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Total 23 records

    Development of a Model for Energy, Environmental and Technical Evaluation in Iron and Steel Industry

    , M.Sc. Thesis Sharif University of Technology Sharafi, Masoud (Author) ; Saboohi, Yadollah (Supervisor)
    Abstract
    The iron and steel industry has faced several challenges during the recent years. There has always been an aspiration towards higher economic profitability for the system. During the mid 1970s and 1980s the energy crises caused a dramatic rise in energy costs, which led to an increased awareness in energy conservation. In recent years, climate change issues have become more important for the industry. The operating practices for an industrial system are often affected by external restrictions concerning the economical, energy and environmental efficiency of the system. There are a large number of ways to increase the system efficiency, e.g. installation of new process equipment, and practice... 

    Sustainability Assessment of Embankment Construction

    , M.Sc. Thesis Sharif University of Technology Iravani, Pooya (Author) ; Alvanchi, Amin (Supervisor)
    Abstract
    Damming projects always have been important while construction, operation and even demolition due to their major effects on society, environment and economy. Although researchers have focused on one or a few phases of construction projects to develop sustainable infrastructures, the research community has to consider long term effects of developments too. There are a variety of such effects that ignoring them will cause construction of not convenient infrastructures i.e. air pollution and over-consumption of energy resources while construction, operation and demolition. Therefore, it is suggested to consider life cycle assessments to include all bad effects in all phases of a project. Dams... 

    Emission assessment of alternative dam structure types, a novel approach to consider in new dam projects

    , Article Construction Innovation ; 2020 Alvanchi, A ; Bajalan, Z ; Iravani, P ; Sharif University of Technology
    Emerald Group Publishing Ltd  2020
    Abstract
    Purpose: Dams require high-volume of construction materials and operations over the life cycle. This paper aims to select a proper type of dam structure that can significantly contribute to the sustainability of dam projects. Design/methodology/approach: This research proposes a complementary fuel consumption and carbon dioxide (CO2) emission assessment method for the alternate dam structure types to assist decision-makers in selecting sustainable choices. Related equations are developed for two common earthen and rock-fill dam structures types in Iran. These equations are then successfully applied to two real dam project cases where the significance of the achieved results are assessed and... 

    Feasibility Study of Using Molten Carbonate Fuel Cell for CO2 Capture from Exhaust Gases of Internal Combustion Engines

    , M.Sc. Thesis Sharif University of Technology Habibzade, Samane (Author) ; Roshandel, Ramin (Supervisor) ; Shaygan, Jalaloddin (Co-Advisor)
    Abstract
    According to, increasing use of energy in the world, issues such as increasing reenhouse gas’ emission, rising temperature on planet earth and air pollution have appeared Carbon dioxide is a major greenhouse gas that has a significant impact on increasing the temperature of earth. In recent years, attentions to carbon dioxide capturring and sequestration technologies have been increased. In this project molten carbonate fuel cell which is used as a new method for separating carbon dioxide from gaseous compounds of combustion process, is discussed. The aim of the project is to, investigate technical and
    economic feasibility of using molten carbonate fuel cell for separating carbon... 

    A Closed-loop Green Supply Chain Network Design Using Robust Optimization

    , M.Sc. Thesis Sharif University of Technology Jafarnejad, Nasim (Author) ; Fereydoon, Kianfar (Supervisor)
    Abstract
    Network design is one of the major strategic decisions of a supply chain which leads to the whole sustainability of the chain. Besides, due to an increase in carbon dioxide emissions and its harmful effects, recently there has been an growing interest in green supply chain network design. In this thesis, a mixed integer linear programming is developed to formulate a closed-loop supply chain with forward and reverse logistics. Moreover, social cost rate of carbon dioxide is used to consider environmental impact. Considering uncertainty in closed-loop supply chains is crucial. To do so, three robust optimization methods including Soyster, Ben-tal and Nemirovski and Bertsimas and Sim approaches... 

