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Artykuły w czasopismach na temat „Industrial Process Heat (IPH)”

Autor: Grafiati

Data publikacji: 6 września 2023

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1

Chaturvedi, S. K., i L. M. Murphy. "Energy Conservation Potential of Large Capacity Solar-Assisted Heat Pumps for Low Temperature IPH Applications". Journal of Solar Energy Engineering 107, nr 4 (1.11.1985): 286–92. http://dx.doi.org/10.1115/1.3267694.

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Energy conservation and economic potential of large capacity (∼MWth) solar-assisted water-to-water heat pumps (SAHP) is evaluated for year round low temperature (<100° C) industrial process heating applications at four locations in the United States. The long-term thermal performance of the SAHP system is determined by a recently proposed utilizability method that accounts for the variable coefficient of performance of the SAHP system. The large SAHP system appears to be an attractive energy conservation alternative to fuel oil and electricity for locations with high solar resources and low electricity costs. In all but one location, the SAHP system was clearly superior to the solar only systems, such as flat plate and concentrating collectors, from the point of view of the annualized delivered energy cost. For the ranges of collector area and load temperatures considered in this study, the large SAHP system has clearly superior energy conservation potential at all four locations compared to other alternatives such as fuel oil or electricity. However, the practial suitability of SAHP cycle, as determined by the levelized cost of delivered energy, is unfavorable at all four locations when compared with fuel oil.

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2

Tao, K., K. Yamada, S. Higashi, K. Kago, H. Takeshita i K. Tokumitsu. "Relationship between Molecular Orientation Relaxation during Physical Aging and Heat Resistance of Polystyrene Injection Moldings". International Polymer Processing 36, nr 5 (1.11.2021): 577–85. http://dx.doi.org/10.1515/ipp-2020-4093.

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Abstract This work examined the relationship between changes in molecular orientation and the heat resistance (heat distortion temperature) of polystyrene injection moldings following heat treatment below the glass transition temperature. Molecular orientation around the core layer of the injection moldings was found to be relaxed by the heat treatment. Also, in the untreated specimen, the molecular orientation around the core layer was relaxed from 60°C during the heating process. Since loss tangent (tanδ) also increased from 60°C during the heating process in the untreated specimen, it was considered that the increase in tanδ occurred with the molecular motion due to the relaxation of molecular orientation from 60°C. After the heat treatment, because of the relaxation of molecular orientation around the core layer by the heat treatment, the relaxation of molecular orientation from 60 °C did not occur during the subsequent heating process, and the tanδ of the polymer between 60 and 90 °C was decreased. Because this decrease in the tanδ over this temperature range improved the heat resistance of the material, the enhanced heat resistance by the heat treatment was attributed to the suppression of the relaxation of molecular orientation from 60°C during the heating process. Furthermore, relaxation of molecular orientation and enthalpy relaxation were related to improvement in the heat resistance.

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3

Prabhakaran, R., M. Kontopoulou, G. Zak, P. J. Bates i V. Sidiropoulos. "Simulation of Heat Transfer in Laser Transmission Welding". International Polymer Processing 20, nr 4 (1.08.2005): 410–16. http://dx.doi.org/10.1515/ipp-2005-0069.

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Abstract A numerical simulation of the heat transfer during laser transmission welding is presented. A finite difference approach was used to solve the one-dimensional unsteady-state heat conduction problem and to investigate the effect of welding conditions on the time-dependent temperature profiles for PA 6. For the needs of the simulation, the process was divided into heating and heat redistribution periods. The absorption coefficient of the laser-transparent part was measured experimentally and that of the laser-absorbing part was fitted using experimental data. The predicted temperature profiles were combined with experimental meltdown data to estimate the heat-affected zone thickness in the welded specimens. Good agreement was found between the estimated and measured heat-affected zone thickness values.

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4

Yamane, H., i J. L. White. "Simulation of Tubular Film Extrusion of Polymer Melts". International Polymer Processing 2, nr 2 (1.04.1987): 107–12. http://dx.doi.org/10.1515/ipp-1987-0030.

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Abstract A model of the tubular film process is presented which includes power law non-linear rheological behaviour with temperature and crystallinity dependent properties. The heat transfer modelling uses an experimental correlation for the heat transfer coefficient. It is shown that except at low activation energies of viscous flow, the power law exponents have little influence on bubble shape. For activation energies of viscous flow of 11 kcal/mol and more, the temperature dependence of rheological properties dominates bubble shapes at fixed drawdown ratios, blowup ratios and frostline heights. Low activation energies of viscous flow produced wine glass shaped bubbles, while high activation energies cause rapid increases in bubble radius after the die exit.

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5

Buffel, B., K. Leeman i F. Desplentere. "Pulsed IR Heating of Thermoplastic Sheets for Thermoforming Applications". International Polymer Processing 36, nr 4 (1.09.2021): 388–97. http://dx.doi.org/10.1515/ipp-2020-3981.

