Relevant bibliographies by topics / Design of flue-gas duct

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Design of flue-gas duct'

Author: Grafiati
Published: 4 June 2021
Last updated: 1 February 2022

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Journal articles on the topic "Design of flue-gas duct"

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Ramsunkar, Charlene, Chris van Tonder, and Walter Schmitz. "Errors Associated With Excess Air Multipoint Measurement Systems." Chemical and Process Engineering 36, no. 4 (December 1, 2015): 405–23. http://dx.doi.org/10.1515/cpe-2015-0029.

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Abstract Boiler combustion air is generally controlled by the excess air content measured at the boiler economiser outlet using oxygen (O2) analysers. Due to duct geometry and dimensions, areas of high and low O2 concentrations in the flue gas duct occur, which poses a problem in obtaining a representative measurement of O2 in the flue gas stream. Multipoint systems as opposed to single point systems are more favourable to achieve representative readings. However, ash blockages and air leakages influence the accuracy of O2 measurement. The design of multipoint system varies across ESKOMs’ Power Stations. This research was aimed at evaluating the accuracy of the multipoint oxygen measurement system installed at Power Station A and to determine the systematic errors associated with different multipoint systems designs installed at Power Stations' A and B. Using flow simulation software, FloEFDTM and Flownex®, studies were conducted on two types of multipoint system designs This study established that significantly large errors, as high as 50%, were noted between the actual and measured flue gas O2. The design of the multipoint system extraction pipes also introduces significant errors, as high as 23%, in the O2 measured. The results indicated that the sampling errors introduced with Power Station A’s system can be significantly reduced by adopting the sampling pipe design installed at Power Station B.
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Deng, Jia-jia, Liang-ming Pan, De-qi Chen, Yu-quan Dong, Cheng-mu Wang, Hang Liu, and Mei-qiang Kang. "Numerical simulation and field test study of desulfurization wastewater evaporation treatment through flue gas." Water Science and Technology 70, no. 7 (August 26, 2014): 1285–91. http://dx.doi.org/10.2166/wst.2014.359.

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Aimed at cost saving and pollution reduction, a novel desulfurization wastewater evaporation treatment system (DWETS) for handling wet flue gas desulfurization (WFGD) wastewater of a coal-fired power plant was studied. The system's advantages include simple process, and less investment and space. The feasibility of this system has been proven and the appropriate position and number of nozzles, the spray droplet size and flue gas temperature limitation have been obtained by computational fluid dynamics (CFD) simulation. The simulation results show that a longer duct, smaller diameter and higher flue gas temperature could help to increase the evaporation rate. The optimal DWETS design of Shangdu plant is 100 μm droplet sprayed by two nozzles located at the long duct when the flue gas temperature is 130 °C. Field tests were carried out based on the simulation results. The effects of running DWETS on the downstream devices have been studied. The results show that DWETS has a positive impact on ash removal efficiency and does not have any negative impact on the electrostatic precipitator (ESP), flue gas heat exchanger and WFGD. The pH values of the slurry of WFGD slightly increase when the DWETS is running. The simulation and field test of the DWETS show that it is a feasible future technology for desulfurization wastewater treatment.
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Kurkus-Gruszecka, Michalina, Piotr Krawczyk, and Janusz Lewandowski. "Numerical Analysis on the Flue Gas Temperature Maintenance System of a Solid Fuel-Fired Boiler Operating at Minimum Loads." Energies 14, no. 15 (July 22, 2021): 4420. http://dx.doi.org/10.3390/en14154420.

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Currently, energy policy is associated with the increase in the share of renewable sources in systemic energy production. Due to this trend, coal-fired power units must increase their work flexibility. Adapting a coal power plant to work with a lower load often causes the issue of maintaining the temperature before the selective catalytic reduction (SCR) installation at a sufficiently high level. This paper presents a CFD analysis of the mixing area of two flue gas streams before the SCR installation with various methods for mixing flue gas streams. The novelty of the work is mixing the flue gas streams of different temperatures using a flap shape developed by the authors. A series of numerical simulations were performed to develop the location and method of introducing the higher temperature gas, obtaining a uniform distribution of the exhaust gas temperature. The simulation scheme was applied to a series of geometrical modifications of the boundary conditions. The tested solution using only a single, straight flap in the flue gas duct allows the amplitude to be reduced from 298 K to 144 K. As a result of the research, a mixing flap design was developed to reduce the initial temperature amplitude of the flue gas streams from 298 K to 43 K.
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Wang, Jia Qiong, and Fan Yu Kong. "Study Analysis on Purification of Alumina Electrolytic Flue Gas by Bag Filter." Applied Mechanics and Materials 130-134 (October 2011): 904–7. http://dx.doi.org/10.4028/www.scientific.net/amm.130-134.904.

