Search for: photovoltaic-system
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    Simultaneous Production of Electricity , Hydrogen& Heat by Photovoltaic System in a Residential House

    , M.Sc. Thesis Sharif University of Technology Fakourian, Samane (Author) ; Saboohi, Yadollah (Supervisor) ; Roshandel, Ramin (Co-Advisor)
    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... 

    Evaluation of optimal occasional tilt on photovoltaic power plant energy efficiency and land use requirements, Iran

    , Article Sustainability (Switzerland) ; Volume 13, Issue 18 , 2021 ; 20711050 (ISSN) Fathi, A ; Bararzadeh Ledari, M ; Saboohi, Y ; Sharif University of Technology
    MDPI  2021
    The paper studies the optimum panel horizontal orientation angle toward the Sun and the optimum time interval of the panel’s movement. The optimum time intervals or panel movement can change the rate of input energy to the panel surface in Iran. For this purpose, a neural network has been trained to estimate the intensity of solar radiation in Iran. After model validation, the intensity of solar radiation has been estimated by selecting adequate geographical regions. Based on the intensity of sunlight, Iran has been divided into ten regions. In these regions, 40 cities have been randomly selected to study the effect of the panel’s angle variations within appropriate time inter-vals, as well... 

    Simulation and Implementation of Active Energy Management Algorithm on Residential Photovoltaic System with Storage

    , M.Sc. Thesis Sharif University of Technology Ghafouri Varzaneh, Saeed (Author) ; Abbaspour, Ali (Supervisor)
    In majority of the (standalone or grid-connected) PV Systems, predefined rule-based algorithms are utilized in order to manage and control the flow of power. The function of these algorithms is to send the generated energy from solar panels either to load for consumption, or to battery for storage, or to the grid for sale. Their performance is based on predefined instructions and regardless of load change and consumption patterns. Therefore the total efficiency of these systems depend greately upon individual user’s load type and consumption pattern. In current research, an optimum and dynamic energy management algorithm is proposed using dynamic programming (DP) method, in order to increase... 

    Solar Concentrator Using Light Splitting Method for PV Systems

    , M.Sc. Thesis Sharif University of Technology Kiyaee, Soroush (Author) ; Saboohi, Yadollah (Supervisor) ; Moshfegh, Alireza (Co-Advisor)
    Given the population growth in the world and in dire need of electricity and to reduce pollution and moving toward sustainable development, renewable energy has special importance in the world. Iran, with 300 days of sunshine a year is one of the countries with high potential in the field of solar energy but for various reasons, solar energy has no significant role in our energy portfolio. Considering the purchase of solar power by the government, reduce solar electricity costs and payback time of the factors that could make greater use of this energy. In this projects using light splitting method, in addition to reducing cell area used, by removing a significant portion of the sun's rays... 

    Experimental Investigation of PVT System Combined with Thermoelectric Module

    , M.Sc. Thesis Sharif University of Technology Mohsenzadeh, Milad (Author) ; shafii, Behshad (Supervisor) ; Saboohi, Yadollah (Supervisor)
    Photovoltaic phenomena is the base of Photovoltaic cells technology that can transform the solar insolation to electricity directly. In this transformation, the solar insolation intensity is the important factor to increase the performance of the Photovoltaic cells but one of the biggest barriers in the extension way of this technology is its more cost that need to be decrease. Concentration of solar radiation method is the best way to increase the performance of Photovoltaic systems and decrease its initial cost. At this project a novel structure of solar parabolic through concentrator is investigated experimentally and analytically. The usage of Thermoelectric module with Photovoltaic... 

    Development of an Integrated Solar Energy System for a Typical Educational Building

    , M.Sc. Thesis Sharif University of Technology Motavaselian, Ali Mohammad (Author) ; Saboohi, Yadollah (Supervisor)
    In the present thesis, A Computer software has been developed to evaluate technical and economic aspects of photovoltaic systems, off-grid and on-grid configuration, in urban areas where the electricity grid is accessible. As a case study the building of Energy Engineering faculty with annual demand of electricity in lighting section equals to 80048 kWh was considered. Regarding incident radiation and PV system characteristics with the aid of utilizability concept, a technical evaluation has been performed then life-cycle saving index was considered as a criterion for choosing an optimum nominal size of the system. Results show that for current electricity tariff of educational buildings ... 

