Relevant bibliographies by topics / Radiant Furnaces

Contents

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

Academic literature on the topic 'Radiant Furnaces'

Author: Grafiati
Published: 4 June 2021
Last updated: 8 February 2022

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the lists of relevant articles, books, theses, conference reports, and other scholarly sources on the topic 'Radiant Furnaces.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Journal articles on the topic "Radiant Furnaces"

1

Büschgens, Dominik, Narayana K. Karthik, Nico Schmitz, and Herbert Pfeifer. "Influence of Surroundings on Radiant Tube Lifetime in Indirect-Fired Vertical Strip Annealing Furnaces." Applied Sciences 10, no. 5 (March 4, 2020): 1748. http://dx.doi.org/10.3390/app10051748.

Full text
Abstract:
The effects of surrounding radiation—emanating from radiation exchange with neighboring partners in indirect-fired vertical strip annealing furnaces, such as the other radiant tubes, the passing strip, and the enclosing furnace chamber—on the radiant tube lifetime were studied. In-house developed and validated numerical models were used to calculate the thermomechanical behavior, especially creep deformations and the corresponding stresses as lifetime indicating parameters. Different setups of recirculating P-type radiant tubes were investigated, including a reference case of an isolated tube. The investigations could be broadly classified into the study of the effects of different tube arrangements, burner operations (synchronous/asynchronous on/off firing), and changes of strip parameters (width/temperature). Results showed higher creep deformation of the central radiant tube in the setup with three tubes arranged horizontally in a row compared to three tubes stacked in a vertical column, even though the respective characteristic temperature values in a firing cycle were similar. Furthermore, the cases with asynchronous burner firing resulted in lower creep rates than other cases, where the burners were operating in synchronous on/off firing modes. In addition, the change of strip width had a higher impact on radiant tube lifetime compared to locally changing strip temperatures across the furnace. Alternating temperatures, caused by burner operation or process changes, such as change of strip’s speed or cross-section, and local temperature gradients were observed to be the main factors influencing the tube’s service life.
APA, Harvard, Vancouver, ISO, and other styles
2

García-Martino, Angel, and María Manuela Prieto. "Practical thermal model for a radiant tubes annealing furnace." Metallurgical Research & Technology 117, no. 1 (2020): 109. http://dx.doi.org/10.1051/metal/2020003.

Full text
Abstract:
Modeling of vertical radiant tube annealing furnaces has proven to be one of the best tools to improve the performance of a galvanizing line. However, there is a lack of a practical model able to consider the temperature and status of the radiant tubes, which are key elements in the capacity of the furnace. The model proposed divides the furnace in several segments and compares the radiated heat, that is exchanged between the radiant tubes and the strip, and the heat required to increase the temperature of the mass flow on the strip. This comparison is represented as an implicit equation where the strip‘s temperature is obtained by iteration. The model is validated calculating the final temperature of more than five hundred coils divided in four different steel families. The 90% of the calculated temperatures are within a 2% deviation range compared to the measured temperatures. This model combines good accuracy in the results with low computational times, allowing the simulation of hundreds of coils in a few minutes.
APA, Harvard, Vancouver, ISO, and other styles
3

Li, Zaoyang, Lijun Liu, Yunfeng Zhang, Qingchao Meng, Zhiyan Hu, and Genshu Zhou. "Preservation of Seed Crystals in Feedstock Melting for Cast Quasi-Single Crystalline Silicon Ingots." International Journal of Photoenergy 2013 (2013): 1–7. http://dx.doi.org/10.1155/2013/670315.

Full text
Abstract:
The preservation of seed crystals is important for the casting of quasi-single crystalline (QSC) silicon ingots. We carried out transient global simulations of the feedstock melting process in an industrial-sized directional solidification (DS) furnace to investigate key factors influencing seed preservation. The power distribution between the top and side heaters is adjusted in the conventional furnace for multicrystalline silicon ingots and in the evolved furnace with a partition block for QSC silicon ingots. The evolution of the solid-liquid interface for melting and the temperature distribution in the furnace core area are analyzed. The power distribution can influence the temperature gradient in the silicon domain significantly. However, its effect on seed preservation is limited in both furnaces. Seed crystals can be preserved in the evolved furnace, as the partition block reduces the radiant heat flux from the insulation walls to the heat exchange block and prevents the heat flowing upwards under the crucible. Therefore, the key to seed preservation is to control radiant heat transfer in the DS furnace and guarantee downward heat flux under the crucible.
APA, Harvard, Vancouver, ISO, and other styles
4

Makhmudov, Sirozhiddin, Yuldash Sobirov, and Abdujabbor Abdurakhmanov. "Remote method of temperature measurement in the focus of high-temperature solar furnaces." E3S Web of Conferences 216 (2020): 01145. http://dx.doi.org/10.1051/e3sconf/202021601145.

Full text
Abstract:
The paper presents a remote method for measuring heated bodies up to 3000 °C under a concentrated flow of radiant energy from the sun. The article discusses the issue of improving the accuracy of temperature measurement by refining the emissivity of materials during irradiation with a highly concentrated radiant flux.
APA, Harvard, Vancouver, ISO, and other styles
5

Minea, Alina, and Oronzio Manca. "Experimental studies on radiation heat transfer enhancement on a standard muffle furnace." Thermal Science 17, no. 2 (2013): 591–98. http://dx.doi.org/10.2298/tsci110309167m.