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To improve the shortcoming in bag filter design in China (mainly used in purification of HF in alumina electrolytic flue gas), necessity of basic theoretical study on bag-filter used in purification of alumina electrolytic flue gas is analyzed. Four study aspects are proposed , which includs flow field optimization, influences of bag length and process parameter on forming dust layer, properties of the dust layer adsorbing hydrogen. Some primary study is done. This will provide a reference for engineering design and process operation.
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Xing, Futang, Yuheng Li, Dan Mei, Shunfeng Gui, and Liya Wang. "Optimized design for heavy mound venturi." Thermal Science 21, no. 4 (2017): 1873–78. http://dx.doi.org/10.2298/tsci161201102x.

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The venturi scrubber is one of the most efficient gas cleaning devices for removal of contaminating particles in industrial flue-gas purification processes. The velocity of the gas entering the scrubber is one of the key factors influencing its dust-removal efficiency. In this study, the shapes of the heavy mound and tube wall are optimized, allowing the girth area to become linearly adjustable. The resulting uniformity of velocity distribution is verified numerically.
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Rumyantsev, D. V., L. V. Krupnov, R. V. Starykh, R. A. Marchuk, and V. B. Fomichev. "Using shell-type tuyeres at Pierce–Smith horizontal converters of the Nadezhda Metallurgical Plant." Izvestiya Vuzov Tsvetnaya Metallurgiya (Universities Proceedings Non-Ferrous Metallurgy) 1, no. 1 (February 11, 2021): 16–27. http://dx.doi.org/10.17073/0021-3438-2021-1-16-27.

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Since 2015 the processing capacity reconfiguration at the Polar Branch of MMC Norilsk Nickel (hereinafter PB) sets new goals for conventional pyrometallurgical processes of smelting and converting. The design flowsheet of Kolesnikov Nadezhda Metallurgical Abstract: Plant (hereinafter NMP) provided for «cross-converting» when copper matte was first processed in one converter to produce blister copper followed by nickel matte processing to yield copper-nickel converter matte bypassing the discharge of dry coagulated slag. This flowsheet allowed for converter heat balance optimization, decreasing the formation of refractory reverts and significant extension of the converter campaign. PB Nickel Plant shutdown resulted in copper processing elimination at NMP and switching the converters to the conventional nickel converting flowsheet. In turn, it gave rise to the need for solutions to extend converter campaign while maintaining the possibility to process large amounts of nickel slag from the second converting stage at the PB Copper Plant. For this purpose the series of lab experiments were carried out to develop the technology and design documentation for the system to supply oxygen-enriched air (up to 45 %) to horizontal converters using shell-type tuyeres. In addition, literature data were analyzed on this topic along with the experience of smelters in this area. Process design calculations were done. The efforts were taken in cooperation with the PB engineering personnel and Laboratory of Pyrometallurgy of LLC «Gipronickel Institute». The use of reduced diameter shell-type tuyeres to inject the oxygen-air mixture was found to decrease the converter blowing and off-gas volumes. The decline in off-gas quantity leads to reduced heat load on the converter mouth and flue duct system, as well as to lowered converter dust entrainment. The use of oxygen-enriched blowing implies the higher smelt heating rate. Excess heat compensation requires timely charging of cold reverts and flux. In emergencies (if cold reverts are not available) the oxygen content of the blowing has to be reduced until switching over to air blowing. The series of the above efforts will offer a possibility to use the shell-type tuyeres keeping the converter off-gas temperature at the current level. Thus continuous monitoring and efficient control will ensure the off-gas temperature and volume at the inlets of gas cooling and cleaning systems not exceeding the limiting values. The introduction of the reduced diameter shell-type tuyeres for air-oxygen mixture injection does not require any upgrade of the existing gas cooling and cleaning systems. Moreover, switching to these tuyeres will reduce gas load on the flue duct system and heat load on the water-cooled dust cap, lower dust entrainment and non-recoverable dust losses after the gas cleaning system.
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Machnik, Ryszard, and Łukasz Więckowski. "Operational tests of an electrostatic precipitator reducing low dust emission from solid fuels combustion." Eksploatacja i Niezawodnosc - Maintenance and Reliability 23, no. 3 (July 5, 2021): 569–74. http://dx.doi.org/10.17531/ein.2021.3.18.

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The article presents the continuation of the research aimed at designing, manufacturing and selecting the operating parameters of the electrostatic precipitator for household applications. The tests were carried out in the laboratory and real conditions. The object of the research was a pre-production prototype of the electrostatic precipitator installed in the flue gas duct of a single-family building. The source of exhaust gases was a coal-fired, low-temperature water heating boiler with a nominal power of 21 kW (old generation boiler-year of production: 2007). The obtained results showed that the adopted design of the electrostatic precipitator enables the reduction of dust emissions generated in the combustion of solid fuels in households at relatively low operating costs.
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Yang, Li Jun. "Supervisory Control of Silicon Steel Plant Dust Removal System Based on Configuration Technology." Advanced Materials Research 756-759 (September 2013): 452–57. http://dx.doi.org/10.4028/www.scientific.net/amr.756-759.452.

