Log in

Relevant bibliographies by topics / Radiant Furnaces / Journal articles

To see the other types of publications on this topic, follow the link: Radiant Furnaces.

Journal articles 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 top 50 journal articles for your research 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.

Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.

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

11

Mochida, A., K. Kudo, Y. Mizutani, M. Hattori, and Y. Nakamura. "Transient heat transfer analysis in vacuum furnaces heated by radiant tube burners." Energy Conversion and Management 38, no. 10-13 (July 1997): 1169–76. http://dx.doi.org/10.1016/s0196-8904(96)00146-x.

Full text

APA, Harvard, Vancouver, ISO, and other styles

12

Naumkin, E. A., and J. N. Shermatov. "Regularities of Changes in the Mechanical Characteristics and Electrical Properties of the Reaction Furnaces Coils Material during Operation." Materials Science Forum 992 (May 2020): 706–11. http://dx.doi.org/10.4028/www.scientific.net/msf.992.706.

Full text

Abstract:

The main causes of early failure of reaction furnaces coils are diffusion processes in the material as a result of which structural changes occur, new phases are formed and void structure is formed in the surface layers of the metal, which has a negative effect on the mechanical characteristics. In this regard as a structurally sensitive method, which allows evaluating the changes occurring in the metal, the response parameters of the electrical signal are used which are sensitive to pore formation and allow predicting the zone of formation of the breaking crack. Fragments of the coils of the reaction furnaces from the radiant section, which were in operation for 750, 1300, 8000, and 10000 hours and the pipe element in the delivery condition were chosen as the objects of the study. As a result of the research a correlation between the amplitude of the first harmonic of the electrical signal output voltage with the results of static tests for tensile and impact bending was established. This happens due to the fact that during operation there is an increase in the relative impact viscosity and relative tensile strength, and the relative magnitude of the voltage amplitude of the first harmonic of the output electrical signal also increases. These results can be used as a method of mechanical properties assessment by non-destructive testing, and also they can be used to develop a criterion for the rejection of reaction furnace coils.

APA, Harvard, Vancouver, ISO, and other styles

13

Issa, B., V. Yu Bazhin, N. M. Telyakov, and A. N. Telyakov. "Increasing of corrosion resistance of radiant coiled-pipes in tubular furnaces at crude oil refinery." Corrosion: Materials, Protection, no. 8 (August 21, 2019): 7–12. http://dx.doi.org/10.31044/1813-7016-2019-0-8-7-12.

Full text

APA, Harvard, Vancouver, ISO, and other styles

14

Aliprandi, Placido, Eugenio Guglielmino, and Andrea Sili. "Damage assessment of topping furnaces radiant tubes and creep behaviour of ASTM A335 P5 steel." Materials at High Temperatures 37, no. 2 (December 14, 2019): 81–88. http://dx.doi.org/10.1080/09603409.2019.1702365.

Full text

APA, Harvard, Vancouver, ISO, and other styles

15

Santos, M., M. Guedes, R. Baptista, V. Infante, and R. A. Cláudio. "Effect of severe operation conditions on the degradation state of radiant coils in pyrolysis furnaces." Engineering Failure Analysis 56 (October 2015): 194–203. http://dx.doi.org/10.1016/j.engfailanal.2015.02.010.

Full text

APA, Harvard, Vancouver, ISO, and other styles

16

Lopato, L. M., A. V. Shevchenko, A. A. Frolov, and V. P. Red'ko. "Fusion and Dispersion of Oxide Materials in a “Cold” Crucible and in Furnaces with Concentrated Radiant Heating." Powder Metallurgy and Metal Ceramics 44, no. 7-8 (July 2005): 335–40. http://dx.doi.org/10.1007/s11106-005-0099-x.

Full text

APA, Harvard, Vancouver, ISO, and other styles

17

Garashchenko, A. N., A. V. Vinogradov, I. Z. Dashtiev, N. V. Kobylkov, and S. A. Terekhov. "Using a radiant heat test facility to study the options for the fire protection of structures involving coiled MBOR basalt fiber material." Pozharovzryvobezopasnost/Fire and Explosion Safety 29, no. 6 (January 13, 2021): 28–39. http://dx.doi.org/10.22227/pvb.2020.29.06.28-39.

