Search for: energy-demands
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    Energy demand model of the household sector and its application in developing metropolitan cities (case study: Tehran)

    , Article Polish Journal of Environmental Studies ; Volume 22, Issue 2 , February , 2013 , Pages 319-329 ; 12301485 (ISSN) Abbaspour, M ; Karbassi, A ; Asadi, M. K ; Moharamnejad, N ; Khadivi, S ; Moradi, M. A ; Sharif University of Technology
    Excessive energy consumption is one of the serious problems of large cities in Iran. In order to avoid unreasonable growth in energy use as well as conservation of natural resources, more attention should be paid to energy consumption patterns in metropolitan cities. Accordingly, the current study aims at analyzing energy demand and its related pollutants in the household sector in Tehran Metropolitan. The study includes a discussion of past trends and future scenarios to reduce greenhouse gas emissions in this sector. Using LEAP software and according to Iran's long-term development policies, energy demand and its greenhouse gas emissions were evaluated based on a baseline scenario within a... 

    Shortcut design of reactive distillation columns

    , Article Chemical Engineering Science ; Volume 71 , 2012 , Pages 166-177 ; 00092509 (ISSN) Avami, A ; Marquardt, W ; Saboohi, Y ; Kraemer, K ; Sharif University of Technology
    Shortcut design methods can be valuable tools for rapid screening of different separation process alternatives to assess feasibility and determine minimum energy demand. This work presents a variant of the feed angle method (Kraemer et al., 2011), which applies to single- and double-feed reactive distillation columns. The proposed method relies on pinch point analysis and determines the minimum energy demand from the calculation of a tray at the feed pinch. It is fully algorithmic and insensitive to impurities in product specifications. Its validity and performance is illustrated by a variety of case studies covering multi-component and multi-reaction systems, mixtures with potential... 

    An Optimized Operation Strategy for a Solar Assisted CCHP System Based on Minimum Distance Methodology

    , M.Sc. Thesis Sharif University of Technology Ghasemi, Ghodratollah (Author) ; Roshandel, Ramin (Supervisor)
    CCHP systems have attracted much attention in recent decades due to their economic and environmental benefits and high returns. Therefore, in this research due to the necessity of using high energy efficiency technologies and low cost of operation while also releasing minimum environmental pollutants such as carbon dioxide, a Solar-assisted CCHP system is studied. The performance of the CCHP systems is deeply dependent on the operation strategy of the system. In this research, in order to improve the techno-economic performance of the system, an optimization model is applied to optimize the proposed operation strategy using minimum distance methodology. In order to measure the proposed... 

    Development of a Model for Evaluation of Energy Resources and the Interaction between Energy and Economy

    , Ph.D. Dissertation Sharif University of Technology Adel Barkhordar, Zahra (Author) ; Saboohi, Yadollah (Supervisor)
    To study the interaction between energy sector and the Iranian economy, an energy-economy model has been developed which itself is a part of an integrated model of Energy Planning Support System (EPSS). The model is a dynamic computable general equilibrium (DCGE) model which evaluates the medium to long-term economic developments through investment decisions. Four groups of economic agents have been considered: households, firms, governments and foreign sectors. The economic behavior of each agent along with the institutional links among them has been modeled based on neoclassical theory of general equilibrium. Therefore, the model simulates the working of a market economy and solves for a... 

    Cost-benefit analysis of energy saving strategies adopted by the commercial sector in Tehran

    , Article Environmental Progress and Sustainable Energy ; Volume 34, Issue 3 , 2015 , Pages 850-857 ; 19447442 (ISSN) Khadivi, S ; Moradi, M. A ; Sharif University of Technology
    John Wiley and Sons Inc  2015
    This study presents a cost-benefit analysis of energy saving strategies for the commercial sector inTehran City. The article includes a discussion of the estimated energy demand for various energy saving scenarios. The cost-benefit analysis was performed separately for seven energy-saving scenarios based on the energy demand and supply forecasting model. According to which, energy demand of the commercial sector was considered as final consumption, which is a function of different parameters such as number of commercial units, number of electric vehicles, volume of commercial activities, labor force, etc. The research findings indicated that all of the proposed scenarios are economically... 

    A hybrid stochastic model based bayesian approach for long term energy demand managements

    , Article Energy Strategy Reviews ; Volume 28 , 2020 Ahmadi, S ; Fakehi, A. H ; vakili, A ; Haddadi, M ; Iranmanesh, H ; Sharif University of Technology
    Elsevier Ltd  2020
    In this study, a hybrid stochastic model (BScA model) using Bayesian approach and scenario analysis to forecast long term energy demand is developed. The main objective of this study is to design and develop a model for energy analysis in demand side and describe the energy saving and GHG reduction potential on the other. For this, total energy demand is selected as the response variable and primary energy production, population, GDP and natural gas and gasoline prices are chosen as covariates. Also, Political drivers, economic drivers, social-environmental and technological drivers are the key driving forces for scenario development. After interview and ranking the drivers, we have built... 