    A novel modulation method for reducing common mode voltage in three-phase inverters

    , Article Conference Proceedings - 2017 17th IEEE International Conference on Environment and Electrical Engineering and 2017 1st IEEE Industrial and Commercial Power Systems Europe, EEEIC / I and CPS Europe 2017, 6 June 2017 through 9 June 2017 ; 2017 ; 9781538639160 (ISBN) Noroozi, N ; Zolghadri, M. R ; Yaghoubi, M ; Sharif University of Technology
    Leakage current is originated from common-mode voltage (CMV) time variations in a grid-connected photovoltaic (PV) system and results in several deficiencies. In this paper, a new method is proposed for CMV reduction in a three-phase voltage source inverter (VSI) system. The proposed method is based on space vector modulation and it utilizes only odd and zero vectors. By using the proposed method, the number of fluctuations of the CMV waveform per switching cycle is reduced; therefore, the amount of high-frequency harmonics of CMV is decreased. In addition, because of applying both active and zero vectors by the proposed method, the total harmonic distortion becomes less than most of other... 

    Capacity and output power estimation approach of individual behind-the-meter distributed photovoltaic system for demand response baseline estimation

    , Article Applied Energy ; Volume 253 , 2019 ; 03062619 (ISSN) Li, K ; Wang, F ; Mi, Z ; Fotuhi Firuzabad, M ; Duić, N ; Wang, T ; Sharif University of Technology
    Elsevier Ltd  2019
    Accurate customer baseline load (CBL) estimation is critical for implementing incentive-based demand response (DR) programs. The increasing penetration of grid-tied distributed photovoltaic systems (DPVS) complicates customers’ load patterns, making the CBL estimation more difficult because the volatile actual load and the intermittent PV output power are coupled together. A PV-load decoupling framework is proposed in this paper to address the above issue. The basic idea is to decouple the actual load power and the PV output power, then estimate them separately. To this end, historical PV output power data of each individual DPVS is required. However, pure historical PV output power data is... 

    Experimental Investigation of Photovoltaic/thermal-Thermoelectric Hybrid System with Phase Change Material

    , M.Sc. Thesis Sharif University of Technology Mazloom, Ali (Author) ; Shafiee, Mohammad Behshad (Supervisor) ; Borooshaki, Mehrdad (Supervisor)
    Nowadays energy consumption increases in our daily life and incredibly enhancement of growth rate can be seen recent years. Hence, the use of renewable energy is prioritized. Solar energy is one of the choices because it is free and available. In this research, it has been tried to get electrical and thermal power at a reasonable cost both during the day and night. The system is equipped with a linear parabolic concentrator with a collector installed in the center of the concentrator which has been installed on its faces photovoltaic cells and thermoelectric modules, and five different systems have been tested with different components. Also, the paraffin has been used as a phase change... 

    Simulation and Techno–Economical Analysis of an Improved Integrated Concentrated Photovoltaic/Organic Rankine Cycle System

    , M.Sc. Thesis Sharif University of Technology Moltames, Rahim (Author) ; Roshandel, Ramin (Supervisor)
    The combination of photovoltaic technology and Organic Rankine Cycle reduces the temperature of the solar panel and, on the other hand, generates separate electricity from excess heat. The reason for the use of the Organic Rankine Cycle is the low temperature of the heat source. It is not economical to use other cycles like steam Rankine cycle in low-temperature heat sources. To maximize the plant factor of the Organic Rankine cycle system, especially when there is not enough solar radiation, it is possible to utilize the flue gas heat recovery in office buildings and reduce the cost of electricity generation. In this project, the simulation of this system is carried out for the Energy... 