Full text
Abstract:
One of the sources of increased industrial energy consumption is the heating equipment, e.g., furnaces. Their domain of use is very wide and due to its abundance of applications it is key equipment in modern civilization. The present experimental investigations are related to reducing energy consumptions and started from the geometry of a classic manufactured furnace. During this experimental study, different cases have been carefully chosen in order to compare and measure the effects of applying different enhancement methods of the radiation heat transfer processes. The main objective work was to evaluate the behavior of a heated enclosure, when different radiant panels were introduced. The experimental investigation showed that their efficiency was influenced by their position inside the heating area. In conclusion, changing the inner geometry by introducing radiant panels inside the heated chamber leads to important time savings in the heating process.
APA, Harvard, Vancouver, ISO, and other styles
6

Zhang, Meng, Yan Ru Chen, Ling Fei Xu, and Yong Qing Wang. "A Novel Optic Senor for Real-Time Metal Analysis in the BOF Steelmaking Process." Advanced Materials Research 156-157 (October 2010): 1594–97. http://dx.doi.org/10.4028/www.scientific.net/amr.156-157.1594.

Full text
Abstract:
A fiber optic senor for carbon content measurement of the molten steel in a basic oxygen furnace (BOF) is described. The sensor includes a fiber optic cable for transmission of the optical radiation from the radiation collection head to the multi-wavelength detection unit located in remote area from a furnace. The radiation collection head includes a telephoto lens aimed at the furnace mouth to collect, and thus enhance, the effective radiant energy emitted from the hostile environment adjacent a furnace as well as to reduce spurious radiations from other nearby furnaces. The detection unit based on emission spectroscopy converts the radiations into digital signals and the signal information processed to determine the carbon content of the steel contained in the metallurgical furnace. The Preliminary results after online carbon content sensing are discussed.
APA, Harvard, Vancouver, ISO, and other styles
7

Zhang, Meng, Yan Ru Chen, Ling Fei Xu, and Yong Qing Wang. "A New Optic Senor for Real-Time Bath Temperature Measurement in a BOF." Advanced Materials Research 181-182 (January 2011): 642–46. http://dx.doi.org/10.4028/www.scientific.net/amr.181-182.642.

Full text
Abstract:
A robust, non-contact sensor that measures BOF endpoint bath temperature has been developed and evaluated over a large number of industry heats. The optical hardware consists of a radiation collection head and a multi-wavelength detection unit. The radiation collection head aimed at the furnace mouth is used to collect, and thus enhance, the effective radiant energy emitted from the hostile environment adjacent a furnace as well as to reduce spurious radiations from other nearby furnaces. The detection unit separates the collected radiations into spectroscopy and then converts this spectroscopy into digital signals. Finally, the signal information is processed to determine the carbon content of the steel contained in the metallurgical furnace. The Preliminary results after online carbon content sensing are discussed.
APA, Harvard, Vancouver, ISO, and other styles
8

Oyelami,, Adekunle Taofeek, Samuel Babatope Adejuyigbe, and Samuel Olugbenga Olusunle. "Thermal Analysis of Recuperator Developed for Waste Heat Recycling in Liquid-Fuel Fired Furnaces." International Journal of Heat and Technology 39, no. 1 (February 28, 2021): 121–27. http://dx.doi.org/10.18280/ijht.390112.

Full text
Abstract:
Three major parameters for efficient liquid-fuel-fired melting-furnaces include fuel-economy, thermal efficiency and environmental friendliness of operation. These key parameters form the basis for the adoption of recuperator in the waste gas recycling released during many melting operations in furnaces. This work analysed the thermal performance of both cold and hot fluids across the length of a double-pipe recuperator coupled to a ferrous-melting furnace. The thermal analysis carried out was anchored on some basic assumptions including taking the radiant and temperature characteristics of the exiting waste gases from the exhaust of the furnace as being constant over the volume of the furnace while the temperature at various positions on metal surface is equally taken as being constant. In addition, the heat flow transferred from the waste gases to the lining of the furnace is taken to be by convection and it is equal to the heat flow that the lining gives up to the adjourning surrounding. The derived equations were thereafter analysed and subsequently solved. The obtained results were thereafter used to graphically illustrate the variation of temperature of the agents of heat transfer over the entire length of the recuperator at different instances for parallel flow of the constituent working fluids. The analysis was observed to have conformed to a very great extent to the theoretical pattern expected for similar flows.
APA, Harvard, Vancouver, ISO, and other styles
9

Nizhegorodov, A. I. "Modeling the transfer of radiant energy to a bulk medium in electric furnaces with the upper position of the radiating elements." NOVYE OGNEUPORY (NEW REFRACTORIES), no. 2 (September 14, 2020): 10–14. http://dx.doi.org/10.17073/1683-4518-2020-2-10-14.

