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energy-system
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Multi objective receding horizon optimization for optimal scheduling of hybrid renewable energy system
, Article Energy and Buildings ; Volume 150 , 2017 , Pages 583-597 ; 03787788 (ISSN) ; Roshandel, R ; Sharif University of Technology
Abstract
In this paper, a methodology for energy management system (EMS) based on the multi-objective receding horizon optimization (MO-RHO) is presented to find the optimal scheduling of hybrid renewable energy system (HRES). The proposed HRES which is experimentally installed in educational building comprising the PV panels, wind turbine, battery bank and diesel generator as the backup system. The data acquisition system provides input profiles for receding horizon optimizer. A mixed-integer convex programing technique is used to achieve the optimal operation regarding to two conflicting operation objectives including diesel fuel cost and battery wear cost. The Pareto frontiers are presented to...
Optimal design of renewable integrated heat and electricity supply systems with genetic algorithm: household application in Iran
, Article International Journal of Environmental Science and Technology ; Volume 17, Issue 4 , 2020 , Pages 2185-2196 ; Saboohi, Y ; Sharif University of Technology
Springer
2020
Abstract
The objective of the present study is the development of an optimization model for identifying the best configuration of renewable-based integrated energy systems. The system includes a combination of renewable energy systems such as wind, solar, hydropower and hydrogen production, storage facilities and conventional fossil-fuel generators. The developed tool consists of various modules where water heating assumes the utilization of waste energy as an option. Furthermore, the application, which is demonstrated for a case study in Tehran, has been considered. The power exchange with the distribution network and injection of hydrogen produced from excess renewable sources into gas network are...
Model for Planning Flow of Knowledge to Optimize Energy and the Environment
, M.Sc. Thesis Sharif University of Technology ; Saboohi, Yadollah (Supervisor)
Abstract
The purpose of this study is to investigate and analyse the technological transition of a new clean energy technology in the market. The agent-based modeling is used in national innovation chain to describe knowledge spillover between main actors in innovation procedure in order to attain renewable energy technology (RET) from basic research to commercial stage. Government’s expenditure on training human resource and R&D activities is modeled as a tool to analyse the development of innovation chain in order to increase diffusion rate of the new technology. Application of the knowledge flow model is demonstrated through analysis of introduction of solar PV in the energy system of Iran and...
Simulation and Optimal Control of Electric Arc Furnace
, Ph.D. Dissertation Sharif University of Technology ; Saboohi, Yadollah (Supervisor)
Abstract
The study presents a comprehensive electric arc furnace model for simulation and control application to predict chemical processes, heat and mass transfer. The model consists of arc module, chemical – slag module and heat transfer sector to observe fundamental phenomena affecting on energy consumption. Two modules act independently of each other and the two module calculations apply in the heat transfer sector. Arc module predicts the amount of energy dissipated from the arcs using arc currents and arc lengths; chemical and slag module calculates chemical energy, changes of elements/compounds, slag height and slag quality; while the heat-transfer sector uses calculations of the other two...
Evaluation of Impact of New TransportationTechnologies on Development of Energy System
, M.Sc. Thesis Sharif University of Technology ; Saboohi, Yadollah (Supervisor)
Abstract
The Security of oil and gas supply and climate change are the most important challenges facing human today. Transportation sector is an important energy consumer sector. The share of transport sector in greenhouse gas emission, which steams from usage of hydro carbons, is considerable. Energy consumption and emission of pollutants in transport sector depend on the efficiency and technical features of transport technologies. Therefore, diffusion of new technologies in to transport sector has significant impact on energy usage and emission of pollutants in energy system. The aim of this project is to evaluate main features of life cycle of transportation technologies. Therefore, we developed a...
Simultaneous Production of Electricity , Hydrogen& Heat by Photovoltaic System in a Residential House
, M.Sc. Thesis Sharif University of Technology ; Saboohi, Yadollah (Supervisor) ; Roshandel, Ramin (Co-Advisor)
Abstract
Trends of energy consumption and global warming, air pollution, Greenhouse gas emission, depletion of fossil energy resourcec and the rise in costs of fossil resources, indicate that renewable energies are reliable alternative in energy supply systems. The purpose of the project is to investigate the contribution of renewable energy to meeting energy demand of housing units. Household energy system consists of various parts which do intreract with each other. Total household energy system may be represented with the help of reference energy system in order to consider the effect of changes in one part on the other sections. In this regard, the reference diagram of household energy supply...