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Abstract This study presents the pulsed heating strategy as an advancement of the current state of the art in industry towards the theoretically fastest method of heating a thermoplastic sheet. Experimental temperature measurements are combined with an explicit finite difference numerical model to describe the pulsed heating method and indicate its added value in IR heating of thermoplastic sheets. Different process settings are evaluated and indicate the effect of the applied heat flux and the time interval tOFF during pulsed heating. When switched off, the residual heating of the heater elements is able to partially compensate for the convective heat losses at the surface of the sheet. This results in a more uniform temperature distribution through thickness without slowing down the overall heating process. The study shows that this effect is lost when the time interval in which the heater element is switched off, increases. Applying pulsed heating opens up a large processing window to control the through-thickness temperature difference. When the total amount of applied thermal energy is taken into account, pulsed heating is able to increase the overall heating rate and simultaneously keep the temperature difference through thickness limited.

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6

Calabrese, L., i A. Valenza. "Modelling of Phase Transitions and Residual Thermal Stress of CTBN Rubber Modified Epoxy Resins during a Pultrusion Process". International Polymer Processing 22, nr 2 (1.04.2007): 132–39. http://dx.doi.org/10.1515/ipp-2007-0002.

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Abstract The implicit finite difference and fourth order Runge-Kutta method are used both to solve the heat transfer problem in the pultrusion reaction and to calculate the temperature and conversion distributions within a thermoset composite profile. The aim of our work is to study the influence of a rubbery phase added to the epoxy matrix in production conditions. The results have shown that the rubber modified systems have a low exothermic temperature peak value, so that neither the amount of cured resin nor the final product properties are limited. First of all we will show that the phase transition (gelation and vitrification) zones within the die change as the amount of rubber varies in the resin. The relationship between the position and of these zones and the resin systems will be discussed. We calculate the residual thermal stresses for all the investigated fibre/resin systems, showing a reduction when the rubber amount increases in the epoxy blend.

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7

Liu, S. J., i Y. T. Dung. "Ultrasonic Vibration Hot Embossing". International Polymer Processing 20, nr 4 (1.08.2005): 449–52. http://dx.doi.org/10.1515/ipp-2005-0074.

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Abstract Hot embossing has become a popular method for replicating precise micro-features onto large plastic plates. However, a long cycle time of the process due to conventional electric heating or hot oil heating is one of problems that confound the overall success of this technology. This study proposed a novel hot embossing method by using ultrasonic vibration as a heat generator. Experiments were carried out on a 2000-watt ultrasonic welding machine. A 2 mm thick polymethyl methyl acrylic (PMMA) plate was used for embossing microstructures onto its surface. The results in this study suggest that ultrasonic vibration hot embossing can provide an effective way of molding microstructures onto the surface of polymeric plates. Nevertheless, this novel process will need some improvements in the design of the ultrasonic vibration machine in order to make the process feasible.

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8

Henrichsen, L. K., i A. J. McHugh. "Analysis of Film Blowing with Flow-enhanced Crystallization". International Polymer Processing 22, nr 2 (1.04.2007): 190–97. http://dx.doi.org/10.1515/ipp-2007-0010.

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Abstract An analysis of the transient film blowing process is presented based on the two-phase Giesekus/rigid rod model for flow-enhanced crystallization described in Part 1 [1]. Linearized frequency analysis has been used to explore the effects of system disturbances on the process. Results show that perturbations related to heat transfer and inflation pressure are more significant than the effects of film thickness (die swell). In addition, crystallinity is shown to have a consistent stabilizing effect on the system, with more crystallinity dampening the perturbations. Stability diagrams for each material show relatively wide regions of convergence in the blow-up ratio (BUR) – draw ratio space, however, at higher BURs (≥ ~ 4) the system becomes unstable for all DRs.

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9

Kanai, Toshitaka. "Theoretical Analysis of Tubular Film Extrusion and its Applications for HMW-HDPE". International Polymer Processing 2, nr 3 (1.07.1987): 137–43. http://dx.doi.org/10.1515/ipp-1987-0005.

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Abstract Theoretical analysis of the tubular film extrusion using computer simulation presented has been used to preduct bubble shapes, velocity profiles and stretching stresses. From the theoretical analysis, maximum stretching stresses, which are closely related to film physical properties, were predicted under various process conditions. This theoretical analysis was applied to high molecular weight HDPE tubular film process. It was found that high strength HDPE film can be produced by maintaining high stretching stress, which is obtained on the conditions of high out-put rate, high take-up speed and low temperature by reducing the heat generated by viscous dissipation. Further, the processability of HDPE film produced using bubble stabilizing equipment was discussed.

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10

Li, S., N. Gao i D. Ewing. "Experimental Investigation of the Effect of the Bubble Cone on the Cooling Jets used in the Blown Film Manufacturing Process". International Polymer Processing 20, nr 4 (1.08.2005): 432–40. http://dx.doi.org/10.1515/ipp-2005-0072.