Full text
Abstract:
A new design of suspended radiating elements, which was developed for heating systems of electric furnaces with moving hearth platforms and modular-trigger furnaces, is considered. The transfer of radiant energy on the surface of the firing modules and on the flow of expanded vermiculite is simulated. Analytical dependences are obtained for calculating the temperatures of radiating elements, a refractory base and a heat-insulating cover, as well as grains of the material itself. The possibility of a significant increase in the performance of modular-launch furnaces due to the fact that in the areas of pouring out of the firing modules the crowding of vermiculite will not lead to burnout of the radiating elements, as was observed in tape nichrome systems, is shown.
APA, Harvard, Vancouver, ISO, and other styles
10

Abdullin, A. "Influence of the Spectral Model of Radiation on the Calculated Characteristics of Complex Heat Exchange in Flame Furnaces of the Petrochemical Industry." Bulletin of Science and Practice 6, no. 6 (June 15, 2020): 42–47. http://dx.doi.org/10.33619/2414-2948/55/05.

Full text
Abstract:
The influence of the spectral model of radiation on heat fluxes and the temperature of combustion products in the radiant chambers of tube furnaces of the petrochemical industry is analyzed. A wide-band model and a Hottel gray model are considered. It is shown that the spectral model of the combustion medium radiation weakly affects the calculated characteristics of the total heat transfer.
APA, Harvard, Vancouver, ISO, and other styles
More sources

Dissertations / Theses on the topic "Radiant Furnaces"

1

Rafidi, Nabil. "Thermodynamic aspects and heat transfer characteristics of HiTAC furnaces with regenerators." Doctoral thesis, KTH, Materials Science and Engineering, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-541.

Full text
Abstract:

Oxygen-diluted Combustion (OdC) technology has evolved from the concept of Excess Enthalpy Combustion and is characterized by reactants of low oxygen concentration and high temperature. Recent advances in this technology have demonstrated significant energy savings, high and uniform thermal field, low pollution, and the possibility for downsizing the equipment for a range of furnace applications. Moreover, the technology has shown promise for wider applications in various processes and power industries.

The objectives of this thesis are to analyze the thermodynamic aspects of this novel combustion technology and to quantify the enhancement in efficiency and heat transfer inside a furnace in order to explore the potentials for reduced thermodynamic irreversibility of a combustion process and reduced energy consumption in an industrial furnace. Therefore, theoretical and experimental investigations were carried out.

The 2nd law of thermodynamics analyses of OdC systems have been carried out for cases in which the oxidizer is either oxygen (Flameless-oxy-fuel) or air (High Temperature Air Combustion, HiTAC). The analyses demonstrate the possibilities of reducing thermodynamic irreversibility of combustion by considering an oxygen-diluted combustion process that utilizes both gas- and/or heat-recirculation. Furthermore, the results showed that an oxygen-diluted combustion system that utilizes oxygen as an oxidizer, in place of air, results in higher 1st and 2nd law efficiencies.

Mathematical models for heat regenerators were developed to be designing tools for maximized heat recovery. These models were verified by heat performance experiments carried out on various heat regenerators.

Furthermore, experiments were performed in a semi-industrial test furnace. It was equipped with various regenerative burning systems to establish combustion and heat transfer conditions prevailing in an industrial furnace operating based on HiTAC. The tests were carried out at seven firing configurations, two conventional and five HiTAC configurations, for direct and indirect heating systems.

Measurements of energy balance were performed on the test furnace at various configurations in order to obtain the 1st law efficiency. Moreover, local measurements of temperature, gas composition, and heat fluxes in the semi-industrial test furnace were performed to find out the main characteristics of HiTAC flame and the effects of these characteristics on the heating potential, i.e., useful heating in the furnace. In the case of HiTAC, these measurements showed uniformities of chemistry, temperature, temperature fluctuation, and heat fluxes profiles. The values of fluctuations in temperature were small. The high speed jets of the fuel and air penetrated deep into the furnace. The fuel gradually disappeared while intermediate species gradually appeared in relatively high concentrations and at broader regions inside the furnace. These findings indicate: a large reaction zone, low specific combustion intensity in the flame, low specific fuel energy release, and high heat release from this large flame. In addition to the thermodynamic limitations to the maximum temperature of the Oxygen-diluted Combustion, the low specific energy release of the fuel and the high heat release from the flame to its surroundings cause this uniform and relatively moderate temperature profile in a HiTAC flame, consequently suppressing thermal-NO formation.

Heat flux and energy balance measurements showed that heating potential is significantly increased in the case of HiTAC compared to that in the conventional case, implying much more energy savings than the apparent heat recovery from the heat regenerators, and consequently much less pollutants emissions. Therefore, it is certain that this large HiTAC flame emits more thermal radiation to its surroundings than the conventional flame does, in spite of the moderate-uniform temperature profile of the flame. This intense heat flux was more uniform in all HiTAC configurations, including the indirect heating configuration, than that of the conventional-air combustion configuration.

APA, Harvard, Vancouver, ISO, and other styles
2

Farkač, Daniel. "Aplikace VBA (Visual Basic for Application) a Maple na problémy procesního inženýrství." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2009. http://www.nusl.cz/ntk/nusl-228712.

Full text
Abstract:
The task of the diploma thesis named VBA and Maple Application on Process Engineering Problems is to show the possibilities of using these programming languages for various engineering tasks. Particularly the programming language Visual Basic for Application (VBA), which is a part of MS Office package, is very little used in practise. That´s why this thesis solves the complex task of a furnaces design process; the topic was reccomended by the supervisor prof. Ing. Josef Kohoutek, CSc. Specifically, the thesis deals with calculations of heat transfer and optimization of the height of extended surfaces of tubes in the convection section of process furnaces. The entire task is elaborated in VBA and runs in Excel. After entering the input information, the created program first calculates the size and heat output of the convection section, but it can also optimize the height of extended surfaces in different parts of the convection section and thus minimize investment costs.
APA, Harvard, Vancouver, ISO, and other styles
3

James, William. "Operational aspects, failures and design of radiant tube heater systems in a continuous strip annealing furnace." Thesis, Cardiff University, 2011. http://orca.cf.ac.uk/15076/.