Developing a Model for Optimal Design of Hybrid Energy Systems: Based on Sustainability and Environmental Criteria
, Ph.D. Dissertation Sharif University of Technology ; Saboohi, Yadollah (Supervisor)
Abstract
The objective of the present study is the development of an optimization model to identify the best configuration of renewable-based integrated energy systems. The system includes a combination of renewable energy systems such as wind, solar, hydropower and hydrogen production, storage facilities, and conventional fossil-fuel generators. The developed tool consists of various modules where water-heating assumes the utilization of waste energy as an option. Furthermore, the application, which is demonstrated for a case study in Tehran has been considered. The power exchange with the distribution network and injection of hydrogen produced from excess renewable sources into gas network are...
Developing a New Model to Estimate Flexibility of Thermal and Electrical Storage Units in Active Energy Distribution Systems
, M.Sc. Thesis Sharif University of Technology ; Moeini Aghtaie, Moein (Supervisor)
Abstract
Nowadays, variable generation and renewable energy resources are increasingly penetrating the energy systems to supply the users' demand at the distribution grid. Variable Energy Resources (VER) can provide energy at a lower cost, and they also guarantee cleaner energy. Still, the uncertainty and variability from these resources' output can affect the net-load of the system at each hour. Besides, the issue of energy balance has always been a challenge for the energy distribution networks. A comprehensive way to unravel this problem is to use flexible resources. One of the crucial issues in the flexibility debate is meeting this need by different energy resources. It is always an issue for...
Presenting a New Model for Planning Studies of a Multi-energy Microgrid to Achieve a Low-carbon Society
, M.Sc. Thesis Sharif University of Technology ; Moeini Aghtaie, Moein (Supervisor)
Abstract
With the growing population and the development of human societies, the demand for energy increases. And it is expected that for the next few decades, fossil fuels will continue to be recognized as the main sources of energy supply and used to meet energy demand. One of the biggest disadvantages of fossil fuel consumption is the emission of greenhouse gases such as carbon dioxide, which raises the Earth's temperature and has devastating effects on the climate and the lives of its inhabitants. On the other hand, fossil fuels are recognized as non-renewable sources and their lifespan is only for the next few decades. Today, one of the major concerns of societies, especially in developed...
Energy planning and policy making; The case study of Iran
, Article Energy Sources, Part B: Economics, Planning and Policy ; Volume 11, Issue 8 , 2016 , Pages 682-689 ; 15567249 (ISSN) ; Vakili, A ; Eshraghi, H ; Hamidinezhad, A ; Naseri, I ; Sharif University of Technology
Taylor and Francis Inc
Abstract
Due to the limited resources of fossil fuels, energy supply–demand management and planning especially in the supply-side of the energy system have increasingly become very important. This article assesses Iran’s energy system in order to find the main causes of the considerably high energy intensity in the country compared with similar economies in size and production. Accordingly, fundamental policies and strategies are proposed in order to manage the recognized bottlenecks. The conclusions suggest strongly that not only the fossil-based energy system, but also incompatible patterns of production and consumption in the reference energy system as well as the use of conventional technologies...
Permissible emission limit estimation via iterative back-calculation: Case of Assaluyeh energy zone, southern Iran
, Article Integrated Environmental Assessment and Management ; Volume 14, Issue 1 , 2018 , Pages 130-138 ; 15513793 (ISSN) ; Saboohi, Y ; Tsatsaronis, G ; Sharif University of Technology
Wiley-Blackwell
2018
Abstract
In the present research work, an environmental policy procedure for setting a cap on emissions, as a crucial step in any total emission control system, has been provided and evaluated. It is shown that general regulations on emission intensities and rates do not guarantee that ambient air quality standards are met in intense industrial zones. Local emission limits are necessary to meet ambient air quality standards in these zones. To that end, we used dispersion simulators to back-calculate pollutant concentration thresholds for a large and intense energy system in the Assaluyeh region of southern Iran. Verified modeling results indicate 218 d of pollutant concentration threshold exceedance...