    Optimal Design of Mircogrid Components Containing Renewable Resources

    , M.Sc. Thesis Sharif University of Technology Kalantari, Alireza (Author) ; Parniani, Mostafa (Supervisor)
    Nowadays, microgrids which comprise decentralized generation (DG) have attracted considerable attention. Establishment of DG-based microgrids that are normally connected to the main grid, is a practical method to reduce the costs of power outage and to increase the electricity supply reliability. The aim of this thesis is optimum planning of a microgrid containing wind turbines, photovoltaic systems and diesel generators, considering both the grid-connected and isolated modes of operation.
    In the areas with considerable solar radiation and wind potential valuable opportunities exist in utilizing these resources. In addition to these renewable resources, the use of controllable resources... 

    Optimization of PV-wind-diesel System

    , M.Sc. Thesis Sharif University of Technology Sedghi Dehnavi, Majid (Author) ; Kazemzadeh Hannani, Siamak (Supervisor)
    Design hybrid systems to supply electrical energy for off grid domestic consumer in the remote villages in Iran are the main objective of this work. The hybrid systems considered in this study consist of photovoltaic array, wind turbine, battery and diesel generator. Measured wind speed data used for wind turbine energy production model. The hybrid system optimized to supply 6, 14, 20, 40 and 60 families in Bojnoord, Moorchehkhoort, Kish, Langrood, Khash and Meshkinshahr. The main purpose of optimization is to find the economic system, able to fulfill the energy requirements of a given load distribution; so Iran’s current economy and cost, considered. The optimized results for studied cities... 

    Designing a Smart Micro-grid Connected to Solar PV System for the Energy Department of Sharif University and Developing a Web-based Software for Management

    , M.Sc. Thesis Sharif University of Technology Tayebirad, Rasoul (Author) ; Boroushaki, Mehrdad (Supervisor) ; Roshandel, Ramin (Supervisor)
    This project aims to design a smart microgrid connected to the utility grid in order to supply the demand of Energy Engineering Department at Sharif University of Technology. The electrical structure of this micro-grid is included utility grid, photovoltaic system with energy storage system and a consumer. Due to the energy storage system, an operation strategy is presented that is proportionate to the installed capacities in microgrid and based on a price basis that is determined by the micro-grid operator at the beginning of each day, in order to manage energy is provided. Micro-grid energy management is divided into two sections that the implementation of each part is depended to the... 

    Incorporation of CsPbI3 Perovskite Quantum Dots as Interrfacial Layer for Highly Efficient Cs0.05MA0.95PbI3 Perovskite Solar Cells

    , M.Sc. Thesis Sharif University of Technology Kamraninejad, Vahid (Author) ; Simchi, Abdolreza (Supervisor)
    Despite the excellent photovoltaic performance of perovskite solar cells (PSCs), the instability of PSCs under severe environment (e.g., humidity, intense light) limits further commercialization of such devices. Therefore, in recent years, many researches are conducted on utilizing Perovskite Quantum Dots (PQDs) to enhance performance of PSCs. Herein, CsPbI3 PQDs interfacial layer is incorporated in the perovskite/hole transport material (HTM) interface, on the purpose of increasing charge carrier mobility and preventing electron-hole recombination to increase performance of the PSCs. CsPbI3 PQDs is synthesized at 170℃ with oleic acid and oleylamine as organic ligands by hot-injection... 

    Introducing a novel method for improving the design of off-grid photovoltaic systems

    , Article 2019 Smart Gird Conference, SGC 2019, 18 December 2019 through 19 December 2019 ; 2019 ; 9781728158945 (ISBN) Davoudi, M ; Moeini Aghtaie, M ; Mosaddegh, H. R ; Sharif University of Technology
    Institute of Electrical and Electronics Engineers Inc  2019
    Using the potential of off-grid photovoltaic systems is a feasible way to supply electrical energy to locations which are far from the national electricity grid. In the design process of these systems, it is important to choose an appropriate capacity of these panels, since it should be able to steadily supply energy in all-weather conditions, especially cloudy days. In the conventional algorithm to design these panels and determine the capacity of these photovoltaic arrays, the number of cloudy days is not considered. Thus, in this papers, a new method is introduced in order to find out the appropriate capacity of off-grid photovoltaic arrays in the planning process of these systems. © 2019... 