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This paper introduces the real-time monitoring provided by the function of PLC control system based on the configuration control technology in silicon steel plant. Visual real-time monitoring of silicon steel flue gas dust removal system, the main parameters includes: working condition of the two temperature sensor in flue pipe, air conditioning butterfly valve, bag type dust trap system, high pressure fan, dust conveying system, dust unloading system and cleaning system, etc. Moreover, monitoring and give an alarm in case the failure of dust removal system appears appears in the course of their work. This paper also introduces the hardware components and software components of the visual real-time monitoring of silicon steel flue gas dust removal system, and their applications. And discuss how to use configuration technology develop and design real-time monitoring system.
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Meneses Chacón, Edxon Stiven, Julián Ernesto Jaramillo-Ibarra, and Elisabet Mas de les Valls. "Numerical analysis of the thermal and fluid dynamic behavior of the flue gases in a traditional furnace for panela production." INGE CUC 15, no. 1 (June 8, 2019): 133–41. http://dx.doi.org/10.17981/ingecuc.15.1.2019.12.

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Introduction: Panela is a product derived from sugar cane that is prepared using a traditional burner designed especially for this purpose. According to studies found in the literature, it was identified that the thermal efficiency of panela burners is 30% on average. Objective: The objective of this investigation is to contribute to the search for new alternatives for the improvement of the low efficiency present on these systems, mainly affecting the flue gases duct. Methodology: The development of this study is as follows: first, a research of the radiation and optical thickness effect in a simplified furnace is carried out. Afterward, a series of simulations with modifications in the design of the flue gas duct for a real size furnace are analyzed. Results: The results showed that the radiation effect must be considered and, even though the optical thickness is low, it has a relevant impact in the heat transfer process due to the high temperatures in the furnace. A chaotic movement of the gases implied more heat transferred to the heaters and high values of Nusselt with the addition of new elements in the duct were obtained. Conclusions: Arrangement 1, provides the best results with a Nusselt and thermal efficiency increase. No significant differences between the DOM and the P-1 radiation were found.
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Jugănaru, Daniela-Elena, Mariana Panaitescu, and Liviu-Constantin Stan. "COMPARATIVE CFD BASED PARAMETRIC ANALYSIS OF GAS FLOW IN TWO CONTER-FLOW WET SCRUBBER SYSTEMS." Journal of marine Technology and Environment 1, no. 2021 (2021): 28–32. http://dx.doi.org/10.53464/jmte.01.2021.04.

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" In this study, gas flow field were simulated using ANSYS 2020R2, Fluid Flow Fluent computational fluids dynamic (CFD) software based on the continuity, velocity, temperature, energy and k -  turbulence. The overall objective of the study is to compare the pressure and velocity maps inside the wet scrubber system for two different scrubber designs. I have choose to analyse an In-Line scrubber bottom inlet, type I, and In-Line scrubber side inlet, type L. Bottom entry or side entry designs to allow a direct up-flow configuration and simplify engine exhaust gas duct routing for any type of vessel. The flow in a wet scrubber is very complex due to the interaction between dust particles, water droplets, and bulk water and flue gas. The flue gas flow is turbulent and there are multiple phases (gas, liquid and solid). CFD codes that predict gas flow patterns are based on conservation equations for mass, momentum and energy. The results show that the residuals have a very good job of converging at minimum flow contours and vectors at the inlet across the scrubbing chamber and outlet shows a distributed flow. The velocity profiles have fully conformed to the recommended profile for turbulent flow in pipes. As can be seen in the figures above, the velocity flow contour inside the scrubber is higher in the scrubber side inlet. Even though I choose to study the simplified scrubber model without taking into account that spray nozzle improve mixing between the scrubbing liquid and waste gas; from the results obtained, it can be deduced that the numerical simulation using CFD is an effective method to study the flow characteristics of a counter-flow wet scrubber system. "
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Dissertations / Theses on the topic "Design of flue-gas duct"

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Slíva, Karel. "Návrh dvoutlakého horizontálního kotle na odpadní teplo." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2016. http://www.nusl.cz/ntk/nusl-254297.

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The focus of this thesis is a proposal of a horizontal dual-pressure heat recovery steam generator. The introductory part includes thermal calculation, as well as a design of the layout and a design of the heat transfer surfaces and the layout of the boiler. Individual chapters are broken down according to the outline of the proposal for the arrangement of the heating surfaces, according to the parameters of the flue gas and steam. The master thesis contains a scheme of a real heat transfer temperature diagram and it also includes the calculation of connecting and downcomer pipes and drums. The final part describes the calculation of the boiler draft loss. The main idea of the thesis is accompanied by the technical documentation of the drawing of the boiler.
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Maršík, Jaroslav. "Dvoutlaký horizontální kotel na odpadní teplo (HRSG)." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2015. http://www.nusl.cz/ntk/nusl-232157.

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The Master’s thesis dealing with design of heat recovery steam generator with two pressure levels is split into nine sections. The first section describes the design and the layout of HRSG. The second part deals with heat calculation. The third section deals with design of flue-gas duct. The fourth part describes designs of individual heating surfaces, including steam superheaters, vaporizers and economizer. Next section shows the real temperature diagram and choice of the materials. The seventh section describes the calculation of outer pipelines and the eighth part deals with the drums design. The last section deals with the calculation of draft loss of steam generator.
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Med, Lukáš. "Návrh dvoutlakého horizontálního kotle na odpadní teplo." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2016. http://www.nusl.cz/ntk/nusl-241924.

