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A closed-loop supply chain considering carbon reduction, quality improvement effort, and return policy under two remanufacturing scenarios
, Article Journal of Cleaner Production ; Volume 232 , 2019 , Pages 1230-1250 ; 09596526 (ISSN) ; Alizadeh Basban, N ; Akhavan Niaki, S. T ; Sharif University of Technology
Elsevier Ltd
2019
Abstract
In today's competitive supply chains, providing products which can stimulate the customer's demand and enhance the revenues of companies is an important objective. Therefore, three stimulating factors, including the carbon emission reduction, return policy and quality improvement efforts are taken into consideration in a supply chain (SC). In line with reducing carbon emission, two possibilities in the forward flow, including the technologies investment and the trade and cap are employed. In the reverse flow, hybrid remanufacturing of the imperfect quality products under technology license is investigated. The impacts of collecting-remanufacturing processes on carbon reduction, quality...
Toward sustainable optimization with stackelberg game between green product family and downstream supply chain
, Article Sustainable Production and Consumption ; Volume 23 , 2020 , Pages 198-211 ; Shirazi, B ; Mahdavi, I ; Mahdavi Amiri, N ; Sharif University of Technology
Elsevier B.V
2020
Abstract
Green products are increasingly considered by companies, owing to the significant attention of government regulations, customers’ requests and competitors. Here, we deal with Green Product Families (GPFs) by selecting green components, modules and products which are produced based on the assembling to order (ATO) approach to cover diverse customer needs. Designing a GPFs is important but not sufficient for sustainable optimization. In fact, we need to simultaneously consider the supply chain of a GPF to control the pollution generated in the downstream supply chain. For a sustainable optimization approach, this joint configuration is usually structured based on economic, environmental and...
Probabilistic optimization of networked multi-carrier microgrids to enhance resilience leveraging demand response programs
, Article Sustainability (Switzerland) ; Volume 13, Issue 11 , 2021 ; 20711050 (ISSN) ; Amir, V ; Habibifar, R ; Golmohamadi, H ; Sharif University of Technology
MDPI AG
2021
Abstract
Microgrids have emerged as a practical solution to improve the power system resilience against unpredicted failures and power outages. Microgrids offer substantial benefits for customers through the local supply of domestic demands as well as reducing curtailment during possible disruptions. Furthermore, the interdependency of natural gas and power networks is a key factor in energy systems’ resilience during critical hours. This paper suggests a probabilistic optimization of networked multi-carrier microgrids (NMCMG), addressing the uncertainties associated with thermal and electrical demands, renewable power generation, and the electricity market. The approach aims to minimize the NMCMG...
A sustainable supply chain under VMI-CS agreement with withdrawal policies for imperfect items
, Article Journal of Cleaner Production ; Volume 376 , 2022 ; 09596526 (ISSN) ; Fallahi, A ; Mokhtari, H ; Sharif University of Technology
Elsevier Ltd
2022
Abstract
Supply Chain (SC) coordination, quality requirements, and environmental issues are the main areas of interest within the field of inventory management. Few studies have integrated these concepts into an inventory problem despite its overwhelming necessity. In this direction, this paper deals with a vendor-buyer SC under the Vendor-Managed Inventory with Consignment Stock (VMI-CS) agreement. According to the agreement, the vendor bears the buyer's financial holding cost in return for the storage of products in the buyer's warehouse. Further, each shipment involves a random fraction of repairable items, which need to be withdrawn from the inventory system. Unlike the existing literature, when...
Location and Allocation Problem with Environmental Regulations
, M.Sc. Thesis Sharif University of Technology ; Shavandi, Hassan (Supervisor)
Abstract
In This article, we aimed to estimate impact of dual sourcing strategy on environmental implication and show how this strategy can ameliorate the emission of greenhouse gases. For this purpose, first we define comprehensive NLP models for splitting order problem with carbon emission cap and carbon emission Trade-Cap policy. Then customized sequential quadratic programming approach had been developed for solving these models. In addition, customized Genetic Algorithm validated this approach. Finally numerical results show that order splitting strategy cause to reduction in costs and emission at same time. Beside this outcome, we show the so-called Trade- Cap policy almost performs better than...