Full text

Abstract:

Introduction. Coiled MBOR basalt fiber material is used to demonstrate the potential of research into the fire protection of structures using a radiant heat test facility. Research methods. A set of high-power halogen lamps is used to simulate a high temperature impact. The heating intensity is adjusted by changing the voltage applied to the lamps, and it is controlled by the thermocouples that record the temperature of the heated surface of a fire proofing material. The studies have proven efficient for various types of fire proofing and various structures. They are especially relevant in providing rational fire protection of polymer composite structures having relatively low thermal resistance (80…120 °С) due to the fact that they are rarely tested in fired furnaces. Results and discussion. Several options of multilayered MBOR-20F fire proofing were tested. Dependences between time, on the one hand, the surface temperature of protected elements (200 × 300 × 20 mm polyurethane plates), and the temperature between the layers of the fire-proofing material, on the other hand, are presented under standard temperature conditions. Fire protection efficiency improvement by PLAZAS fire-resistant adhesive compound, applied between MBOR layers, is demonstrated. This fireproofing method is applicable not only to metal structures. It demonstrates high fireproofing properties and has a strong potential if applied to fireproof polymer composite structures and products. The measurements, taken by thermocouples in the course of a session of tests, can be used to estimate the thermophysical properties of fireproofing materials exposed to high temperatures, which are rare in most cases, although they are necessary for a thermal analysis. It is demonstrated that similar experiments can also be carried out at nonstandard heating temperatures (for example, when the combustion of fossil fuels is imitated). Conclusions. Experiments, conducted using the radiant heat test facility, and thermal engineering calculations allow to accelerate the selection of the optimal fire protection option and identification of the fireproofing thickness. Moreover, this method allows to reasonably minimize the number of costly fired furnace tests using fullscale samples of fireproofed structures and products.

APA, Harvard, Vancouver, ISO, and other styles

18

Yadav, Rahul, C. Balaji, and S. P. Venkateshan. "Inverse estimation of number and location of discrete heaters in radiant furnaces using artificial neural networks and genetic algorithm." Journal of Quantitative Spectroscopy and Radiative Transfer 226 (March 2019): 127–37. http://dx.doi.org/10.1016/j.jqsrt.2018.12.031.

Full text

APA, Harvard, Vancouver, ISO, and other styles

19

Taymarov, M. A., V. K. Ilyin, E. G. Chiklyaev, and R. G. Sungatullin. "Features of application of the methane-hydrogen fraction as fuel for thermal power plant boiler." Power engineering: research, equipment, technology 21, no. 3 (November 29, 2019): 109–16. http://dx.doi.org/10.30724/1998-9903-2019-21-3-109-116.

Full text

Abstract:

The methane-hydrogen fraction is a gaseous hydrocarbon by-product during oil processing for obtaining petroleum products. Until recently, the methane-hydrogen fraction was used as furnace oil in internal technological processes at a refinery. Some of the low-calorie methane-hydrogen fraction was burned in flares. Driven by the prospect of the methane-hydrogen fraction use as a fuel alternative to natural gas for burning in thermal power plants boilers, it became necessary to study the methane-hydrogen fraction combustion processes in large volumes. The conversion of ON-1000/1 and ON-1000/2 furnaces from the combustion of the methane- hydrogen fraction with combustion heat of 25.45 MJ/m3 to the combustion of the composition with combustion heat of 18.8 MJ/m3 leads to a decrease in temperature in the flame core for 100 °C as an average. The intensity of flame radiation on the radiant tubes decreases. Therefore, the operation of furnaces during combustion of methane-hydrogen fraction with a low heat of combustion at the gas oil hydro-treating unit is carried out only with a fresh catalyst, which allows lower flame temperatures in the burner.The experiments to determine the concentration of nitrogen oxides NOx and the burning rate w of the methane-hydrogen fraction in the ON-1000/1 furnace and natural gas in the TGM-84A boiler, depending upon the heat of combustion Qnr were carried out. The obtained results showed that the increase in the hydrogen content Н2 from 10.05 % to 18.36% (by mass) results in an increase in the burning rate w by 45%. The burning rate of natural gas with methane CH4 content of 98.89% in the TGM-84A boiler is 0.84 m/s, i.e. it is 2.5 times lower than the burning rate of the methane- hydrogen fraction with H2 content of 10.05%. The distributions of heat flux from the flame qf over the burner height h in the TGM-84A boiler were obtained in case of natural gas burning and calculation of burning of the methane-hydrogen fraction with a hydrogen content of 10.05% and methane of 28.27%. The comparison of the obtained data shows that burning of methane- hydrogen fraction causes an increase in the incident heat flux qf at the outlet of the burner.

