Lubricants & Energy Efficiency: Life-Cycle Analysis

2005 ◽  
pp. 565-572 ◽  
Author(s):  
R.I. Taylor ◽  
R.T. Dixon ◽  
F.D. Wayne ◽  
S. Gunsel
Keyword(s):  
Energy Efficiency ◽  
Life Cycle ◽  
Life Cycle Analysis

scholarly journals A Life Cycle Analysis of Deploying Coking Technology to Utilize Low-Rank Coal in China

2020 ◽  
Vol 12 (12) ◽  
pp. 4884
Author(s):  
Yan Li ◽  
Guoshun Wang ◽  
Zhaohao Li ◽  
Jiahai Yuan ◽  
Dan Gao ◽  
...  
Keyword(s):  
Energy Efficiency ◽  
Life Cycle ◽  
Life Cycle Analysis ◽  
Economic Benefits ◽  
Economic Feasibility ◽  
Environmental Benefits ◽  
Low Rank ◽  
Metallurgical Coke ◽  
Low Rank Coal ◽  
Coke Industry

At present, the excess capacity in China’s coke industry can be deployed to utilize some low-rank coal, replacing coking coal with potential economic gains, energy efficiency, and environmental benefits. This study presents a life cycle analysis to model these potential benefits by comparing a metallurgical coke technical pathway with technical pathways of gasification coke integrated with different chemical productions. The results show that producing gasification coke is a feasible technical pathway for the transformation and development of the coke industry. However, its economic feasibility depends on the price of cokes and coals. The gasification coke production has higher energy consumption and CO2 emissions because of its lower coke yield. Generally speaking, using gasification coke to produce F-T oils has higher economic benefits than producing methanol, but has lower energy efficiency and higher carbon emissions.

scholarly journals Pre-university students’ perceptions about the life cycle of bioplastics and fossil-based plastics

2020 ◽  
Vol 21 (3) ◽  
pp. 908-921
Author(s):  
Esther F. de Waard ◽  
Gjalt T. Prins ◽  
Wouter R. van Joolingen
Keyword(s):  
Energy Efficiency ◽  
Life Cycle ◽  
Content Knowledge ◽  
Scientific Knowledge ◽  
Life Cycle Analysis ◽  
Claim Data ◽  
Group Discussions ◽  
Sustainability Issue ◽  
Answering Questions ◽  
Toulmin’S Model

Sustainability has become a prominent theme in society and can be considered as an integral part of scientific citizenship. This study investigates to what extent the production, use and re-use of (bio)plastics initiates students’ reasoning and to identify the kind of content knowledge students put forward. The structure of students’ arguments was mapped according to Toulmin's model of argumentation, i.e., claim, data, warrant & backing and qualifier & rebuttals. Students (N = 27, grade 10 & 11) participated in groups of three. The students were introduced to the topic of the production, use and re-use of plastics by watching a video, answering questions, reading articles and having interviews and group discussions. Students were prompted to argue on the sustainability of bioplastics and fossil-based plastics. The results show that students frequently used arguments related to preventing pollution, designing to recycle and designing to degrade. However, themes such as avoiding waste, origin of energy and materials, energy efficiency and costs were rarely used or even absent in students’ reasoning. Overall, the students’ reasoning contained all of Toulmin's categories, and especially the increase in the number of qualifier & rebuttals is interpreted as an indication of awareness of the complexity of the issue at hand. This study underlines that students are able to bring in relevant scientific knowledge when confronted with a suitable sustainability issue, but also more societally oriented arguments enriched their perspective. Implications for the design of interventions aiming to engage students in life cycle analysis (on plastics) are discussed.

Life Cycle Analysis on Energy Efficiency and CO2 Emissions of China’s New Energy City Bus

2012 ◽  
Vol 512-515 ◽  
pp. 2598-2602 ◽  
Author(s):  
Dong Bo Yang ◽  
Li Liu ◽  
Ceng Zeng ◽  
Li Bo Han
Keyword(s):  
Energy Efficiency ◽  
Life Cycle ◽  
Life Cycle Analysis ◽  
Cycle Performance ◽  
Oil Consumption ◽  
City Bus ◽  
Electric Bus ◽  
New Energy ◽  
Wheel Model ◽  
Good Potential

Life cycle analysis provides global research methods for the assessment of life cycle performance. In this research, a WTW（well to wheel）model was introduced to study and compare the energy efficiency and CO2 emissions from diesel bus, CNG bus and electric bus. The results show that the WTW total energy efficiency of diesel bus is 1790MJ/100km. The energy efficiency of CNG bus is 6% lower than that of diesel bus, while the energy efficiency of electric bus is 36% higher than that of diesel bus. Both CNG bus and electric bus show good potential of oil replacement with oil consumption decrease of 98% and 90%. As more than 80% of China’s electricity is produced by coal, electric bus has equal effect as CNG bus on CO2 reduction. Compared to diesel bus, CO2 emissions from new energy bus are reduced by 14%.

Revisiting energy efficiency, renewability, and sustainability indicators in biofuels life cycle: Analysis and standardization proposal

2020 ◽  
Vol 252 ◽  
pp. 119850 ◽  
Author(s):  
Flávio Dias Mayer ◽  
Michel Brondani ◽  
Maria Cecilia Vasquez Carrillo ◽  
Ronaldo Hoffmann ◽  
Electo Eduardo Silva Lora
Keyword(s):  
Energy Efficiency ◽  
Life Cycle ◽  
Life Cycle Analysis ◽  
Sustainability Indicators
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