How can the compensation structure of Iran's natural gas distribution services be modified based on incentive-based regulations?

, Article Energy ; Volume 285 , 2023 ; 03605442 (ISSN) Kasiri, M ; Mirnezami, R ; Sharif University of Technology

Elsevier Ltd 2023

Abstract

Although the government owns most of Iran's natural gas industry, outsourcing has begun via build-owned-and-transfer (BOT) contracts in development, and fixed-price service contracts for operation and maintenance. For instance, in the distribution industry, the private sector now performs 50 % of the tasks. Variable unit costs show the necessity for performance- and incentive-based rules to address the variability of enterprises' pay systems. These costs are greater for public firms in certain places and lower in others. Using the financial data of 31 Iranian natural gas distribution companies from 2010 to 2019, this study develops parametric models to evaluate time-variant, and...

Design snd Analysis Compact Heat Exchangers and Choose and Design Heat Exchanger for Gas Turbines

, M.Sc. Thesis Sharif University of Technology Kasiri, Abbas (Author) ; Ghorbanian, Kaveh (Supervisor)

Economic optimization of heat pump-assisted distillation columns inmethanol-water separation

, Article Energy ; Volume 80 , 2015 , Pages 496-508 ; 03605442 (ISSN) Shahandeh, H ; Jafari, M ; Kasiri, N ; Ivakpour, J ; Sharif University of Technology

Elsevier Ltd 2015

Abstract

Finding efficient alternative to CDiC (Conventional Distillation Column) for methanol-water separation has been an attractive field of study in literature. In this work, five heat pump-assisted schemes are proposed and compared to each other to find the optimal one; (1) VRC (Vapor Recompression Column), (2) external HIDiC (Heat-Integrated Distillation Column), (3) intensified HIDiC with feed preheater, (4) double compressor intensified HIDiC-1, and (5) double compressor intensified HIDiC-2. GA (Genetic Algorithm) is then implemented for optimization of the schemes when TAC (Total Annual Cost) is its objective function. During optimization, two new variables are added for using only...

Reduction of sensor population in a camera sensor network

, Article 2008 International Symposium on Telecommunications, IST 2008, Tehran, 27 August 2008 through 28 August 2008 ; 2008 , Pages 349-353 ; 9781424427512 (ISBN) Sanjabi, M ; Samavi, S ; Ashori, M ; Karimi, N ; Fotohi, M ; Kasiri, K ; Sharif University of Technology

2008

Abstract

The problem of surveillance for intrusion detection in a camera sensor network is addressed in this paper. In order to save limited resources, a sensing task should involve just the right number of sensors. For a wide enough coverage area random and uniform distribution can be applied. We propose a novel method which allows reduction of number of sensors and guarantees a desired surveillance against aerial intrusion. Enhancement of the method is also offered to further reduce the number of sensors and improve the performance. ©2008 IEEE

Enhancing acid fracture design in carbonate formation using a dynamic up-scaling procedure to convert discrete fracture network to dual continuum

, Article Petroleum Science and Technology ; Volume 40, Issue 18 , 2022 , Pages 2284-2304 ; 10916466 (ISSN) Kasiri Bidhendi, M. R ; Khorsand Movaghar, M. R ; Humand, M ; Bazargan, M ; Sharif University of Technology

Taylor and Francis Ltd 2022

Abstract

For a low-permeability carbonate formation, the acid fracture process is simulated through coupling a commercial acid fracture simulator (GOHFER) to a finite volume reservoir simulator (IMEX). Unlike LGR (Local grid refinement) approach that suffers from severe convergence problems, a dynamic up-scaling procedure is employed to convert the discrete fracture network (DFN) model into a dual continuum model for our simulation. In this paper, multiple simulations are used to optimize the acid fracture schedule parameters, such as fluid volume, flow rate, perforation location, number of injection steps, and acid type, in order to maximize the effective fracture length. For four points perforation...

Simulation of the Effect of Acid Fracturing on the Production of a Well in a Gas Condensate Reservoir

, M.Sc. Thesis Sharif University of Technology Kasiri Bidhendi, Mohammad Reza (Author) ; Masihi, Mohsen (Supervisor) ; Bazargan, Mohammad (Supervisor)

Abstract

Many of gas condensate reservoirs, including rich gas and lean gas, face with fast well productivity decline. The origin of this problem is condense accumulation around the well bore which known as condensate blockage. There are different condensate blockage mitigation methods, one of which is acid fracturing that is suitable for tight carbonate reservoirs with low KH. Acid fracturing simulation is high difficult and have not been undertaken a study that can adopt with experimental and field test results, so researchers usually use practical method and many developed software in this area use correlation form laboratory data. However, the literature show that experimental results can just...

High Saline Water Treatment by the Process of Membrane Distillation Combined with Solar Energy

, M.Sc. Thesis Sharif University of Technology Shokrollahi, Milad (Author) ; Rajabi, Abbas (Supervisor) ; Musavi, Abbas (Supervisor)

Abstract

In this study, membrane distillation process was used for treatment of high salinity waters. The focus of this study is to simulate and build a setup of membrane distillation process. Since the membrane distillation process is based on the driving force of the temperature difference, the required temperature is provided by both the use of heaters and the use of solar energy. To increase the feed temperature by solar energy, a black polymer coating on the main membrane is used. The main membrane used in this process is PVDF polymer and the polymer coated on the surface is the PAN polymer. After simulating and constructing the laboratory setup, the influence of a variety of parameters on the...

