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    Assessing the EROI of Oil Production Through Life Cycle Analysis Approach

    , M.Sc. Thesis Sharif University of Technology Salehi, Mohammad (Author) ; Sabouhi, Yadollah (Supervisor)
    Abstract
    EROI is an indicator to analyse energy productivity of a resource. EROI of Sirri operation unit is assessed in two different levels. Direct energy consumption and total associated gas are used in first and second level respectively. Two important aspects of the present research are considering environmental externalities and estimation of EROI related to outputs of multi-production systems. Also a model is introduced to identify relationship between oil price and EROI. Energy Abatement Cost is used to include environmental externalities to EROI. Thre benchmarks – price, energy and exergy content and exergy cost – are considered as a basis to for estimating EROI. Using LCA for taking into... 

    Model for Optimal design of Energy Recovery System in Cement Plant

    , M.Sc. Thesis Sharif University of Technology Ehsani, Mahdi (Author) ; Sabouhi, Yadollah (Supervisor)
    Abstract
    The purpose of the present study is to develope an optimal model for analysis the impact of implementing a heat recovery system in a cement production line. For this goal, the energy reference system of a cement plant has been prepared, mass and energy balance sheets of the cement factory with dry production method, the characteristics of two high-energy streams have been identified in order to estimate the potential of heat recovery. Regarding the temperature range of the main hot streams, an appropriate cycle for generating electrical power from the lost heat, the Rankine cycle with organic fluid (ORC) has been formulated. The main question in the present project was how to relate the... 

    Sustainable Development Model of Energy Sector Based on Exergy Flow Concept

    , Ph.D. Dissertation Sharif University of Technology Khajehpour, Hossein (Author) ; Sabouhi, Yadollah (Supervisor)
    Abstract
    Sustainable development of the energy sector, as a resource-consuming sector with high environmental emissions, is essential. Especially in energy-intensive countries such as Iran with a sensitive environment, the sustainability considerations are more critical. The sustainability may be achieved when all pillars (economic, social, and environmental) are considered in a balanced manner. Previous economic experiences show the incapability of the market view in proper consideration of the ecosystem assets. Therefore, and in contrast to the economic view, in the physical approaches the limited capacity of the cosystem bounds the economic activities for meeting social welfare. In this view, the... 

    “Environmental Modelling of Oil and Gas Upstream”

    , M.Sc. Thesis Sharif University of Technology Khajehpour, Hossein (Author) ; Sabouhi, Yadollah (Supervisor)
    Abstract
    Oil and gas upstream, is one of the major parts of the energy chain in the world. Processes of production, transportation, processing and conversion of energy carriers are the main parts of this sector. Process units of oil and gas upstream industry are some of most local and global pollution resources in the world. In this research, the consideration of the pollutions from the production, processing and conversion of fossil fuels sector and the optimization of the management choices of each pollutant is subjected. Consideration of the pollutants related to the upstream sector, pollution control and management choices, cost accounting of the environmental impacts, the methods of accounting... 

    Game Theory Approach in Decisional Process of Multi-Carrier Energy Systems in the Context of Energy Hub

    , M.Sc. Thesis Sharif University of Technology Sobhani, Omid (Author) ; Sabouhi, Yadollah (Supervisor) ; Rajabi Ghahnavieh, Abbas (Co-Advisor)
    Abstract
    By increasing the penetration of distributed generation (DG) technologies such as photovoltaiec, μCHP etc, power generation system is moving from a centralized network to a distributed scheme with different generation units at lower level of voltage.This trend will provide the opportunity for cosumers to make decision when and which source of energy to use, due to the owner’s objectives. Here, to investigate these aspects, we use the energy hub framework, considering different energy carrier networks, DGs and storage devices. In this thesis, we model and simulate an energy system containing three interconnected energy hubs, which serve as interface between suppliers and consummers. In an... 

    Reliability modeling and availability analysis of combined cycle power plants

    , Article International Journal of Electrical Power and Energy Systems ; Volume 79 , 2016 , Pages 108-119 ; 01420615 (ISSN) Sabouhi, H ; Abbaspour, A ; Fotuhi Firuzabad, M ; Dehghanian, P ; Sharif University of Technology
    Elsevier Ltd  2016
    Abstract
    Power plant successful operation is always a function of its constituent sub-systems and components. Due to the current financial constraints in power industry, power plant operators are continuously facing a wide range of challenges when dealing with maintenance scheduling and asset management practices of the plant sub-systems. Knowledge on the roles and criticality of the constituent components on the plant overall performance will help in establishing the plans for its smooth, safe, and economic operation. To ensure making the techno-economical decisions on the maintenance of power plant equipment, this paper focuses on the reliability modeling of the combined cycle power plants (CCPP).... 