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Abstract An experimental investigation was performed to characterize the flow field produced by a dual-lip air ring used in the blown-film manufacturing process for a solid model with a blow-up ratio of 3.5 similar to the shape of a typical LLDPE bubble. Distributions of the static and fluctuating pressure on the model and the flow field above the forming cone were measured for a range of settings on the dual-lip air ring. It was found that the distribution of the pressure on the bubble below the forming cone had many features similar to the measurements for a bubble with a blow-up ratio of 2.5 [1]. In the region above the forming cone, the upper jet appeared to merge with the lower jet rather than entraining the lower jet as was observed for a bubble with a blow-up ratio of 2.5 [1]. This resulted in a smaller local maximum in the normalized fluctuating pressure in the region above the forming cone and would likely result in less heat transfer in this region. It was also found that the initial angle of the upper jet exiting the air ring changed when the height of the bubble cone was adjusted for the bubble with the blow-up ratio of 3.5. This affected the static pressure in the region below the location where the upper jet attaches to the bubble and the pressure fluctuations in the region where the upper jet attaches to the surface. Finally, unlike the bubble with the blow-up-ratio of 2.5 [1], the presence of the bubble cone caused a region of negative gauge pressure in the region above the forming cone that should act to stabilize the bubble against the bubble cone. The pressure in this region and the region below the forming cone both decreased when the porosity of the bubble cone was reduced.

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11

Zitzenbacher, G., i G. R. Langecker. "A New Plasticating Model for Amorphous and Semi-crystalline Polymers in Single Screw Extruders". International Polymer Processing 20, nr 4 (1.08.2005): 360–68. http://dx.doi.org/10.1515/ipp-2005-0064.

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Abstract Polymeric thermoplastic materials can be subdivided in amorphous and semi-crystalline ones. In contrast to semi-crystalline polymers amorphous thermoplastic materials have no defined phase transition and hence no melt enthalpy. The glass transition region describes the change of the material behaviour from the state of a rubber like to an under-cooled fluid (glassy state). Setting the melt enthalpy in the Stefan-Neumann problem zero gives no valid results for the solid bed profile. Thus this condition is unsuitable for describing the plasticating process of amorphous polymers. In this paper a new model for the plastication of amorphous and semi-crystalline polymers in single screw extruders is presented. Therefore a new calculation method for the determination of the moving velocity between the glassy solid bed and the softened film region on the barrel surface is developed. The whole enthalpy to heat up the polymer on a critical flow temperature in the screw channel is considered.

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12

Ausias, G., G. Dolo, D. Cartié, F. Challois, P. Joyot i J. Férec. "Modeling and Numerical Simulation of Laminated Thermoplastic Composites Manufactured by Laser-Assisted Automatic Tape Placement". International Polymer Processing 35, nr 5 (1.11.2020): 471–80. http://dx.doi.org/10.1515/ipp-2020-350509.

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Abstract A comprehensive numerical model is developed for the simulation of the laser-assisted automated tape placement process of carbon fiber/thermoplastic composites. After being heated with a laser, the thermoplastic is welded with the help of a consolidation roller onto a substrate made up of layers of tapes bonded onto one another. Under the pressure applied by the roller, the thermoplastic flows and the tape reaches its final thickness. The numerical model is developed in three sequential steps that can be used to identify the required pressure and temperature distribution to achieve a good bond. Firstly, a heat transfer simulation is performed to determine the temperature distribution into the incoming tape under the consolidation roller. Secondly, a rheological model is developed to examine the polymer flow under the roller and to obtain the pressure field. Finally, the consolidation level between the substrate and the tape is investigated through the degree of intimate contact, which is related to the processing parameters such as the roller velocity, the laser power density and the compaction force.

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13

Figurski, Jan, i Jerzy Niepsuj. "Reliability of functioning of logistic processes". Systemy Logistyczne Wojsk 54, nr 1 (21.07.2021): 125–34. http://dx.doi.org/10.37055/slw/140410.

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W artykule przedstawiono zasadnicze uwarunkowania dotyczące charakterystyk funkcjono-wania procesów logistycznych w nowoczesnym przedsiębiorstwie. Scharakteryzowano funkcjo-nalność poszczególnych ogniw logistycznych i ich zasadnicze parametry. Funkcjonalność tych ogniw została wkomponowana w struktury niezawodnościowe, które najczęściej występują w procesach funkcjonalnych przedsiębiorstwa. Wszystkie rezultaty planowania zostały wykorzy-stane do opisu czynności prognostycznych i wyznaczenia parametrów funkcjonalnych poszcze-gólnych ogniw logistycznych. W artykule uwzględniono również procesy efektywności funkcjo-nalnej przedsiębiorstwa oceniane za pomocą wariantów systemowych i wskaźników doraźnych. W końcowej części zwrócono uwagę na potrzebę korzystania z informacji podstawowych z in-formatycznego systemu zarządzania procesami eksploatacji. Celem artykułu jest przedstawienie oceny niezawodności środków transporty za pomocą funkcji, wskaźników niezawodności. Cele szczegółowe obejmują odwzorowanie struktur niezawodności środków transportu oraz podsta-wowych wskaźników dotyczących funkcji niezawodności i gotowości analizowanych urządzeń. Problem badawczy obejmuje opracowanie systemu umożliwiającego analizę i ocenę procesów niezawodności analizowanych urządzeń. W artykule postawiono doi weryfikacji następująca hipotezę: Istnieje możliwość i potrzeba opracowania systemu umożliwiającego analizę istnieją-cego stanu i ocenę funkcjo niezawodności oraz wskaźników gotowości analizowanych urzą-dzeń. W badaniu wykorzystano metodę analizy systemowej ujmującej zagadnienia „jak jest oraz jak być powinno”, ponadto w ocenie stosowano funkcje niezawodności oraz funkcje inten-sywności uszkodzeń. Wykorzystano również funkcję prognozy niezawodności.W artykule wyko-rzystano własny dorobek literaturowy oraz pozycje autorstwa Barlow R., Proschan F., Mathe-matical theory of reliability, Socjety for Industrial and Applied Mathematics, Philadelphia 1996, Girtler J.: Reliability model of two-shaft turbine combustion engine with heat regenera-tor. Journal of KONES Powertrain and Transport, Vol. 132, No. 4,2006 pp. 15-22 oraz Zurek J., Ziolkowski J., Borucka A., Research of automotive vehicles operation process using the Markov model, Safety and Reliability. Theory and Applications, ESREL 2017.