APA, Harvard, Vancouver, ISO, and other styles

20

Abdullin, A. M., and D. B. Vafin. "Numerical modeling of local heat transfer in the furnaces of tubular ovens, based on differential approximations for radiant heat transfer." Journal of Engineering Physics 60, no. 2 (February 1991): 237–42. http://dx.doi.org/10.1007/bf00873071.

Full text

APA, Harvard, Vancouver, ISO, and other styles

21

Nizhegorodov, A. I. "Modeling the Transfer of Radiant Energy to a Bulk Medium in Electric Furnaces with the Upper Position of Radiating Elements." Refractories and Industrial Ceramics 61, no. 1 (May 2020): 25–30. http://dx.doi.org/10.1007/s11148-020-00426-y.

Full text

APA, Harvard, Vancouver, ISO, and other styles

22

Biryukov, A. B., and Yu A. Ruban. "Method for determining blast furnace tuyere zone blackness degree on pulverized coal fuel injection." Vestnik IGEU, no. 2 (2019): 25–31. http://dx.doi.org/10.17588/2072-2672.2019.2.025-031.

Full text

Abstract:

Pulverized coal fuel (PCF) supply is one of the modern methods of improving the cast iron production technology in blast furnaces (BF). It has a significant effect on the heat exchange in the tuyere zone (TZ). The known method of radiant heat transfer calculation in TZ accounts only for the ash particle effect on the TZ blackness degree. The aim of this work is to develop a method for determining TZ blackness degree and to investigate the effect of different factors on this value. The work was based on the elements of the proven method of calculating heat exchange in boiler furnaces. Parametric sensitivity was investigated by alternately simulating an error in each of the input values and determining its effect on the sought value. By analysing the processes, the authors have derived dependences for obtaining the concentration of ash particles and triatomic gases and determined the degrees of TZ blackness by Bouguer’s law simultaneously taking into account the radiation of the burning coke and ash particles, and triatomic gases. It has been established that an increase in the PCF consumption from 0 to 250 kg/t of pig iron changes the TZ blackness degree from 0,067 to 0,243; and a 1 % increase in the pressure, concentration of triatomic gases, ray effective length, TZ temperature and ash particle size changes the TZ blackness by 0,714 %, 0,151 %, 0,72 %, –1,557 % and –0,176 %, respectively. The calculations have shown that the effects of coke particles, triatomic gases and ash particles on the sought value are approximately equal. In contrast, when the conventional method is applied, it results in an approximately 2-time underestimation of the values, while even for evaluation calculations, the maximum permissible error is 10–15 %. The developed method accounting for all factors has the maximum error of 5 %. It is important for designing tuyeres and TZ refrigerators.

APA, Harvard, Vancouver, ISO, and other styles

23

Büschgens, D., N. K. Karthik, C. Schubert, N. Schmitz, and H. Pfeifer. "Investigation of the Influence of Proximal Radiation on the Thermal Stresses and Lifetime of Metallic Radiant Tubes in Radiation-Dominated Industrial Furnaces." HTM Journal of Heat Treatment and Materials 74, no. 6 (December 11, 2019): 392–405. http://dx.doi.org/10.3139/105.110399.

Full text

APA, Harvard, Vancouver, ISO, and other styles

24

Darvishvand, Leila, Babak Kamkari, and Farshad Kowsary. "Optimal design approach for heating irregular-shaped objects in three-dimensional radiant furnaces using a hybrid genetic algorithm–artificial neural network method." Engineering Optimization 50, no. 3 (May 16, 2017): 452–70. http://dx.doi.org/10.1080/0305215x.2017.1323889.

Full text

APA, Harvard, Vancouver, ISO, and other styles

25

Chicherin, Stanislav, Lyazzat Junussova, Timur Junussov, and Chingiz Junussov. "Comparing strategies for improving thermal performance of an existing district heating (DH) network: low temperature DH in Omsk, Russia." E3S Web of Conferences 173 (2020): 03001. http://dx.doi.org/10.1051/e3sconf/202017303001.

Full text

Abstract:

In Russia district heating (DH) systems are characterized by the high wear-out rate of key facilities, particularly energy distribution networks and plants, the inadequate reliability of operation, significant heat losses, and the polluting impact on the environment. The objective of this paper is to indicate the feasibility and advantage of the renovation on a traditional high-temperature DH network. All the calculations are performed in Zulu©, Russian commercial software for simulation of a district energy system’s behavior. Reference operational data for the DH system was obtained from database established by the local heat supply company in the form of Microsoft Office Excel spreadsheet file. The second idea (Case-2) envisages installing a heat pump and increasing the supply temperature in peak load periods during the heating season to limit a size of a heat pump. Case-3 and -4 are related to installing in-room terminal units and operating the system ‘as is’ respectively. Terminal units include consoles, fan-coils, blower coils, furnaces, chimneys, and radiant panels. The fifth option introduces low temperature district heating (LTDH) concept representing a paradigm shift in DH development and features a low supply temperature and smart control. When designing all errors should be less than local regulations allowable for each object. Presented research revealed that the issue of modernisation in Omsk, Russia cannot be easily and clear resolved. The future state-determination of results of DH network retrofitting is innovatively proposed in this paper.