Full text
Abstract:
The focus of this Engineering Doctorate Thesis is the investigation into how the radiant tubes installed in the Continuous Annealing Process Line (CAPL) at Port Talbot steel works were failing and what measures could be taken to improve tube life. Radiant tube replacement and associated maintenance costs were one of CAPL’s biggest annual expenditures, with on average 33 tubes changed every year. Tube longevity was as low as 4 years in the hotter furnace zones, while in comparison, the cooler regions of the furnace had all original tubes still in operation after 12 years of service. A benchmarking process identified that most annealing furnaces were replacing on average 10% of total furnace tubes per year, while tube designs varied according to furnace manufacturer and tube supplier. Segal Galvanising line in Belgium, replaced the least amount at approximately 8.5%, through increasing material grades and subtle design changes Temperature analysis of the furnace at CAPL, highlighted that tube temperatures reached above 1000ºC with differentials of up to 75ºC across tube length in normal operation. Analysis of failed material identified that the tubes had been subjected to excessively high temperatures, which affected the microstructure and properties of the material, resulting in cracking failures at the end of the firing leg. Stress analysis showed that tube life was in the region of 4 years with current designs and maximum temperatures of 1000ºC. Installation of expansion bellows and increasing material grade resulted in longevity of the tube to increase by over double. Improvements have been made to the tube design and material specification throughout the project, with further changes employed in trial tubes, currently in use at CAPL furnace, with the aim of confirming theory discussed in this thesis and improving tube longevity.
APA, Harvard, Vancouver, ISO, and other styles
4

Kolomazník, Milan. "Predikce koroze trubek pece s využitím provozních dat." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2014. http://www.nusl.cz/ntk/nusl-231497.

Full text
Abstract:
The thesis deals with the modeling and prediction of corrosion of radiation tube snake in the heating furnace. Specifically it is focused on vertical cylindrical furnace which is included in the catalytic hydrocracking unit and serves for heating aggressive circulation gas which is the cause of high temperature corrosion. An important basis for the creation of computational models are available records about the operation of the furnace and about the corrosion and degradation mechanisms during the lifetime of the tube system in furnace. Such information enables the creation of a computational model which is based on the prediction of high-temperature corrosive damage of radiation tube snake. The computational model involving all relevant factors may serve as the basis for a predictive life management system of radiation snakes in the heating furnace.
APA, Harvard, Vancouver, ISO, and other styles
5

Latham, Dean. "Mathematical Modelling of an Industrial Steam Methane Reformer." Thesis, 2009. http://hdl.handle.net/1974/1650.

Full text
Abstract:
A mathematical model of a steam-methane reformer (SMR) was developed for use in process performance simulations and on-line monitoring of tube-wall temperatures. The model calculates temperature profiles for the outer-tube wall, inner-tube wall, furnace gas and process gas. Reformer performance ratios and composition profiles are also computed. The model inputs are the reformer inlet-stream conditions, the geometry and material properties of the furnace and catalyst-bed. The model divides the furnace and process sides of the reformer into zones of uniform temperature and composition. Radiative-heat transfer on the furnace side is modeled using the Hottel Zone method. Energy and material balances are performed on the zones to produce non-linear algebraic equations, which are solved using the Newton-Raphson method with a numerical Jacobian. Model parameters were ranked from most-estimable to least estimable using a sensitivity-based estimability analysis tool, and model outputs were fitted to limited data from an industrial SMR. The process-gas outlet temperatures were matched within 4 ºC, the upper and lower peep-hole temperatures within 12 ºC and the furnace-gas outlet temperature within 4 ºC. The process-gas outlet pressure, composition and flow rate are also accurately matched by the model. The values of the parameter estimates are physically realistic. The model developed in this thesis has the capacity to be developed into more specialized versions. Some suggestions for more specialized models include modeling of separate classes of tubes that are in different radiative environments, and detailed modeling of burner configurations, furnace-gas flow patterns and combustion heat-release patterns.
Thesis (Master, Chemical Engineering) -- Queen's University, 2009-01-06 21:50:35.04
APA, Harvard, Vancouver, ISO, and other styles
6

Lameiro, Samuel Filipe Bronze. "Análise de Reaproveitamento Energético de Calor Radiante de Equipamentos Industriais." Master's thesis, 2020. http://hdl.handle.net/10316/92131.