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14

Schmitt, Rainer, Oswin Öttinger, Wolf Dieter Steinmann i Maike Johnson. "PCM-Graphite Latent Heat Storage Systems for Industrial Process Heat Recovery". Advances in Science and Technology 74 (październik 2010): 259–65. http://dx.doi.org/10.4028/www.scientific.net/ast.74.259.

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Increasing energy prices and shortage of fossil fuels lead to a growing interest in alternative energy sources. In combination with energy storage systems the generation of solar process heat can be provided independent from the weather leading for example to a cost efficient stabilization of power output. For this application latent heat storage units with phase change materials (PCMs) can be designed to store solar process heat within a narrow temperature interval utilizing the high storage density of the different PCMs. This is achieved using the latent heat of melting in the melting / solidification process, or the latent heat of re-crystallization in a solid / solid phase transition. However, this advantage can only be used in technical applications if the heat transfer in the PCM is sufficiently high. As most pure PCMs exhibit a low thermal conductivity (about 1 W/(m•K) or less), methods to improve heat transfer in PCMs have been under investigation for decades. The heat transfer in a PCM can be increased by addition of highly thermal conductive materials. Due to its superior properties - high thermal conductivity, good processability, and chemical inertness - graphite has distinct advantages for this purpose. Depending on the requirements of the respective application, various routes to combine PCM and graphite are used. For example, besides the fabrication of PCM/graphite composite materials, the increase of heat exchanger surface by highly thermal conductive graphite plates is a favorable method for large scale applications, in particular. Effective thermal conductivities up to 30 W/(m•K) have been realized. This paper gives an overview of actual and potential applications of PCM/graphite heat storage systems focusing on storage of solar heat for high temperature applications such as process heat generation and solar thermal power plants.

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15

GHONEIM, ADEL A. "SOLAR INDUSTRIAL PROCESS HEAT POTENTIAL IN ALEXANDRIA, EGYPT". International Journal of Solar Energy 11, nr 3-4 (styczeń 1992): 177–84. http://dx.doi.org/10.1080/01425919208909737.

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16

Kutscher, C. F., i Jan F. Kreider. "Design Approaches for Solar Industrial Process Heat Systems". Journal of Solar Energy Engineering 107, nr 4 (1.11.1985): 363–64. http://dx.doi.org/10.1115/1.3267709.

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17

Kalogirou, Soteris. "The potential of solar industrial process heat applications". Applied Energy 76, nr 4 (grudzień 2003): 337–61. http://dx.doi.org/10.1016/s0306-2619(02)00176-9.

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18

Ibrahim, O. M., A. A. Ghoneim, O. A. Halabi i A. Kamil. "Solar industrial process heat potential in Khartoum, Sudan". Solar & Wind Technology 7, nr 6 (styczeń 1990): 649–54. http://dx.doi.org/10.1016/0741-983x(90)90039-5.

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19

Butterworth, David. "Process heat transfer 2010". Applied Thermal Engineering 24, nr 8-9 (czerwiec 2004): 1395–407. http://dx.doi.org/10.1016/j.applthermaleng.2003.11.023.

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20

Kalogirou, Soteris A. "Parabolic trough collectors for industrial process heat in Cyprus". Energy 27, nr 9 (wrzesień 2002): 813–30. http://dx.doi.org/10.1016/s0360-5442(02)00018-x.

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21

Farjana, Shahjadi Hisan, Nazmul Huda, M. A. Parvez Mahmud i R. Saidur. "Solar process heat in industrial systems – A global review". Renewable and Sustainable Energy Reviews 82 (luty 2018): 2270–86. http://dx.doi.org/10.1016/j.rser.2017.08.065.

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22

Özdoǧan, Sibel, i Mahir Arikol. "Solar, industrial process-heat applications in selected Turkish industries". Energy 17, nr 6 (czerwiec 1992): 535–46. http://dx.doi.org/10.1016/0360-5442(92)90090-m.

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23

Fernández-García, Aránzazu, Esther Rojas, Manuel Pérez, Ricardo Silva, Quetzalcoatl Hernández-Escobedo i Francisco Manzano-Agugliaro. "A parabolic-trough collector for cleaner industrial process heat". Journal of Cleaner Production 89 (luty 2015): 272–85. http://dx.doi.org/10.1016/j.jclepro.2014.11.018.

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24

Jende, Enrico, Nancy Kabat, Panagiotis Stathopoulos i Eberhard Nicke. "Thermodynamic analysis of an industrial process integration of a reversed Brayton high-temperature heat pump: A case study of an industrial food process". E3S Web of Conferences 414 (2023): 03006. http://dx.doi.org/10.1051/e3sconf/202341403006.

