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    Optimal installation capacity of medium hydro-power plants considering technical, economic and reliability indices

    , Article International Journal of Power and Energy Systems ; Volume 28, Issue 1 , 2008 , Pages 15-22 ; 10783466 (ISSN) Hosseini, S. M. H ; Forouzbakhsh, F ; Fotuhi Firuzabad, M ; Sharif University of Technology
    Acta Press  2008
    One of the most important issues in planning the reservoir type of Medium Hydro-Power Plants (MHPP) is to determine the optimal installation capacity of the MHPP and estimate its optimal annual energy value. In this paper, a method is presented to calculate the annual energy. A computer program has been developed to analyse energy calculation and estimation of the most important economic indices of an MHPP using the sensitivity analysis method. Another program, developed by Matlab software, calculates the reliability indices for a number of units of an MHPP with a specified load duration curve using the Monte Carlo method. Ultimately, comparing the technical, economic and reliability indices... 

    Determining the best sequence of load pickup during power system restoration

    , Article 2010 9th Conference on Environment and Electrical Engineering, EEEIC 2010, 16 May 2010 through 19 May 2010 ; May , 2010 , Pages 1-4 ; 9781424453719 (ISBN) Yari, V ; Nourizadeh, S ; Ranjbar, A. M ; Sharif University of Technology
    The first control action in power system restoration concerns the generation restart. In the initial phase of restoration, operators are often concerned with load pickup problems. One of the important problems during load pickup is keeping frequency response in allowable range. The aim of this paper is to determine the best sequence of load pickup by hydro and steam units during power system restoration based on frequency response of prime movers. Hydro power plants and combustion turbine units have the capability of black start operation and can be used for early stages of power system restoration. This paper considers hydro power plants for evaluating the stability and frequency response... 

    Hydropower plant site spotting using geographic information system and a MATLAB based algorithm

    , Article Journal of Cleaner Production ; Volume 152 , 2017 , Pages 7-16 ; 09596526 (ISSN) Serpoush, B ; Khanian, M ; Shamsai, A ; Sharif University of Technology
    Meanwhile with increasing demand for energy sources in the world, hydropower plants can be considered as clean energy sources for sustainable development. Hydropower plant environmental impact is almost none. They are easy to construct and operate with much lower cost in comparison with other types of power plants. Currently in Iran, Conventional methods for determining hydropower plant potent location are very complicated and do not always eventuated to the best result. This study focuses on run of river projects and proposes a new methodology to spot hydropower plan best location according to specific engineering criteria, using ArcGIS and an algorithm developed in MATLAB. An economic... 

    Service level based capacity rationing procedure for make-to-order manufacturing systems

    , Article International Journal of Engineering, Transactions A: Basics ; Volume 20, Issue 1 , 2007 , Pages 1-16 ; 17281431 (ISSN) Sharifyazdi, M ; Modarres, M ; Sharif University of Technology
    Materials and Energy Research Center  2007
    We extend a heuristic method within the framework of "dynamic capacity apportionment procedure" (DCAP) to allocate an existing capacity among the classes with different profit contributions. In general, DCAP is applied when some capacity shortage exists and can not be enhanced in short - run. Our proposed approach is constructed for a make - to - order manufacturing system that produces a variety of products while experiences a burst of demand in excess of capacity. Although, a higher level of profit can be gained by accepting more orders from higher priority classes at the expense of rejecting some or all of orders of lower priority classes, it may result in elimination of an existing... 

    Investigation of valve-closing law on the maximum head rise of a hydropower plant

    , Article Scientia Iranica ; Volume 16, Issue 3 B , 2009 , Pages 222-228 ; 10263098 (ISSN) Vakil, A ; Firoozabadi, B ; Sharif University of Technology
    Piping systems commonly experience the transient-state situation as the result of changes to flow conditions during pump failures, valve closures or turbine load rejection. This paper addresses transients as a consequence of the load rejection of a Francis hydropower plant (Karun 4, Ahwaz, Iran). To control the turbine system and related equipment during load rejection, the valve closing law of wicket gates is of paramount importance. The pressure rise at the end of the pressure shaft, the pressure drop in the draft tube and the speed rise while the electromagnetic braking torque disappears are solely dependent on the closing curve. Thus, an optimum closing law can eliminate the probable... 

