scholarly journals Review on: Multi - Objective optimization of Composite Automobile over Drive Shaft

2019 ◽  
Vol 7 (3) ◽  
pp. 44-47
Author(s):  
Miss. Sushmita H. Kshirsagar et al.
Keyword(s):  
Supply Chain ◽  
Life Cycle ◽  
Optimal Strategies ◽  
High Strength ◽  
Fiber Reinforced Polymers ◽  
Generic Model ◽  
Optimization Strategy ◽  
Economic Criterion ◽  
Environmental Objectives ◽  
Recycled Fibers

Composites is increasingly used in different applications in the last decade, especially in aerospace due to their high strength and lightweight characteristics. Indeed, the latest models of Airbus (A350) and Boeing (B787) have employed more than 50 wt% of composites, mainly Carbon Fiber Reinforced Polymers (CFRP). Yet, the increased use of CFRP has raised the environmental concerns about their end-of-life related to waste disposal, consumption of non-renewable resources for manufacturing and the need to recycle CFRP wastes. In this study, generic model is developed in order to propose an optimal management of aerospace CFRP wastes taking into account economic and environmental objectives. Initially, a life-cycle systemic approach is used to model the environmental impacts of CFRP recycling processes focusing on Global Warming Potential (GWP) following the guidelines of Life Cycle Assessment (LCA). The whole supply chain for recycling CFRP pathways is then modeled from aircraft dismantling sites to the reuse of recycled fibers in various applications. A multiobjective optimization strategy based on mathematical programming, ε-constraint and lexicographic methods with appropriate decision-making techniques (M-TOPSIS, PROMETHEE-GAIA) has been developed to determine CFRP waste supply chain configurations. Different scenarios have been studied in order to take account the potential of existing recycling sites in a mono-period visions as well as the deployment of new sites in a multi-period approach considering the case study of France for illustration purpose. The solutions obtained from optimization process allow developing optimal strategies for the implementation of CFRP recovery with recycled fibers (of acceptable quality) for the targeted substitution use while minimizing cost /maximizing profit for an economic criterion and minimizing an environmental impact based on GWP.

A Framework for Evaluating R&D Impacts and Supply Chain Dynamics Early in a Product Life Cycle. Looking inside the black box of innovation

2014 ◽  
Author(s):  
Gretchen Jordan ◽  
Jonathan Mote ◽  
Rosalie Ruegg ◽  
Thomas Choi ◽  
Angela Becker-Dippmann
Keyword(s):  
Supply Chain ◽  
Life Cycle ◽  
Product Life Cycle ◽  
Black Box ◽  
Chain Dynamics ◽  
Product Life ◽  
Supply Chain Dynamics

scholarly journals A Multi-Objective Approach toward Optimal Design of Sustainable Integrated Biodiesel/Diesel Supply Chain Based on First- and Second-Generation Feedstock with Solid Waste Use

Energies ◽  
2021 ◽  
Vol 14 (8) ◽  
pp. 2261
Author(s):  
Evgeniy Ganev ◽  
Boyan Ivanov ◽  
Natasha Vaklieva-Bancheva ◽  
Elisaveta Kirilova ◽  
Yunzile Dzhelil
Keyword(s):  
Supply Chain ◽  
Optimal Design ◽  
Solid Waste ◽  
Second Generation ◽  
Agricultural Land ◽  
Optimization Problems ◽  
Biodiesel Production ◽  
Mixed Integer ◽  
Economic Criterion ◽  
Multi Objective

This study proposes a multi-objective approach for the optimal design of a sustainable Integrated Biodiesel/Diesel Supply Chain (IBDSC) based on first- (sunflower and rapeseed) and second-generation (waste cooking oil and animal fat) feedstocks with solid waste use. It includes mixed-integer linear programming (MILP) models of the economic, environmental and social impact of IBDSC, and respective criteria defined in terms of costs. The purpose is to obtain the optimal number, sizes and locations of bio-refineries and solid waste plants; the areas and amounts of feedstocks needed for biodiesel production; and the transportation mode. The approach is applied on a real case study in which the territory of Bulgaria with its 27 districts is considered. Optimization problems are formulated for a 5-year period using either environmental or economic criteria and the remainder are defined as constraints. The obtained results show that in the case of the economic criterion, 14% of the agricultural land should be used for sunflower and 2% for rapeseed cultivation, while for the environmental case, 12% should be used for rapeseed and 3% for sunflower. In this case, the price of biodiesel is 14% higher, and the generated pollutants are 6.6% lower. The optimal transport for both cases is rail.