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Industry, as a major emitter of CO2 in the process heat sector in Europe, needs to switch from fossil fuels to renewable energy for heat supply. High temperature heat pumps (HTHP) can electrify process heat and integrate renewable electricity into industrial processes. The Institute of Low-Carbon Industrial Processes of the German Aerospace Center (DLR) is developing HTHPs based on the reversed Brayton and Rankine cycles for delivery temperatures above 150°C and is investigating the industrial process integration of this novel technology. The current study considers different integration strategies of a reversed Brayton HTHP in a food production process with a heat sink at 250 °C. A thermodynamic analysis evaluates the results. This study allows conclusions to be drawn about the process integration of Brayton HTHPs in industrial food processes or other industrial processes with heat sinks around 250 °C.

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25

Brinksmeier, E., i T. Brockhoff. "Utilization of Grinding Heat as a New Heat Treatment Process". CIRP Annals 45, nr 1 (1996): 283–86. http://dx.doi.org/10.1016/s0007-8506(07)63064-9.

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Tasmin, Nahin, Shahjadi Hisan Farjana, Md Rashed Hossain, Santu Golder i M. A. Parvez Mahmud. "Integration of Solar Process Heat in Industries: A Review". Clean Technologies 4, nr 1 (17.02.2022): 97–131. http://dx.doi.org/10.3390/cleantechnol4010008.

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Industrial manufacturing approaches are associated with processing materials that consume a significant amount of thermal energy, termed as industrial process heat. Industrial sectors consume a substantial amount of energy for process heating over a wide range of temperatures (up to 400 °C) from agriculture, HVAC to power plants. However, the intensive industrial application of fossil fuels causes unfavorable environmental effects that cannot be ignored. To address this issue, green energy sources have manifested their potential as economical and pollution-free energy sources. Nevertheless, the adoption of solar industrial process heating systems is still limited due to a lack of knowledge in the design/installation aspects, reluctance to experience the technical/infrastructural changes, low price of fossil fuels, and lack of relative incentives. For successful solar process heat integration in industries, a proper understanding of the associated design factors is essential. This paper comprehensively reviews the integration strategies of solar industrial process heating systems, appraisal of the integration points, different aspects of solar collectors, installed thermal power, and thermal storage volume covering case studies, reports and reviews. The integration aspects of solar process heat, findings, and obstacles of several projects from the literature are also highlighted. Finally, the integration locations of SHIP systems are compared for different industrial sectors to find out the most used integration point for a certain sector and operation. It was found that for the food, beverage, and agriculture sector, 51% of solar process heat integration occurs at the supply level and 27.3% at the process-level.

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Kang, Ju O., i Sung Chul Kim. "Heat Transfer Characteristics of Heat Exchangers for Waste Heat Recovery from a Billet Casting Process". Energies 12, nr 14 (15.07.2019): 2695. http://dx.doi.org/10.3390/en12142695.

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The application of the thermoelectric generator (TEG) system to various industrial facilities has been explored to reduce greenhouse gas emissions and improve the efficiency of such industrial facilities. In this study, numerical analysis was conducted according to the types and geometry of heat exchangers and manufacture process conditions to recover waste heat from a billet casting process using the TEG system. The total heat absorption increased by up to 10.0% depending on the geometry of the heat exchanger. Under natural convection conditions, the total heat absorption increased by up to 45.5%. As the minimum temperature increased, the effective area increased by five times. When a copper heat exchanger of direct conduction type was used, the difference between the maximum and minimum temperatures was significantly reduced compared to when a stainless steel heat exchanger was used. This confirmed that the copper heat exchanger is more favorable for securing a uniform heat exchanger temperature. A prototype TEG system, including a thermosyphon heat exchanger, was installed and a maximum power of 8.0 W and power density of 740 W/m2 was achieved at a hot side temperature of 130 °C. The results suggest the possibility of recovering waste heat from billet casting processes.

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McMillan, Colin, William Xi, Jingyi Zhang, Eric Masanet, Parthiv Kurup, Carrie Schoeneberger, Steven Meyers i Robert Margolis. "Evaluating the economic parity of solar for industrial process heat". Solar Energy Advances 1 (2021): 100011. http://dx.doi.org/10.1016/j.seja.2021.100011.

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Vanatta, Max, Deep Patel, Todd Allen, Daniel Cooper i Michael T. Craig. "Technoeconomic analysis of small modular reactors decarbonizing industrial process heat". Joule 7, nr 4 (kwiecień 2023): 713–37. http://dx.doi.org/10.1016/j.joule.2023.03.009.

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Peakman, Aiden, i Robert Gregg. "The Fuel Cycle Implications of Nuclear Process Heat". Energies 13, nr 22 (20.11.2020): 6073. http://dx.doi.org/10.3390/en13226073.