Full text
Abstract:
Dissertação de Mestrado Integrado em Engenharia Mecânica apresentada à Faculdade de Ciências e Tecnologia
A presente exposição, efetuada no âmbito da Dissertação de Mestrado, propõe descrever o estudo da situação energética dos equipamentos consumidores de energia na sociedade SRAMPORT - Transmissões Mecânicas, Lda., concretamente, os fornos industriais, e analisar a viabilidade económica da implementação de uma série de medidas de reaproveitamento de energia térmica. Numa breve introdução apresenta-se a empresa, com referência ao seu objeto social, componentes produzidos e consumos energéticos no ano de 2019. Segue-se uma exposição detalhada sobre a caraterização dos principais equipamentos existentes nas instalações da empresa, designadamente, as linhas de fornos contínuos e os fornos de tratamento térmico delta. Descrevem-se os cálculos para apuramento dos valores de consumo associados ao seu funcionamento e respetivos custos económicos. Partindo da situação atual, foram identificadas as perdas que ocorrem através das paredes dos fornos e analisada a possibilidade de utilização dos gases resultantes da combustão do gás natural, como energia alternativa para aquecimento de água usada noutros processos. Das várias medidas objeto de estudo, apurou-se que as mais rentáveis, dentro do contexto socio-económico da empresa, seriam as medidas ligadas ao aquecimento da água através da utilização de permutadores de calor instalados nas chaminés dos fornos de funcionamento contínuo, respetivamente, no sistema de lavagem da zona de Bariagem da linha 1, permitindo à empresa poupar cerca de 3 498,12 €/ano, com retorno do investimento entre 1 a 2 anos, e no sistema de lavagem intermédio das linhas contínuas, potenciando uma poupança de 828,19 €/ano, com retorno variável entre 6 a 17 anos, dependendo da chaminé escolhida.
The present exhibition, carried out within the scope of the Master's Dissertation, proposes to describe the study of the energy situation of energy-consuming equipment in the company SRAMPORT – Mechanical Transmissions, Lda., specifically, industrial furnaces, and to analyze the economic feasibility of implementing a series measures for reusing thermal energy. In a brief introduction, the company is presented, with reference to its corporate purpose, components produced and energy consumption in 2019. This is followed by a detailed presentation on the characterization of the main equipment existing at the company's facilities, namely, the lines of continuous furnaces and delta heat treatment furnaces. The calculations for calculating the consumption values associated with their operation and the respective economic costs are described. Based on the current situation, the losses that occur through the walls of the furnaces were identified and the possibility of using the gases resulting from the combustion of natural gas as an alternative energy for heating water used in other processes was analyzed.Of the various measures studied, it was found that the most profitable, within the socio-economic context of the company, would be the measures linked to the heating of water through the use of heat exchangers installed in the chimneys of continuous operation furnaces, respectively, in the washing system in the Bariagem zone of line 1, allowing the company to save around 3 498.12 €/year, with a payback between 1 to 2 years, and in the intermediate washing system of the continuous lines, enhancing savings of 828.19 €/year, with variable payback between 6 to 17 years, depending on the chimney chosen.
APA, Harvard, Vancouver, ISO, and other styles

Books on the topic "Radiant Furnaces"

1

Borgianni, C. Influence of the radial distribution of the blast furnace charge on radial variations in reduction of the iron-forming elements: Experimental investigation using laboratory techniques. Luxembourg: Commission of the European Communities, 1986.

Find full text
APA, Harvard, Vancouver, ISO, and other styles

Book chapters on the topic "Radiant Furnaces"

1

Mei, Feng. "Multiple Modeling of the Singleended Radiant Tubes." In Simulation and Optimization of Furnaces and Kilns for Nonferrous Metallurgical Engineering, 275–96. Berlin, Heidelberg: Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-642-00248-9_9.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Gaul, Ray. "Furnace Radiant Tube Comparisons." In 67th Porcelain Enamel Institute Technical Forum: Ceramic Engineering and Science Proceedings, Volume 26, Number 9, 89–94. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2008. http://dx.doi.org/10.1002/9780470291290.ch13.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Li, Yang Long, Shun Ming Liu, Da Wei Hou, Wei Guo, Hui Wang, and Meng Yu. "Stress Analysis and Structure Optimization of W-Shaped Radiant Tube in Continuous Annealing Furnace." In TMS 2019 148th Annual Meeting & Exhibition Supplemental Proceedings, 1067–75. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-05861-6_104.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Kenji, Suzuki, Ito Kiyotaka, Tabuchi Matsumi, and Shibuya Masaki. "Economy of Fuel Gas in a Combustion Furnace by Means of Si-C-Zr-O Tyranno-Fiber Mat Sheets Converting High Temperature Gas Enthalpy into Radiant Heat Rays." In Ceramic Transactions Series, 127–35. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2010. http://dx.doi.org/10.1002/9780470880630.ch17.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Issa, B., V. Y. Bazhin, N. M. Telyakov, and A. N. Telyakov. "Increasing of corrosion resistance of welded radiant and convection coiled-pipes in tubular furnaces at kinef crude oil refinery." In Youth technical sessions proceedings, 243–49. CRC Press, 2019. http://dx.doi.org/10.1201/9780429327070-33.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

"Failure of Radiant Tubes in a Batch-Carburizing Furnace." In ASM Failure Analysis Case Histories: Steelmaking and Thermal Processing Equipment. ASM International, 2019. http://dx.doi.org/10.31399/asm.fach.steel.c0046995.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

"Corrosion Failure of a Radiant Tube in a Furnace." In ASM Failure Analysis Case Histories: Steelmaking and Thermal Processing Equipment. ASM International, 2019. http://dx.doi.org/10.31399/asm.fach.steel.c0046998.

Full text
APA, Harvard, Vancouver, ISO, and other styles

Conference papers on the topic "Radiant Furnaces"

1

Jhajj, K. S., E. F. J. R. Caron, N. L. Chester, and K. J. Daun. "Accuracy of Thermocouples in Transient Surface Temperature Measurements Dominated by Radiant Heating." In ASME 2014 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/imece2014-38243.