    Design and Implementation of a Modular 3-Ph Grid Connected Solar Inverter

    , M.Sc. Thesis Sharif University of Technology Barmaki, Alireza (Author) ; Zolghadri, Mohammad Reza (Supervisor) ; Attarodi, Mojtaba (Co-Supervisor)
    Recently a new topology, namely “common ground inverter” is introduced which since it enjoys a direct connection between AC neutral and DC ground, essentially solves the problem of leakage current in grid connected applications. Moreover, a reduced implementation price and a simple control scheme is associated with this system. The Aforementioned features have absorbed a lot of attention for further research regarding this topology. In this research one of the three introduced topologies is considered in details and its function in supplying local loads and Grid is put to the test. Moreover, important efforts have been taken to improve the properties of the inverter in terms of efficiency,... 

    Improving the performance of the finned absorber inclined rooftop solar chimney combined with composite PCM and PV module

    , Article Solar Energy ; Volume 228 , 2021 , Pages 562-574 ; 0038092X (ISSN) Ashouri, M ; Hakkaki Fard, A ; Sharif University of Technology
    Elsevier Ltd  2021
    Solar Chimney (SC) can play a significant role in energy consumption reduction of ventilation applications. The primary purpose of this study is to ameliorate the performance of an inclined rooftop SC integrated with the Phase Change Material (PCM) and Photovoltaic (PV) module, called the SC-PCM-PV system. To this aim, the effects of using finned absorbers and composite PCMs on the performance of the SC-PCM-PV system are investigated for the first time. A 3D-CFD model is developed via the finite volume method to examine the impact of various design parameters, including fin number, fin thickness, PCM type, and PCM mass on natural ventilation duration, ventilation capacity, and power output.... 

    Linked Planning of Power Grids and Subsidy Policies on Using Photovoltaic Cells for Residential Electricity Supply

    , M.Sc. Thesis Sharif University of Technology Balmaki, Saeed (Author) ; Ehsan, Mehdi (Supervisor)
    In recent years, due to restructuring in the electric power industry, distributed generation has become one of the most important subjects and DGs and renewable energy sources have been increasingly expected as a supplement and an alternative to a conventional large scale central power system. their success depends not only on the distribution of the available renewable energy sources in a region but also on the power grids connectable capacity in the area. Photovoltaic system is one of the best RESs for residential electricity supply because it is noiseless and solar power is widely available and households can use it via photovoltaic cells in their homes. There are two major problems... 

    Reliability Incorporated Modeling and Analysis of Lead Acid Battery in Renewable Energy Systems

    , M.Sc. Thesis Sharif University of Technology Hamedi, Amir Sina (Author) ; Rajabi Qahnuyeh, Abbas (Supervisor)
    Energy and environment crisis in past decades raised concerns about fossil fuels use and has accelerated renewable energy application in terms of solar electric, solar thermal and wind turbines. Due to the fluctuating nature in renewable resources, renewable electric power generation has a stochastic nature that makes it difficult to use by the electricity consumers. Energy storage plays a key role to put more control on renewable power generation.Lead-acid battery is a storage technology that is widely used in photovoltaic systems. Battery investment and maintenance costs account for a big part of photovoltaic system costs. Charging and discharging profiles of the battery has a great impact... 

    Operation Reserve Determination in a Power System Containing Renewable Generation

    , Ph.D. Dissertation Sharif University of Technology Ghaedi, Amir (Author) ; Abbaspour Tehranifard, Ali (Supervisor) ; Fotouhi Firouzabad, Mahmoud (Co-Advisor)
    Renewable energy resources, e.g. wind, solar and geothermal, experience rapid progresses in electric power industry all over the world. So, it becomes essential that these free-emission electrical energy resources be integrated in the existing generating capacity planning procedures. On the other hand, the uncertain and intermittent nature of these energies has led to some problems in their integration in power systems. The reserve requirement in a renewable-based power system is a main challenge, which has to be addressed properly. In this way, this research presents an analytical approach, based on the modified PJM method, to quantify the risk of renewable energies commitment during the...