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International and UK fuel cycle scenario analyses performed to date have focused on nuclear plants producing electricity without considering in detail the other potential drivers for nuclear power, such as industrial process heat. Part of the reason behind the restricted applications of nuclear power is because the assumptions behind the future scenario are not fully captured, for example how big are demands from different sectors? Here we present a means to fully capture the potential opportunities for nuclear power using Sankey diagrams and then, using this information, consider for the first time in the UK the fuel cycle implications of decarbonising industrial heat demand in the year 2050 with nuclear power using the ORION fuel cycle code to study attributes related to spent fuel, uranium demand and decay heat from the spent fuel. We show that even in high industrial energy demand scenarios, the sensitivity of spent fuel masses and decay heat to the types of reactor deployed is relatively small compared to the greater fuel cycle demands from large-scale deployment of nuclear plants for electricity production. However, the sensitivity of spent fuel volumes depends heavily on the extent to which High Temperature Reactor and Light Water Reactor systems operating on a once-through cycle are deployed.

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Ahmetović, Elvis, i Zdravko Kravanja. "Simultaneous optimization of heat-integrated water networks involving process-to-process streams for heat integration". Applied Thermal Engineering 62, nr 1 (styczeń 2014): 302–17. http://dx.doi.org/10.1016/j.applthermaleng.2013.06.010.

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Nájera-Trejo, Mario, Fernando Álvarez-Chavarría, Norma A. Rodríguez-Muñoz, Claudia K. Romero-Pérez, Ignacio R. Martín-Domínguez i Naghelli Ortega-Avila. "Pre-Feasibility Assessment Tool for Solar Industrial Process Heating". Processes 11, nr 6 (30.05.2023): 1663. http://dx.doi.org/10.3390/pr11061663.

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The industrial sector demands 25% of global energy as heat, where one-third is used at temperatures below 150 °C. Nevertheless, the installed solar heating capacity in the industry is only 0.02%, even though the integration of solar heating systems into production processes could significantly reduce fossil fuel consumption at a competitive cost. Among other reasons, this low penetration is due to the final users’ lack of knowledge of solar heating technologies. As a result, a free pre-feasibility assessment tool was developed for non-specialised users to evaluate the possibility of integrating solar heat into their processes using basic information. This tool uses transient simulation to estimate a feasible solar heating system through the parametric optimisation of the solar collection area, thermal storage volume, heat exchange capacity, and solar integration schemes at the supply level and costs. A commercial facility in Mexico was analysed using the developed tool as a case study. However, even when this is not a design tool, the calculated solar collector area, storage tank volume, and investment were only 2.1%, 9.0%, and 2.3% higher than reported by the solar designer. Pre-feasibility assessment tools are essential to overcome the certainty gap between end users and solar designers, thus enhancing the possibility of implementing solar heating systems in various commercial and industrial processes.

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George, Joel, Gopal Chandra Sahu i Santanu Bandyopadhyay. "Heat Integration in Process Water Networks". Industrial & Engineering Chemistry Research 50, nr 7 (6.04.2011): 3695–704. http://dx.doi.org/10.1021/ie101098a.

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Jin, Lu, Xiaodong Zhang, Chengtian Cui, Zhijun Xi i Jinsheng Sun. "Simultaneous process parameters and heat integration optimization for industrial organosilicon production". Separation and Purification Technology 265 (czerwiec 2021): 118520. http://dx.doi.org/10.1016/j.seppur.2021.118520.

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Hennecke, K., W. Meinecke i D. Krüger. "Integration of solar energy into industrial process heat and cogeneration systems". Le Journal de Physique IV 09, PR3 (marzec 1999): Pr3–705—Pr3–710. http://dx.doi.org/10.1051/jp4:19993112.

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Slama, Salma, Mahmoud Bouhafs, Jamel Bessrour, Moez Ben Jaber i Hassan Mokdadi. "Numerical simulation of heat transfer during leaf spring industrial quenching process". Mechanics & Industry 19, nr 3 (2018): 304. http://dx.doi.org/10.1051/meca/2018013.

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This study is carried out in partnership with the company CAVEO, manufacturer of leaf springs for vehicles. It concerns the development of a numerical model intended to follow the space-time temperature evolution of a leaf during two processing operations: hot cambering and quenching. This leaf is of a parabolic profile, made of EN-51CrV4 steel (AISI-6150). After austenitization, it passes through a cambering operation to confer it the desired deflection and then a quenching operation. This quenching is carried out in an oil bath to achieve better mechanical properties. The prediction of the temperature during quenching involves determining the heat transfer coefficient between the leaf and the oil bath. This coefficient is determined by quenching, under the same conditions as the leaf, using a standard probe of the same steel. The numerical model is based on the resolution of the transient heat equation by considering the heat loss flows towards the heterogeneous environment (ambient air, press contact and quenching oil). The results obtained by this model give the space-time temperature evolution of the leaf from the exit of the heating furnace to the exit of the oil bath. The numerical results are compared to the experimental profiles obtained through thermographic images throughout cambering and quenching operations. These results are consistent with experimental results.

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Tlepov, Emil Viktorovich, Nickolay Gennadievich Romanenko i Sergey Vladimirovich Golovko. "MODERNIZATION OF INDUSTRIAL HORIZONTAL AUTOCLAVE". Vestnik of Astrakhan State Technical University 2021, nr 1 (31.05.2021): 29–35. http://dx.doi.org/10.24143/1812-9498-2021-1-29-35.

