Добірка наукової літератури з теми "Thermo-upgrading"
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Статті в журналах з теми "Thermo-upgrading"
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Schmitt, Nina, Andreas Apfelbacher, Nils Jäger, Robert Daschner, Fabian Stenzel, and Andreas Hornung. "Thermo‐chemical conversion of biomass and upgrading to biofuel: The Thermo‐Catalytic Reforming process – A review." Biofuels, Bioproducts and Biorefining 13, no. 3 (February 25, 2019): 822–37. http://dx.doi.org/10.1002/bbb.1980.
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Muley, P. D., C. E. Henkel, G. Aguilar, K. T. Klasson, and D. Boldor. "Ex situ thermo-catalytic upgrading of biomass pyrolysis vapors using a traveling wave microwave reactor." Applied Energy 183 (December 2016): 995–1004. http://dx.doi.org/10.1016/j.apenergy.2016.09.047.
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Duan, Peigao, Bing Wang, and Yuping Xu. "Catalytic hydrothermal upgrading of crude bio-oils produced from different thermo-chemical conversion routes of microalgae." Bioresource Technology 186 (June 2015): 58–66. http://dx.doi.org/10.1016/j.biortech.2015.03.050.
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Choi, Dongho, Sungyup Jung, Dong-Jun Lee, Hana Kim, Yiu Fai Tsang, and Eilhann E. Kwon. "A new upgrading platform for livestock lignocellulosic waste into syngas using CO2-assisted thermo-chemical process." Energy Conversion and Management 236 (May 2021): 114084. http://dx.doi.org/10.1016/j.enconman.2021.114084.
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Xiao, Qiao, Changlin Cao, Liren Xiao, Longshan Bai, Huibin Cheng, Dandan Lei, Xiaoli Sun, et al. "Selective Decomposition of Waste Rubber from the Shoe Industry by the Combination of Thermal Process and Mechanical Grinding." Polymers 14, no. 5 (March 7, 2022): 1057. http://dx.doi.org/10.3390/polym14051057.
Повний текст джерелаАнотація:
A major challenge in waste rubber (WR) industry is achieving a high sol fraction and high molecular weight of recycled rubber at the same time. Herein, the WR from the shoe industry was thermo-mechanically ground via the torque rheometer. The effect of grinding temperature and filling rate were systematically investigated. The particle size distribution, structure evolution, and morphology of the recycled rubber were explored by laser particle size analyzer, Fourier transform infrared spectroscopy (FTIR), sol fraction analysis, gel permeation chromatography (GPC), differential scanning calorimeter (DSC), and scanning electron microscope (SEM). The results indicate that the thermo-mechanical method could reduce the particle size of WR. Moreover, the particle size distribution of WR after being ground can be described by Rosin’s equation. The oxidation reaction occurs during thermal-mechanical grinding. With the increase of the grinding temperature and filling rate, the sol fraction of the recycled WR increases. It is also found that a high sol fraction (43.7%) and high molecular weight (35,284 g/mol) of reclaimed rubber could be achieved at 80 °C with a filling rate of 85%. Moreover, the obtained recycled rubber compound with SBR show a similar vulcanization characteristics to pure SBR. Our selective decomposition of waste rubber strategy opens up a new way for upgrading WR in shoe industry.
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Hunt, John A., Frank E. Dickerson, A. Abbott, Gabriel Szantai, and Paul E. Mooney. "UHV ENFINA - A New High-Performance EELS Spectrometer for the VG STEM." Microscopy and Microanalysis 7, S2 (August 2001): 1132–33. http://dx.doi.org/10.1017/s1431927600031731.
Повний текст джерелаАнотація:
The Gatan Enfina EELS spectrometer, featuring a new generation of detection system, was recently developed to upgrade or replace Gatan PEELS / DigiPEELS systems. Major advantages of the system include significant improvements to the detector point spread function, readout speed, sensitivity, readout noise, and increased number of detection channels. This design was until now not available for VG STEM systems because compatible detectors must not significantly degrade the UHV column vacuum and must survive column baking. in this abstract we report on a new detector system with comparable specifications to the standard Enfina system but designed for new or for upgrading existing Gatan UHV PEELS / DigiPEELS systems on the VG STEM.The standard Enfina design has the scintillator, fibers, CCD, CCD socket board, flex-cables, thermo electric cooler and coupling grease in the shared vacuum of the EELS spectrometer and the electron microscope.