APA, Harvard, Vancouver, ISO, and other styles

26

Zhou, G. Y., Fei Du, and Gao Su. "Study of Relationship between Supercharged Boiler’s Furnace Temperature, Radiant Rate and Boiler’s Operation Parameters." Applied Mechanics and Materials 220-223 (November 2012): 803–7. http://dx.doi.org/10.4028/www.scientific.net/amm.220-223.803.

Full text

Abstract:

In this paper, visualization detection technology of supercharged boiler’s combustion in furnace is been used to take photo of the flame in furnace, and calculate temperature images and radiant rate images corresponding to flame images, and get average temperature and average radiant rate value, and gain relationship between average temperature and average radiant rate value. Studies show that: according to image of flame in furnace taken in different working conditions, average temperature and average radiant rate value have the same change rule. Working condition of boiler is higher, fuel consumption and radiant temperature are higher, and average radiant rate is lower, and operation parameters such as fuel press, steam temperature and pressure difference of gas are higher, and vice versa.

APA, Harvard, Vancouver, ISO, and other styles

27

Andres, Blanca, Karlis Livkiss, Juan P. Hidalgo, Patrick van Hees, Luke Bisby, Nils Johansson, and Abhishek Bhargava. "Response of stone wool–insulated building barriers under severe heating exposures." Journal of Fire Sciences 36, no. 4 (July 2018): 315–41. http://dx.doi.org/10.1177/0734904118783942.

Full text

Abstract:

This article presents the experimental results of stone wool–layered sandwich constructions, with either steel or gypsum claddings, tested under four different heating exposures: 7 kW/m2 incident radiant heat flux exposure, 60 kW/m2 incident radiant heat flux exposure, parametric time–temperature curve exposure and ISO 834 standard time–temperature exposure. The test apparatus used were a movable radiant panel system, a mid-scale furnace (1.5 m3) and a large-scale furnace (15 m3). The results show that reduced-scale tests are capable of reproducing the heat transferred through the construction at large scale provided there is limited mechanical degradation. The results indicate that the availability of oxygen is fundamental to the fire behaviour of the sandwich composites tested. Reactions occurring in stone wool micro-scale testing, such as oxidative combustion of the binder or crystallisation of the fibres, have a limited effect on the temperature increase when wool is protected from air entrainment.

APA, Harvard, Vancouver, ISO, and other styles

28

Martiani, Erni, Murad, and Guyup Mahardhian Dwi Putra. "Modification and Test Performance of Rack Type Hybrid (Solar-Biomass) Dryer." Jurnal Ilmiah Rekayasa Pertanian dan Biosistem 5, no. 1 (July 30, 2017): 339–47. http://dx.doi.org/10.29303/jrpb.v5i1.45.

Full text

Abstract:

This study aimed to modify biomass furnaces source of heat energy from the combustion of biomass, study thermal energy generated from combination of solar and biomass energy, and determine efficiency of furnaces and efficiency of total system of a rack type hybrid (solar-biomass) dryer. Method used in this research was experimental method. Used fuel was coconut shell charcoal and used tools include iron plate, blower, pipe, grinding and welding tools, thermometer, anemometer, lux meter, data logger and analytical balance. Observed parameters were temperature, air humidity, sun radiation, velocity and flow rate of hot air towards the drying chamber, drying period, energy loss and energy produced inside the furnace. Modification made by adding drawer shaped biomass furnace with 0.65 m length, 0.65 m wide and 0.25 m height. The furnace was equipped with a chimney and blower. Results from the test performance showed that this tool yield total heat loss of 18,173.15 KJ at the upright furnace wall. Whereas heat loss at furnace floor was 4380.899 KJ. Energy consumption was 151,602.064 for solar energy and 48,399.4 KJ for biomass energy, with total drying energy generated by solar energy and biomass i.e. 200,001 KJ. Efficiency value of the drying system was 19% with 30% furnace efficiency. Keywords: Hybrid dryer, heat loss, biomass furnaces ABSTRAK Penelitian ini bertujuan untuk memodifikasi tungku biomassa sebagai tempat sumber energi panas dari pembakaran biomassa, mempelajari energi panas yang dihasilkan oleh kombinasi energi surya dan energi biomassa, dan mengetahui efisiensi tungku dan efisiensi total sistem pada alat pengering hybrid (surya-biomassa) tipe rak. Metode yang digunakan dalam penelitian ini yaitu metode eksperimental. Bahan bakar yang digunakan yaitu arang tempurung kelapa dan alat yang digunakan antara lain plat besi, blower, pipa, gerinda, las, thermometer, anemometer, lux meter, data logger, dan timbangan analitik. Parameter yang diamati terdiri dari suhu, kelembaban udara, radiasi matahari, kecepatan aliran udara panas menuju ruang pengering, debit aliran udara menuju ruang pengering, lama waktu pengeringan, kehilangan energi pada tungku dan energi yang dihasilkan. Modifikasi yang dilakukan adalah menambahkan tungku biomassa yang berbentuk seperti laci dengan ukuran panjang 0,65 m, lebar 0,65 m dan tinggi 0,25 m. Tungku ini dilengkapi dengan cerobong asap dan blower. Hasil pengujian alat ini diperoleh total kehilangan panas pada dinding tegak tungku 18.173,15 KJ, sedangkan kehilangan panas pada lantai tungku 4.380,899 KJ. Konsumsi penggunaan energi, yaitu energi surya 151.602,064 KJ dan energi biomassa 48.399,4 KJ dengan total energi pengeringan yang dihasilkan oleh energi surya dan biomassa sebesar 200.001 KJ. Nilai efisiensi sistem pengeringan yang dihasilkan yaitu 19% dengan efisiensi tungku 30%. Kata kunci: alat pengering Hybrid, kehilangan panas, tungku biomassa

APA, Harvard, Vancouver, ISO, and other styles

29

SEKIYA, Kozo, Yasuo HOSHINA, Osamu TAKAMORI, Akira KAWABATA, Katsuhiko SANNOMIYA, Kohei GOTO, and Toshiaki MATSUKAWA. "Development of open radiant tube type reheating furnace." Transactions of the Iron and Steel Institute of Japan 25, no. 9 (1985): 972–76. http://dx.doi.org/10.2355/isijinternational1966.25.972.

Full text

APA, Harvard, Vancouver, ISO, and other styles

30

Zainullin, L. A., M. V. Kalganov, D. V. Kalganov, N. B. Loshkarev, A. R. Fatkhutdinov, and A. I. Pugin. "Furnace electric heaters with radiant-convective heat transfer." Steel in Translation 45, no. 3 (March 2015): 221–23. http://dx.doi.org/10.3103/s0967091215030158.

Full text

APA, Harvard, Vancouver, ISO, and other styles

31

Dimastiar, Moch Ardi, Ahmad Taufik, and Anne Zulfia Syahrial. "Failure Analysis of Tube Radiant Heater Hot Oil in Refinery Industry." MATEC Web of Conferences 269 (2019): 03013. http://dx.doi.org/10.1051/matecconf/201926903013.

Full text

Abstract:

Heater, known as a furnace or fired heater is used to heat the oil which flows through tubes around a flame. When the tubes are failed, the fired heater reliability is affected. This paper investigates the probable cause/ causes of the radiant tube failure in the fired heater. In that context, depth analysis is conducted as part of the investigative studies, involve visual observation and dimensional measurement, metallographic examination, and chemical analysis. Finally, it has been concluded that the tube radiant has mainly failed due to crevice corrosion. In the other side, spherodization and external corrosion are also found as other failure contributors.

APA, Harvard, Vancouver, ISO, and other styles

32

Zhang, Xi Lai, and Wei Yao. "Heat Recovery and Burner Modification of an Industrial Tubular Furnace." Applied Mechanics and Materials 737 (March 2015): 296–300. http://dx.doi.org/10.4028/www.scientific.net/amm.737.296.

Full text

Abstract:

The air preheater was installed on the furnace to decrease the exhaust gas temperature and heat the air to about 290°C. A radiant cylinder was added to the radiation section. Swirl flames were formed by adjusting the shape and the installation angles of the burner flame tubes. The radiation heat transfer was strengthened and the heat absorption was enhanced in the radiation section, while the temperature at the outlet of the furnace was decreased. Thus energy was saved by 16.7%.

