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    An integrated and optimal joint scheduling of energy resources to feed electrical, thermal and potable water demands in remote area

    , Article Iranian Journal of Electrical and Electronic Engineering ; Volume 12, Issue 4 , 2016 , Pages 281-291 ; 17352827 (ISSN) Ghaffarpour, R ; Mozafari, B ; Ranjbar, A. M ; Sharif University of Technology
    Iran University of Science and Technology 
    The continuous spread of distributed energy resources (DERs) such as combined heating and power (CHP), diesel generators, boilers and renewable energy sources provide an effective solution to energy related problems to serve the power and heat demands with minimum cost. Moreover, the DERs may play a significant role for supplying power and heat in rural areas, where grid electricity is not available. Also, some dry areas may face water scarcity and salinity problems. So, one important solution is the use of DERs to drive desalination units in order to solve water scarcity and salinity problems. In this study, the optimal scheduling of DERs and reverse osmosis (RO) desalination unit that feed... 

    Simulation for Optimized CHP and Piping Network Design for Residential Area

    , M.Sc. Thesis Sharif University of Technology Zeynalabedini, Mostafa (Author) ; Abbaspour, Madjid (Supervisor) ; Kazemzadeh, Siamak (Supervisor)
    Rapid growing use of energy resources in recent decades, caused to focus on combined heat and power generation systems according to their high efficiencies. Energy efficiencies with these technologies will be up to 90 percent. Some benefits of Co-generation systems are their high efficiencies, omitting of transmission and distribution lossesin the electricity grid, fuel consumption reduction, moving to ward privatization,independent and decentralized production of electricity and heat, increase competition in the power generation and reduction theemission of greenhouse gases, particularly carbon dioxide. In This article theeconomicsof combined heat and power generator stobe installed... 

    Modeling of RCCHP System for SERI Building and Estimation of its Useful and Final Energy Demands

    , M.Sc. Thesis Sharif University of Technology Masoumzadeh, Amin (Author) ; Saboohi, Yadollah (Supervisor)
    Increased exploitation of energy resources has led to growing attention to the CHP systems due to their high efficiency. High energy loss in power transmission network, which is about 20 %, is an additional reason for growing attention to CHP. In addition to that, utilization of small scale CHP systems has provided ground for growing competition with distributed generators based on renewable energy resources. Selection of optimal technology based on economical and environmental criteria requires application of analytical tool. An analytical tool could avail itself of identifying optimal program for operation of cogeneration systems. The present research work has been implemented to develop... 

    Study and Modeling of CHP Systems in Power Plant

    , M.Sc. Thesis Sharif University of Technology Bagheri, Arash (Author) ; Bastani, Dariush (Supervisor)
    In the present study, a heat recovery system for a distributed generation plant (DG) with a 1 MW gas combustion engine has been designed. The purpose of this designing is converting the power plant to a CHP system. For the existing heat recovery system, a shell & tube heat exchanger is designed to recover the thermal energy from exhaust gases and a plate heat exchanger is designed to recover the thermal energy from the engine jacket cooling fluid. The heat exchanger design has been calculated manually and also by use of software. In the software calculation, the heat exchanger design has been done by use of the Aspen HTFS +2006.5 software. In the manual one, the Kern equation (1950) was... 

    Exergy Loss Evaluation in a Combined Heat and Power Cycle in a South Pars Gas Refinery

    , M.Sc. Thesis Sharif University of Technology Babaye Khorasani, Firoozeh (Author) ; Farhadi, Fatollah (Supervisor)
    In this thesis the replacement of separate heat and power production with combined heat and power system in South Pars Gas Refinery is investigated. High Exergy loss is associated with conventional concept of Heat and power generation. Alternative methods for combined heat and power (CHP) production are investigated and four different technologies are proposed: 1) process steam production by HRSG, 2) power production by condensing steam turbine, 3) CHP production by non-condensing steam turbine, and 4) CHP production by condensing steam turbine. Energy and exergy efficiency and profitability of these technologies are compared with separate heat and power production. The result shows that... 