Stochastic framework for planning studies of energy systems: A case of EHs
, Article IET Renewable Power Generation ; Volume 14, Issue 3 , 2020 , Pages 435-444 ; Ghoraani, R ; Pasban, A ; Moeini-Aghtaie, M ; Safdarian, A ; Sharif University of Technology
Institution of Engineering and Technology
2020
Abstract
The substantial presence of different uncertainties in energy systems highlights the need for probabilistic analysis of operational and planning studies. Motivated by this fact, a new stochastic planning framework for energy hubs (EHs) is presented in this study based on the probability transformation concept. In the proposed framework, a measure of relative-likelihood impact is developed to estimate the importance of uncertainty sources in the studies, which, in turn, can remarkably reduce the overall complexity of stochastic problems. Step-by-step algorithm for implementation of the proposed framework on planning studies of an EH is also addressed in this study. Three different case...
Bi-level equilibrium of energy retailer–smart energy hub game in integrated energy market
, Article IET Smart Grid ; Volume 4, Issue 3 , 2021 , Pages 284-296 ; 25152947 (ISSN) ; Khazeni, S ; Rayati, M ; Ashourizadeh, A ; Sharif University of Technology
John Wiley and Sons Inc
2021
Abstract
An integrated view of energy markets has led to the introduction of new market participants named energy retailers (ERs). Competition among ERs in an integrated market greatly improves market performance in areas such as sustainability, supply security, and environmental awareness. ER performance is evaluated in an integrated market with emission penalty reduction in the objective function. Bi-level programming is used to model an ER game, and the equilibria of different configurations are compared. In the game's first level, ERs offer various energy carrier selling prices to optimise profits. In the second level, consumers respond by switching from the retail market to minimise their energy...
Transactive energy market mechanism with loss implication
, Article IEEE Transactions on Smart Grid ; Volume 12, Issue 2 , 2021 , Pages 1215-1223 ; 19493053 (ISSN) ; Aminifar, F ; Moeini Aghtaie, M ; Alizadeh, A ; Sharif University of Technology
Institute of Electrical and Electronics Engineers Inc
2021
Abstract
Electric distribution network is undergoing fundamental transition from conventional top-down structure to an environment where local prosumers, as transactive agents, are able to form peer-to-peer (P2P) energy trades among themselves. One of the challenges in such networks is allocating the incurred losses to the peers of the transactive market through a transparent and fair framework. In this article, it is demonstrated that the existing methods of loss allocation may cause a cross-subsidization problem when it comes to transactive energy systems, and a solution is offered to the problem. Furthermore, a novel transactive market mechanism is proposed which deploys the loss allocated to each...
Model for R&D planning in energy sector
, Article IEMC 2005: 2005 IEEE International Engineering Management Conference, St. John's, Newfoundland, 11 September 2005 through 13 September 2005 ; Volume II , 2005 , Pages 663-667 ; 078039139X (ISBN); 9780780391390 (ISBN) ; Saboohi, Y ; Ghofrani, M. B ; Sharif University of Technology
2005
Abstract
Optimal allocation of resources for R&D on new energy technologies is an important issue in the process of development of energy system models. In this study, a model of R&D planning in energy sector has been developed and it is then linked to the energy system model. Energy system model is used as a tool for the technology assessment and prioritization of new energy technologies is evaluated with the help of this model. Based on the economic and environmental impact of new technologies, the optimal allocation of resources for R&D of new technology is estimated with the help of the R&D planning model. The conceptual formulation of the model and its integration with the energy technology...