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This master's thesis deals with thermal calculation and design of proportions of calorific components of a heat recovery steam generator (HRSG), which is placed behind a combustion turbine, for given parameters of exhaust gases and requested parameters of steam. In the first chapters is described the design, layout of HRSG and the thermal calculation. The next parts deal with the design of flue-gas duct and each individual heating surface. Next section shows computations of dimensions of drums, flooding pipes, transferring pipes and all other outer pipes. The chosen materials are described in one of the last chapters and the last chapter deals with calculation of draft loss of steam generator.
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Chang, Sen-min. "Preliminary investigation on flue gas desulfurization in an in-duct spray dryer using condensation aerosols." Ohio : Ohio University, 1991. http://www.ohiolink.edu/etd/view.cgi?ohiou1183659888.

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Havlíček, Tomáš. "Výpočet a dimenzování konstrukce přechodového vedení." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2008. http://www.nusl.cz/ntk/nusl-228209.

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The goal of this thesis is to create a methodic and a system, which would involve customized computing and consequent design of the transition duct using input and applied data effectively and would achieve optimized set of parameters. The methodic described in the thesis is applied on transition duct within air main ducting between the filter and gas turbine. Transition duct is a huge mounted assembly consisting of welded parts. NX 5 application was chosen as system environment of the thesis. Master model is a root for both design model and computing model. Weight and material optimization is a desired result which will serve as basis for designing. It is not the goal of this thesis to create one perfect computation model BUT to create a methodic, which would be manageable by any designer equipped by basic knowledge of engineering.
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Norman, Christian G. "Design of a bench scale apparatus for the evaluation of the gamma alumina flue gas desulfurizaton process." Ohio : Ohio University, 1985. http://www.ohiolink.edu/etd/view.cgi?ohiou1184071211.

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Latcham, Jacob G. (Jacob Greco). "Heat exchanger design for thermoelectric electricity generation from low temperature flue gas streams." Thesis, Massachusetts Institute of Technology, 2009. http://hdl.handle.net/1721.1/54513.

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Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2009.
Cataloged from PDF version of thesis.
Includes bibliographical references (p. 33).
An air-to-oil heat exchanger was modeled and optimized for use in a system utilizing a thermoelectric generator to convert low grade waste heat in flue gas streams to electricity. The NTU-effectiveness method, exergy, and thermoelectric relations were used to guide the modeling process. The complete system design was optimized for cost using the net present value method. A number of finned-tube compact heat exchanger designs were evaluated for high heat transfer and low pressure loss. Heat exchanger designs were found to favor either power density or exergy effectiveness to achieve optimal net present value under different conditions. The model proved capable of generating complete thermoelectric flue gas systems with positive net present values using thermoelectric material with a ZT value of 0.8 and second law efficiency of 13%. Complete systems were generated for a number of economic conditions. The best complete system achieved a first law efficiency of 1.62% from a 1500 C flue gas stream at an installed cost of $0.79 per watt.
by Jacob G. Latcham.
S.B.
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Norman, Christian G. III. "Design of a bench scale apparatus for the evaluation of the gamma alumina flue gas desulfurization process." Ohio University / OhioLINK, 1985. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1184071211.

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Kornelius, Gerrit. "The design of electrostatically augmented moving bed granular gas filters." Pretoria : [s.n.], 2003. http://upetd.up.ac.za/thesis/available/etd-05052005-095030/.

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Chernov, Gregory S. "Design and evaluation of a technological process for bio-sequestration of carbon dioxide from industrial flue gas emissions." Connect to resource, 2010. http://hdl.handle.net/1811/45461.

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Books on the topic "Design of flue-gas duct"

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Needle felts in gas and dust filtration: The design of mechanically-bonded filters. Chichester: Ellis Horwood, 1987.

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Lee, D. T. Conceptual design of SEAFP tokamak/fuel cycle building-emergency detritiation and dust removal systems. Mississauga, Ont: Canadian Fusion Fuels Technology Project, 1994.

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American Society of Civil Engineers. Air and Gas Duct Structural Design Committee., ed. The structural design of air and gas ducts for power stations and industrial boiler applications. New York: American Society of Civil Engineers, 1995.

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Tham96VN, Hoang. Gas and Dust Funny Design Notebook: 6x9 Inch, 120 Pages , Useful to Writing , Doodle, Diary ... ... ... ... . . Independently Published, 2020.

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DuPont, André. An American Solution For Reducing Carbon Emissions: Averting Global Warning Creating Green Energy and Sustainable Employment. Andy DuPont, 2009.

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Book chapters on the topic "Design of flue-gas duct"

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Hötte, Felix, Oliver Günther, Christoph von Sethe, Matthias Haupt, Peter Scholz, and Michael Rohdenburg. "Lifetime Experiments of Regeneratively Cooled Rocket Combustion Chambers and PIV Measurements in a High Aspect Ratio Cooling Duct." In Notes on Numerical Fluid Mechanics and Multidisciplinary Design, 279–93. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-53847-7_18.