    Study of Caspian Energy Markets with Respect the Energy Demand Security of Caspian Countries

    , M.Sc. Thesis Sharif University of Technology Vedadi Kalantar, Saeed (Author) ; Maleki, Abbas (Supervisor)
    The promotion of oil and gas industry of a country or region requires foreign and long-term investments. Ensuring the security of demand is one of the major driving forces for increasing investments in oil and gas sectors.The status of the Caspian markets in terms of energy demand security is the main issue in this study. Just like security of supply, security of energy demand will not be affected by economic logic alone, but the combination of various factors should be considered; So in this study Combined criteria was developed.According to the horizons of policy making for the energy export of Caspian, 2015 year as the recent past, 2020 as the medium-term and 2030 as the long-term have... 

    The effect of soil-structure interaction on hysteretic energy demand of buildings

    , Article Structural Engineering and Mechanics ; Volume 24, Issue 5 , 2006 , Pages 641-645 ; 12254568 (ISSN) Nakhaei, M ; Ghannad, M. A ; Sharif University of Technology
    Techno-Press  2006
    The effect of soil-structure interaction (SSI) on hysteresis energy demand of buildings using an ensemble of alluvium site records was investigated. The structure and the soil were molded separately and then combined to constitute the soil-structure model using the sub-structure method. The key parameters effecting the response of the soil-structure system were found to be a non-dimensional frequency as a representative of structure to soil stiffness ratio; and aspect ratio of the building. It was found that the hysteric energy dissipated in a structure under an earthquake can be highly effected when the stiffness of the soil beneath the structure is altered  

    Modeling and Design of CCHP System for Sharif Energy Research Institute

    , M.Sc. Thesis Sharif University of Technology Rasekhi Kazerooni, Hussein (Author) ; Sabbohi, Yadollah (Supervisor)
    The aim of the present research project has been techno-economical analysis of using a CCHP (Combined Cooling Heating and Power) technology at the building of Sharif Energy Research Institute (SERI). The CCHP at SERI is supposed to supply energy required at the building. Useful energy demand at the building include heating in winter, cooling and air conditioning in summer, lighting and power requirement of electric appliance and equipments. Since there are many technologies that could be utilized as CCHP, an optimal model of energy supply system of the building has been developed in order to identify the most appropriate technology. The application of model has enabled techno logical... 

    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... 

    Development of a Demand Side Management Model for an Educational Building

    , M.Sc. Thesis Sharif University of Technology Haddadi, Amir Hossein (Author) ;
    Building sector is one of the largest energy conumers by being responsible for 40% of final energy consumption worldwide. In Iran, buildings consume around 32.5% of natural gas and 51.6% of generated electricity which is a significant portion of national energy system. Energy management consists of solutions which minimise energy consumption of a building while maintaining comfort conditions. The present research studies energy management solutions under a short–term model for an educational building using Energy-Plus software. The Department of Energy Engineering of Sharif University of Technology is selected as the case study and the optimal solutions has been achieved for this building.... 

    Technical and Economic Evaluation Model for Sustainable Combining of Diverse Technologies for Optimized Supplying of Water, Energy and Feed in Greenhouse

    , M.Sc. Thesis Sharif University of Technology Hezarkhani, Mohammad Hossein (Author) ; Saboohi, Yadollah (Supervisor)
    One of the ways to solve the problem of water scarcity in the agricultural sector is the development of the greenhouse. Using greenhouse and control of its internal conditions can increase productivity and reduce water consumption. But the issue that needs to be noted is higher energy consumption in greenhouses in comparison to traditional agriculture. The purpose of the present research is to evaluate the various technologies of supplying water and energy with a view to the climate, type of equipment and economic parameters. An analytical tool for designing and operation of the greenhouse have been developed and presented that may be applied in greenhouse sector. It is possible to evaluate... 

    Optimal Design and Operation of Energy Supply Systems of Energy Efficient Greenhouses Based on Dual Stage Multi-objective Optimization

    , Ph.D. Dissertation Sharif University of Technology Golzar, Farzin (Author) ; Roshandel, Ramin (Supervisor) ; Hellweg, Stefanie (Co-Supervisor)
    The purpose of this research is developing an analytical and decision-making tool that examines the interactions between greenhouse energy demand and yield production. Greenhouseholders can use the analytical tool to design and operate existintg and newly built greenhouses in an optimal way. Becides, the decision making tool helps planners and policymakers to improve the performance of greenhouses and extend greenhouse cultivation with respect to their economic or environmental objectives.In order to develop this decision making tool, existing models for greenhouses have been investigated and various algorithms have been combined to develop an integrated energy demand-plant growth model. The... 

    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... 