The Optimal Model of Energy and Exergy Flow for Evaluating Technology Changes in Oil Refinery (Case Study: North Tehran Oil Refinery)
,
M.Sc. Thesis
Sharif University of Technology
;
Saboohi, Yadollah
(Supervisor)
Abstract
In this project, a comprehensive model is developed for energy and exergy analysis in refineries. By studying Tehran’s North Refinery unit as a case study, the Reference Energy System as the conceptual model of the thesis and also Energy & Exergy Balance table is prepared. Through the exergy balance table, the Exergy efficiency defined. These factors help to settle priority for efficiency improvement investment. Then, the economic and technical relations and costraints are formulized using linear programming model. In this model, the CO2 emission and exergy destruction costs are intended. Using Energy System Model (ESM) software, the thesis model is advanced as RESM stands for Refinery...
Development of the energy hub networks based on distributed energy technologies
, Article Simulation Series, 26 July 2015 through 29 July 2015 ; Volume 47, Issue 10 , 2015 , Pages 216-223 ; 07359276 (ISSN) ; Elkamel, A ; Sattari Khavas, S ; Fowler, M ; Roshandel, R ; Elsholkami, M ; Sharif University of Technology
The Society for Modeling and Simulation International
2015
Abstract
In this paper the creation of multiple energy hubs that make up a complex energy network are modeled and optimized for a selection of six scenarios to examine both their financial viability and potential reduction of greenhouse gas emissions. As a proposed case study scenario for the model, three energy hubs are considered: a 'residential complex (RC)', a 'commercial shopping plaza (CS)', and a 'school (S)'. The use of combined heat and power systems, solar photovoltaic, solar collectors and network interaction are also examined for their impact on efficiency and cost. The modeling is undertaken and carried out by General Algebraic Modeling System (GAMS). It is shown that cost can be reduced...
Developing a model for optimal sizing of a small hydropower/PV hybrid system for electrification
, Article 2017 5th IEEE International Conference on Smart Energy Grid Engineering, SEGE 2017, 14 August 2017 through 17 August 2017 ; 2017 , Pages 170-176 ; 9781538617755 (ISBN) ; Farshidian, B ; Saboohi, Y ; Sharif University of Technology
Abstract
The present study investigates the possibility of using a small hydropower/PV hybrid power system for low-cost electricity production which can satisfy the energy load requirements of a typical rural-urban area. In this context, the optimal dimensions to improve the technical and economical performances of the hybrid system are determined according to the load energy requirements and the solar and hydro resources data using linear programming. The application of the model is demonstrated using a case study of a rural-urban area in Mazandaran province, Iran. Two scenarios were considered for optimizing the system components. In the first scenario, a stand-alone hybrid small hydropower/PV...
A novel lifetime prediction method for lithium-ion batteries in the case of stand-alone renewable energy systems
, Article International Journal of Electrical Power and Energy Systems ; Volume 103 , 2018 , Pages 115-126 ; 01420615 (ISSN) ; Dufo López, R ; Roshandel, R ; Bernal Agustin, J. L ; Sharif University of Technology
Elsevier Ltd
2018
Abstract
This paper presents a mathematical formulation of lithium-ion batteries, including aging and temperature effects. The model is developed by integrating the simplified single particle model (SSPM) and reduced-order model (ROM) to predict solid electrolyte interphase growth (SEI). Results show agreement with the experimental data at 25 °C operating temperature and moderate cycling currents. A maximum error of 3.6% in finding the battery discharged Ah is observed in harsh operating conditions, including 60 °C and approaching the end of life of the battery. Due to the typical operating conditions of stand-alone renewable energy systems, more accurate estimations are expected. Finally, this...
Lifetime optimization framework for a hybrid renewable energy system based on receding horizon optimization
, Article Energy ; Volume 150 , 1 May , 2018 , Pages 617-630 ; 03605442 (ISSN) ; Roshandel, R ; Sharif University of Technology
Elsevier Ltd
2018
Abstract
In this work, a novel convex sequence framework for real-time receding horizon operation optimization of a hybrid renewable energy system integrated with optimal sizing is presented to increase the penetration rate of renewable energy in supplying the demand. The proposed framework optimizes the entire lifetime cost of a system consisting of two main steps which are 1) design & installation and 2) operation as two sequence modules. This framework is applied to a hybrid renewable energy system which includes PV, wind turbine, batteries and a diesel generator. In the operation optimization, receding horizon strategy is used to optimize the operation schedule. Mixed integer convex programming...