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Kurpe, Oleksandr H., Volodymyr V. Kukhar, Eduard S. Klimov, and Andriy H. Prysiazhnyi. "Thermomechanical Controlled Rolling of Hot Coils of Steel Grade S355MC at the Wide-Strip Rolling Mill 1700." Solid State Phenomena 291 (May 2019): 63–71. http://dx.doi.org/10.4028/www.scientific.net/ssp.291.63.
Повний текст джерелаАнотація:
Тhere has been developed technology, and pilot batch of hot rolling coils (6×1500 mm, steel grade S355MC) has been produced using thermo-mechanical controlled process (TMCP) for the wide-strip rolling mill 1700. The integrated technology for TMCP coil production (steel grade S355MC) has been firstly developed for the rolling mill 1700 in accordance with EN 10149-2. Air cooling for coils to 450°C after coiling has been firstly used in the developed technology, which provides for decrease in air scale and improvement of surface quality for the customers. It is possible to manufacture rolled products up to 6×1500 mm (steel grade S355MC) in accordance with EN 10149-2 using the existing equipment without exceeding the existing process constraints during its operation and without upgrading. It is possible to further master the rolled products, which are manufactured according to the TMCP technology.
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Rigail-Cedeño, Andres F., Antonio Diaz-Barrios, Juan Gallardo-Bastidas, Stefania Ullaguari-Loor, and Nicolás Morales-Fuentes. "Recycled HDPE/PET Clay Nanocomposites." Key Engineering Materials 821 (September 2019): 67–73. http://dx.doi.org/10.4028/www.scientific.net/kem.821.67.
Повний текст джерелаАнотація:
Recycling waste plastics will support the preservation of natural resources and energy consumption. New challenges arise for the development of products that take advantage of solid waste. Upgrading recycled plastics using nanotechnology can tailor and consequently improve plastic properties for industrial applications. This research aims to process and relate the morphology and thermo-mechanical properties of recycled high-density polyethylene (rHDPE) and recycled polyethylene terephthalate (rPET) clay nanocomposites. Blends of rHDPE (75 wt %) coming from packaging and rPET (25 wt %) from bottles were mixed with two organoclays (Cloisite 20A and Cloisite 30B) (3 wt %) and a compatibilizer agent based on ethylene-glycidyl methacrylate (EGMA) (5 wt %). The recycled plastics nanocomposites were processed using a single-screw extruder incorporating a dispersive and distributive mixer and an injection molding machine. Several techniques were used to characterize the dispersion, morphology, mechanical properties and compatibilization of these composite blends. The reinforcing effect of rPET in the continuous rHDPE phase depended on the organoclay type and the compatibilizer additive. Both organoclays increased the stiffness and strength of rHDPE and rPET as evidenced by an increase in the corresponding Young modulus and ultimate tensile strength. EGMA increased the compatibility in the recycle plastics blend and in the clays nanocomposites as evidenced in elongation and energy at break results. On the other side, Cloisite 20A showed to be more compatible with EGMA than Cloisite 30B in these rHDPE/rPET blends based on the thermo-mechanical properties results.
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Pozza, Luca, Anna Degli Esposti, Alessandra Bonoli, Diego Talledo, Luca Barbaresi, Giovanni Semprini, and Marco Savoia. "Multidisciplinary Performance Assessment of an Eco-Sustainable RC-Framed Skin for the Integrated Upgrading of Existing Buildings." Sustainability 13, no. 16 (August 17, 2021): 9225. http://dx.doi.org/10.3390/su13169225.
