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Wind Harvesting via Vortex Induced Vibration for Electricity Generation
, M.Sc. Thesis Sharif University of Technology ; Behshad Shafii, Mohammad (Supervisor) ; Mousavi, Ali (Supervisor)
Abstract
There is a need for renewable energy sources to be more feasible. The purpose of this project is to develop a compact device that is able to harvest wind energy and transform it into electrical energy using the concept of vortex shedding. When calibrated correctly, the vortex shedding will induce resonant oscillation. Electricity would be collected from this oscillation using a magnet and coil assembly. This method was proven to work in water, but has not been applied to air currents. Our group designed and built a small-scale prototype to be tested in closed circuit wind tunnel. The wind harvester works at a moderate wind range of 3 to 5 m/s. Data was collected on the amplitude and...
Optimization of a Multi Carrier System for a "Green Building"
,
M.Sc. Thesis
Sharif University of Technology
;
Shafiee, Mohammad Behshad
(Supervisor)
;
Roshandel, Ramin
(Co-Advisor)
Abstract
Ever-increasing energy consumption and consequent extensive greenhouse gas (GHG) emissions are two major urgent problems faced by all human beings in the 21st century. As a major contributor, the energy production section appears to be the most suitable field where further improvements could be explored to tackle these problems. Multi carrier energy system is a typical type of next generation energy production technology with higher energy efficiency and lower/zero GHG emissions. The conversion of energy between different carriers establishes a coupling of the corresponding power flows resulting in system interactions. The investigation of such phenomena requires the development of tools for...
A Novel Optimization Algorithm for Reliable Energy based on Wind, Solar and Fuel Cell
, M.Sc. Thesis Sharif University of Technology ; Hajsadeghi, Khosro (Supervisor) ; Zabihollah, Abolghasem (Supervisor)
Abstract
Concerns like fuel cost, pollution and global warming has made it necessary to look for new energy solutions. Renewable and alternative energies have proven themselves to be helpful in this matter. Renewable energy(RE) is the energy that comes from natural resources such as sunlight, wind, rain, tides, waves and geothermal heat, which are naturally replenished at a constant rate. Renewable energies are environmentally friendly, not cheap at the beginning but naturally available in a constant rate and wide spread, unlike fossil fuels that are localized in the limited places. In this thesis in order to generate environmental friendly power we consider two renewable energy resources: wind and...
Investigating and Analyzing the Use of Renewable Energies to Reduce Environmental Pollution with an Emphasis on the Automotive Industry
, M.Sc. Thesis Sharif University of Technology ; Mostafavi, Mostafa (Supervisor)
Abstract
Today, different cities in the world have hurried to consumers, natural resources, and producers of waste. Our cities are not excluded from this rule, especially metropolitan like Tehran, which accounted for only 12% of the country's land area, accounting for 15% of the volume of airborne contamination in the country. Considering the importance of the environmental pollution issue and the many researches done in this field, the present study attempts to investigate and analyze the application of renewable energy to reduce environmental pollution with an emphasis on the automotive industry. This is an applied research in terms of purpose. These types of researches are applicable because these...
Developing a Framework for Providing the Flexibility of Active Consumers of Energy Distribution Networks
, M.Sc. Thesis Sharif University of Technology ; Moeini Aghtaie, Moein (Supervisor)
Abstract
The power systems’ net-load variability and uncertainty would aggravate significantly as the penetration of Renewable Energy Resources (RERs) in power systems increases. In response, power system researchers have introduced a new concept, namely flexibility, to quantitatively and systematically deal with unavoidable features of RERs. In power distribution systems as the connection point of power systems with customers, there are many opportunities for improving the flexibility level of systems. Nowadays, the emergence of prosumers has created new opportunities for distribution system operators in providing the system with different services of flexibility in distribution systems. Therefore,...
Modeling Applications of Flow Battery for Optimal Energy Management of Blockchain Mining
, M.Sc. Thesis Sharif University of Technology ; Moeini Eghtaei, Moein (Supervisor)
Abstract
In recent years, the high energy consumption of blockchain technology has led to the creation of major problems such as more greenhouse gas emissions and additional pressure on the power grid. In this regard, the emerging technology of flow batteries for large-scale electricity storage might be a suitable choice to overcome both problems. In this research, a novel interdisciplinary methodology has been developed to optimize the flow battery design in different scenarios of energy systems with blockchain mining electricity demand. In this methodology, a new electrochemical model was developed for the vanadium redox flow battery with a no-mixing design, and its results were validated on...