Full text
Abstract:
In hot forming die quenching, furnaces are used to austenitize steel blanks and transform an Al-Si layer into a permanent Al-Si-Fe coating. Application of a simplified heat transfer model to thermocouple measurements on steel blanks heated in industrial furnaces showed specific heats that varied with blank thicknesses, raising questions about the accuracy of these measurements. A detailed experimental study on a lab scale muffle furnace shows that natural convection and variations in the surrounding temperatures has a strong influence on the inferred specific heat. An improved heat transfer model is used to qualitatively assess how austenitization influences the effective specific heat.
APA, Harvard, Vancouver, ISO, and other styles
2

Howell, John R. "HOW TO DESIGN AND CONTROL RADIANT HEATERS AND FURNACES." In Annals of the Assembly for International Heat Transfer Conference 13. Begell House Inc., 2006. http://dx.doi.org/10.1615/ihtc13.p30.40.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Lille, Simon, Wlodzimierz Blasiak, Magnus Mo¨rtberg, Tomasz Dobski, and Weihong Yang. "Heat Flux Evaluation in a Test Furnace Equipped With High Temperature Air Combustion (HTAC) Technique." In 2002 International Joint Power Generation Conference. ASMEDC, 2002. http://dx.doi.org/10.1115/ijpgc2002-26031.

Full text
Abstract:
High Temperature Air Combustion has already been applied in various industrial furnaces. Steel producers use most of the revamped furnaces. These are: • Batch and continuous heating furnaces in which HRS burners with open flames were used, • Batch and continuous heat treatment furnaces in which HRS burners with radiant tubes were used. Apart from steel industry the HTAC systems were applied to melt aluminium or to incinerate odour, vapour gases for example in pulp and paper industry. In all these applications very high fuel savings (sometimes as high as 60%), reduction of NOx and production increase (by 20–50%) was achieved. Progress in applications of the HTAC increased also needs of more information and data required by furnace and process designers. For this reason study in larger scale where at least one set of regenerative burner systems is installed are very much needed. Aim of such studies is not only to verify furnace performance with respect to the known general advantages of HTAC but are focused on specific problems related to furnace and high-cycle regenerative burners operation, process and product properties or type of fuels used. Parallel to the semi-industrial tests numerical models of furnaces have to be developed and verified. In this work, mainly results of heat flux measurements as well as results of numerical modeling of heat transfer in the HTAC test furnace are presented. Results were obtained for propane combustion at firing rate equal to 200 kW. The general code, STAR-CD, was employed in this work to analyse the HTAC test furnace numerically. HTAC test furnace at Royal Institute of Technology (KTH) with capacity of 200 kW was used in this work. The furnace is equipped with two different high-cycle regenerative systems (HRS). In both systems the “honeycomb” regenerator is used. The two-burner system is made of two pairs (four burners) of high cycle-regenerative burners with switching time between 10 and 40 seconds. HTAC test furnace is equipped with four air-cooled tubes to take away heat from the furnace. The total radiative heat flux measured in the HTAC furnace shows very uniform distribution over the whole combustion chamber. For total radiative heat flux, the values are in the range of 110–130 kW/m2 as measured by means of the total radiative heat flow meter at the furnace temperature 1100 C. Average total radiation flux on the top furnace wall is as high as 245.5 kW/m2 as well as total incident radiation flux. Total radiation heat flux on the air-cooled tube surface is very uniform along and around the tubes. Average radiant heat flux taken away by air cool tube is 35.46 kW/m2.
APA, Harvard, Vancouver, ISO, and other styles
4

Senarega, Maurizio, and Luca A. Tagliafico. "Transient Heat Transfer Processes in Batch Furnaces." In ASME 2003 Heat Transfer Summer Conference. ASMEDC, 2003. http://dx.doi.org/10.1115/ht2003-47538.

Full text
Abstract:
The present paper describes a numerical model, based on a finite-difference technique, to simulate 2D thermal transients of solid and hollow cylinders in convective and radiant rectangular cavities, with participating media and time-dependent temperature-of-internal-gases. The model takes into account all the thermo-physical property variations with temperature of both gases and materials under treatment. These last are subject to strong non-linear convective-radiative thermal boundary conditions and undergo the needed solid-solid thermodynamic transitions. The study of the whole system includes the problem of conduction inside the multilayer furnace walls, solved by a 1D transient numerical model. The proposed model has been validated with respect to a numerical solution as well as to available full-scale experimental data. In particular a simplified radiation case is carried out comparing the solution obtained by the model to that given by a finite element commercial code (ANSYS®). The calculated temperature curves have been compared with experimental measurements too, with reference to few particular points in a cylinder inside a batch furnace, during an actual heat treatment. The 2D finite difference model results to be an efficient tool for predicting the system thermal performance, well suitable for design and operating conditions optimization.
APA, Harvard, Vancouver, ISO, and other styles
5

Ganem, Ricardo, Allan T. Kirkpatrick, and Patrick Burns. "Use of the Discrete Transfer Method for Determination of the Radiation Heat Transfer in a Building Environment." In ASME 2001 Solar Engineering: International Solar Energy Conference (FORUM 2001: Solar Energy — The Power to Choose). American Society of Mechanical Engineers, 2001. http://dx.doi.org/10.1115/sed2001-108.