Повний текст джерелаАнотація:
Recent earthquakes have highlighted a general inadequacy of the existing building stock in Italy and the need to address this critical issue by increasing its structural resilience. At the same time, the problem of energy consumption in existing residential and commercial buildings is increasingly significant and incompatible with the environmental targets set by governments. Considering all the aforementioned aspects, the seismic upgrading of existing buildings, based on the use of an eco-friendly and sustainable technology, has become more and more relevant and different intervention approaches have been developed. This paper aims to provide a multidisciplinary approach for the performance assessment of an eco-friendly and sustainable RC-framed skin for integrated refurbishment of existing buildings. A preliminary description of such skin technology is provided with particular attention to the simultaneous improvement of structural (e.g., seismic) and non-structural (e.g., energy, acoustic) performances and to issues concerning the limitation of invasiveness and interruption of use of the building. Technological details and in situ installation phases are described with special regard to connection and interaction with the existing building. Procedures for the assessment of upgraded building performances, in terms of seismic capacity and thermo-hygrometric and acoustic performances, are defined and applied to a selected basic cell structure. The feasibility and sustainability of the proposed upgrading intervention is finally investigated by means of a holistic Life Cycle Assessment for environmental impact and Life Cycle Cost for an economic evaluation. Finally, results from a multidisciplinary performance assessment are critically discussed by relating the performance aspects to the technological and installation issues.
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Mendecka, Barbara, Giovanni Di Ilio, and Lidia Lombardi. "Thermo-Fluid Dynamic and Kinetic Modeling of Hydrothermal Carbonization of Olive Pomace in a Batch Reactor." Energies 13, no. 16 (August 11, 2020): 4142. http://dx.doi.org/10.3390/en13164142.
Повний текст джерелаАнотація:
Hydrothermal carbonization (HTC) represents one of the emerging and most promising technologies for upgrading biomass. Among the residual biomass waste, olive pomace and olive mill wastewater may be seen as valuable energy sources, especially for the Mediterranean countries, given the key role of the olive oil industry in those regions. This paper deals with the thermo-fluid dynamic performance of the HTC process of olive pomace. Computational Fluid Dynamics (CFD) modeling is employed in this study to numerically simulate such a process in batch reactor with the aim of understanding the complex fluid dynamics, heat transfer and reaction kinetics phenomena occurring under hydrothermal conditions. A parametric analysis is performed to evaluate the temperature fields inside the reactor and the output mass yields as a function of the power input required by the process. Velocity flow fields and the spatial distribution of the mixture during the process are also investigated to understand the change in feed conversion at different regions within the tubular reactor under different reaction times. The numerical results are validated and compared with experimental measurements conducted previously on a similar batch reactor. The model predictions are found to be in line with the experimental findings, thus laying the foundations for further modeling improvements towards the design optimization and scale-up of HTC reactors.
Дисертації з теми "Thermo-upgrading"
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Noubli, Halima. "Développement d’un nouveau thermo-transformateur à absorption-démixtion : optimisation conjointe du cycle et du mélange de travail." Thesis, Vandoeuvre-les-Nancy, INPL, 2010. http://www.theses.fr/2010INPL089N/document.