Hydrogen Development Strategies for the Future of Iran's Energy Systems
, M.Sc. Thesis Sharif University of Technology ; Maleki, Abbas (Supervisor)
Abstract
Many pieces of evidence of climate change show that humanity should be concerned about the future of its life and the planet. The concentration of carbon dioxide in the atmosphere has reached its highest level. Therefore, in recent years, the reduction of publications and climate issues has been on the agenda of governments. For this reason, governments and various international organizations are looking for a way to change and reform the global energy system. Forecasts indicate a decrease in the share of fossil fuels and an increase in the percentage of renewable energies and hydrogen. Hydrogen has been introduced as the future fuel carrier due to its many advantages such as the...
Assessing the Environmental Impact of Electric Vehicles in Different Technology Development and Energy Supply Scenarios: A Case Study of Tehran
, M.Sc. Thesis Sharif University of Technology ; Khajehpour, Hossein (Supervisor)
Abstract
Air pollution has been one of the most important problems in Tehran in recent years. So that the number of deaths due to air pollution in Tehran reaches more than 7000 cases per year. More than 75% of air pollutant emissions in Tehran city (including 60% of PM2.5 emissions) originate from mobile sources. Considering the harmful effects and damages caused by air pollutants, it is important to examine and evaluate the effects of hybrid-electric vehicles on the emissions of the transportation sector and air quality, especially in areas with a large population and realized high traffic load. On the other hand, the continuous reduction of renewable electricity production costs makes electricity a...
Developing a Model to Assess the Optimal Utilization of Energy Resources in the Context of Sustainable Energy Development
, Ph.D. Dissertation Sharif University of Technology ; Saboohi, Yadollah (Supervisor)
Abstract
Sustainable development of the energy system requires policies for ensuring reliable access to energy services with the lowest economic and environmental costs. Despite owning abundant reserves of fossil resources, Iran has witnessed an imbalance in the supply and demand of energy carriers, especially gas, gasoline, and electricity, over the past years. Within a comprehensive and detailed research, the optimal pattern of utilizing non-renewable energy resources along with renewables is evaluated in the context of sustainable energy development. The developed tool based on the integrated assessment approach can be used as a scientific analytic measure for the implementation of the desired...
Investigating Scenarios for Reducing Carbon Footprint of Greenhouse Products Using Energy-Efficient Technologies in Iran
, M.Sc. Thesis Sharif University of Technology ; Roshandel, Ramin (Supervisor)
Abstract
The present study aims to reduce the carbon footprint of greenhouse products to provide a decision tool for sustainable development of greenhouses. In order to provide this decision tool, the impact of four scenarios or energy-efficient technology for greenhouse heating, including: combine heat and power system(CHP), new greenhouse covering material, industrial symbiosis, and solar collector on the carbon footprint of greenhouse products has been studied because one of the main factors in the release of carbon footprints of greenhouse products is the use of fossil fuels for greenhouse heating. Energy modeling has been used to estimate the amount of heating, cooling, and artificial lighting...
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...
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...
Designing a Framework for Power Exchange in Local Energy Market of a
Microgrid Using the Concept of Blockchain Technology
,
M.Sc. Thesis
Sharif University of Technology
;
Moeini Aghtaee, Moein
(Supervisor)
Abstract
By entering the concepts of transactive energy systems, microgrids and peer-to-peer networks into the local energy market, it has made it possible to implement local energy market in the microgrids more than ever. In transactive energy systems, with the elimination of the intermediate entity, exchanges take place directly between the different parts of the system, which results in increased system flexibility and reduced system costs. In this study, by applying blockchains in local energy market and in micro-grids and transactive energy systems, a framework is proposed to implement local energy market in an energy micro-grid based on blockchain. By using blockchain features and structure,...
Development of a Framework to Utilize Thermoelectrochemical-aging Battery Models in Optimal Design of Renewable Energy Systems
, Ph.D. Dissertation Sharif University of Technology ; Roshandel, Ramin (Supervisor)
Abstract
The operating conditions of the battery in renewable energy systems affect its electrochemical behavior and degradation process. Recent research mainly estimates battery lifetime through conventional methods such as counting the number of equivalent battery life cycles or based on simple experimental models that may lead to optimistic predictions in battery service period. In this study, a reduced-order thermoelectrochemical-aging battery model is developed for the application of renewable energy systems and the battery degradation analysis is investigated by this model. The proposed microscopic model evaluates the effect of battery operating conditions such as state of charge, current and...
