Search for: renewable-energy-resources
0.007 seconds
Total 177 records

    Policy making for generation expansion planning by means of portfolio theory; case study of Iran

    , Article International Journal of Renewable Energy Research ; Volume 7, Issue 3 , 2017 , Pages 1426-1435 ; 13090127 (ISSN) Adabi, F ; Mozafari, B ; Ranjbar, A. M ; Soleymani, S ; Sharif University of Technology
    International Journal of Renewable Energy Research  2017
    The complex structure of the power system and the pivotal role of electrical energy in determining the socio-economic indicators of any countries lead the policy makers of power industry to take into account the expansion planning of generation system with high priority. Considering the intense fluctuations of costs in electrical energy generation (particularly due to variation of fuel prices within the recent years in the Middle East), finding an optimal generation portfolio, regardless of the costs variations risk looks impossible. The portfolio theory, as an efficient tool for risk management, provides a proper solution to materialize the optimal generation portfolios with the following... 

    Techno-Economic Site-Specific Sizing Optimization of Wind Turbines

    , M.Sc. Thesis Sharif University of Technology Rezaei Mirghaed, Mohammad (Author) ; Roshandel, Ramin (Supervisor)
    The present study was aimed at developing a model to optimize the sizing of wind turbines according to the region’s wind condition and the capital costs of each part of the turbine. The proposed model, which consists of technical aerodynamic, economic and optimization sub-models, is used to achieve maximum annual energy production by a fixed cost of a single or a number of wind turbines. A cost model has been used to determine the detailed cost of the turbine’s components. The model’s results are presented for two regions in Iran, Khaf and Ahar, and the optimized configurations for a single turbine and a wind farm have been investigated.A case study for the region- Manjil that has some... 

    Design of a Small Scale Vertical Axis Wind Turbine

    , M.Sc. Thesis Sharif University of Technology Soltanieh, Hossein (Author) ; Ebrahimi, Abbas (Supervisor) ; Darbandi, Masoud (Supervisor)
    Today, renewable energies such as solar and wind power are replaced to fossil fuel. Wind turbines are two categories; horizontal axis and vertical axis. Vertical axis turbines are not dependent on wind direction and since equipments are installed at the bottom of these turbine towers, maintenance is easy. Among vertical axis turbines, performance of darrieus turbine is better. The aim of this thesis is, analysis and preliminary designing of 1-kilowatt darrieus wind turbine, based on climate of the country, for using in urban environments or areas where there is no economic justification for development of power grid systems. In this regard, statistical data base is made up of vertical axis... 

    Development of an integrated model for airflow in building spaces

    , Article Renewable Energy ; Volume 31, Issue 4 , 2006 , Pages 401-416 ; 09601481 (ISSN) Farhanieh, B ; Sattari, S ; Sharif University of Technology
    In building energy simulation, an integrated modelling of airflow in the building needed. Therefore, in this paper two approaches are used for building energy simulation: zonal network for modelling of the building segments and Computational Fluid Dynamics (CFD) for modelling of the airflow. It is noted that a synchronize solution process is needed for the building and the CFD equation-sets. For this purpose an iterative procedure is used to corresponding solution of these equations. © 2005 Elsevier Ltd. All rights reserved  

    Experimental Investigation of Heat Pipes Application in Solar Water Heaters

    , M.Sc. Thesis Sharif University of Technology Arab, Mobin (Author) ; Soltanieh, Mohammad (Supervisor) ; Shafii, Mohammad Behshad (Supervisor)
    Nowadays, radical increase in energy consumption guides humankind to find and harvest some alternative energy resources. Between the energy resources that have ever been known, Solar Energy is the most traditional one and Solar Water Heaters (SWHs) are the most ancient tools that have been used to store this energy up to now. Regarding this issue, many researches have been done to investigate different aspects of SWHs and the most conventional type was Thermosyphon SWH system. In this study, our aim is to investigate the influence of Pulsating Heat Pipes (PHPs) application as a heat transfer tool to convey absorbed solar energy to hot water reservoir of a SWH. In order to do this research,... 