APA, Harvard, Vancouver, ISO, and other styles

33

Minea, Adriana, and Adrian Dima. "Saving energy through improving convection in a muffle furnace." Thermal Science 12, no. 3 (2008): 121–25. http://dx.doi.org/10.2298/tsci0803121m.

Full text

Abstract:

Incompressible forced convection heat transfer problems normally admit an extremely important simplification: the fluid flow problem can be solved without reference to the temperature distribution in the fluid. Thus, it can first find the velocity distribution and then put it in the energy equation as known information and solve for the temperature distribution. In this paper it is intended to expand the theoretic researches concerning heat processes intensification and their use in industrial practice. In conclusion the fundamental research with concrete technical applications represents a significant contribution to the development of knowledge in domain. By centralizing the experimental results, there can be said that there has been obtained an energetic saving of approximate 20% by using radiant panels. By fitting the experimental data there has been obtained an optimum of the panels' positioning of x = 118.71 mm. In conclusion, changing the working space by introducing some radiant panels inside the furnace leads to important energy savings in the heating process, by increasing the heating rate of charge and by decreasing its residence time in the thermal equipment.

APA, Harvard, Vancouver, ISO, and other styles

34

GRANET, IRVING. "THE CALCULATION OF RADIANT HEAT ABSORPTION IN A FURNACE." Journal of the American Society for Naval Engineers 65, no. 2 (March 18, 2009): 319–26. http://dx.doi.org/10.1111/j.1559-3584.1953.tb05856.x.

Full text

APA, Harvard, Vancouver, ISO, and other styles

35

Ha, Won, Jaehyun Ha, Yonghoon Roh, and Youngseog Lee. "Improvement of Radiant Heat Efficiency of the Radiant Tube Used for Continuous Annealing Line by Application of Additive Manufacturing Technology." Applied Sciences 10, no. 22 (November 17, 2020): 8132. http://dx.doi.org/10.3390/app10228132.

Full text

Abstract:

This study presents the application of additive manufacturing (AM) technology to a W-type INCONEL radiant tube (RT) used to improve its radiant heat efficiency. Appropriate dimensions of honeycomb structure were determined from finite element (FE) analysis and the resulting increase in radiant heat was computed. The honeycomb patterns on the RT surfaces were printed using the directed energy deposition (DED) method. Radiant heat efficiency of a prototype RT with a honeycomb pattern printed was examined in a pilot furnace emulating the continuous annealing line (CAL). Finally, soundness of the prototype RT was tested on-site on the actual the CAL of No. 3 CGL in POSCO Gwangyang Steel Works. The results revealed that partial FE analysis, which predicts the amount of radiant heat by partially modeling the RT structure rather than modeling the entire RT structure, is suitable for overcoming the limitation of the computer memory capacity and calculating the design parameters of honeycomb patterns. The DED is suitable for printing honeycomb patterns on RT with large and curved surfaces. The average amount of gas consumed to maintain 780 °C and 880 °C for 1440 min was reduced by 10.42% and 12.31%, respectively. There were no cracks and no gas leaks on the RT surface in an annual inspection over three years.

APA, Harvard, Vancouver, ISO, and other styles

36

He, Hong Zhou, Huang Huang Zhuang, Zhi Wei Li, and Zheng Zou. "Waste Energy Recovery from a Silicon Smelting Furnace — Technology Design and Economic Analysis." Advanced Materials Research 518-523 (May 2012): 3993–98. http://dx.doi.org/10.4028/www.scientific.net/amr.518-523.3993.

Full text

Abstract:

In order to improve the overall efficiency of energy utilization in silicon smelting furnace, a technology solution to recover the furnace radiant heat and exhaust energy was described in this paper; and based on the operation data of a 3200 KV•A industrial silicon smelting furnace, a 400 kW steam turbine generator unit was designed, and the economic benefit from the technology solution was also analyzed. The results show that this technology solution brings a remarkable performances of energy saving and emission reduction: about 14% of the supplying energy could be recovered; the investment payback period is between two and three years, the economic benefit from the technology solution would reach 4.72 million yuan in ten years.

APA, Harvard, Vancouver, ISO, and other styles

37

Ban, Cai Ying, Xu Ao Lu, Jian Meng Yang, Xu Ran, and Feng Ying Liang. "The Partition Period of Thermodynamic Calculation and the Numerical Simulation for Lignite Blended Supercritical Boiler." Advanced Materials Research 1030-1032 (September 2014): 648–52. http://dx.doi.org/10.4028/www.scientific.net/amr.1030-1032.648.