Solving a Flexible, Multi-Objective Multi-Depot VRP and IRP Considering 3DP and Sustainability with Several Levels in the Transportation Network
, M.Sc. Thesis Sharif University of Technology ; Haji, Alireza (Supervisor) ; Fatahi Valilai, Omid (Supervisor)
Abstract
A sustainable supply chain requires constant sustainable changes in the design and performance of its steps. The main characteristic of sustainability is the consideration of social, environmental and economic criteria in strategic and operational decisions. Due to the great importance of the sustainability in transportation network, proper planning and careful design for this issue in recent years has been considered and welcomed by relevant researchers. In this research we want to provide an integrated frame work for transportation network design toward sustainability. In this regard, we also use 3D printing technology as our innovation in operations. Our main issue is the Inventory...
Investigating the impacts of retrofitted CNG vehicles on air pollutant emissions in Tehran
, Article International Journal of Environmental Research ; Volume 7, Issue 3 , 2013 , Pages 669-678 ; 17356865 (ISSN) ; Mansouri, N ; Morady, M. A ; Sharif University of Technology
2013
Abstract
The present study was conducted to investigate the impacts of retrofitted CNG vehicles on air pollutant emissions in Tehran over a 20 years period using available statistical data, precise automobile tests, data analysis, and LEAP Software. The obtained results revealed an increase in air pollutant emissions including CO (equal to 1030.77 thousand tons), NOx (equal to 1030.77 thousand tons), THC (269.02 thousand tons) and CO2 (equal to 38.43 thousand tons) resulting from utilizing retrofitted CNG vehicles within the studied period. Considering the obtained results, if the current trend of producing retrofitted CNG vehicles continues, a total cost of 435 million USD will impose on the...
Drag reduction ability of slippery liquid-infused surfaces: A review
, Article Progress in Organic Coatings ; Volume 170 , 2022 ; 03009440 (ISSN) ; Nouri Borujerdi, A ; Moosavi, A ; Sharif University of Technology
Elsevier B.V
2022
Abstract
Devising effective methods to reduce drag forces is of great interest as these methods could prevent the wastage of fuel and decrease carbon emission and the global warming rate. Since the invention of Liquid-Infused Surfaces (LISs) in 2011, numerous investigations have been conducted to study their capability in various applications. Due to recirculation or drawing of the penetrated liquid within the surface structure, these surfaces acquire a slippiness property. The conducted investigations showed that these slippery surfaces have great potential for reducing drag forces, whether in a laminar or turbulent flow. In the present work, we first briefly elucidate common drag reduction methods,...
Predicting the environmental economic dispatch problem for reducing waste nonrenewable materials via an innovative constraint multi-objective Chimp Optimization Algorithm
, Article Journal of Cleaner Production ; Volume 365 , 2022 ; 09596526 (ISSN) ; Ren, H ; Habibi, M ; Mohammed, K. J ; Khadimallah, M. A ; Sharif University of Technology
Elsevier Ltd
2022
Abstract
The usage of conventional fossil fuels has aided fast economic growth while also having negative consequences, such as increased global warming and the destruction of the ecosystem. This paper proposes a novel swarm-based metaheuristic method called Chimp Optimization Algorithm (ChOA) to tackle the environmental, economic dispatch issue and reducing the waste nonrenewable materials. In this regard, two objective functions named fuel cost function and emission cost function are proposed. Unique constrained handling also solves the challenge of multi-objective optimization. Standard IEEE 30 bus with six generators and a 10-unit system are used to demonstrate the usefulness of ChOA. The result...
Integrated Green Vendor Managed Inventory Model with Truckload Transportation Mode Selection
, M.Sc. Thesis Sharif University of Technology ; Akhavan Niaki, Taghi (Supervisor)
Abstract
Nowadays, due to various reasons awareness of environment preservation has increased throughout the supply chain. So supply chain owners revise their carbon footprint. Among different methods of reducing, operational decisions (e.g. ordering quantity or transportation method) has less cost and time for observing outcomes. Our main focus is on inventory models that taking account environment considerations especially carbon emissions. Through these models, vendor-managed inventory model for reducing total cost of chain gets more attention than past. The purpose of this work is to develop a two echelon supply chain with multi-item for replacing inventory. This model includes warehouse capacity...