    Development of Improved Conversion Energy System based on High Temperature Fuel Cells

    , M.Sc. Thesis Sharif University of Technology Golzar, Farzin (Author) ; Roshandel, Ramin (Supervisor)
    Abstract
    Sustainable development is the basic aim of energy researchers. But common conversion technologies with respect to efficiency, fuel type and pollution of them, need basic operating improvement to reach sustainable development. Aim of this project is investigation of high temperature fuel cells as basic energy convertor. To improve performance of fuel cell system, four integration systemsare modeled and proposed. Using integrated systems in combined cooling, heat and power is another way of improving performance of systems, that is done in this project.
    To improve system performance, the optimum operating values of these parameters is determined. In order to use four proposed system in... 

    Optimal electricity supply system under iranian framework limitations to meet its emission pledge under the Paris climate agreement

    , Article International Journal of Sustainable Energy Planning and Management ; Volume 30 , 2021 , Pages 75-96 ; 22462929 (ISSN) Abbasi Godarzi, A ; Maleki, A ; Sharif University of Technology
    Aalborg University press  2021
    Abstract
    As part of its Paris Agreement commitment, Iran pledged to decrease 4 % of its carbon dioxide (CO2) emissions from 2020 to 2030. About 29% of total emission in Iran belongs to electricity supply while energy consumption in other sectors (transport, household, and industry) have a lower share in CO2 emission. The main concern here is finding the optimal mix of power plants in the electricity supply system that should be deployed to meet Iran’s mentioned respective targets and considering simultaneously interests of consumers and producers in this energy system. So, we developed a non-linear mathematical programming model for Iran’s electricity system to address this concern with changing... 

    Emission assessment of alternative dam structure types, a novel approach to consider in new dam projects

    , Article Construction Innovation ; Volume 21, Issue 2 , 2021 , Pages 203-217 ; 14714175 (ISSN) Alvanchi, A ; Bajalan, Z ; Iravani, P ; Sharif University of Technology
    Emerald Group Holdings Ltd  2021
    Abstract
    Purpose: Dams require high-volume of construction materials and operations over the life cycle. This paper aims to select a proper type of dam structure that can significantly contribute to the sustainability of dam projects. Design/methodology/approach: This research proposes a complementary fuel consumption and carbon dioxide (CO2) emission assessment method for the alternate dam structure types to assist decision-makers in selecting sustainable choices. Related equations are developed for two common earthen and rock-fill dam structures types in Iran. These equations are then successfully applied to two real dam project cases where the significance of the achieved results are assessed and... 

    Modeling carbon dioxide emission of countries in southeast of Asia by applying artificial neural network

    , Article International Journal of Low-Carbon Technologies ; Volume 17 , 2022 , Pages 321-326 ; 17481317 (ISSN) Komeili Birjandi, A ; Fahim Alavi, M ; Salem, M ; Assad, M. E. H ; Prabaharan, N ; Sharif University of Technology
    Oxford University Press  2022
    Abstract
    Energy and economy play a substantial role in environmental issues such as the emission of greenhouse gases. CO2 is one of the greenhouses that is hugely produced in industrial processes and other human being activities. The major share of CO2 emission is related to the energy-related activities. As a result, modeling the amount of produced CO2 by utilization of different energy sources must be considered. Moreover, by considering economic indicators such as gross domestic product, the accuracy of the model could be improved. In the present work, artificial neural network (ANN) with two transfer functions including normalized radial basis and tansig is used to model CO2 production of... 

    Design and Optimization of Carbon Capture System from Exhaust Gases in the Process Industries

    , M.Sc. Thesis Sharif University of Technology Farshi Taghavi, Mahdis (Author) ; Rashtchian, Davood (Supervisor) ; Seif, Shayan (Co-Supervisor)
    Abstract
    Carbon dioxide is one of the main geenhouse gases emitted from factories as well as transportation vehicles that adversely affect the atmosphere and cause global warming. Among the proposed solutions to reduce carbon dioxide in the atmosphere, carbon dioxide separation would be the most viable medium-term approach. However, the high cost of carbon dioxide separation prevents the development of carbon dioxide absorption technologies. Therefore, it seems that integrating separation and production processes is the most efficient way to save energy and reduce carbon emissions. This method decrease a high proportion of the energy consumption in upstream operations (carbon dioxide removal,... 