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Abstract This paper aims at experimental investigations of the life limiting mechanisms of regeneratively cooled rocket combustion chambers, especially the so called doghouse effect. In this paper the set up of a cyclic thermo-mechanical fatigue experiment and its results are shown. This experiment has an actively cooled fatigue specimen that is mounted downstream of a subscale GOX-GCH$$_{\text {4}}$$ combustion chamber with rectangular cross section. The specimen is loaded cyclically and inspected after each cycle. The effects of roughness, the use of thermal barrier coatings, the length of the hot gas phase, the oxygen/fuel ratio and the hot gas pressure are shown. In a second experiment the flow in a generic high aspect ratio cooling duct is measured with the Particle Image Velocimetry (PIV) to characterize the basic flow. The main focus of the analysis is on the different recording and processing parameters of the PIV method. Based on this analysis a laser pulse interval and the window size for auto correlation is chosen. Also the repeatability of the measurements is demonstrated. These results are the starting point for future measurements on the roughness effect on heat transfer and pressure loss in a high aspect ratio cooling duct.
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Ghosh, Rajat S., John R. Smith, and Angelique Adams. "Horizontal In-Duct Scrubbing of Sulfur-Dioxide from Flue Gas Exhausts." In Light Metals 2015, 595–601. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2015. http://dx.doi.org/10.1002/9781119093435.ch99.

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Ghosh, Rajat S., John R. Smith, and Angelique Adams. "Horizontal In-Duct Scrubbing of Sulfur-Dioxide from Flue Gas Exhausts." In Light Metals 2015, 597–601. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-48248-4_99.

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Kuhn, W., and A. Reynolds. "New Oxy-Combustion Crown Design for Efficient Flue Gas Heat Recovery." In 77th Conference on Glass Problems, 167–70. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2017. http://dx.doi.org/10.1002/9781119417507.ch15.

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Zeng, Fang, LianQing Yin, and Li Chen. "Numerical Simulation and Optimized Design of the Wet Flue Gas Desulphurization Spray Tower." In Challenges of Power Engineering and Environment, 783–87. Berlin, Heidelberg: Springer Berlin Heidelberg, 2007. http://dx.doi.org/10.1007/978-3-540-76694-0_146.

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Kornienko, Victoria, Roman Radchenko, Dmytro Konovalov, Andrii Andreev, and Maxim Pyrysunko. "Characteristics of the Rotary Cup Atomizer Used as Afterburning Installation in Exhaust Gas Boiler Flue." In Advances in Design, Simulation and Manufacturing III, 302–11. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-50491-5_29.

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Kun, H. U., and M. A. Xue-song. "The Ammonia Injection System on the Flue Gas Duct before the Electrostatic Precipitator Inlet in Zhangjiang Orimulsion Power Plant." In Challenges of Power Engineering and Environment, 684–88. Berlin, Heidelberg: Springer Berlin Heidelberg, 2007. http://dx.doi.org/10.1007/978-3-540-76694-0_128.

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Huang, Fengguang, Lin Tian, and Wei Wang. "Design and Development of Integrated Device for Wireless Detection of Flue Gas in Cremation Equipment." In Lecture Notes in Electrical Engineering, 721–29. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-8450-3_75.

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"Maintenance Examination of Existing Duct Systems." In The Structural Design of Air and Gas Ducts for Power Stations and Industrial Boiler Applications, 261–81. Reston, VA: American Society of Civil Engineers, 1995. http://dx.doi.org/10.1061/9780784401125.ch12.

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Matthews, Clifford. "Flue gas desulphurisation – total design." In Case Studies in Engineering Design, 217–31. Elsevier, 1998. http://dx.doi.org/10.1016/b978-034069135-9/50021-7.

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Conference papers on the topic "Design of flue-gas duct"

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Shi, Xuefeng, Wulang Chriswindarto, and David Boyce. "Application of CFD Modeling in HRSG Evase Design." In ASME 2009 Power Conference. ASMEDC, 2009. http://dx.doi.org/10.1115/power2009-81156.

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Computational simulation of flow, heat transfer and combustion in a vertical tube heat recovery system generator (HRSG) with a single angel roof, a dual angle roof and an air flow optimized evase are studied. Existing theoretical models for flow and gas combustion [1] are used to predict how the three kinds of roof shapes influence the flue gas and temperature distribution in the whole HRSG System, and particularly the flue gas distribution upstream of first heat exchanger bundles (superheater 3 and reheater 2) and duct burner as well as the temperature distribution downstream of the duct burner. The gas phase conservation equations of momentum, enthalpy and mixture fraction are solved utilizing the k-(epsilon) turbulence model. A Finite Rate/Eddy Dissipation model and the P-1 radiation mode are used to predict gas combustion and radiative heat transfer, respectively. The simulation results show the air flow optimized evase not only provides a more uniform velocity profile upstream of the first heat exchanger bundle, but is also able to reduce the pressure drop through the whole HRSG system.
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Brimmo, Ayoola T., and Mohamed I. Hassan Ali. "Furnace Design for Improved Exhaust Gas Circulation and Heat Transfer Efficiency." In ASME 2020 Heat Transfer Summer Conference collocated with the ASME 2020 Fluids Engineering Division Summer Meeting and the ASME 2020 18th International Conference on Nanochannels, Microchannels, and Minichannels. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/ht2020-9069.