Evaluating one of renewable electricity generation technologies: PEM fuel cells
, Article EPEC 2010 - IEEE Electrical Power and Energy Conference: "Sustainable Energy for an Intelligent Grid", 25 August 2010 through 27 August 2010, Halifax, NS ; 2010 ; 9781424481880 (ISBN) ; Sadeghzadeh, S. M ; Fathi, A. H ; Nasiri, M ; Sharif University of Technology
2010
Abstract
Proton Exchange Membrane (PEM) Fuel Cells are attracting most of the electricity consumers because of high efficiency, zero carbon emissions and high reliability. There are many parameters influencing on this power source's operation. A model of PEM fuel cell will be presented and the sensitivity of the fuel cell's parameters will be analyzed. Multi Parameters Sensitivity Analysis is used next to examine the relative importance of the influential parameters on the PEM fuel cell operation
Fair profit contract for a carrier collaboration framework in a green hub network under soft time-windows: Dual lexicographic max-min approach
, Article Transportation Research Part E: Logistics and Transportation Review ; Volume 91 , 2016 , Pages 129-151 ; 13665545 (ISSN) ; AkhavanNiaki, S. T ; Sharif University of Technology
Elsevier Ltd
2016
Abstract
This paper models a novel and practical bi-objective hub-location problem under a centralized carrier collaboration framework between one holding company and multiple carriers. The holding company first establishes a hub-and-spoke network in order to locate p hubs and to assign the center nodes to the located hubs. Then, it allocates the transportation routes of the hub network to the carriers. In contrast, the carriers should select an appropriate vehicle type to serve the transportation requests in a green hub network. The carriers are also able to meet the transportation requests within a certain time-window based on a soft time-window mechanism. Moreover, aiming to emphasize green...
An approach to targeting cryptocurrency mining loads for energy efficiency enhancement
, Article IET Generation, Transmission and Distribution ; Volume 16, Issue 23 , 2022 , Pages 4775-4790 ; 17518687 (ISSN) ; Azimi Hosseini, K ; Hajipour, E ; Vakilian, M ; Sharif University of Technology
John Wiley and Sons Inc
2022
Abstract
In recent years, the mining of cryptocurrencies such as Bitcoin has attracted much global attention due to the simplicity and high profitability of this business, especially in countries with low electricity rates. The process of cryptocurrency mining using cryptocurrency mining devices requires a significant amount of computing power. This industry, which is increasingly growing in energy and carbon emissions, can cause environmental concerns. Common ways to reduce this amount of energy consumption are to prohibit mining and charge these loads at a higher electricity rate; however, these solution methods are not feasible and applicable in many countries. This paper presents an energy...
Greenhouse gas emission measurement and economic analysis of Iran natural gas fired power plants
, Article Energy Policy ; Volume 60 , 2013 , Pages 200-207 ; 03014215 (ISSN) ; Kiyoumarsioskouei, A ; Asheri, M. H ; Naemi, S ; Shahsavari Alavije, H ; Basirat Tabrizi, H ; Sharif University of Technology
2013
Abstract
This study attempts to examine the natural gas fired power plants in Iran. The required data from natural gas fired power plants were gathered during 2008. The characteristics of thirty two gas turbine power plants and twenty steam power plants have been measured. Their emission factor values were then compared with the standards of Energy Protection Agency, Euro Union and World Bank. Emission factors of gas turbine and steam power plants show that gas turbine power plants have a better performance than steam power plants. For economic analysis, fuel consumption and environmental damages caused by the emitted pollutants are considered as cost functions; and electricity sales revenue are...
Coupled optimization of enhanced gas recovery and carbon dioxide sequestration in natural gas reservoirs: Case study in a real gas field in the south of Iran
, Article International Journal of Greenhouse Gas Control ; Volume 17 , 2013 , Pages 515-522 ; 17505836 (ISSN) ; Jamshidi, S ; Soltanieh, M ; Sharif University of Technology
2013
Abstract
Since the beginning of industrial age the atmospheric concentration of greenhouse gases has been increased significantly due to excessive use of fossil fuels. An effective way for decreasing emission of greenhouse gases is injection of CO2 in geological formations. Moreover, from the reservoir engineering point of view, CO2 injection has been considered as a method of enhancing oil and gas recovery. While using CO2 for enhanced oil recovery (EOR) has been the subject of several studies in the past decades, enhanced gas recovery (EGR) has not been fully studied in the gas reservoirs, mainly because of high recovery factor of gas reservoirs and mixing of the reservoir gas and CO2. In this...