    Optimal Sizing and Operation of CHP Based on Stochastic Programming

    , M.Sc. Thesis Sharif University of Technology Bozorg, Mokhtar (Author) ; Ehsan, Mehdi (Supervisor)
    CHP (Combined Heat and Power) generates electricity and thermal energy simultaneously from input fuel. Since it has high energy efficiency and low installation time, it is an appropriate approach in energy management of residential complexes. In this project, stochastic programming based on Monte Carlo approach is used to handle uncertainties in the optimal sizing of CHP for residential complexes. Availability of CHP, boiler and AC bus as well as the electrical and thermal load forecast errors are considered as stochastic variables. Minimizing system total cost considering the probability of each scenario obtained from the scenario reduction algorithm is the objective function. The system... 

    Optimization of Sizing and Operation for a Multi-Carrier Energy System

    , M.Sc. Thesis Sharif University of Technology Sheikhi, Aras (Author) ; Ranjbar, Ali Mohammad (Supervisor)
    Increasing energy demand and at the same time, considering exhaustible fossil fuel resources has led to increase distributed generation for reducing energy loss and increasing efficiency of energy systems specially due to technical development on generation systems that meet environmental and energy policy concerns. One of the most important distributed energy technologies is Combined Heat and Power (CHP). CHP is small, high efficiency, low installation time and self-contained electric generation plant that can provide power for household applications, commercial or industrial facilities and hence its applications are overtly increasing. It can reduce power loss and enhance service... 

    Determination the Optimal Size of the Heating and Cooling Network with the Power Generation for Implementation of District Energy System in a Residential Area with Multiple Users

    , M.Sc. Thesis Sharif University of Technology Karbalaie Mirza, Ali Reza (Author) ; Abbaspour, Majid (Supervisor) ; Kazemzadeh Hannani, Siamak (Supervisor)
    In recent decades, rapid growth in the utilization of energy resources has led to using a system of combined power, heating and cooling due to their high efficiency. Losses of electrical power transmission and distribution networks are also another reason to emphasize using the combined production systems. Today, the use of small scale combined production systems at the same time, competitive with electricity generated from renewable energy technologies have also emerged. The present study was undertaken to answer questions on the topic of disrict heating and cooling system design with power that can be occur. For this purpose, first the governing mathematical equations are expressed and... 

    Optimization of Size and Operation of Energy Hub Considering Uncertainty

    , M.Sc. Thesis Sharif University of Technology karvani, Mohsen (Author) ; Ranjbar, Ali Mohammad (Supervisor)
    Nowadays the growing demand for energy, and, on the other hand, the limited resources of fossil consuming energy in the world have caused the energy operation and consumption management to be taken into consideration much more than the past. Based on this background, improving the efficiency of feed conversion technologies in supplying the energy demanded by the consumers is the foremost and the most crucial solution to preventing energy loss. Another approach to reducing the losses through energy generation and transmission is the use of distributed energy generation systems in small scale. The advantages of applying this type of technology are the possibility of installing near the load... 

    Modeling Micro Combined Heat and Power System

    , M.Sc. Thesis Sharif University of Technology Gholizadeh Touchaei, Ali (Author) ; Saidi, Mohammad saeid (Supervisor) ; Shafii, Mohammad Behshad (Supervisor) ; Saeedi, Mohammad Hassan (Supervisor)
    Micro combined heat and power (MCHP) system is one of the most worldwide considered energy saving with high total efficiency systems. This research presents the application of MCHP to small scale users such as residential or light commercial buildings. Initially, the available technology in micro scale that can be used as an energy generator has been specified and categorized. Since then, by using the overall energy purchased cost by households assuming the energy carriers are kerosene, gas and electricity, total demand has been determined considering that the electricity expenses showing the use of electric appliances and the gas expenses expressing the cost of domestic hot water and... 