    Hydrodynamic Analysis of “Persian Gulf” Bridge and Feasibility Study of Using Energy Production Systems on the Bridge Structure

    , M.Sc. Thesis Sharif University of Technology Seifollahi, Ali (Author) ; Abbaspour, Majid (Supervisor)
    Nowadays, because high global demand for energy has led to the extensive use of fossil fuels with numerous unintended consequences such as air pollution and greenhouse effect, research and development around optimization of energy infrastructure has become much more important. Consequently, many scientific approaches have been applied to replace fossil fuels with renewable natural energy resources. One of the renewable energy types that fewer papers have been published about it, is the enormous energy of Marine currents. The origin of this energy is mostly tidal effect, or ocean currents that are available in most of oceans and seas around the planet earth. The most important criteria for... 

    , M.Sc. Thesis Sharif University of Technology Hassanpour Estahbanati, Amir Esmaeil (Author) ; Sattari, Sorena (Supervisor)
    According to the Government policy in order to make targeted subsidies and apply it on various sectors in the industrial, commercial, agricultural, household and etc. changes in the energy supply needed resources in this section are required to appear. The agriculture sector is one of the most important parts of the food production is the production of security and health product. In this regard, the production of greenhouse products in terms of the use of high yielding varieties, production of the off-season, better control factors in production and reduce water consumption has increased drastically. The main source of supply in the internal energy of the greenhouse heating is mainly fossil... 

    A Novel Optimization Algorithm for Reliable Energy based on Wind, Solar and Fuel Cell

    , M.Sc. Thesis Sharif University of Technology Khayyamim, Tara (Author) ; Hajsadeghi, Khosro (Supervisor) ; Zabihollah, Abolghasem (Supervisor)
    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... 

    Optimization of a Multi Carrier System for a "Green Building"

    , M.Sc. Thesis Sharif University of Technology Rahimzadeh, Azin (Author) ; Shafiee, Mohammad Behshad (Supervisor) ; Roshandel, Ramin (Co-Advisor)
    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... 

    Planning and Optimization of an On-site Energy Service Network for a Rural Region

    , M.Sc. Thesis Sharif University of Technology Ahadi, Hassan (Author) ; Avami, Akram (Supervisor)
    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... 

    Smart Grid Planning Considering Renewables and Demand Response Programs

    , M.Sc. Thesis Sharif University of Technology Chegnizadeh, Mohsen (Author) ; Hosseini, Hamid (Supervisor)
    The concept of smart grid to realize the triple goals of economy, reliability and environmental improvements has taken advantage of modern equipment and new structures. Beside these goals smart grids seek to increase the level of penetration of renewable resources for environmental improvement. On the other hand, increase in dispersed products and problems resulting from increasing these non-dispatchable resources thus led the researches to design a new structure called microgrid. Microgrid improves the reliability of these resources and facilities their uses. But uncertainty and intermittency in producing renewable energy resources are among the main challenges facing these microgrids.... 

    Simulation of Solar Hot Water System By TRNSYS-Case Study of Rahman Abad Park

    , M.Sc. Thesis Sharif University of Technology Khorrami Banadaki, Siamak (Author) ; Kazemzadeh Hannani, Siamak (Supervisor) ; Abbaspour, Majid (Supervisor)
    Limitations of fossil energy resources and environmental factors such as gas emission and global warming, forces human being to tend to apply renewable energies especially solar energy resource. Iran, which is located in yellow belt of the earth, has a high potential to be benefited from solar energy. Since more than 40 percent of energy resources are consumed in the building section, using solar energy I buildings can help the country to reduce the energy consumption. Space Cooling and heating and water heating are some examples of solar energy applications in buildings. Because, there are various types of climates in the world, there is not a unified code and guideline to design and... 

