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Retrofitting a steam power cycle by using water from the interstage feed water pump as reheat spray
, Article ASME Power Conference 2008, Lake Buena Vista, FL, 22 July 2008 through 24 July 2008 ; July , 2008 , Pages 23-30 ; 9780791848326 (ISBN) ; Irani Rahaghi, A ; Mousavi, M. S ; Power Division, ASME ; Sharif University of Technology
2008
Abstract
Various methods are used in thermal power plants to adjust the superheated or reheated steam temperature to a pre-determined set point, including flue gas recirculation, using tilting burners and spray of water from discharge of feed water pump, etc. In this paper, an innovative method is presented to control the reheater temperature by tapping water from an interstage of the feed water pump to control reheater temperature at the Bisotoun Power Plant (a steam cycle based power plant in the western Iran). The spray water for the superheaters is secured from the discharge of feed water pump, but interstage water, instead of gas recirculation or using tilting burner, is used to control the...
Simulation, Integration, Optimization of Conversion of Natural Gas to Olefins by Methanol Production Process with ASPEN PLUS and GAMS Softwares
, M.Sc. Thesis Sharif University of Technology ; Rashtchian, Davoud (Supervisor) ; Sharifzadeh, Mahdi (Supervisor)
Abstract
Considering the supply and demand market of natural gas, methanol, propylene and ethylene and the propylene value chain, it is expected that the design of the propylene production process from methanol produced from natural gas and its implementation in Iran country can significantly flourish the production of polypropylene, acrylonitrile and Etc. On the other hand, with the industrialization of this process, the uncontrolled export of methanol from Iran to countries such as China and the devaluation of methanol will be prevented. In this report, the process of producing synthetic gas from natural gas using autothermal reactor and heat exchange reforming, separation and storage of carbon...
Thermodynamic optimization of design variables and heat exchangers layout in HRSGs for CCGT, using genetic algorithm
, Article Applied Thermal Engineering ; Volume 29, Issue 2-3 , 2009 , Pages 290-299 ; 13594311 (ISSN) ; Shayegan, J ; Sharif University of Technology
2009
Abstract
The heat recovery steam generator (HRSG) is one of the few equipments that are custom made for combined cycle power plants, and any change in its design affects all performance parameters of a steam cycle directly. Thus providing an optimization tool to optimize its design parameters and the layout of its heat exchangers is of great importance. A new method is introduced for modeling a steam cycle in advanced combined cycles by organizing non-linear equations and their simultaneous solutions by use of the hybrid Newton methods in this article. Thereafter, optimal thermodynamic performance conditions for HRSGs are calculated with the help of the genetic algorithm. In the conclusion, the...
Economic feasibility of CO2 capture from oxy-fuel power plants considering enhanced oil recovery revenues
, Article Energy Procedia, 19 September 2010 through 23 September 2010 ; Volume 4 , September , 2011 , Pages 1886-1892 ; 18766102 (ISSN) ; Soltanieh, M ; Saboohia, Y ; Arab, M ; Sharif University of Technology
2011
Abstract
Considering the dramatic increase of greenhouse gases concentration in the atmosphere, especially carbon dioxide, reduction of these gases seems necessary to combat global warming. Fossil fuel power plants are one of the main sources of CO2 emission and several methods are under development to capture CO2 from power plants. In this paper, CO2 capture from a natural gas fired steam cycle power plant using oxyfuel combustion technology is studied. Oxy-fuel combustion is an interesting option since CO2 concentration in the flue gas is highly increased. The Integrated Environmental Control Model (IECM) developed by Carnegie Mellon University (USA) is used to evaluate the effect of this capture...