Full text
Abstract:
Abstract In order to evaluate comfort conditions inside a room it is necessary to estimate the mean radiant temperature (Tmrt) distribution on it. The generally accepted method to calculate radiation exchange within non-participating enclosures is the Radiosity Intensity Method (RIM). However it is very difficult to compute mean radiant temperatures with this method. This paper proposes the use of a new version of the Discrete Transfer Method (DTM). The DTM has been used before inside combustion chambers and furnaces but rarely in non-participating enclosures, such as a room. However, the Discrete Transfer Method can be used in these kind of enclosures, as this paper demonstrates, to compute the mean radiant temperature. The types of building enclosures examined are ones with with radiant heating panels, windows, and direct solar gain.
APA, Harvard, Vancouver, ISO, and other styles
6

Malikov, G., V. Lisienko, A. Titaev, and R. Viskanta. "A New Method for Direct Exchange Area Calculation in Zonal Method of Radiant Heat Transfer Modeling in Combustion Furnaces." In ASME 2014 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/imece2014-36983.

Full text
Abstract:
A new method based on the discrete transfer modeling technique for calculating the direct exchange areas (DEA) in zonal methods of radiation heat transfer is presented. The key feature of this method is a fast DEA matrix evaluation. The computational time was found to be short in comparison to other methods for direct exchange areas calculation based on numerical quadrature integration. The accuracy of the procedure is assessed by comparing the predictions with those based on the numerical integration for a test case (IFRF furnace).
APA, Harvard, Vancouver, ISO, and other styles
7

Breeding, Charlie, and Thomas W. Ziegler. "Performance of Water Cannons at Labadie." In 2002 International Joint Power Generation Conference. ASMEDC, 2002. http://dx.doi.org/10.1115/ijpgc2002-26142.

Full text
Abstract:
Amerens Labadie station consists of 4 coal fired 600 megawatt size generating units. Unit 1 installed water cannon furnace cleaning devices during a spring outage this year. Water cannons were selected to clean the deposits that result from combustion of Powder River Basin (PRB) coal at the Labadie power plant. This paper describes the evaluation of methods of cleaning furnace walls and the selection, installation, and startup experience with water cannons. Cleaning the furnace results in an increase in boiler efficiency that is translated into improved heat rate and improved cost of plant operation. Benefits from water cannon installation are described along with the problems encountered. PRB fuel combustion results in tenacious deposits that inhibit heat transfer on furnace walls. PRB coal typically has a lower ash fusion temperature than bituminous coals which leads to ash slag formation in furnaces that have been changed to PRB from the fuel the boiler was originally designed for. Often the deposit from PRB fuel is of a minimal thickness, however the reflectivity of the deposit creates a high barrier to radiant heat transfer. High Furnace Exit Gas Temperature (FEGT) indicates poor heat transfer in the furnace area and this increases the formation of slag in convection passes. Cleaning of furnace surface is critical to maximizing the heat absorption of the furnace and reducing the FEGT. The increased clean capability of the water cannons compared to existing wall blowers will be compared in this paper.
APA, Harvard, Vancouver, ISO, and other styles
8

Azzazy, Salah E., Russell D. Cochran, and Larry Sam Cox. "Bull Run Fossil Plant: Technical Design Methods for Superheat Pendant Outlet Headers Replacement." In ASME 2010 Power Conference. ASMEDC, 2010. http://dx.doi.org/10.1115/power2010-27007.

Full text
Abstract:
Bull Run Unit 1, rated at 950 MW, is the first of four fossil supercritical power plants at Tennessee Valley Authority (TVA). The unit went into commercial operation in 1967. The boiler (consists of two furnaces) built by Combustion Engineering (CE) has a radiant reheat twin divided furnace with tangential-fired coal burners. The unit’s maximum continuous rating (MCR) is 6,400,000 lbs/hr of main steam flow, with a design temperature of 1003°F and pressure of 3840 psig. Through the end of 2008, the unit had a total of approximately 670 cumulative starts and 333,185 operating hours. After years of numerous tube cracks at the Superheat Pendant Outlet Header/Tube Nozzles resulting in repetitive forced plant shutdowns, TVA decided to replace the two Outlet Headers (one for each furnace) in Fall 2008 during a reliability outage. Since the entire Main Steam piping system was installed with cold pull at almost every longitudinal pipe segment, the main challenge from the engineering mechanics point of view was how to restrain the piping system especially at the Crossover Outlet Links inside each furnace Penthouse. Further constructability reviews indicated that there were not enough adjacent steel frames inside each furnace to restrain the four Crossover Outlet Links in the three global directions during the Outlet Headers replacement inside each Penthouse. The only existing steel above the Crossover Outlet Links is embedded in asbestos insulation, and the removal of the insulation to provide access for the temporary restraints was determined to be costly and time consuming. The insulation removal would have also caused the scheduled outage to be extended significantly and unrealistically. After careful assessment, technical evaluation, and several constructability reviews; it was decided to take an unconventional approach for relieving the inherent cold pull in three global directions by cutting the four Mixing Headers outside each furnace. In addition, the concept of installing several temporary restraints was utilized for the vertical and lateral directions inside the furnace Penthouse, as well as several others outside the Boiler to control the piping configuration of the four Mixing Headers. This approach achieved two purposes: 1- relieving the inherent cold pulls in three global directions and 2- controlling the four Outlet Links pipe end positions with respect to the new Superheat Pendant Outlet Header nozzles. This unconventional method used to relieve the piping cold pull from outside the Boilers, to control the Outlet Links movements inside the Boiler Penthouses, and to restrain the entire Main Steam piping system was successfully developed and implemented in the Fall 2008 reliability outage to replace the two Superheat Pendant Outlet Headers. This unconventional method is described in this paper.
APA, Harvard, Vancouver, ISO, and other styles
9