    Feasibility Study and Design of Artificial Energy Island (in Persian Gulf Region)

    , M.Sc. Thesis Sharif University of Technology Norouzi, Parham (Author) ; Abbaspour Tehranifard, Majid (Supervisor)
    As it is obvious from the name of this study, the goal of doing this study is the feasibility study of southern shores of Iran for building an artificial energy island for and designing it. In this project by studying seven points coastwise of southern Iran and defining the criterions and scoring the points, the Chabahar was determined as the best place for erecting the artificial energy island. With respect to the environmental condition of the chosen point and modeling in software ANSYS, the structure of the artificial energy island has been studied and the type, geometric shape, area, trough, and the setting of the anchoring system has determined. As a result of these efforts, a hexagon... 

    Wind Farm Modeling for Power System Stability Studies

    , M.Sc. Thesis Sharif University of Technology Mirnezhad, Hosein (Author) ; Parniani, Mostafa (Supervisor)
    Considering the continuous growth of renewable energy sources in electric grids, the importance of utilizing simple, generic, and upgradable models for different network stability studies is increasing. In recent years, generic and standard wind turbine models for transient and short-term frequency and voltage stability studies have been developed. In this regard, researchers are still working on promotion of the generic models, especially to expand them for unbalanced transient studies, improve the transient response, and include inertia response. In this thesis, different methods for generic modeling of wind turbines are surveyed and the development procedure of WECC and IEC generic model... 

    Simultaneous Expansion Planning of Distribution Network and Microgtrids

    , M.Sc. Thesis Sharif University of Technology Zayer, Mansour (Author) ; Hosseini, Hamid (Supervisor)
    Renewable resources, because of their compatibility with the environment, accessibility, and low cost of operation, have become the center of unprecedented attention. Since the output of these resources cannot be predicted accurately, they are usually implemented in microgrids with conventional generating units and energy storage systems.Furthermore, distribution networks are integral parts of power systems, and many studies have been conducted in order to improve them. Because of high investment and operation costs of distribution networks and environmental concerns, it is necessary to conduct meticulous economic studies so that with proper investments, profitable opportunities are provided... 

    Development of an Integrated Model of Electricity & Methanol Co Production Through Solar Energy and CO2 Capture

    , M.Sc. Thesis Sharif University of Technology Mahmoodi Azar, Karwan (Author) ; Saboohi, Yadollah (Supervisor)
    Emission of CO2 and its diffusion into atmosphere is associated with negative effects on the environmental such as Green House Gases effect. Various techniques of CO2 Capture in energy conversion and processing plant are investigated. A method of CO2 Capture could be based on utilization of solar energy for producing methanol. Basic design of such a system and feasibility analysis of developing that system has been considered on the subject of the present research work. Basic design and commercial feasibility of the system producing methanol through capturing CO2 from exhaust gases of a power plant and hydrogen produced by using solar energy have done such an integrated system. The main... 

    Experimental Investigation of Electricity Generation in Dual Chamber Microbial Fuel Cell- Effective Parameters in Cathode Chamber

    , M.Sc. Thesis Sharif University of Technology Bakhshian, Sahar (Author) ; Kariminia, Hamid Reza (Supervisor) ; Roshandel, Ramin (Supervisor)
    Two major challenges facing countries all around the world are the demand for renewable energy resources and treatment of large quantities of industrial and household wastewaters. One of the new and environmentally acceptable methods to produce green energy is Microbial Fuel Cells (MFCs), which has been noted by many researchers in recent years. MFC is a new technology which has the ability to produce green energy along with treatment of wastewater stream, based on oxidation of organic maters through microbial metabolism. In this study we investigated the effects of different cathode chamber parameters on operation and efficiency of a two chamber MFC at laboratory scale. These parameters... 

    Wind Harvesting via Vortex Induced Vibration for Electricity Generation

    , M.Sc. Thesis Sharif University of Technology Moradi Gharghani, Farshad (Author) ; Behshad Shafii, Mohammad (Supervisor) ; Mousavi, Ali (Supervisor)
    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... 

    Development of a Framework to Utilize Thermoelectrochemical-aging Battery Models in Optimal Design of Renewable Energy Systems

    , Ph.D. Dissertation Sharif University of Technology Astaneh, Majid (Author) ; Roshandel, Ramin (Supervisor)
    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... 

    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 Rezaie, Farhad (Author) ; Moeini Aghtaee, Moein (Supervisor)
    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,...