    Modeling and Simulation of Hydro-Power Station and Determination and Evaluation of Governor Design Specifications

    , M.Sc. Thesis Sharif University of Technology Amir Nazmi Afshar, Peyman (Author) ; Durali, Mohammad (Supervisor)
    The main objective of this project is to take the first steps in designing power plants governor in Iran. In this work, we obtain a realistic model of a hydro-power plant including hydraulic characteristics from the dam to the outlet tail water, mechanically including: the turbine, the gates and all mechanical and dynamic parts, and electrically including generators, transformers and the consumption network. The model is used to simulate different working modes of turbine operation. The Bond Graph method is used for deriving the system equations and MATLAB software for simulations. A conceptual design of the governor is done and the governor model is combined with the turbine model. Using... 

    "Climate Change Impact on Hydropower Generation"

    , M.Sc. Thesis Sharif University of Technology Ansari, Sajedeh (Author) ; Abrishamchi, Ahmad (Supervisor)
    Industry Success leads to the use of fossil fuels in communities that result to climate change in the world. Among these effects, there is the effect on the severity, extent and duration of precipitation. Hydroelectric plants are clean and cheap energy resources in the world that due to the use of water, the phenomenon of climate change are very impressionable. Regarding high costs of construction and maintenance of these dams in order to exploit their lengthy; Impact of climate change on them is important issue.
    In this research, first a nonlinear optimization model to maximize hydroelectric power generation by genetic algorithms in the MATLAB software environment has been developed.... 

    Determination of installation capacity in reservoir hydro-power plants considering technical, economical and reliability indices

    , Article International Journal of Electrical Power and Energy Systems ; Volume 30, Issue 6-7 , 2008 , Pages 393-402 ; 01420615 (ISSN) Hosseini, S. M. H ; Forouzbakhsh, F ; Fotouhi, M ; Vakilian, M ; Sharif University of Technology
    One of the most important issues in planning the "reservoir" type of hydro-power plants (HPP) is to determine the installation capacity of the HPPs and estimate its annual energy value. In this paper, a method is presented. A computer program has been developed to analyze energy calculation and estimation of the most important economic indices of an HPP using the sensitivity analysis method. Another program, developed by Matlab software, calculates the reliability indices for a number of units of an HPP with a specified load duration curve using the Monte Carlo method. Ultimately, comparing the technical, economic and reliability indices will determine the installation capacity of an HPP. By... 

    Seasonal prediction of Karoon streamflow using large-scale climate indices

    , Article World Environmental and Water Resources Congress 2011: Bearing Knowledge for Sustainability - Proceedings of the 2011 World Environmental and Water Resources Congress, 22 May 2011 through 26 May 2011 ; May , 2011 , Pages 1184-1193 ; 9780784411735 (ISBN) Azimi, M ; Golpaygani, F ; Tajrishy, M ; Abrishamchi, A ; Sharif University of Technology
    Water resources limitation in arid and semi arid regions on one hand and water demand increase on the other, have made the optimum utilization of existing water resources and systems necessary. In this context, researchers are trying to increase the accuracy and lag time of prediction by using various statistic and empirical models as well as different local and long-range variables in the last decades. Karoon River is the greatest and most important river in Iran because of agricultural water demand supply and hydroelectric power production. Therefore streamflow prediction of this river has considerable economical and social benefits. In this study the relationship between Karoon stramflow... 