Alvino, Antonello, Alessandra Antonini, Daniela Lega, Canio Mennuti, and Andrea Tonti. "Damage Characterization of Heat Resistant Steels After Long Service in Reforming Plants." In ASME 2016 Pressure Vessels and Piping Conference. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/pvp2016-63555.

Full text
Abstract:
ASTM A 297 grade HP steels are widely employed for radiant tubes in reforming furnaces: this class of heat resistant alloys shows high creep and corrosion resistance, ensuring good performances in extreme pressure and temperature conditions. The typical microstructure of such materials is an austenitic matrix surrounded by a network of interdendritic carbides, which contain chromium and other carbide forming elements, namely Nb, Ti, W, Zr and Y. During long service life, these high strength materials may suffer aging or even severe damage, especially when process conditions allow coke deposition, or maintenance procedures are not carried properly. Service aging can be summarized, for HP steels, in terms of microstructure degradation: coalescence and coarsening of interdendritic precipitates, precipitation of secondary carbides in the austenite matrix and transformation of niobium-rich carbides in the G-phase silicide are the typical phenomena occurring on the microstructure of these alloys during service. Carburization can also occur in radiant tubes, since their inner wall side is exposed to hydrocarbon-rich process fluids: carbon diffuses into the metal matrix, causing massive precipitation of chromium-rich carbides. The alloy corrosion resistance is then reduced, resulting in surface attack, cracks development and a general wastage of the material. Furthermore, the high temperatures, which tubes are exposed to, can also induce creep, especially if a local tube overheating occurs: cavities and microcracks, mainly localized at precipitates, are the typical evidences of creep damage on HP steels. The present work is aimed on the damage characterization of several radiant tubes in HP alloys, after long term service aging in reforming plants. We employed optical and electron microscopy, EDX elements mapping and mechanical tests, in order to characterize and evaluate the various damages affecting the alloys. Microstructure evolution has been detected in all the analyzed tubes, but we found that such a phenomenon was strictly influenced by the chemical composition of each alloy, so that in presence of small amounts of titanium and tungsten, the chemical evolution of the secondary phases was appreciably contained. Creep also was observed in all the investigated tubes and its extent was found to be related to both alloy composition and process conditions. These latter have assumed to be the main driving factor for carburization, since we observed that slight differences in temperature, pressure, chemical composition of the process fluid and tube maintenance dramatically conditioned the performances of each tube. Massive precipitation and material degradation, in fact, were found in some cases, but, on the other side, no appreciable evidence of carburization damage was observed on other cases.
APA, Harvard, Vancouver, ISO, and other styles
10

Kokel, Philip, Craig Weinschenk, and O. A. Ezekoye. "Evaluation of Directional Flame Thermometer for Real-Time Inversion of Heat Flux." In 2010 14th International Heat Transfer Conference. ASMEDC, 2010. http://dx.doi.org/10.1115/ihtc14-22917.

Full text
Abstract:
The Directional Flame Thermometer (DFT) is often used to measure heat flux during room fire testing. In literature and practice, heat transfer solutions for the DFT have been post processed. It is important to develop real-time capability for calculating heat flux based on measured temperatures as such capability will allow control of fire testing furnaces. In this study, we show that if a user will accept moderate errors in the heat flux, then a simple forward solution methodology allows heat flux measurements to be made in real-time. Essentially, the “inverse” problem is sufficiently well-conditioned to allow for a simple solution. Both a simple spreadsheet type solution and a finite difference code were used to generate the heat flux. The code was verified in both forward and inverse senses. The calculations were verified through a convergence study of both the forward and inverse solutions in spatial discretization (dx) and temporal discretization (dt). The inverse solution showed expected convergence behavior in both spatial and temporal discretization. In all cases, the solution for the front plate produced a maximum error of around 5%, which decreased as the DFT reached a steady state temperature. The forward and inverse models were validated through experimental testing using a radiant heater panel. The inverse model’s calculations were compared to measurements from a Schmidt-Boelter gage. The front plate heat flux measurements of the DFT matched reasonably well with the Schmidt-Boelter gage (2–6% difference) during the majority of the testing. The heat flux was then used to drive a forward simulation, and the forward model’s calculations were compared to actual temperature data acquired by the tests, producing a difference no greater than 4%. The DFT was also placed into a room fire to evaluate its effectiveness in this environment. The DFT was placed near a sand burner and in a panel fire test. The DFT produced reasonable heat flux values, but had more noise than results from those in front of the radiant heater panel (standard deviation of 1500 W/m2 compared to 400–600 W/m2).
APA, Harvard, Vancouver, ISO, and other styles
You might also be interested in the extended bibliographies on the topic 'Radiant Furnaces' for particular source types:
Journal articles
We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!

To the bibliography