    A novel matrix based systematic approach for vulnerability assessment

    , Article COMPEL - The International Journal for Computation and Mathematics in Electrical and Electronic Engineering ; 2020 Sabouhi, H ; Doroudi, A ; Fotuhi Firuzabad, M ; Bashiri, M ; Sharif University of Technology
    Emerald Group Holdings Ltd  2020
    Abstract
    Purpose: This paper aims to propose a novel matrix-based systematic approach for vulnerability assessment. Design/methodology/approach: The proposed method consists of two major steps. First, the power network is modeled as a topological combination of edges (transmission lines, transformers, etc.) and nodes (buses, substations, etc.). The second step is to use an axiomatic design-based index for topology analysis. This index is based on the systematic counting of possible routes from the start (generators) to destination (loads), considering load importance, before and after a disruption. Findings: The effectiveness of the proposed method is demonstrated through an illustrative example and... 

    Electrical power system resilience assessment: a comprehensive approach

    , Article IEEE Systems Journal ; Volume 14, Issue 2 , 2020 , Pages 2643-2652 Sabouhi, H ; Doroudi, A ; Fotuhi Firuzabad, M ; Bashiri, M ; Sharif University of Technology
    Institute of Electrical and Electronics Engineers Inc  2020
    Abstract
    Extreme weather events such as earthquake and hurricane have disastrous consequences on power systems. Due to the inherent nature of these events, as high-impact low-probability (HILP) events, selection of an appropriate method that can provide the effects of weather conditions on the power system behavior still remains a significant challenge. Resilience is a new concept that focuses on mitigating the destructive effects of such disastrous events on power systems. This article provides a fundamental framework for quantifying and modeling of power systems resilience, with focus on high wind incidence. The algorithm composes of four steps. In the first step, the prerequisites of the analysis... 

    Hybrid AC/DC microgrids flexible reliability index by using the axiomatic design concept

    , Article IET Generation, Transmission and Distribution ; Volume 14, Issue 23 , 2020 , Pages 5456-5462 Sabouhi, H ; Doroudi, A ; Fotuhi Firuzabad, M ; Bashiri, M ; Sharif University of Technology
    Institution of Engineering and Technology  2020
    Abstract
    With the capacity increase of large-scale DC renewable energy and DC loads, the reliability issues of hybrid AC/DC networks become increasingly prominent. On the other hand, a modern distribution network should also deliver power to individual customers based on their priority levels and the traditional reliability indices are not suitable for modern networks. Flexible reliability (FR) is a new concept that considers the loads' importance in the reliability evaluation of distribution grids. In this study, a novel comprehensive FR index is introduced for hybrid AC/DC networks. To determine the proposed index, power networks are modelled as a topological combination of edges and nodes. An... 

    Electricity distribution grids resilience enhancement by network reconfiguration

    , Article International Transactions on Electrical Energy Systems ; Volume 31, Issue 11 , 2021 ; 20507038 (ISSN) Sabouhi, H ; Doroudi, A ; Fotuhi Firuzabad, M ; Bashiri, M ; Sharif University of Technology
    John Wiley and Sons Ltd  2021
    Abstract
    Electric power systems try to maximize resilience by various enhancement strategies as preventive and corrective actions against extreme weather events. This paper presents an operational network reconfiguration strategy during a high wind event to strengthen the resiliency of distribution networks. In the proposed resilience enhancement strategy, a bi-level optimization problem is formulated with two conflicting objectives (i) maximizing grid resilience and (ii) realize the primary objective by a minimum number of out-of-service lines (OSLs) switching operations. Furthermore, the algorithm considers the priority of loads, which is an important characteristic of modern distribution grids.... 

    A novel matrix based systematic approach for vulnerability assessment

    , Article COMPEL - The International Journal for Computation and Mathematics in Electrical and Electronic Engineering ; Volume 40, Issue 1 , 2021 , Pages 1-17 ; 03321649 (ISSN) Sabouhi, H ; Doroudi, A ; Fotuhi Firuzabad, M ; Bashiri, M ; Sharif University of Technology
    Emerald Group Holdings Ltd  2021
    Abstract
    Purpose: This paper aims to propose a novel matrix-based systematic approach for vulnerability assessment. Design/methodology/approach: The proposed method consists of two major steps. First, the power network is modeled as a topological combination of edges (transmission lines, transformers, etc.) and nodes (buses, substations, etc.). The second step is to use an axiomatic design-based index for topology analysis. This index is based on the systematic counting of possible routes from the start (generators) to destination (loads), considering load importance, before and after a disruption. Findings: The effectiveness of the proposed method is demonstrated through an illustrative example and... 

    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... 

    Development of Optimal Integrated and Intensive Model of Energy Processing and Conversion

    , Ph.D. Dissertation Sharif University of Technology Avami, Akram (Author) ; Saboohi, Yadollah (Supervisor)
    Abstract
    In a single chemical plant, the operation of each unit operation is not independent of each other. In the other hand, the main operations are performed in reactors following by several separation steps including distillation and purification units. The total energy requirements are sullied by the heat exchanger networks. The performance of these systems is improved by integration and intensification of the reactor and distillation column in a single unit. The main objective of the present work is to provide an effective design approach to intensify the reactor and distillation column. In a reactive distillation column, the reaction and separation is done in a single unit. Increasing... 

