Show/Hide Menu
Hide/Show Apps
Logout
Türkçe
Türkçe
Search
Search
Login
Login
OpenMETU
OpenMETU
About
About
Open Science Policy
Open Science Policy
Open Access Guideline
Open Access Guideline
Postgraduate Thesis Guideline
Postgraduate Thesis Guideline
Communities & Collections
Communities & Collections
Help
Help
Frequently Asked Questions
Frequently Asked Questions
Guides
Guides
Thesis submission
Thesis submission
MS without thesis term project submission
MS without thesis term project submission
Publication submission with DOI
Publication submission with DOI
Publication submission
Publication submission
Supporting Information
Supporting Information
General Information
General Information
Copyright, Embargo and License
Copyright, Embargo and License
Contact us
Contact us
Enhancement of the bottoming cycle in a gas/steam combined cycle power plant
Date
2005
Author
Safyel, Zerrin
Metadata
Show full item record
Item Usage Stats
162
views
0
downloads
Cite This
A combined cycle gas/steam power plant combines a gas turbine (topping cycle) with a steam power plant (bottoming cycle) through the use of a heat recovery steam generator. It uses the hot exhaust of the gas turbine to produce steam which is used to generate additional power in the steam power plant. The aim of this study is to establish the different bottoming cycle performances in terms of the main parameters of heat recovery steam generator and steam cycle for a chosen gas turbine cycle. First of all; for a single steam power cycle, effect of main cycle parameters on cycle performance are analyzed based on first law of thermodynamics. Also, case of existence of a reheater section in a steam cycle is evaluated. For a given gas turbine cycle, three different bottoming cycle configurations are chosen and parametric analysis are carried out based on energy analysis to see the effects of main cycle parameters on cycle performance. These are single pressure cycle, single pressure cycle with supplementary firing and dual pressure cycle. Also, effect of adding a single reheat to single pressure HRSG is evaluated. In single pressure cycle, HRSG generates steam at one pressure level. In dual pressure cycle, HRSG generates steam at two different pressure levels. i.e. high pressure and low pressure. In single pressure cycle with supplementary firing excess oxygen in exhaust gas is fired before entering HRSG by additional fuel input. So, temperature of exhaust gas entering the HRSG rises. Second law analysis is performed to able to see exergy distribution throughout the bottoming plant; furthermore second law efficiency values are obtained for single and dual pressure bottoming cycle configurations as well as basic steam power cycle with and without reheat. It is shown that maximum lost work due to irreversibility is in HRSG for a bottoming cycle in a single pressure gas /
Subject Keywords
Steam engineering.
URI
http://etd.lib.metu.edu.tr/upload/2/12605896/index.pd
https://hdl.handle.net/11511/14813
Collections
Graduate School of Natural and Applied Sciences, Thesis
Suggestions
OpenMETU
Core
A Multi-source Micro Power Generator Employing Thermal and Vibration Energy Harvesting
Toreyin, Hakan; Topal, Emre; Külah, Haluk (2010-09-08)
This paper introduces a new cantilever type multi-source energy harvester generating electric power from both ambient heat and vibration. Harvesting energy from vibration was realized by electromagnetic conversion, whereas the energy generation from heat was supplied by making use of Seebeck effect of Cr-Al thermocouples implemented on the microcantilevers. The measured average Seebeck coefficient is 12 mu V/K per thermocouples. A total voltage of 3.3 mV was generated from the thermoelectric part and 13.4 m...
Development of ceria and tungsten promoted nickel/alumina catalysts for steam reforming of diesel
Bozdag, A. Arslan; Kaynar, A. D. Deniz; Doğu, Timur; Sezgi, Naime Aslı (Elsevier BV, 2019-12-01)
Use of diesel fuel for on-board hydrogen production for auxiliary power units (APUs) through diesel steam reforming (DSR) reaction is a promising route. Coke minimization for cheap and active Ni/Al2O3 catalyst is necessary for long term operation in DSR reaction. Coke minimization with high hydrogen productivity can be accomplished through the optimization of operating conditions and promoting the Ni/Al2O3 catalyst with ceria (CeO2) and tungsten (W) which attracts attention with their coke resistive propert...
Evaluation of hybridsolar-wind-hydrogenenergy system based on methanol electrolyzer
Budak, Yagmur; DEVRİM, YILSER (Wiley, 2020-10-01)
In this study, it is aimed to meet the annual electricity and heating needs of a house without interruption with the photovoltaic panel, wind turbine, methanol electrolyzer, and high temperature proton exchange membrane fuel cell system. The system results show that the use of the 2 WT with 18 PV was enough to provide the need of the methanol electrolyzer, which provides requirements of the high temperature proton exchange membrane fuel cell. The produced heat by the fuel cell was used to meet the heat requ...
OPTIMAL CONTROLLER DESIGN FOR SPEED GOVERNORS OF HYDROELECTRIC POWER PLANT
Altinoz, Okkes Tolga; KOŞALAY, İLHAN; Gezer, Derya (VSB - Technical University of Ostrava, 2020-06-01)
Speed governors have critical importance on hydroelectric power plants, which are adjusted to the rotating speed of hydroelectric generation based on load demand of the grid. The rotating speed is the main factor to balance power generation and load demand. The well-designed controller is needed to control speed governors with high accuracy. A well-defined model is needed to obtain desired control structure. Therefore, in this study, initially, the mathematical model of a hydroelectric power plant is obtain...
Design and optimization of high torque density generator for direct drive wind turbine applications
Zeinali, Reza; Ertan, Hulusi Bülent; Department of Electrical and Electronics Engineering (2016)
In this thesis, it is aimed to design a high torque density generator for a variable speed, direct drive wind turbine application. Such a generator may reduce the size of the turbine tower and the nacelle and may provide cost advantage. For this purpose, various topologies of the permanent magnet machines in the literature are reviewed. Among the reviewed electrical machines, a magnetically geared machine introduced as a concept with high torque density and high power factor is chosen to be evaluated for th...
Citation Formats
IEEE
ACM
APA
CHICAGO
MLA
BibTeX
Z. Safyel, “Enhancement of the bottoming cycle in a gas/steam combined cycle power plant,” M.S. - Master of Science, Middle East Technical University, 2005.