Post-2012 CDM multi-criteria analysis of industries in six Asian countries: Iranian case study
, Article Climate Policy ; Volume 13, Issue 2 , 2013 , Pages 210-239 ; 14693062 (ISSN) ; Abbaspour, M ; Soltanieh, M ; Atabi, F ; Rahmatian, M ; Sharif University of Technology
2013
Abstract
The prospects of the Clean Development Mechanism (CDM) and for carbon income, up to and beyond 2012, in the industrial sectors of Iran and five other Asian countries are investigated. The attractiveness and suitability of each host country, the status of their industrial sectors (based on four post-2012 scenarios), and the post-2012 potential of the CDM (or similar carbon projects) in these sectors are all examined. A multi-criteria analysis of Iran, Saudi Arabia, the UAE, Qatar, China, and India, based on seven sets of criteria (institutional, regulatory, economic, political, social, CDM experience, and energy production/consumption), is conducted, and the post-2012 potential carbon incomes...
What is energy efficiency and emission reduction potential in the Iranian petrochemical industry?
, Article International Journal of Greenhouse Gas Control ; Volume 12 , 2013 , Pages 460-471 ; 17505836 (ISSN) ; Soltanieh, M ; Abbaspour, M ; Atabi, F ; Sharif University of Technology
2013
Abstract
In this study, the prospects of energy efficiency potential, clean development mechanism (CDM) and carbon income up to and beyond 2012 are investigated in the petrochemical industries of Iran as a major oil-producing country. This paper is to address four questions of: (1) the GHGs emission in Iranian petrochemical complexes, (2) the most energy-consuming processes, (3) units with the highest energy efficiency potentials and (4) potentials of CDM or similar carbon projects based on post-2012 scenarios. The petrochemical processes are investigated in two categories of non-polymeric and polymeric productions. Based on capital expenditure, economic saving, simple payback period, CO2 equivalent...
Multi-objective optimization for sustainable development of the power sector: An economic, environmental, and social analysis of Iran
, Article Energy ; Volume 161 , 2018 , Pages 493-507 ; 03605442 (ISSN) ; Aryanpur, V ; Sharif University of Technology
Elsevier Ltd
2018
Abstract
This paper aims to analyze Iran's long-term power sector development from economic, environmental, social, and sustainable perspectives. For this purpose, a linear programming model is developed, which includes three objective functions: minimization of costs, minimization of CO2 emissions, and maximization of created jobs. To provide a sustainable plan, analytical hierarchy process is employed to allocate expert-based weights to the objective functions. Moreover, to support the decision-makers, Pareto-optimal alternatives are explored by varying the weights of objectives. The multi-objective model is solved by applying a weighted method based on fuzzy membership functions. The results show...
Strategies for utilizing alternative fuels by Iranian passenger cars
, Article International Journal of Environmental Science and Technology ; Volume 3, Issue 1 , 2006 , Pages 59-68 ; 17351472 (ISSN) ; Vaziri, M ; Azadani, A. N ; Sharif University of Technology
CEERS
2006
Abstract
The current paper is an attempt to find a sustainable fuel strategy for passenger cars in Iran. Currently, most of Iran's passenger cars consume gasoline, a non-renewable fossil fuel. This fuel has well-known environmental impacts, including various kinds of pollutions, as well as the threat of quick running out. These general negative characteristics of gasoline are amplified by the high consumption rate of Iran's transportation sector, (e.g. about three times more than that of UK). The objective of this paper is firstly selecting possible alternative fuels for Iran's transportation sector, and then proposing the percent of cars consuming these alternative fuels (along with gasoline). The...
Building circularity as a measure of sustainability in the old and modern architecture: A case study of architecture development in the hot and dry climate
, Article Energy and Buildings ; Volume 275 , 2022 ; 03787788 (ISSN) ; Golabchi, M ; Bararzadeh Ledari, M ; Sharif University of Technology
Elsevier Ltd
2022
Abstract
Nowadays, the construction industry has turned to the consumption of large amounts of natural resources in line with global population growth, which has led to the shortage of resources, and consequently increases in the construction debris; therefore, the present article has studied the positive and negative points of the architectural development process. The results have indicated that being compared to the former architecture; the development of architecture has reduced energy consumption by 78%. Hence, the scarcity of virgin resources and consequently the increase of environmental effects such as Global Warming Potential (GWP) have been measured based on the Life Cycle Assessment (LCA)....