽  
Energy Gain ◽  
Allocation Rule ◽  
Production Plant ◽  
Net Energy ◽  
Bioethanol Production

Abstract The life cycle stage of paddy rice cultivation can be excluded with a zero-inventory allocation rule for the life cycle scenario of bioethanol production from unutilized rice straw, i.e., rice straw with no applied valorization in current practice. Accordingly, this study evaluates the life cycle net energy analysis and greenhouse gas (GHG) assessment for a scaled-up bioethanol production plant using unutilized rice straw as the feedstock. The process simulation technique is integrated to model a scaled-up production plant to produce bioethanol at 99.7 vol% purity from unutilized rice straw, and the simulation results are retrieved to calculate inventory data for life cycle assessment (LCA). The simulated mass flow and energy flow results are comparable with that of real plants, reported in the published literature, which validates the process simulations in this study. Inclusive of energy generation using the waste flows in the process (i.e., wastewater and solid residues), the life cycle net energy analysis results show a net energy gain of 7,804.0 MJ/m3 of bioethanol with a net renewable energy gain of 38,230.9 MJ/m3 of bioethanol that corresponds to a net energy ratio of 1.20 and renewability factor of 5.49. The life cycle GHG assessment exhibits a net global warming potential of 584.8 kg CO2 eq./m3 of bioethanol. The effect of system boundary expansion up to the end-of-life stage as gasohol (E10), the sensitivity of the key process parameters, and the economic benefit via valorization of unutilized rice straw are further analyzed and discussed.

scholarly journals An approach to prospective consequential life cycle assessment and net energy analysis of distributed electricity generation

Energy Policy ◽  
2017 ◽  
Vol 100 ◽  
pp. 350-358 ◽  
Author(s):  
Christopher Jones ◽  
Paul Gilbert ◽  
Marco Raugei ◽  
Sarah Mander ◽  
Enrica Leccisi
Keyword(s):  
Life Cycle Assessment ◽  
Life Cycle ◽  
Electricity Generation ◽  
Energy Analysis ◽  
Net Energy ◽  
Consequential Life Cycle Assessment

scholarly journals Net energy analysis and life cycle energy assessment of electricity supply in Chile: Present status and future scenarios

Energy ◽  
2018 ◽  
Vol 162 ◽  
pp. 659-668 ◽  
Author(s):  
Marco Raugei ◽  
Enrica Leccisi ◽  
Vasilis Fthenakis ◽  
Rodrigo Escobar Moragas ◽  
Yeliz Simsek
Keyword(s):  
Life Cycle ◽  
Present Status ◽  
Energy Analysis ◽  
Electricity Supply ◽  
Net Energy ◽  
Future Scenarios ◽  
Energy Assessment

scholarly journals Life Cycle Energy Analysis and Evaluation of Retreaded Engineering Tires

2021 ◽  
Vol 271 ◽  
pp. 02012
Author(s):  
Wang Qiang ◽  
Jiang Li ◽  
Wang Yunlong ◽  
Wang Guotian ◽  
Zhang peng
Keyword(s):  
Life Cycle ◽  
Energy Consumption ◽  
Life Cycle Analysis ◽  
Energy Analysis ◽  
Calculation Model ◽  
Analysis And Evaluation ◽  
Energy Evaluation ◽  
Energy Consumption Analysis ◽  
Life Cycle Stages ◽  
Life Cycle Energy Analysis

In this paper, energy consumption models of retreaded engineering tires were constructed based on life cycle analysis, theoretical calculation model, and energy consumption method during the four stages of retreaded engineering tires, i.e., production, transportation, usage, and recycling stage. The energy substitute model and energy evaluation index during the recycling stage, which involves one of five classical retreaded engineering tire recycling methods, i.e., secondary retreading, mechanical smash, low-temperature smash, combustion decomposition, and combustion power generation, were presented. Life cycle energy analysis of retreaded engineering tires was conducted, and the energy consumption during the different life cycle stages was quantitatively analyzed, thus obtaining the energy restoration rate of the five classical recycling stages of retreaded engineering tires. Energy consumption analysis and energy evaluation at different stages were performed. Main conclusions indicate that the energy consumption during the production stage is the highest, and energy consumption during the transportation stage is the lowest. The energy recycling result of the secondary retreading or combustion decomposition of retreaded engineering tires is obtained.

Estimation of Recoverable Household Waste Cooking Oil and Life Cycle Analysis of Biodiesel Fuel Production

2008 ◽  
Vol 4 (4) ◽  
pp. 318-323 ◽  
Author(s):  
Hirotsugu KAMAHARA ◽  
Shun YAMAGUCHI ◽  
Ryuichi TACHIBANA ◽  
Naohiro GOTO ◽  
Koichi FUJIE
Keyword(s):  
Life Cycle ◽  
Life Cycle Analysis ◽  
Waste Cooking Oil ◽  
Household Waste ◽  
Biodiesel Fuel ◽  
Fuel Production ◽  
Cooking Oil
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