    Utilization of in-pipe hydropower renewable energy technology and energy storage systems in mountainous distribution networks

    , Article Renewable Energy ; Volume 172 , 2021 , Pages 789-801 ; 09601481 (ISSN) Saber, H ; Mazaheri, H ; Ranjbar, H ; Moeini Aghtaie, M ; Lehtonen, M ; Sharif University of Technology
    Elsevier Ltd  2021
    Million miles of gravity-fed drinking water and sewage pipelines around the world, especially in rural and urban areas in mountain ranges, have introduced a new renewable energy sources (RES), i.e., in-pipe hydropower systems (IHS). Output power of this technology, similar to other types of RES, suffers from intermittency, while it is still more predictable in comparison to other technologies of RESs. Besides, energy storage systems (ESS) are introduced as a pivotal technology for dealing with the intermittent and non-dispatchable characteristics of IHS through spatio-temporal arbitrage. This paper aims to develop a stochastic mixed-integer linear programming (MILP) formulation that... 

    GIS Based Procedure to Determine Location of Cascade Small Hydropower Plants Case Study, Nokhan Area

    , M.Sc. Thesis Sharif University of Technology Serpoush, Behrad (Author) ; Shamsai, Abolfazl (Supervisor)
    Coinciding with the worldwide environmental issues and increasing demand for clean energy sources, hydropower plants have highly attracted decision- makers attention. Low manufacturing costs and pollutions which are made by these plants in comparison with another types of powerhouses, could be reason of that. And so on, hydropower locating and evaluating studies have been highly increased recently, specifically in developing countries. From the point of operation procedure, hydropower plants are generally divided in two types, run-of-he-river and storage projects. This study has concentrated on run-of-he-river projects and due to spotting plant location, Sefidbarg river basin... 

    Optimal tuning of temporary droop structure governor in the hydro power plant

    , Article 2008 IEEE 2nd International Power and Energy Conference, PECon 2008, Johor Baharu, 1 December 2008 through 3 December 2008 ; 2008 , Pages 100-105 ; 9781424424054 (ISBN) Abdolmaleki, M ; Ranjbar, A. M ; Ansarimehr, P ; Borjian Boroujeni, S ; Sharif University of Technology
    Load-frequency control is the intrinsic function of the governor in the power plants. It would be used in variant structures depend on the controller type such as PID, adaptive, fuzzy or robust. Temporary droop structure governor (TDSG) was commonly used in Hydro power plants (HPP). After representation of TDSG, this paper is dedicated to introducing a procedure for tuning TDSG parameters. The technique is based on pole placement for the closed loop poles of the system. These poles correspond to the TDSG parameters that by accurate tuning of them, pole placement is accomplished. The results for tuning TDSG of Abbaspour HPP have been presented as well. © 2008 IEEE  

    Provide a Model for the Sitting of Hydroelectric Power Plants Using GIS and Multiple Criteria Decision FTOPSIS: A Case From Kelas Basin

    , M.Sc. Thesis Sharif University of Technology Darban Maghami, Alireza (Author) ; Shamsai, Abolfazl (Supervisor)
    Nowadays due to increasing environmental considerations and effort to reducing of the fossil fuels consumption, the necessity of hydroelectric power plants development is emerged. The purpose of this study is to suggest a method of spatial analysis for finding sites with appropriate potential for construction of these power plants, using TOPSIS and GIS. In this research, using the Python programming language, in software environment of Arc GIS version 9.3, local hydrological model was generated using the DEM layer and using of streams ordering methods, the overall situation along the river were processed. In the next step, with using of fuzzy TOPSIS algorithm implementation in software... 

    Climate change impact assessment on hydrology of Karkheh Basin, Iran

    , Article Proceedings of the Institution of Civil Engineers: Water Management ; Volume 166, Issue 2 , 2013 , Pages 93-104 ; 17417589 (ISSN) Jamali, S ; Abrishamchi, A ; Marino, M. A ; Abbasnia, A ; Sharif University of Technology
    This paper addresses the impacts of climate change on hydrology and water resources in the Karkheh River Basin (KRB), which is the third most productive basin in Iran and has great potential for hydropower generation. The total potential capacity of reservoirs in this basin is more than 15 ×109 Mm3, of which 40% has been built. The sensitivity of the KRB to potential climate change is investigated by simulating basin streamflow response under different climate change scenarios. A conceptual rainfall-runoff model (IHACRES) was first calibrated by using hydrological and streamflow observations. The model was then applied by downscaling two general circulation model outputs (CGCM3 and HadCM3)... 