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The article considers the problems of raising the efficiency of energy resources spent on the operation of a horizontal industrial autoclave, improving the quality of sterilized products and reducing the number of spoiled products. The analysis of the problems in automation control systems has been carried out and the shortcomings of the automatic control systems of technological process of canned food sterilization have been revealed. There has been described in detail the hierarchical structure of the autoclave control system. The main blockages caused by the pressure drop in air-main, water-main and steam-main are indicated. A detailed description of the cooling tower structure is given, the principle of cooling the circulating water and its supply to the consumer is analyzed. Within the framework of solving the problem of increasing the efficiency of energy resources and based on the technical characteristics, throughput and heat transfer coefficient, it is proposed to use a plate heat exchanger. There is described its operation principle, which includes heating the incoming water to a predetermined temperature and cooling it at the end of the sterilization cycle. The combined use of a cooling tower and a heat exchanger will help to greatly reduce the energy costs, because the water used in the sterilization process will not drain into the general sewer at the end of the process, but will be cooled in a cooling tower and supplied to cool the autoclaves. When heated, the live steam won’t go directly into the autoclave, but will be fed into a heat exchanger to heat the circulating water, which will significantly reduce the overheating of the sterilized product

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Klinac, Elsa, James Kenneth Carson, Duy Hoang, Qun Chen, Donald John Cleland i Timothy Gordon Walmsley. "Multi-Level Process Integration of Heat Pumps in Meat Processing". Energies 16, nr 8 (13.04.2023): 3424. http://dx.doi.org/10.3390/en16083424.

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Many countries across the globe are facing the challenge of replacing coal and natural gas-derived process heat with low-emission alternatives. In countries such as New Zealand, which have access to renewably generated electricity, industrial heat pumps offer great potential to reduce sitewide industrial carbon emissions. In this paper, a new Pinch-based Total Site Heat Integration (TSHI) method is proposed and used to explore and identify multi-level heat pump integration options at a meat processing site in New Zealand. This novel method improves upon standard methods that are currently used in industry and successfully identifies heat pump opportunities that might otherwise be missed by said standard methods. The results of the novel method application suggest that a Mechanical Vapour Recompression (MVR) system in the Rendering plant and a centralized air-source heat pump around the hot water ring main could reduce site emissions by over 50%. Future research will develop these preliminary results into a dynamic emissions reduction plan for the site, the novel methods for which will be transferrable to similar industrial sites.

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Meyers, Steven, Bastian Schmitt i Klaus Vajen. "The future of low carbon industrial process heat: A comparison between solar thermal and heat pumps". Solar Energy 173 (październik 2018): 893–904. http://dx.doi.org/10.1016/j.solener.2018.08.011.

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Svensson, Elin, Matteo Morandin i Simon Harvey. "Characterization and visualization of industrial excess heat for different levels of on‐site process heat recovery". International Journal of Energy Research 43, nr 14 (30.08.2019): 7988–8003. http://dx.doi.org/10.1002/er.4787.

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Oakes, James P. "Industrial Internet of Things Enters Heat Treat World". AM&P Technical Articles 175, nr 8 (1.11.2017): 52–54. http://dx.doi.org/10.31399/asm.amp.2017-08.p052.

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Abstract The Industrial Internet of Things (IIoT) has tremendous potential in many areas of industry, and the opportunities in heat treating cannot be overlooked. Large amounts of process and operational data can be gathered in heat treating. The potential for predictive processes, maintenance, and productivity will be fully realized as the heat treat industry combines data from multiple sources and focuses on evaluating, and acting on, both real-time and historical data that is readily available.

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Uppal, Anubhav, i J. P. Kesari. "Solar Industrial Process Heating system for Indian Automobile Industry". International Journal of Advance Research and Innovation 4, nr 1 (2016): 320–25. http://dx.doi.org/10.51976/ijari.411647.

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Indian automobile industry is one of the largest in the world. To match production with demand, many automobile makers have started to invest heavily in various parts in the industry. Automobile industries have number of different production that needs large amounts of energy in form of electricity or heat. In automobile industry over 65% of the energy demand is for heating. Possible integration with proper solar thermal technology depending on the temperature range achieved by different solar collectors and temperature needed for process provided by heat application media. It also shows the current energy source or fuel being used to achieve these processes. Proposed system combines the direct steam generation concentrating collectors with the fossil fuel fired high pressure boiler. Solar thermal technology can be installed in the most automobile industrial sectors to lower consumption of fossil fuels, cut production costs, preserve environment by lessening CO2 emissions. Concentrating solar collector field is mounted on the roof of an industrial production site to Solaris the supply of saturated steam into steam network.

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Li, Dong Mei, Xin Chun Wang, Li Nan Shi i Bo Chao Qu. "Research and Numerical Simulation of Heat Transfer Problems in the Industrial Production". Advanced Materials Research 756-759 (wrzesień 2013): 1679–83. http://dx.doi.org/10.4028/www.scientific.net/amr.756-759.1679.

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This article focuses on heat conduction problems in the process of steel industry. Modeling the direct problems of heat transfer, establish heat conduction and thermal radiation model. Model discretization method are used, discussion process from one dimension to two. We give the difference schemes, and the numerical example. Through the results we compare differences between one and two dimensional models, and the impact to the results of the two heat transfer mode.