, M.Sc. Thesis Sharif University of Technology (Author) ; Akbarzadeh, Abbas (Supervisor)

Abstract

FGM sheets with component or grain size gradient in their thickness direction provide mechanical and physical gradient properties through ND direction. FGMs are fabricated by various methods including centrifugal casting, powder metallurgy, PVD and CVD,all of which suffer from some shortcomings such as porosity of the products, low rate and high cost of production and restrictions on mass production. In this study, 2 and 4 layered Al matrix FGM sheets containing SiC and Al2O3 powders were fabricated by laminating method of Accumulative Roll Bonding(ARB). Two approaches of stacking were chosen as accumulative coupled roll bonding (ACRB) and (ASRB) for initial roll bonding and subsequent...

Deposition of Ceramic Nanoparticles on Aluminum Sheet by Air Gun Spraying for ARB Processing of Nanocomposite Sheets

, M.Sc. Thesis Sharif University of Technology Keramat, Ehsan (Author) ; Akbarzadeh, Abbas (Supervisor)

Abstract

Particle reinforced aluminum matrix composites have considerable attraction in automotive and aerospace industries due to their special properties as light weight, high ratio of strength/density, improved elastic modulus, low coefficient of thermal expansion and high wear and corrosion resistance. Among the production processes of metal matrix composites, accumulative roll bonding process has particular importance due to producing ultrafine grained composite sheets. However, uncontrolled and undesired agglomeration of particles is the main problem in producing these composites. In this research, the Al2O3 and SiC nanoparticles were electrostatically stabilized against agglomeration by...

Make Policy for Optimizing Iran Gas Export

, M.Sc. Thesis Sharif University of Technology Alvandi, Mehdi (Author) ; Maleki, Abbas (Supervisor)

Abstract

This project examines four alternatives such as pipelines, oil injection wells, LNG & GTL in the purpose of Iran gas utilization. In this Project four strategies using cost/benefit analysis are examined. For this purpose, at first the cost of inlet feed gas per Mmbtu are calculated. Then regarding various scenarios of average world gas prices for the following thirty years, the cost & benefit of any way will be counted. Then with the use of energy security, the project will make energy policy. For this purpose, Shannon indicator will be used as one of the most reliable indicators. Due to the of use this indicator, the popular project will be chosen accordingly as a certain amount of gas the...

Diffusion of Lipid and Protein Molecules in Cell Membranes

, Ph.D. Dissertation Sharif University of Technology Khoshnood, Atefeh (Author) ; Jalali, Abbas (Supervisor)

Abstract

Lipid membranes are fundamental constituents of cell membranes and are now used in lap-on-a-chip technology. Membranes in living cells contain a significant fraction of proteins, which undergo lateral random movements due to thermal fluctuations and shear forces imposed by the solvent fluid. Prominent natural and biotechnological systems where membranes are highly sheared include the plasma membrane of endothelial cells, and membranes used in biosensors for high throughput screening of drug candidates, and in water purification devices. In these systems membrane is in direct contact with the mainstream suspension flow, which is driven by pressure gradients. The efficiency and function of...

Hot Workability of a Free-cutting Steel with Severe Sulfur Segregation During Continuous Casting

, M.Sc. Thesis Sharif University of Technology Naghdy, Soroosh (Author) ; Akbarzadeh, Abbas (Supervisor)

Abstract

Splitting in ingot cast structures and transverse cracks in continuous cast structures are the main problems of hot rolling of low carbon resulfurized free-cutting (LCRF) steels. Presence of high volume fraction of manganese sulfide inclusions in cast structure increases the risk of alligatoring in hot rolling. Because of high sulfur content of these steels and probability of formation of low melting point phases, minimum level of manganese and maximum level of copper and tin is necessary. Morphology of manganese sulfide is another important factor in hot forming of these steels, which can be controlled by level of deoxidation in steel making. In fact, MnS2 is present in fully killed...

(Assessing the Role of Carbon Capture and Storage Technology on Iran’s Oncoming Energy System(Technology Deployment Policy Making

, M.Sc. Thesis Sharif University of Technology Banan, Zoya (Author) ; Maleki, Abbas (Supervisor)

Abstract

Based on International Energy Agency studies, achievement of 450 ppm CO2-equivalent emission target in global emission means that the CO2 emissions in 2050 must be reduced to %50 of 2005 level, and this implies that a portfolio of emission reduction policies and strategies need to be exploited through current century.
At the present time, Carbon Capture and Storage (CCS) Technology is a dominant strategy among all the long-term carbon abatement strategies in many countries. Nevertheless, its potential as a climate mitigating option will be proved, only if it is implemented in the countries which are developing at a great pace and taking advantage of fossil fuels in order to afford their...