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Abstract In the aluminum production industry, metal furnaces are operated by diffusion flame over the metal surface to maintain the aluminum metal at the set point temperature for alloying and casting. Heat is transferred from the flame and its exhaust gases to the metal surface via radiation and convection. The exhaust gases leaves through the furnace’s chimney carrying a significant amount of waste heat to the atmosphere. Furnace efficiency could be improved by enhancing the heat transfer inside the furnace. In this study, a validated full-scale 3-D CFD model of a natural gas fired aluminum furnace is developed to investigate the effect of flue gas ventilation configurations and burner operating conditions on the heat transfer inside the furnace. Onsite measurements are carried out for the fuel and airflow rates as well as flue gas temperature. Four flue ventilation configurations are considered with eight furnace’s operation modes. The flue-gas’s waste-heat varies from 49–58%, with the highest value occurring at the high-fire operating mode. This indicates a significant room for improvement in the furnace performance. Results suggest that a symmetrical positioning of the exhaust duct favors effective exhaust gas circulation within the furnace and hence, increases hot-gases’ heat-transfer effectiveness inside the furnace. These results provide some guidelines for optimal aluminum reverberatory furnace designs and operation.
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Pal, S., Leonard Peltier, Mitchell Krasnopoler, Kelly J. Knight, and Jonathan Berkoe. "Predicting Fly Ash Accumulation in a Fossil Power Plant Flue Gas Duct Using Computational Fluid Dynamics." In ASME 2011 Power Conference collocated with JSME ICOPE 2011. ASMEDC, 2011. http://dx.doi.org/10.1115/power2011-55077.

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During the startup of a new fossil power plant, a high level of fly ash accumulation (higher than predicted) was encountered in the flue gas ducting upstream of a fluidized bed scrubber. The level of fly ash accumulation made it necessary to manually withdraw fly ash using a vacuum truck after short periods of operation, at less than 80% maximum continuous rating (MCR). This paper presents a simple method for rapid assessment of fly ash accumulation in flue gas ducts using steady state single phase Computational Fluid Dynamics (CFD) simulation of flue gas flow. The propensity for fly ash accumulation in a duct is predicted using calculated wall shear stresses from CFD coupled with estimates for the critical shear stresses required for mobilization of settled solids. Critical values for the mobilization stresses are determined from the Shields relations for incipient motion of particles in a packed bed with given fly ash particle size and density as inputs. Solids accumulation is possible where the wall shear stress magnitude is less than the critical shear stress for mobilization calculated from the Shields relations. Predictions of incipient fly ash accumulation based on the coupled CFD/Shields relations model correlate well with plant startup field observations. Fly ash accumulation was not observed in a related physical scale model test. A separate CFD/Shields relation analysis of the scale model physical tests show that the wall shear stresses in the scale model are several times larger than the critical value required for the mobilization of the fly ash simulant. This study demonstrates that a simple steady state, single phase CFD analysis of flue gas flow can be used to rapidly identify and address fly ash accumulation concerns in flue gas duct designs. This approach is much simpler and computationally inexpensive compared to a transient Eulerian multiphase simulation of particle laden flow involving handling the dense phase in regions of ash accumulation. Further, this study shows that physical model tests will be accurate for predicting fly ash accumulation, only if, the scaling maintains the proper ratio of wall shear stress to critical remobilization stress.
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Bases, Gary J. "Water Gauge, Flue Plate Stiffeners, and Insulation Systems Design Considerations." In 11th North American Waste-to-Energy Conference. ASMEDC, 2003. http://dx.doi.org/10.1115/nawtec11-1671.

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Tremendous money is wasted due to the lack of attention to the water gauge and flue plate stiffeners, and their impact on the insulation and lagging design. The design and installation of an insulation and lagging system will depend heavily upon the flue or duct stiffener arrangement. The stiffener arrangement is determined by many factors including the water gauge of the flue or duct plate design. The stiffener pattern and size is the first thing you consider when designing an insulation and lagging system. Therefore, it is imperative to understand how the size, shape and pattern of the external stiffeners are developed. The stiffener sizing of yesterday was based on a much lower water gauge pressure and allowed the insulation to be placed between the stiffeners without having to cut-to-fit. The stiffeners being designed today are quite large and much farther apart. This is due in part to the water gauge number being used in the design calculations and because they have not considered the required insulation thickness and application. A well designed and installed insulation and lagging system will save money and energy at a rate that is essential for an efficient plant operation. This is especially true when adding a selective catalytic reduction system (SCR) or a selective non catalytic reduction system (SNCR) to the back end of a steam-generating unit. The insulation and lagging system is critical for these air pollution systems to operate correctly.
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Lorra, Michael A., Carol A. Schnepper, and Stephen Somers. "Investigation of a Duct Burner Design Using CFD in Comparison With Full-Scale Experiments." In International Joint Power Generation Conference collocated with TurboExpo 2003. ASMEDC, 2003. http://dx.doi.org/10.1115/ijpgc2003-40080.