Повний текст джерелаАнотація:
Ce travail porte sur l’étude d’un nouveau type de thermo-transformateur à absorption-démixtion (TTAD) utilisant un mélange présentant une lacune de miscibilité à basse température. Dans ce cycle, l’opération de séparation, est effectuée par décantation gravitaire par simple refroidissement du mélange. La séparation est ainsi énergétiquement gratuite et permet d’atteindre des rendements thermiques plus élevés que ceux des pompes à chaleur à absorption classiques dans lesquelles la séparation s’effectue par distillation.Afin de trouver des mélanges de travail pour atteindre un saut thermique de 50°C, un outil de simulation numérique a été développé pour évaluer les performances des TTAD en fonction des conditions opératoires (rapport d’alimentation et nombre d’étages de la colonne de rectification inverse) et des caractéristiques des composés du mélange de travail (Cp, Lv, paramètres caractéristiques des équilibres liquide-liquide et liquide-vapeur). L’optimisation des conditions opératoires a ainsi permis d’obtenir un saut thermique maximal de 12,4°C pour le mélange n-heptane / DMF pris comme référence. En faisant varier les propriétés des composés autour de celles de ce mélange de référence, un saut maximum de 32°C a été calculé pour un mélange fictif. L’étude de 17 mélanges réels a permis atteindre 21°C de saut thermique. Une liste d’autres mélanges à étudier a été établie. A l’aide d’une unité pilote d’une puissance de 4kW, des mesures expérimentales des performances du cycle modifié de TTAD pour le mélange n-heptane / DMF ont été réalisées et démontré la faisabilité de ce cycle même si le saut thermique de 11°C atteint au maximum est inférieur à celui calculé par simulationThis work is a study of a new type of Absorption-Demixing Heat Transformer (ADHT), using a mixture exhibiting a miscibility gap at low temperature. In this cycle, the separation step is performed by settling obtained after cooling the mixture. The separation is then energetically free and enables to reach thermal yields higher than those obtained for classical absorption heat transformers where separation is done by distillation.In order to find suitable working mixtures to reach temperature lift of 50°C, a numerical simulation tool was developed to calculate ADHT performances. This tool enabled to calculate thermal yield and thermal lift for different values of operating parameters (molar feed ratio, number of stages of rectification column) and different properties of working mixtures (Cp, Lv, parameters characterizing liquid-liquid and liquid-vapour equilibria). The best operating conditions allowed reaching a 12,4°C thermal lift for the n-heptane / DMF mixture takes as a reference mixture. By varying the mixture properties around the values of the reference mixture properties, a maximal thermal lift of 32°C was reached for an imaginary mixture. 17 real mixtures were also studied and enabled to reach a 21°C temperature lift. A list of other working mixtures that should be suitable was established. A 4 kW ADHT pilot unit was designed and built. The technical feasibility of this cycle was then experimentally demonstrated with this unit. A maximum temperature lift of 11°C was measured with the n-heptane / DMF mixture that is lower than the values calculated by simulation
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Порядіна, Дар`я Сергіївна. "Підвищення рівня енергоефективності гімназії біотехнологій № 177 за рахунок використання сонячних колекторів". Master's thesis, КПІ ім. Ігоря Сікорського, 2019. https://ela.kpi.ua/handle/123456789/32076.
Повний текст джерелаАнотація:
Магістерська дисертація «Підвищення енергетичної ефективності гімназії новітніх біотехнологій №177» складається з 123 сторінок, 15 рисунків,
57 таблиць, а також містить 20 джерел в переліку посилань.
Метою роботи є визначення доцільності проведення термомодернізації та моделювання геліосистеми для гарячого водопостачання у програмному середовищі.
Завдання дослідження – розрахунок теплових та електричних навантажень, аналіз енергоспоживання, визначення економічного ефекту впровадження заходів з енергозбереження.
Предмет дослідження – вивчення конструктивних і енергетичних характеристик об’єкту при розробці різних сценарних варіативних моделей та географічного розташування.
Наукова новизна магістерської дисертації полягає у оцінюванні фінансових показників проекту термомодернізації будівлі двома шляхами: розрахунок ефективності окремо кожного заходу та моделювання геліосистеми у програмному середовищі Tsol.
Результати досліджень були апробовані та викладені на 2-й науково-технічній конференції магістрантів ІЕЕ 21 – 22 листопада 2019.Master's thesis «Improving the energy efficiency of the high school of the latest biotechnology №177» consists of 123 pages, 15 figures, 57 tables, and also contains 20 sources in the list of references. The purpose of the work is to determine the expediency of thermo-modernization and modeling of the solar system for hot water supply in the software environment. Task of the research - calculation of thermal and electrical loads, analysis of energy consumption, determination of the economic effect of the implementation of energy conservation measures, to study the solar energy potential of Ukraine, determining the feasibility of using the solar system for hot water needs. The subject of the study is the study of the constructive and energy characteristics of the object in the development of various scenario variational models and geographic location. Actuality is the effective use of solar energy in solar systems in climates Ukraine for energy purposes. The object of study- a preschool institution №712. The scientific novelty of the master's thesis consists in evaluating the financial indicators of the project of thermo-modernization of a residential building in two ways: the calculation of the efficiency of each measure separately and modeling the solar system in the Tsol software environment.