Full text

Abstract:

The purpose of this paper is to study the impact of furnace temperature and load after blending in lignite, based on CFD software FLUENT-6.3,this paper choose the appropriate geometry model and the physical and mathematical models, and numerical simulation of the different conditions 600MW supercritical once-through boiler blending lignite furnace combustion process is curried out. And through a 600MW supercritical coal-fired boiler furnace lignite blended performed sections thermodynamic calculation under different conditions, worked out the furnace flue gas temperature, CO, CO2concentration distribute trend and radiant heat each section surface heat load conditions. The specific amount were blended with 5%, 10%, 15%, 20% were not dried lignite and dried lignite 20% after five conditions. And obtained a conclusion is the temperature and radiation heating surface flue gas heat load in the overall trend under the various conditions.

APA, Harvard, Vancouver, ISO, and other styles

38

Ul-Hamid, Anwar, Hani M. Tawancy, Abdul-Rashid I. Mohammed, and Nureddin M. Abbas. "Failure analysis of furnace radiant tubes exposed to excessive temperature." Engineering Failure Analysis 13, no. 6 (September 2006): 1005–21. http://dx.doi.org/10.1016/j.engfailanal.2005.04.003.

Full text

APA, Harvard, Vancouver, ISO, and other styles

39

Detkov, S. P. "Radiant heat transfer in a furnace with two volume zones." Journal of Engineering Physics 59, no. 1 (July 1990): 936–41. http://dx.doi.org/10.1007/bf00871336.

Full text

APA, Harvard, Vancouver, ISO, and other styles

40

Zhou, G. Y., Gao Su, Fei Du, and Zhong Gen Li. "Simulation of Supercharged Boiler Combustion Optimization Control Based on Radiant Energy Signal." Advanced Materials Research 614-615 (December 2012): 8–13. http://dx.doi.org/10.4028/www.scientific.net/amr.614-615.8.

Full text

Abstract:

According to the phenomenon that large lagging and the fluctuation of the fuel regulation of the supercharged boiler, the dynamic behavior of the steam pressure is simulated to study the internal pure delaying in this paper. The flame detector system was used to collect the real-time picture of the flame in the boiler furnace, and the radiant energy signal was introduced into the combustion control system. A combustion auxiliary duct pilot was added and some stimulation is studied. The results shows that with the change of the radiant energy signal, the new control system can change the supply of the fuel in 20 seconds and wipe off all the disturbance in 30 seconds and the amplitude of fluctuation is dramatically reduced.

APA, Harvard, Vancouver, ISO, and other styles

41

Aleksandrov, A. V., and V. V. Aleksandrov. "Improving the quality of alumina-containing sinter using water-cooled furnace shell." Science of Sintering 44, no. 3 (2012): 281–86. http://dx.doi.org/10.2298/sos1203281a.

Full text

Abstract:

This article deals with the use of computer modeling to develop technical solutions to ensure better quality of alumina-containing sinter. The simulation accounted for the influence of the feed materials on the thermal processes in the furnace. The energy balance (including thermal conductivity, heat convection and radiant heat exchange) was solved assuming steady state. A good correlation was observed for the actual and calculated temperatures of the solids and gases, with less than 15% discrepancy. Using the model of the furnace investigated the possibility of lowering the temperature of sintering by removing heat from the outside of the furnace shell. To reduce the sintering temperature to 1000 ?C length of the refractory lined steel is 5 m, the height of the lining should not exceed - 0.06 m, the required rate of cold water - 54.7 m3/h

APA, Harvard, Vancouver, ISO, and other styles

42

Wen, Liang-ying, Chen-guang Bai, Yang-qi Ou, Deng-fu Chen, and Gui-bao Qiu. "Radiant Image Simulation of Pulverized Coal Combustion in Blast Furnace Raceway." Journal of Iron and Steel Research International 13, no. 2 (February 2006): 18–21. http://dx.doi.org/10.1016/s1006-706x(06)60036-8.

Full text

APA, Harvard, Vancouver, ISO, and other styles

43

Chopade, Ramchandra P., Subhash C. Mishra, Pinakeshwar Mahanta, and Shegenao Maruyama. "On Configuration of Load in Radiant Furnace for Uniform Thermal Conditions." Heat Transfer Engineering 35, no. 1 (August 14, 2013): 94–109. http://dx.doi.org/10.1080/01457632.2013.810461.