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Most new duct burners are supplied to heat recovery steam generator (HRSG) manufacturers for use in cogeneration systems. Key components of a simple cycle cogeneration plant include a turbine, generator, turbine exhaust gas duct, duct burner (optional), HRSG and downstream flue gas cleaning equipment. New developments in gas turbine technology are changing the boundary conditions for supplemental firing. In response, John Zink has an ongoing research project for the development of new duct burners achieving ultra low NOx emissions maintaining a good flame quality. The scope of this research work includes computational fluid dynamic modeling (CFD) and experimental testing of current design duct burner to obtain baseline data comparable with CFD results, and various experimental configurations through a full range of expected operating conditions. Experimental testing is performed in a test furnace at John Zink Company, Tulsa. Turbine exhaust gas (TEG) is simulated using John Zink Duct burners, which are supplied with air from a combustion air fan. Different O2 levels can be achieved by a combined water/steam injection. The temperature level of the TEG to the test burner can be adjusted with an air-cooled heat exchanger. Temperature and concentration measurements can be made at the test burner location and in the stack. Flame length, as well as NOx and CO emissions were measured for each data point. CFD modeling focused on the performance effects of turbine exhaust gas flow mal-distribution and the investigation on how reliable CFD models are, regarding flame stability calculations and NOx production. The results of this comprehensive testing and results from the CFD calculations will be compared and presented.
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Payrhuber, Klaus, and Hermann Halozan. "Dynamic Instabilities in Natural-Circulation Evaporators of Vertical HRSGs." In ASME 1997 International Gas Turbine and Aeroengine Congress and Exhibition. American Society of Mechanical Engineers, 1997. http://dx.doi.org/10.1115/97-gt-324.

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Dynamic instabilities become increasingly one of the design criteria for natural-circulation evaporators in Heat Recovery Steam Generators (HRSGs) of combined cycle power plants, especially in systems with a vertical gas duct. To calculate such instabilities, the computer program DEDYN is being developed. The calculation method has been presented at the ASME Cogen-Turbo Power 1995 in Vienna (Payrhuber, 1995). This publication deals with modeling of a natural-circulation evaporator. The evaporator investigated in this paper consists of 340 parallel finned tubes in 4 layers of 16 meters (total tube length of one tube is 64 meters) and a total heat transfer surface of 16400 square meters. This heat exchanger bundle of a HRSG with a vertical duct is divided in 8 sub-ducts, which permits a calculation with local heating medium (= flue gas) temperatures. The inlet and outlet headers of this bundle are connected to a drum. Several variations have been investigated like changing the operation pressure, different heights of the drum, subcooling when entering the downcomer, as well as parallel flow or counter flow through the evaporator tube bundle. The paper shows the boundary conditions for preventing or at least damping mass flow oscillations in the evaporator.
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Buzanowski, Mark A., and Sean P. McMenamin. "Integrated Exhaust System for Simple Cycle Power Plants." In ASME 2010 Power Conference. ASMEDC, 2010. http://dx.doi.org/10.1115/power2010-27310.

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Simple cycle power plants are frequently utilized as peaking power plants which generate electricity typically during a high demand. To comply with environmental standards simple cycle power plants are equipped with emission control catalysts reducing emissions of nitrogen oxides, carbon monoxide and other pollutants. In some applications ambient air (so called tempering air) is injected into the exhaust duct to control temperature of the flue gas prior to entering environmental catalysts. Such catalytic treatment of pollutants present in the flue gas requires exhaust systems with substantial footprints to accommodate the emission control catalysts and tempering air injection systems. This paper discusses a new compact exhaust system and efficient arrangement of the tempering air system for simple cycle power plants. The proposed system includes transitioning hot exhaust flue gas into pre-oxidation section of the exhaust system, passing hot exhaust gas through the oxidation catalyst for the CO emissions control, injecting tempering air stream into the post-oxidation section of the exhaust system, and passing cooled flue gas through the reduction catalyst for the NOx emissions control. The resultant benefit of this newly designed process is a more effective use of catalysts, a smaller exhaust footprint of equipment and a lower capital cost to the end user.
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Clark, Ray C., and Julius C. Mekwinski. "Gas Turbine Engine Noise Control Using Fiber Metal Lined Ducts." In ASME 1993 International Gas Turbine and Aeroengine Congress and Exposition. American Society of Mechanical Engineers, 1993. http://dx.doi.org/10.1115/93-gt-433.