scholarly journals Life Cycle Blue and Grey Water in the Supply Chain of China’s Apparel Manufacturing

Processes ◽  
2021 ◽  
Vol 9 (7) ◽  
pp. 1212
Author(s):  
Ao Liu ◽  
Aixi Han ◽  
Li Chai
Keyword(s):  
Water Pollution ◽  
Supply Chain ◽  
Life Cycle ◽  
Water Consumption ◽  
Agricultural Sector ◽  
Oxygen Demand ◽  
High Water ◽  
Grey Water ◽  
Apparel Manufacturing ◽  
Economic Output

Apparel manufacturing involves high water consumption and heavy water pollution in its supply chain, e.g., planting cotton, producing chemical fibers, and dyeing. This study employs a multi-regional input–output (MRIO) model to (1) assess the life cycle of blue and grey water (chemical oxygen demand (COD) specific) of China’s apparel manufacturing; (2) reveal the hidden linkage among sectors and regions in the whole supply chain; and (3) identify the key regions and upstream sectors with the most water consumption and heaviest water pollution. We found that the agricultural sector (i.e., planting fiber crops) is responsible for primary water consumption and water pollution. In addition, different provinces assume different production roles. Guangdong is a major output province in apparel manufacturing. However, its economic output is contributed to by other regions, such as blue water from Xinjiang and Jiangsu and grey water from Hebei and Shandong. Our research reveals the significance of taking an inter-regional perspective on water resource issues throughout the supply chain in apparel manufacturing. The sustainable development of China’s apparel manufacturing relies on improving water-use efficiency and reasonable industrial layout. The results are of significance and informative for policymakers to build a water-sustainable apparel industry.

scholarly journals Environmental Impact Associated with the Supply Chain and Production of Biodiesel from Jatropha curcas L. through Life Cycle Analysis

2018 ◽  
Vol 10 (5) ◽  
pp. 1451 ◽  
Author(s):  
Mario Giraldi-Díaz ◽  
Lorena De Medina-Salas ◽  
Eduardo Castillo-González ◽  
Max De la Cruz-Benavides
Keyword(s):  
Supply Chain ◽  
Life Cycle ◽  
Environmental Impact ◽  
Jatropha Curcas ◽  
Life Cycle Analysis ◽  
Jatropha Curcas L

Life cycle assessment of a leather shoe supply chain

2021 ◽  
pp. 1-18
Author(s):  
Marta Rossi ◽  
Alessandra Papetti ◽  
Marco Marconi ◽  
Michele Germani
Keyword(s):  
Life Cycle Assessment ◽  
Supply Chain ◽  
Life Cycle

scholarly journals Are Renewables as Friendly to Humans as to the Environment?: A Social Life Cycle Assessment of Renewable Electricity

2019 ◽  
Vol 11 (5) ◽  
pp. 1370 ◽  
Author(s):  
Shutaro Takeda ◽  
Alexander Keeley ◽  
Shigeki Sakurai ◽  
Shunsuke Managi ◽  
Catherine Norris
Keyword(s):  
Life Cycle Assessment ◽  
Supply Chain ◽  
Life Cycle ◽  
Social Life ◽  
Electricity Production ◽  
Social Life Cycle Assessment ◽  
Solar Photovoltaic ◽  
Energy Technologies ◽  
Electricity Mix ◽  
The Impact

The adoption of renewable energy technologies in developing nations is recognized to have positive environmental impacts; however, what are their effects on the electricity supply chain workers? This article provides a quantitative analysis on this question through a relatively new framework called social life cycle assessment, taking Malaysia as a case example. Impact assessments by the authors show that electricity from renewables has greater adverse impacts on supply chain workers than the conventional electricity mix: Electricity production with biomass requires 127% longer labor hours per unit-electricity under the risk of human rights violations, while the solar photovoltaic requires 95% longer labor hours per unit-electricity. However, our assessment also indicates that renewables have less impacts per dollar-spent. In fact, the impact of solar photovoltaic would be 60% less than the conventional mix when it attains grid parity. The answer of “are renewables as friendly to humans as to the environment?” is “not-yet, but eventually.”

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