    Optimal Energy and Exergy Model of Waste Heat Recovery Systems in Cement Industry

    , M.Sc. Thesis Sharif University of Technology Ghadaksaz, Hesam (Author) ; Saboohi, Yadollah (Supervisor)
    Abstract
    Nowadays, cement has become the cornerstone of any modern society especially in developing countries. But, cement production process is highly energy intensive and emits significant volumes of carbon dioxide.According to the latest reports, Iranian cement industry accounts for about 14.5% of total industrial sector’s energy consumption and this indicates the importance of sustainable development for cement industry concerning national energy and environmental constraints.Based on these facts, current study assesses the technology improvement opportunities particularly waste heat recovery power generation (WHRPG) technology for Iranian cement industry. This needs identifying optimized mass... 

    Smulation of Hydrogen Production by the Process of Thermal Decomposition of Methane

    , M.Sc. Thesis Sharif University of Technology Parishan, Samira (Author) ; Saboohi, Yadollah (Supervisor)
    Abstract
    Different disadvantages associated with using fossil fuels as the main energy source including crisis of wells’ depletion and serious environmental problems, causing by the emission of large quantities of greenhouse gases (GHG), especially carbon dioxide (CO2), has increased attention to replacing them with renewable and clean fuels such as wind, solar, and geothermal energy sources. Hydrogen, as a clean energy carrier, is one of the best fuels in terms of the environment and cost. So, it is recently receiving increasing attention and it may one day replace fossil fuels for various applications such as in automobiles and power stations. The main subject of this thesis was surveying the... 

    Development of a Model for Analysis of Multinational Integrated Energy System of ECO Region

    , M.Sc. Thesis Sharif University of Technology Miremadi, Iman (Author) ; Saboohi, Yadollah (Supervisor)
    Abstract
    ECO region is perched near to three main energy sources, namely, Russia, Persian Gulf, and Caspian Sea. In this regards, the ECO members consider their co-operation in three directions, namely Trade, Energy, and Transportation, as their main priority. The main strategy of the ECO organization in energy issue is twofold: 1) to speed-up the optimum usage of energy sources with minimal cost and, 2) enables access to each other's markets and also to the international market. In fact, the energy producer countries as well as the energy transferor countries, both have a close role in the process of production and proffering. The increased dimensions and complexity of inter-related energy system... 

    Optimization of Heat Recovery and Water Capture System from Boiler Flue Gas

    , M.Sc. Thesis Sharif University of Technology Armin, Bahman (Author) ; Saboohi, Yadollah (Supervisor)
    Abstract
    Thermal energy and water in flue gases varies with the type of fuel and thermal conversion system. Flue gas temperature is maintained in the range of 140 (℃) to 200 (℃) and it is subject to the sulfur content of the fuel. Vapor content of the flue gas is in the range of 10%_20% of volumetric flow. Considerable part of vapor may be recovered which can be used as cooling water make up. There are various means and methods for water capture and heat recovery which includes shell-tube heat exchanger among others. Selection of appropriate material and heat exchanger is conditioned by corrosion, temperature of flue gas and it’s economic feasibility. Identification of an optimal design of... 

    Development and Application of a Model for Assessment of Energy Sector in Middle East and the Role of Iran

    , M.Sc. Thesis Sharif University of Technology Moayed, Mojtaba (Author) ; Saboohi, Yadollah (Supervisor)
    Abstract
    The Middle-East with its enormous fossil fuel resources is considered as one of the most important regions with regard to the future world energy outlook. The region produced more than 32% and 16% of the world oil and gas, respectively, in 2012 and contains more than 48% of proven oil and 43% of proven gas reserves in the world and with 78 years of reserves-to-production ratio (RPR or R/P) has a key role in global energy provision. However, the energy issues in the region are intensifying. For instance, the fossil resources are pushed to the second half of their life time due to massive exploitation which results in change in production processes and raises the need for energy investment, on... 

    Developing a Model for Design of Small Hydro Power Systems and It’s Validation with Empirical Results

    , M.Sc. Thesis Sharif University of Technology Haghi, Ehsan (Author) ; Saboohi, Yadollah (Supervisor)
    Abstract
    Hydro power is a clean energy resource which has numerous advantages over other renewable energy systems including competitiveness with fossil fuel systems, high reliability, considerable potential, and availability of technology. These advantages have drawn attention to hydropower systems. Small Hydro Power (SHP) systems can be used for supplying the demand of rural and remote areas where electricity network rarely exists. SHP may also provide an investment opportunity. Comprehensive analysis of design features and operation of SHP and management of risks involved requires development and application of reliable analytical tools. The present research aims at developing a model for optimal... 

    Development of Energy Supply Model under Uncertainty

    , Ph.D. Dissertation Sharif University of Technology Mirkhani, Shahin (Author) ; Saboohi, Yadollah (Supervisor)
    Abstract
    Energy supply system model (ESM) is used as an analytical tool for policy making and optimizing the allocation of energy resources, selecting the best combination of energy carriers and technologies, and also determining required investments for development and operation of energy supply system, in order to meet the useful demand of energy. Although the modeled process in this Bottom-Up mathematical tool has deterministic characteristics, but evolution of exogenous parameters for energy sector have uncertainty which may impact on results of energy model. Limitations of applied methods for application of deterministic energy models under uncertain conditions result that all uncertain...