Full text

APA, Harvard, Vancouver, ISO, and other styles

44

Tamura, Minoru, and Daizo Kunii. "Procedure for Calculating Radiant Heat Transfer in a Combustion-Heating Furnace." KAGAKU KOGAKU RONBUNSHU 18, no. 2 (1992): 182–88. http://dx.doi.org/10.1252/kakoronbunshu.18.182.

Full text

APA, Harvard, Vancouver, ISO, and other styles

45

Ramamurthy, H., S. Ramadhyani, and R. Viskanta. "A thermal system model for a radiant-tube continuous reheating furnace." Journal of Materials Engineering and Performance 4, no. 5 (October 1995): 519–31. http://dx.doi.org/10.1007/bf02649583.

Full text

APA, Harvard, Vancouver, ISO, and other styles

46

Feng, Qianqian, FL Zhu, and Jianfeng Hu. "Estimation of the radiant performance of flame-retardant fabrics considering thermal degradation effect." Journal of Engineered Fibers and Fabrics 14 (January 2019): 155892501984361. http://dx.doi.org/10.1177/1558925019843615.

Full text

Abstract:

Specially designed thermal protective clothing is used by firefighters and furnace operators for safety against intense heat flux exposures. Radiative transfer becomes the main heat transfer mode under such high temperature conditions. This work dealt with the effects of thermal degradation on the radiant protective performance and radiative properties of Polysulfonamide and Nomex IIIA fabrics at virgin state and pyrolyzed state, respectively. Simultaneously, the thermal stability and flame retardancy of both fabrics were compared by using thermogravimetry, vertical burning test, and limit oxygen index methods. The obtained results of thermal degradation effect on radiative properties demonstrated that both of the reflectance and transmittance of the two kinds of fabrics at virgin condition are higher than those at pyrolyzed state. On the other hand, the radiant protective performance values of both fabrics at charred condition were lower as compared to those at virgin state. This study will be helpful to estimate the continuing performance of firefighters’ protective fabrics after thermal exposures during firefighting operations.

APA, Harvard, Vancouver, ISO, and other styles

47

V. Aleksandrov, Alexander, and Valera V. Aleksandrov. "Using CFD model of furnace for improvement of the quality of alumina-containing sinter." Engineering Computations 31, no. 1 (February 25, 2014): 48–58. http://dx.doi.org/10.1108/ec-02-2012-0029.

Full text

Abstract:

Purpose – The purpose of the study is to improve the quality of alumina-containing sinter produced in a rotary kiln. Simulating sintering furnace assessment of technical solutions aimed at creating optimal phase composition of clinker. Design/methodology/approach – The computer model of the sintering furnace is developed. Influence of characteristics of material streams on thermal processes in the furnace was considered. Balance of energy, including heat conductivity, convection and radiant heat exchange has been solved in a stable state. Between actual and calculated variables of work of the furnace, good correlation was observed. Findings – The evaluation of the effect of increasing primary air and fuel burner extension to changes in temperature of the material. The modeling found that the most effective solution to reduce the temperature of the sinter is lengthening fuel burner to 5 m. Practical implications – The model can be applied to analyze and optimize the alteration of temperatures of materials and gases in an industrial furnace under various conditions. Originality/value – The article provides new information for specialists in the production of alumina. For the first time shows the influence of cooling conditions on the alumina-containing sinter quality. According to the results of computer modeling, it has been established that for creating of optimal cooling conditions of the sinter in the furnace, the length of coal burner must be not less than 5 m.

APA, Harvard, Vancouver, ISO, and other styles

48

Nazarudin Rosli, Mohd, and Norashid Aziz. "Steady state modelling of steam cracking furnace radiant section using Aspen PLUS." Materials Today: Proceedings 5, no. 10 (2018): 21780–89. http://dx.doi.org/10.1016/j.matpr.2018.07.032.

Full text

APA, Harvard, Vancouver, ISO, and other styles

49

Shvydkii, V. S., V. V. Lavrov, and E. A. Devyatykh. "Mathematical modeling of radiant heat transfer in the melting furnace working space." IOP Conference Series: Materials Science and Engineering 866 (August 13, 2020): 012041. http://dx.doi.org/10.1088/1757-899x/866/1/012041.

Full text

APA, Harvard, Vancouver, ISO, and other styles

50

Lyczkowski, R. W., C. S. Wang, L. S. H. Chow, T. R. Johnson, and G. F. Berry. "Three-dimensional analysis of a radiant furnace-application to nitric oxide decomposition." Journal of Propulsion and Power 2, no. 5 (September 1986): 457–64. http://dx.doi.org/10.2514/3.22929.

Full text

APA, Harvard, Vancouver, ISO, and other styles

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!