A Framework for Lifetime Management and Optimization of Hybrid Renewable Energy System Based on Integrated Methodology of Design and Energy Management System (Operation). Case study: Integrated Photovoltaic/wind Turbine System
, Ph.D. Dissertation Sharif University of Technology ; Roshandel, Ramin (Supervisor)
Abstract
In this project, a comprehensive methodology is developed to present the lifetime management and optimization framework for hybrid renewable energy systems. The main purpose of this work is to minimize the lifetime cost and improve the system reliability based on the interaction between different optimization levels related to different steps in the system lifetime. The proposed methodology is generally presented by providing a connection between the three specified optimization levels: 1) Planning: including design and long-term optimization models which is performed before system operation, 2) Real-time operation: By employing the receding horizon optimization which is applied from the...
Isolated Microgrid Planning with Solar Resource and Load Dynamics
, M.Sc. Thesis Sharif University of Technology ; Fotuhi-Firuzabad, Mahmoud (Supervisor) ; Rajabi-Ghahnavieh, Abbas (Supervisor)
Abstract
In conventional planning methods for an isolated microgrid, loads’s performance is taken into account in a constant power factor. Also, Motor loads dynamics which might results in absorbing a reactive power up to a few times more than the load’s capacity isn’t considered in this methods. Another important issue in the microgrid’s stability is the microgrid’s spinning reserve. Due to the isolated microgrid’s disconnectivity and not considering these problems in small isolated microgrids, the possibility of an instability event in microgrid’s performance would rise enourmously. In this thesis, an isolated microgrid’s planning has been carried out based on a solar resource while taking into...
Pollution Cost assessment of Energy Systems; Case Study: Guilan Province
, M.Sc. Thesis Sharif University of Technology ; Saboohi, Yadollah (Supervisor)
Abstract
The energy section has a significant share in the emission of environmental pollutants. Based on the recent investigations about 80 percent of greenhouse gases are emitted into the environment from this sector. This present research has focused on estimating costs of pollution control, using the energy system model. In order to have a better understanding of the relationship between energy and environment, the reference energy system for Guilan Province has been developed; then by having energy demand data, historical capacity data for each technologies and potential of energy resources as well as, the development of provincial energy system has been studied. After the model verification and...
Planning and Optimization of an On-site Energy Service Network for a Rural Region
, M.Sc. Thesis Sharif University of Technology ; Avami, Akram (Supervisor)
Abstract
Nowadays, classic energy supply systems are rapidly shifting towards more efficient, with less pollution, and more economic energy systems. In the meantime, the growing dependence of human activities on energy sources and the reduction of fossil fuels resources as the main source of energy supply at present time, has led to fundamental changes in the energy policy of communities. The use of distributed power generation systems utilizing renewable energy sources is one of the solutions that have been proposed in this regard. This research aims to develop a local energy supply network for a specific rural district using energy sources in place, so that the area is energy self-sufficient and...
Evaluation of the Impact of Exhaustible Energy Resources on Factor Productivity
, M.Sc. Thesis Sharif University of Technology ; Saboohi, Yadollah (Supervisor)
Abstract
Economics is the science of using scarce resources, which helps to identify the optimal use of economic resources. Enhancement of productivity leads more efficient use of resources in economics sectors. Identification of ways and means of improving productivity is an important policy issue which requires an analysis of the effects of determinants of productivity. In the present research work, Total Factor Productivity (TFP) has been econometrically estimated; based on production function theory. Application of this concept indicates that the elasticities of total value-added (i.e. GDP minus oil rents) with respect to physical capital and labor are 0.8 and 0.2 respectively. It is further...
Optimisation of Energy Flow Model for an Educational Building
, M.Sc. Thesis Sharif University of Technology ; Saboohi, Yadollah (Supervisor) ; Roshandel, Ramin (Supervisor)
Abstract
Increase in energy consumed by buildings, which constitute about 40% of the global final energy consumption and their respective contribution to CO2 emmission has led the building owners and users toward using on–site energy production systems and especially clean energy sources. The present research aims to find the optimal solution to the building energy supply problem under current and other possible circumstances. Energy Engineering Department of Sharif University of Technology has been selected in representation of educational buildings in Iran for case study. ESM software which is based on the MESSAGE model has been used as the modeling tool. Results state that under the current...