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Fiber metal acoustic sheet materials are used in lined duct sound absorbers for gas turbine engine noise. Duct treatment utilizes a fiber metal face sheet backed by a cavity of controlled depth. The fiber metal facing and cavity depth provide a tuned system that is broadly effective in a desired frequency band. Fiber metal lined ducts are used in engine applications such as fan ducts, inlet cowls, auxiliary power units and environmental control systems. This approach is used in engine treatments to provide effective absorption within engine limits of weight and space. This paper discusses design methodology for fiber metal ducts. Topics include frequency tuning the absorber, treated area versus noise reduction, matching the acoustical impedance of the fiber metal to the air in the duct, the effects of flow and sound pressure level in the duct on noise reduction, and an example of noise reduction achieved in an engine application.
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Zangeneh, M. "On the Inverse Design of Inter-Stage Ducts, Diffuser Walls and Meridional Geometry of Turbomachines." In ASME 1997 International Gas Turbine and Aeroengine Congress and Exhibition. American Society of Mechanical Engineers, 1997. http://dx.doi.org/10.1115/97-gt-208.

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In this paper a method is presented for the design of diffuser walls, interstage ducts and meridional geometry of turbomachines. In this method the wall geometry is designed subject to a specified meridional velocity distribution. The effect of variations in inlet velocity (or inlet shear flow) to the duct is modelled by using a vorticity term related to spanwise variations in stagnation enthalpy and the drift function. The flow field is then solved by using a streamfunction and a kinematic condition based on the vorticity in the flow. A simple transpiration model is used to update the wall geometry. To design the meridional geometry of turbomachines a vorticity related to bound circulation is introduced. This vortex term together with the inviscid slip condition can be used to find the swirl distribution when blade shape is specified (blade analysis mode) or the blade shape when the swirl distribution is specified (blade design mode). The results of the application of the method to a converging duct, an S-shaped duct with non-uniform inlet flow and the meridional geometry of a centrifugal compressor impeller confirm the validity of this approach.
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Chakraborty, Ishita, Anup Paul, and Gyorgy Szasz. "Addressing Shell Mode Vibration in Ducts in Refinery With Computational Models and Field Data." In ASME 2019 Pressure Vessels & Piping Conference. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/pvp2019-93613.

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Abstract This paper describes the work performed to study the shell mode vibration of a large cross-section flue gas duct. The work involved the collection of field vibration data, as well as predictive computational models associated with finite element analysis (FEA) and computational fluid dynamics (CFD). The goal of this work was to use predictive models to ascertain whether a proposed design change would reduce the vibration levels of the duct under similar operating conditions. The vibration observed in the duct was identified as a flow induced vibration (FIV) which excited the shell modes of the duct walls. This case study serves as an example of using predictive computational models (FEA and CFD), calibrated with vibration response data from field measurements, to represent the real world situation as closely as possible within specified budget and schedule constraints. Such calibrated models can be useful for forecasting the effectiveness of various proposed design changes.
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Reports on the topic "Design of flue-gas duct"

1

Cole, J. A., G. H. Newton, J. C. Kramlich, and R. Payne. Global evaluation of mass transfer effects: In-duct injection flue gas desulfurization. Office of Scientific and Technical Information (OSTI), September 1990. http://dx.doi.org/10.2172/6192018.

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Author, Not Given. Theoretical approach for enhanced mass transfer effects in-duct flue gas desulfurization processes. Office of Scientific and Technical Information (OSTI), August 1989. http://dx.doi.org/10.2172/5112907.

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Jozewicz, W., and G. T. Rochelle. Theoretical approach for enhanced mass transfer effects in-duct flue gas desulfurization processes. Office of Scientific and Technical Information (OSTI), January 1992. http://dx.doi.org/10.2172/5427163.

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Jozewicz, W., and G. T. Rochelle. Theoretical approach for enhanced mass transfer effects in-duct flue gas desulfurization processes. Office of Scientific and Technical Information (OSTI), January 1992. http://dx.doi.org/10.2172/5427200.

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Jozewicz, Wojciech, and G. T. Rochelle. Theoretical approach for enhanced mass transfer effects in duct flue gas desulfurization processes. Office of Scientific and Technical Information (OSTI), September 1991. http://dx.doi.org/10.2172/5586316.

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Jozewicz, W., and G. T. Rochelle. Theoretical approach for enhanced mass transfer effects in-duct flue gas desulfurization processes. Volume 2, Duct spray drying: Final report. Office of Scientific and Technical Information (OSTI), January 1992. http://dx.doi.org/10.2172/10138862.

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Author, Not Given. Global approach for enhanced mass transfer effects in-duct flue gas desulfurization processes: Quarterly progress report No. 3. Office of Scientific and Technical Information (OSTI), June 1989. http://dx.doi.org/10.2172/5931689.

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8

Jozewicz, W., and G. T. Rochelle. Theoretical approach for enhanced mass transfer effects in-duct flue gas desulfurization processes. Volume 1, Dry sorbent injection: Final report. Office of Scientific and Technical Information (OSTI), January 1992. http://dx.doi.org/10.2172/10138873.

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Jozewicz, Wojciech, and G. T. Rochelle. Theoretical approach for enhanced mass transfer effects in duct flue gas desulfurization processes. Topical report for Task 4, Novel techniques. Office of Scientific and Technical Information (OSTI), September 1991. http://dx.doi.org/10.2172/10125937.

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Author, Not Given. Design of a low-cost, compact SRF accelerator for flue gas and wastewater treatment. Office of Scientific and Technical Information (OSTI), December 2017. http://dx.doi.org/10.2172/1414583.

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