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Rosales-Pérez, Josué F., Andrés Villarruel-Jaramillo, José A. Romero-Ramos, Manuel Pérez-García, José M. Cardemil i Rodrigo Escobar. "Hybrid System of Photovoltaic and Solar Thermal Technologies for Industrial Process Heat". Energies 16, nr 5 (24.02.2023): 2220. http://dx.doi.org/10.3390/en16052220.

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Process heating is the activity with the most energy consumption in the industrial sector. Solar heating (SH) systems are a promising alternative to provide renewable thermal energy to industrial processes. However, factors such as high investment costs and area limitations in industrial facilities hinder their utilization; therefore, hybrid systems that combine two different solar thermal or photovoltaic technologies where each technology operates under conditions that allow a higher overall performance than conventional configurations have been proposed. In this review, we discuss the limitations of conventional SH systems and the potential of hybrid configurations to overcome them. First, the current literature about conventional and hybrid systems is presented. Then, the application of common performance indicators to evaluate hybrid configurations is analyzed. Finally, the limitation, advantages, and potential applications of conventional and hybrid systems are discussed. This work shows that conventional systems are the most promising alternatives in low and high-temperature industrial applications. At the same time, in medium and processes, hybrid configurations have great potential to increase the performance of SH systems and help to boost their adoption in the industrial sector. There are few studies about hybrid systems in industrial applications, and further research is required to determine their potential.

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Grande, Mike. "Understanding Thermal Overdrive in Industrial Ovens". AM&P Technical Articles 175, nr 6 (1.09.2017): 82–83. http://dx.doi.org/10.31399/asm.amp.2017-06.p082.

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Alif Gita Arumsari i Petrus Junake Ginting. "Analysis of Heat Transfer Coefficient of Shell and Tube on Heat Exchanger Using Heat Transfer Research Inch (HTRI) Software". Formosa Journal of Sustainable Research 2, nr 5 (30.05.2023): 1175–84. http://dx.doi.org/10.55927/fjsr.v2i5.4271.

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The heat transfer process in the industrial world is the most important thing to pay attention to, especially in industrial equipment that works at high temperatures, one of the heat exchangers commonly used in the industrial world is a heat exchanger which is used to exchange heat between fluids of different temperatures. Therefore, it is necessary to pay attention to the performance of the heat exchanger. In the shell and tube type heat exchanger, apart from using baffles which aim to direct the flow on the shell side, it also aims to increase the rate of heat transfer that occurs between the working fluids by causing flow turbulence on the shell side. The results of this study are to obtain the heat transfer that occurs in the shell and tube in the heat exchanger, and to obtain the total heat transfer coefficient

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Boumerzoug, Zakaria, Nedjma Chérifi i Thierry Baudin. "Texture in Welded Industrial Aluminum". Applied Mechanics and Materials 563 (maj 2014): 7–12. http://dx.doi.org/10.4028/www.scientific.net/amm.563.7.

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In this investigation, grain orientation has been studied in an industrial aluminium Al99.5 which has been welded by TIG process. The optical microscopy and EBSD (Electron Back Scattered Diffraction) were the main techniques used to illustrate the effect of welding on grain orientation in fusion zone and in heat affected zone. Epitaxial growth has been observed in weld joint and texture of each zone has been determined. On the other hand, the effect of isothermal heat treatment at 400 °C on homogenization of welded joint has been also studied. It was shown that the cube orientation {001}<100> is the dominant texture component in welded joint before or after heat treatments.

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Adonyi, R., J. Romero, L. Puigjaner i F. Friedler. "Incorporating heat integration in batch process scheduling". Applied Thermal Engineering 23, nr 14 (październik 2003): 1743–62. http://dx.doi.org/10.1016/s1359-4311(03)00141-8.

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Krajnc, Majda, Anita Kovač-Kralj i Peter Glavič. "Heat integration in a speciality product process". Applied Thermal Engineering 26, nr 8-9 (czerwiec 2006): 881–91. http://dx.doi.org/10.1016/j.applthermaleng.2005.09.018.

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Bai, Yike, Yi Yao i Shouqing Zheng. "Design and Analysis of Heat Pipe Heat Exchanger Efficiency". Bulletin of Science and Practice, nr 6 (15.06.2023): 373–80. http://dx.doi.org/10.33619/2414-2948/91/44.

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The heat pipe has a high thermal conductivity, and its basic working principle is to transfer heat through evaporation and condensation through the working medium inside the pipe. Heat pipe has good thermal conductivity, isotherm and other characteristics, and the heat transfer area at both ends can be changed at will, control the temperature and other advantages. Therefore, the heat pipe heat exchanger has the advantages of high heat transfer efficiency, compact structure, small fluid resistance loss, and beneficial to control dew point corrosion. At present, it has been widely used in metallurgy, chemical industry, oil refining, boiler, ceramics, transportation, light textile, machinery and other industries, as energy saving equipment for waste heat recovery and heat energy utilization in the process, and has achieved remarkable economic benefits. The design of the heat pipe heat exchanger on the development of the current situation, development trend, application, design principle and design process of a simple description, while focusing on the discussion of the heat pipe heat exchanger design process. The main content of the heat exchanger thermodynamic calculation, structural design and material selection. The model of heat pipe heat exchanger is established according to the actual situation and the calculated data.

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