    Paths of technological capability building in complex capital goods: the case of hydro electricity generation systems in Iran

    , Article Technological Forecasting and Social Change ; Volume 122 , 2017 , Pages 215-230 ; 00401625 (ISSN) Kiamehr, M ; Sharif University of Technology
    This paper investigates the accumulation of technological capability in latecomer suppliers of complex capital goods by exploring the issue in an Iranian supplier of large hydro electricity generation systems. The findings suggest that, contrary to the conventional paths of catch-up in Asian and Latin American mass-producing electronics firms, and instead of starting from early stages of product lifecycle, the technological capabilities in this case were acquired through a non-linear movement within the stages of designing and installing complex capital goods in projects: starting from the middle stage (engineering and realisation of complex goods in projects), moving to the last stage... 

    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) Haghi, E ; Farshidian, B ; Saboohi, Y ; Sharif University of Technology
    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 new low-cost swirler for axial micro hydro turbines of low head potential

    , Article Renewable Energy ; Volume 128 , 2018 , Pages 375-390 ; 09601481 (ISSN) Hoghooghi, H ; Durali, M ; Kashef, A ; Sharif University of Technology
    Elsevier Ltd  2018
    This paper presents a new design process of a low-cost swirler employed in axial micro-turbines. The swirler is simple in design, inexpensive and easy to produce and has good adaptability to different potential conditions without major changes. The blades are shaped from trapezoid-shaped steel sheets curved to a certain radius to form a tin airfoil with suitable outlet angle distribution from hub to tip. The formed blades are then welded between two concentric rings to form a round cascade. Correction from flow to blade angles, namely induced incidence and trailing edge deviation angles, were calculated by CFD analysis and considered in blade shape design. The manufactured prototype made on... 

    Policy framework of non-fossil power plants in Iran’s electricity sector by 2030

    , Article International Journal of Sustainable Energy Planning and Management ; Volume 29 , 2020 , Pages 91-108 Abbasi Godarzi, A ; Maleki, A ; Sharif University of Technology
    Aalborg University press  2020
    The Iranian government has set a target of a 20% share of non-fossil fuel electricity generation by 2030, whose main result is reducing Green House Gas (GHG) emissions (about 182 million tonnes in 2017) to achieve the targets pledged under the Paris Climate Accord. So, this paper presents a comprehensive model on the expansion of non-fossil technology to evaluate the impact of increasing their share in Iran’s electricity supply system. This analytical approach is based on system dynamics (SD) that was developed based on dynamic behavior of electricity market, with an emphasis on the expansion of non-fossil fuels (solar photovoltaics, wind turbines, expansion turbines, and hydro power) in the... 

    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 Rezaei Mirghaed, M ; Saboohi, Y ; Sharif University of Technology
    Springer  2020
    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... 

    Water-energy nexus approach for optimal design of hybrid cooling system in direct reduction of iron plant

    , Article Journal of Cleaner Production ; Volume 287 , 2021 ; 09596526 (ISSN) Hashemi Beni, M ; Morad Bazofti, M ; Akbari Mohammadi, A ; Mokhtari, H ; Saboohi, Y ; Golkar, B ; Ghandi, A. H ; Sharif University of Technology
    Elsevier Ltd  2021
    Direct reduction of iron process in steel industry has special production conditions. Low quality cooling water, low cold and high hot cooling water temperature, space limitation for new equipment installation, high value-added of product and severe effect of cooling water temperature on production rate are of these conditions. Considering technical and economic constraints and limitations, this situation makes this process an attractive case study for converting the existing wet cooling tower to hybrid cooling system. In this paper, based on integration of process, dry and wet cooling system and ambient conditions profiles, a new method for designing hybrid cooling system has been proposed....