    Risk Assessment in Carbon Dioxide Capture,Transport and Storage

    , M.Sc. Thesis Sharif University of Technology Rooeintan, Mohammad Javad (Author) ; Rashtchian, Davood (Supervisor)
    Abstract
    The set processes of carbon dioxide capture, transfer and storage in underground water source, called CCS. Carbon dioxide capture and storage is a process consisting of the separation of carbon dioxide from industrial and energy-related sources, transport to a storage location and long-term isolation from the atmosphere. Carbon dioxide is the most important greenhouse gases, which causes global average temperature rise and controller institutions want the companies and refineries to follow this issue.Under normal circumstances, there is minor amounts of carbon dioxide gas in the air which its concentration is close to 0.04 percent. The concentration of between 7 to 10 percent is a serious... 

    Investigation of Electrocatalytic Activity of Metal-based Nanocomposites in the Reaction of Carbon Dioxide Reduction

    , M.Sc. Thesis Sharif University of Technology Hatami, Homayoun (Author) ; Bastani, Darioush (Supervisor) ; Taherinia, Davood (Supervisor)
    Abstract
    Emissions of carbon dioxide (CO2) from fossil fuels are a potential issue for the global climate. One way to meet this challenge is to electrochemically convert CO2 molecules to reduced carbon species such as formates, alcohols, hydrocarbons, etc., which is a difficult process due to the poor kinetics of CO2 reduction. Therefore, the use of catalysts, while preventing undesirable side reactions, can also play an important role in reducing CO2. In this study, a two-step synthesis of CuS (1, 5, 12, 24 hr) @ Cu-MOF has been reported as an advanced electrocatalyst for CO2 reduction in neutral pH environments. Bismuth has been used to improve the electrocatalytic properties of the samples. Bi-CuS... 

    When Renewable Energy R&D and Import will Support Tackling the Climate Change? Regional Analysis for OECD Countries

    , M.Sc. Thesis Sharif University of Technology Moqadassi, Zahra (Author) ; Miremadi, Iman (Supervisor) ; Khajehpour, Hossein (Supervisor)
    Abstract
    One of the actions taken to mitigate the climate change is research, development and demonstration (RD&D) investments in renewable energy technology. In addition to domestic R&D spending, the importation of foreign technologies, as a main channel of technology transfer, is another option to obtain renewable energy technologies in order to achieve climate objectives. In this study, a panel dataset of 28 OECD member countries from 2011 to 2020 is analysed, using the OLS, fixed-effects, and two-system system GMM methods, to assess the impacts of public spending on renewable energy RD&D and the import of renewable energy technologies on the energy-related CO2 emissions. To fully capture the the... 

    Superstructure Optimization of CO2 Capture, transport, and Utilization in Industrial Symbiosis Networks

    , M.Sc. Thesis Sharif University of Technology Shah Mohammadi, Amir (Author) ; Roshandel, Ramin (Supervisor)
    Abstract
    CO2 capture and utilization (CCU) is a promising approach to reduce and control emissions from the industry and energy sector, while also creating new jobs and value-added products. However, one of the main barriers to the widespread adoption of CCU is the high investment and operating costs, which limit its implementation to mostly government-supported research projects. To overcome this barrier, structural optimization and identification of optimal routes and formation of industrial symbiosis networks are needed. In this research, we developed a comprehensive superstructure that includes sources and sinks (in a case study), CO2 capture and separation material and technology combinations... 

    The Impact of Digital Technologies on CO2 Emissions: A Comparison between Developed and Developing Countries

    , M.Sc. Thesis Sharif University of Technology Mahmoudi, Sanaz (Author) ; Miremadi, Iman (Supervisor)
    Abstract
    The importance and vitality of focusing on sustainable transition and reducing carbon dioxide emissions are clear to everyone today. However, until recently, the impact of digitization as a major global trend involving the application of digital technologies to change and optimize various elements of business, society, and daily life on the environment and carbon dioxide emissions has been underestimated. Despite the growing amount of research in this field, according to current studies, the connection between digitization and carbon dioxide emissions is not clear. To achieve environmental and sustainable development goals, fossil fuel consumption and greenhouse gas (GHG) emissions must be... 