    Planning of Energy Storage Systems in the Restructured Environment by Considering Uncertainties

    , M.Sc. Thesis Sharif University of Technology Barkom, Ehsan (Author) ; Ehsan, Mahdi (Supervisor)
    Energy storage is a pivotal technology to dealing with increasing demand for reliability and challenges of renewable energy integration. This thesis provides a benders decomposition framework for expansion studies of energy storage systems (ESSs) in high wind penetrated power system and uncertainties of wind farms expansion and wind speed. This work proposes probabilistic and robust approaches to determine the optimal location and size of storage devices to reduse wind curtailment. The proposed methodologies are implemented on the modified IEEE 73-bus test system and their anticipated applicability are compared to each other and well verified  

    Presenting a New Model for Planning Studies of a Multi-energy Microgrid to Achieve a Low-carbon Society

    , M.Sc. Thesis Sharif University of Technology Nasiri, Tohid (Author) ; Moeini Aghtaie, Moein (Supervisor)
    With the growing population and the development of human societies, the demand for energy increases. And it is expected that for the next few decades, fossil fuels will continue to be recognized as the main sources of energy supply and used to meet energy demand. One of the biggest disadvantages of fossil fuel consumption is the emission of greenhouse gases such as carbon dioxide, which raises the Earth's temperature and has devastating effects on the climate and the lives of its inhabitants. On the other hand, fossil fuels are recognized as non-renewable sources and their lifespan is only for the next few decades. Today, one of the major concerns of societies, especially in developed... 

    Demand Estimation of Natural Gas

    , M.Sc. Thesis Sharif University of Technology Seyedi, Salar (Author) ; Rahmati, Mohammad Hossein (Supervisor) ; Vesal, Mohammad (Supervisor)
    The provision of developmental infrastructure by governments and their various effects on the lives of citizens has always been the subject of discussion among researchers and policymakers. In particular, the infrastructure associated with access to modern energies causes changes in household economic behavior. The effects of pipeline gas connection on household behavior is the main subject of this research. By using micro level data, these effects compare the behavior of beneficiary households and lack of natural gas. The data includes households living in the entire geographical zone of Iran and between 1377 and 1394. First, we show that natural gas is a direct substitute for liquid fuels... 

    A hierarchical artificial neural network for transport energy demand forecast: Iran case study

    , Article Neural Network World ; Volume 20, Issue 6 , 2010 , Pages 761-772 ; 12100552 (ISSN) Kazemi, A ; Shakouri, H .G ; Menhaj, M. B ; Mehregan, M. R ; Neshat, N ; Asgharizadeh, E ; Taghizadeh, M. R ; Sharif University of Technology
    This paper presents a neuro-based approach for annual transport energy demand forecasting by several socio-economic indicators. In order to analyze the influence of economic and social indicators on the transport energy demand, gross domestic product (GDP), population and total number of vehicles are selected. This approach is structured as a hierarchical artificial neural networks (ANNs) model based on the supervised multi-layer perceptron (MLP), trained with the back-propagation (BP) algorithm. This hierarchical ANNs model is designed properly. The input variables are transport energy demand in the last year, GDP, population and total number of vehicles. The output variable is the energy... 

    A design procedure for the assessment of carbon capturing and utilization of flue gas from power plant using experimental data

    , Article Chemical Engineering Research and Design ; 2017 ; 02638762 (ISSN) Rostami Dehjalali, F ; Avami, A ; Sharif University of Technology
    Institution of Chemical Engineers  2017
    The high dependence of the atmospheric carbon dioxide emissions on fossil fuels has led it to increment. Process design along with the economic aspects, improves the technology diffusion of the carbon capturing. In the pressure swing adsorption as a promising carbon capturing technology, increasing the pressure leads to more adsorbed amount of carbon dioxide and energy consumption of compressor, which is a source for carbon dioxide emission. Experimental data shows that for pressures between 3 to 5bar, the avoided CO2 is in maximum rate. The economic analysis reveals that the pressure of 3bar is appropriate. Also, the utilization of CO2 in the aerogel production, as a nano-based thermal... 

    A novel integrated framework to evaluate greenhouse energy demand and crop yield production

    , Article Renewable and Sustainable Energy Reviews ; Volume 96 , 2018 , Pages 487-501 ; 13640321 (ISSN) Golzar, F ; Heeren, N ; Hellweg, S ; Roshandel, R ; Sharif University of Technology
    Elsevier Ltd  2018
    Greenhouses are complex systems that require considerable amounts of energy. In order to optimize their performance, it is necessary to reduce the amount of energy per unit of crop produced. This requires a combined assessment of greenhouse energy balance and crop growth, as well as their interaction. In this work, more than 30 existing greenhouse models are reviewed and different algorithms are combined to propose an integrated energy-yield model. The physical model of greenhouse energy demand is based on the dynamic energy and mass balance while yield production is based on a physiological crop model. The integrated model is validated with observed energy demand and crop yield datasets...