    Simulation and Building a Self-Cleaning/Cooling Solar Panel System

    , M.Sc. Thesis Sharif University of Technology Salari, Ali (Author) ; Hakkaki-Fard, Ali (Supervisor)
    Nowadays by fast growing the population and development of countries, the demand of energy is increasing rapidly. Solar energy is one of the most reliable and environment friendly source of energy. Photovoltaic modules (PV) are such a solar systems that is able to convert solar energy into electrical energy. However, some parameters such as increasing cell temperature and dust accumulation can reduce the PV modules efficiency. Increasing the cell temperature reduce the capability of electrical production of cells and dust accumulation is an obstacle for solar radiation absorption. As a result, in this research tempt to solve these problems by building a new device for PV modules. In this... 

    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... 

    Conceptual Inspection of a Micro-Combined Cooling, Heating and Power Systems for Ships

    , M.Sc. Thesis Sharif University of Technology Salmani, Amir (Author) ; Abbaspour, Madjid (Supervisor) ; Saeedi, Mohammad Hassan (Co-Advisor)
    Internal combustion (IC) engines are the major source of motive power in the ships. as the severity of the energy dearth and environmental pollution, different researches try to increase the total efficiency and reduce emissions. one of the improvable method is to get waste heat energy and reuse it to produce electricity, cooling and heating. studies of energy balance for marine diesel engine shows that there is potential to recovery waste heat from these motors. in this study a combined electricity, cooling and heating system based on regenerative Rankine cycle with an open feedwater heater and with two open feedwater heater and absorption refrigeration cycle is offered to recover the... 

    Technical and economic feasibility study of using Micro CHP in the different climate zones of Iran

    , Article Energy ; Volume 36, Issue 8 , August , 2011 , Pages 4790-4798 ; 03605442 (ISSN) Teymouri Hamzehkolaei, F ; Sattari, S ; Sharif University of Technology
    The growing worldwide demand for less polluting shapes of energy have led to a renewed interest in the use of Micro Combined Heat and Power (Micro CHP) technologies in the residential sector. Micro CHP have been introduced around Iran recently, and expected to diffuse more and more.In this paper, technical and economic studies for the use of Micro CHP in the different climate zones of Iran are executed. These zones are categorized in to five; Tehran, Rasht, Bandar Abbas, Ardebil and Yazd, based on weather conditions. Later on using an economic model, both annual energy savings and percentage of system profitability in each zone are calculated as well as reduction in annual emissions. It... 

    Technical, economic and environmental optimization of combined heat and power systems based on solid oxide fuel cell for a greenhouse case study

    , Article Energy Conversion and Management ; Volume 164 , 2018 , Pages 144-156 ; 01968904 (ISSN) Roshandel, R ; Golzar, F ; Astaneh, M ; Sharif University of Technology
    Elsevier Ltd  2018
    The aim of this paper is to investigate the application of solid oxide fuel cell (SOFC) as the prime mover of a combined heat and power (CHP) system. In this paper, four hybrid systems are proposed to improve the performance of CHP and compare with baseline condition. Capacity design and operation strategy of hybrid systems are applied to a case study of a greenhouse located in Mahabad, Iran and optimized by using technical, economic and environmental objective functions. Levelized cost of energy (LCOE) and CO2 emission rate are considered as the objective functions. For LCOE optimization, three scenarios are considered to evaluate the impacts of future energy prices and CO2 tax. In scenario... 

    Assessing operational flexibility of microgrids considering electrical and thermal energy resources

    , Article 2019 Smart Gird Conference, SGC 2019, 18 December 2019 through 19 December 2019 ; 2019 ; 9781728158945 (ISBN) Hadi, M. B ; Moeini Aghtaie, M ; Sharif University of Technology
    Institute of Electrical and Electronics Engineers Inc  2019
    With high growth rate of demand for energy in different societies, the need for energy resources has been increased significantly. This has resulted in introduction of new energy resources, i. e. renewable energy resources in generation sector of energy systems. However, the intrinsic features of these energy resources call for higher flexibility in different sectors of energy systems. Flexibility in a comprehensive sense tries to cover the amount of imbalance between production and demand in energy systems. This paper has attempted to introduce the concept of operational flexibility in microgrids and it also has presented a step-by-step algorithm to assess this operational index based on a... 