Development of an Analytical Framework for Evaluation of Climate Change Mitigation Policies on Iran’s Energy Security

, M.Sc. Thesis Sharif University of Technology Eshraghi, Hadi (Author) ; Maleki, Abbas (Supervisor)

Abstract

Climate change and energy security are key drivers for future energy policy. While energy security has been a pillar of energy policy for about a century, concern about climate change is more recent and is bound to radically change the landscape of energy policy. Policy makers are now under increasing pressure to address these twin challenges: to develop cost-effective policies that will both ensure the security of our energy system and reduce greenhouse gas emissions.
Main Effort in this Project is to construct an integrated model of Iran’s energy system to serve as a policy analysis tool, by which policymakers are able to identify the future effects of a wide range of policies in...

Evaluation the Effect of Thermo-Mechanical Parameters on Microstructure and Texture of Electrical Steel for Improving Magnetic Permeability

, M.Sc. Thesis Sharif University of Technology Ahmadian, Peyman (Author) ; Akbarzadeh, Abbas (Supervisor)

Abstract

Dependence of some magnetic properties such as core loss and permeability on temper rolling was studied in this thesis. It is shown that with a proper temper rolling sharper textures are obtained in the electrical steel and the magnetic properties in the longitudinal and traverse directions are improved. By texture analysis, it is shown that because of temper rolling, shear strain on the surface of the sheet is the main factor for abnormal grain growth and shear texture formation on the surface. The result of formation of this texture is enhancement of the {100} intensity and reduction of the {111} intensity, leading to the improvement of the permeability. Temper rolling is always...

Risk Management for DG Owners

, M.Sc. Thesis Sharif University of Technology Karimi, Ahmad (Author) ; Rajabi, Abbas (Supervisor)

Abstract

Distributed generation (DG) and its utilization have some benefits and risks for its owner and power network. From owner perspective, benefits of DG include selling energy, reducing costs related to fuel, and other economic benefits. However, there are some risk factors for the owner including risk of supplying fuel, risk of selling generated power, and other risk factors related to establishment of the DG unit. Utilizing risk-reduction tools such as signing agreements for selling power, purchasing fuel, and related economic tools are necessary for risk management of the owners of DG units. The purpose of this thesis is to investigate the economic situation of the DG units and optimize the...

Exception Fault Localization in Smart Mobile Applications

, M.Sc. Thesis Sharif University of Technology Mirzaei, Hamed (Author) ; Heydarnoori, Abbas (Supervisor)

Abstract

In software programs, most of the time, there is a chance of error, even though they are tested carefully. Finding error-related pieces of code is one of the most complicated tasks and it can make incorrect results if done manually. Semi-automated and fully-automated methods have been introduced to overcome this issue. The rapid growth of developing smart mobile applications (SMAs) in recent years, competition among the development teams and many other factors have increased the chance of errors and hence, the quality of these applications have reduced. There are two approaches to test SMAs in order to reach a high degree of quality: (1) using existing traditional methods and adapting them...

Investigation of Performance and Aeroelastic Characteristics of Wind Turbine Blades Based on Flexible Multibody Dynamics Model

, M.Sc. Thesis Sharif University of Technology Sekandari, Mahmoud (Author) ; Ebrahimi, Abbas (Supervisor)

Abstract

Aeroelasticity analysis and prediction of wind turbines sturcture deformations are fundamental parts in their design. Increasing the size of wind turbine blades and development of Mega-watt sized wind turbines have enhanced the importance of these studies. In this study, the aeroelasticity analysis of a wind turbine blade has been done based on flexible multibody dynamics method. For this purpose, the modal approach has been used for modeling blade structure which has been considered as a flexible beam with bending and torsion degrees of freedom. The unsteady vortex lattice method has been used to calculate aerodynamic loads in order to combine with wind turbine blade structure model. Using...

A Mobile Application Recommender System Based on User's Reviwes

, M.Sc. Thesis Sharif University of Technology Mossein, Mobasher (Author) ; Heydarnoori, Abbas (Supervisor)

Abstract

The ever increasing growth of smart phones and their applications have led to the emergence of various platforms, i.e. online stores, for distributing them among users and providing a way for customers and developers to interact with each other. In recent years, these stores have turned into an important form of software repositories, which brought out new challenges for researchers. One of these challenges is the task of searching for suitable applications and providing simple access to them for users. Pervious work has focused on the relationships between users and applications’ contents. Among the shortcomings of these approaches, is not considering users’ reviews of applications and what...

Investigation of Economic Incentives for Reducing Energy Intensity in Industrial Sector

, M.Sc. Thesis Sharif University of Technology Abdoli, Adel (Author) ; Maleki, Abbas (Supervisor)

Abstract

The trend of increasing energy intensity in the country, despite awareness of the officials and managers of the need to take action to improve it, is ongoing. Various studies conducted worldwide to improve the productivity of energy. These studies suggest ways for improving energy intensity; suggestions that will never be implemented, because of lack of utility consideration of actors. In this research, in search for energy intensity reduction barriers in the industrial sector of the country, a game theoretical approach has been applied. In this study’s modeling, energy consuming firms as an actor, compete with each other and the government as an important actor in the implementation or...