Тези доповідей конференцій з теми "Thermo-upgrading"
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Almodaris, Mohamed, Sara Khorasani, Jocin James Abraham, and Nesrin Ozalp. "Simulation of Solar Thermo-Chemical Hydrogen Production Techniques." In ASME/JSME 2011 8th Thermal Engineering Joint Conference. ASMEDC, 2011. http://dx.doi.org/10.1115/ajtec2011-44387.
Повний текст джерелаАнотація:
This paper presents material and energy process-step models of hydrogen production via concentrated solar energy using Aspen Plus®. The paper provides a thorough comparison of solar cracking and solar reforming of methane processes against conventional steam methane reforming. The material and energy balances show that solar cracking is the most environmentally friendly hydrogen production technique. Some of the primary advantages of solar cracking include (1) elimination of CO2 emission, (2) elimination of costs associated with CO2 sequestration, transportation, and storage, and (3) generation of two commercially viable products, namely carbon black and hydrogen which can be used both as a fuel and a commodity. Considering the hydrogen shortage for different hydrogenation and fuel upgrading processes that the petrochemical industry is facing today, hydrogen production from solar cracking may offer an alternative solution. Therefore, it is important to find less energy intensive and more environmentally friendly hydrogen production techniques to meet the demand of industry. The results show that solar cracking is a more environmentally friendly and commercially competitive process compared to solar reforming and steam reforming considering that it produces virtually no carbon dioxide, but produces the commercially viable carbon black as a by-product.
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Ismail, Islam, Ahmed Emara, and El Sayed Abdel Razek. "Thermo Mechanical Analysis of a Direct Injection Heavy Duty Diesel Engine Piston Using FEA." In ASME 2016 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/imece2016-66160.
Повний текст джерелаАнотація:
This paper involves simulation of a 4-stroke direct injection heavy duty diesel engine piston made of aluminum silicon alloy to determine its temperature field, stress distribution and deformation at the conditions of upgrading the engine power from 300 HP to 350 HP. Turbocharger is the way used to enhance the engine power from 300 HP to 350 HP beside improving the fuel injection system. When the engine power is upgraded, high temperature and pressure will be developed because the engine will run at high loads. The piston is subjected to the coupled action of the thermal effect due to the transfer of heat from the head to the body and the mechanical effect represented by the combustion pressure and the inertial load due to the important change of direction of the piston in the cylinder bore. This results in producing stresses in the piston and if these stresses exceed the designed values, the failure of the piston is the result. Finite element analysis (FEA) is considered as one of the best numerical tools to model and analyze the physical systems. The three dimensional piston model was developed in Solid-Works and imported into ANSYS software. Finite element analysis is considered Code for preprocessing, loading and post processing. The simulation parameters used in this paper were combustion pressure, inertial effects and temperature. Diesel RK software is used to simulate the thermal analysis of engine cycle at each case of engine power 300 HP and 350 HP. Also, this model included the effect of the heat flow on the piston to overcome the whole area of the piston is used to illustrate the temperature distribution on the total area of the piston. This area divided into piston surface area and sidle area of piston which included the groves of rings (pressure and oil). The heat transfer coefficient is determined in each area of the piston according to the mechanism of heat transfer. Finally, the results of two different piston conditions are compared with each other. The highest temperature appeared at the combustion chamber side which occurred at the edges of the piston top face in direct contact with the hot gases in the radial. The piston deformation value is within a safe margin and below the gap between the piston and the cylinder bore in case of engine power of 350 HP. The highest calculated value of stresses was below the yield stress of the piston material at elevated temperatures and engine brake power of 350 HP. Hence the piston would withstand the induced stresses during work cycles.