    Experimental Investigation of the Effect of Nano-Fluid on the Performance of Pulsating Heat Pipe

    , M.Sc. Thesis Sharif University of Technology Mohammadi, Maziar (Author) ; Saeedi, Mohammad Hassan (Supervisor) ; Kazemzadeh Hannani, Siamak (Supervisor) ; Shafii, Behshad (Supervisor)
    Improving efficiency of heat exchangers has always been an important concern for the industry. Pulsating Heat Pipes (PHPs) are novel and efficient technology in the field of heat transfer. PHPs are widely used in solar water heaters, solar desalination systems, etc. In this research, thermal performance of Open Loop Pulsating Heat Pipes (OLPHPs) using three different ferrofluids (ferrofluid without surfactant and nanoparticles’ coating, ferrofluid with coating of nanoparticles, and ferrofluid with surfactant) is experimentally investigated. In addition, effects of charging ratio (20, 40, 60, and 80%), heating power (20, 30, 40, 50, 60, 70, 80, 100, 120, 140, 160, 180, 200, 240, 280, 320,... 

    Visualization of Flow Pattern and Experimental investigation of Thermal Performance in a FerroFluid Charged Pulsating Heat Pipe

    , M.Sc. Thesis Sharif University of Technology Dayanim, Pantea (Author) ; Shafii, Mohammad Behshad (Supervisor)
    Nowadays, there is rapid development of practical engineeringsolutions to a multitude ofheating problems. Heat generated inmicro-devices used in manufacturing and electronics require specialsolutions. Pulsating Heat Pipes (PHPs) are novel and efficient technology in the field of heat transfer and previous researches show that using ferrofluid (magnetic nanofluid) in Pulsating Heat Pipes (PHPs) enhances the thermal performance in comparison with the case of distilled water under certain conditions by applying magnetic fields and the performance is dramatically improved at horizontal heating mode. In this research an experimental setup for visualizing two phase flows in a flat-plate Pulsating... 

    A Real Option Model to Evaluate Investments in Combined Heat and Power (CHP)Projects

    , M.Sc. Thesis Sharif University of Technology Abdi Nian, Farzad (Author) ; Haj Kazem Kashani, Hamed (Supervisor)
    Cogeneration technologies such as Combined Heat and Power (CHP) have promising features for providing the electrical energy that various industries require while reducing the emissions and other environmental impacts of these industries. Investments in CHP systems require substantial implementation costs followed by a relatively long period of recovering the invested capital through savings in utilities bills. Appropriate timing of CHP system investments can reduce capital expenses and enhance returns on investments. An appropriate investment valuation method is needed to identify the appropriate time to implement a given CHP system and to find the values of properly scheduled investments.... 

    Experimental Investigation of Paraffin Nano-encapsulated Phase Change Material on Heat Transfer Enhancement of Pulsating Heat Pipe

    , M.Sc. Thesis Sharif University of Technology Heydarian, Gholamreza (Author) ; Shafii, Mohammad Behshad (Supervisor) ; Rezaee Shirin-Abadi, Abbas ($item.subfieldsMap.e) ; Ghasempour, Roghayeh ($item.subfieldsMap.e)
    In this study, a mixture of nano-encapsulated phase change materials in water has been used as a working fluid in a pulsating heat pipe in order to investigate its thermal performance. The results of the experiments showed that using the nano-encapsulated paraffin dispersed in water as working fluid improves heat transfer and decreases the thermal resistance of the pulsating heat pipe. On the other hand, there is an optimal concentration among tested concentrations for nano-encapsulated paraffin, in which increasing its concentration due to the increased dynamic viscosity of the fluid causes an increase in the thermal resistance of the pulsating heat pipe. Enhancement in the thermal...