    Reactive absorption in packed bed columns in the presence of magnetic nanoparticles and magnetic field: Modeling and simulation

    , Article Journal of Industrial and Engineering Chemistry ; Volume 45 , 2017 , Pages 131-144 ; 1226086X (ISSN) Rahimi, M ; Molaei Dehkordi, A ; Sharif University of Technology
    Korean Society of Industrial Engineering Chemistry  2017
    Abstract
    In this article, the influences of ferrofluid and magnetic field on the reactive absorption in packed-bed contactors have been investigated. Because of importance of carbon dioxide emission as a global concern, absorption of carbon dioxide was chosen to investigate these effects. In this regard, multitube approach was applied to model the contactor. The simulation results were validated against experimental data reported in the literature in the absence of nanoparticles and magnetic field and good agreement was obtained. Moreover, influences of various operating conditions on the contactor performance were investigated. It was found that for 3.4 vol.% of magnetic nanoparticles (MNPs), the... 

    A design procedure for the assessment of carbon capturing and utilization of flue gas from power plant using experimental data

    , Article Chemical Engineering Research and Design ; 2017 ; 02638762 (ISSN) Rostami Dehjalali, F ; Avami, A ; Sharif University of Technology
    Institution of Chemical Engineers  2017
    Abstract
    The high dependence of the atmospheric carbon dioxide emissions on fossil fuels has led it to increment. Process design along with the economic aspects, improves the technology diffusion of the carbon capturing. In the pressure swing adsorption as a promising carbon capturing technology, increasing the pressure leads to more adsorbed amount of carbon dioxide and energy consumption of compressor, which is a source for carbon dioxide emission. Experimental data shows that for pressures between 3 to 5bar, the avoided CO2 is in maximum rate. The economic analysis reveals that the pressure of 3bar is appropriate. Also, the utilization of CO2 in the aerogel production, as a nano-based thermal... 

    Economic and environmental assessment of a solar-assisted ground source heat pump system in a heating-dominated climate

    , Article International Journal of Environmental Science and Technology ; 2018 , Pages 1-8 ; 17351472 (ISSN) Biglarian, H ; Saidi, M. H ; Abbaspour, M ; Sharif University of Technology
    Center for Environmental and Energy Research and Studies  2018
    Abstract
    In recent years, increasing attention has been paid to the use of renewable energy sources in building sector. The ground source heat pumps are a promising alternative for heating and cooling applications. Despite the high coefficients of performance and significant environmental benefits, their performance may deteriorate over the long-term operation if the annual ground loads are not well balanced. An appropriate solution is the use of hybrid ground source heat pump system through which some portion of the thermal loads can be offset by supplemental components. The aim of this study is to assess the feasibility of a solar-assisted ground source heat pump system for heating a detached house... 

    A design procedure for the assessment of carbon capturing and utilization of flue gas from power plant using experimental data

    , Article Chemical Engineering Research and Design ; Volume 131 , 2018 , Pages 393-405 ; 02638762 (ISSN) Rostami Dehjalali, F ; Avami, A ; Sharif University of Technology
    Institution of Chemical Engineers  2018
    Abstract
    The high dependence of the atmospheric carbon dioxide emissions on fossil fuels has led it to increment. Process design along with the economic aspects, improves the technology diffusion of the carbon capturing. In the pressure swing adsorption as a promising carbon capturing technology, increasing the pressure leads to more adsorbed amount of carbon dioxide and energy consumption of compressor, which is a source for carbon dioxide emission. Experimental data shows that for pressures between 3 to 5 bar, the avoided CO2 is in maximum rate. The economic analysis reveals that the pressure of 3 bar is appropriate. Also, the utilization of CO2 in the aerogel production, as a nano-based thermal... 

    Sustainable usage of waste materials as stabilizer in rammed earth structures

    , Article Journal of Cleaner Production ; Volume 277 , December , 2020 Kosarimovahhed, M ; Toufigh, V ; Sharif University of Technology
    Elsevier Ltd  2020
    Abstract
    Rammed earth (RE) is an eco-friendly building material and has been capturing special attention among researchers. Many of the recently studied RE additives are extremely resource- and energy-consuming. On the other hand, the usage of fly ash (FA), which is a sustainable replacement for cement, has been scarcely investigated in RE construction. In this paper, an experimental investigation was performed on the physical and mechanical properties of RE materials stabilized with the combination of cement and alkali-activated FA. This scrutiny consists of density measurements, pulse velocity tests, unconfined compression tests, and direct shear tests. Additionally, the carbon dioxide emission and...