Дисертації з теми "Thermal and mechanical models"
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Nguyen, Van-Tri. "Thermal and thermo-mechanical behavior of energy piles." Thesis, Paris Est, 2017. http://www.theses.fr/2017PESC1160/document.
Повний текст джерелаThe thermal and thermo-mechanical behavior of energy piles is investigated by various approaches: laboratory measurement on small soil samples, physical modeling on small-scale pile, experiments on real-scale pile, and analytical/numerical calculations. First, the thermal conductivity of unsaturated loess is measured simultaneously with moisture content and suction. The results show a unique relationship between thermal conductivity and moisture content during a wetting/drying cycle while a clear hysteresis loop can be observed on the relationship between thermal conductivity and suction. Second, thermal tests are performed on a full-scale experimental energy pile to observe heat transfer at the real scale. Third, an analytical solution is proposed to simulate conductive heat transfer from an energy pile to the surrounding soil during heating. The above-mentioned tasks related to the thermal behavior are then completed by studies on the thermo-mechanical behavior of energy piles. On one hand, experiments are performed on a small-scale pile installed either in dry sand or in saturated clay. Thirty thermal cycles, representing thirty annual cycles, are applied to the pile under various constant pile head loads. The results show irreversible pile head settlement with thermal cycles; the settlement is higher at higher pile head load. In addition, the irreversible thermal settlement is the most significant during the first cycles; it becomes negligible at high number of cycles. On the other hand, the experimental work with small-scale pile is completed with numerical calculations by using the finite element method. This approach is first validated with the results on small-scale pile prior to be used to predict the results of full-scale experiments
Vilaithong, Rummiya [Verfasser]. "Models for Thermal and Mechanical Monitoring of Power Transformers / Rummiya Vilaithong." Aachen : Shaker, 2011. http://d-nb.info/1070150282/34.
Повний текст джерелаKiley, Erin Marie. "Reduced-Dimensional Coupled Electromagnetic, Thermal, and Mechanical Models of Microwave Sintering." Digital WPI, 2016. https://digitalcommons.wpi.edu/etd-dissertations/212.
Повний текст джерелаOgata, Sho. "Development of Coupled Thermal-Hydraulic-Mechanical-Chemical Models for Predicting Rock Permeability Change." Doctoral thesis, Kyoto University, 2019. http://hdl.handle.net/2433/244532.
Повний текст джерела0048
新制・課程博士
博士(工学)
甲第22051号
工博第4632号
新制||工||1722(附属図書館)
京都大学大学院工学研究科都市社会工学専攻
(主査)教授 岸田 潔, 教授 木村 亮, 教授 小池 克明
学位規則第4条第1項該当
Doctor of Philosophy (Engineering)
Kyoto University
DFAM
Evans, Thomas C. (Thomas Carl) 1971. "Statistical usage models in mobile processor thermal design and testing." Thesis, Massachusetts Institute of Technology, 2003. http://hdl.handle.net/1721.1/89389.
Повний текст джерелаIncludes bibliographical references (p. 77).
by Thomas C. Evans.
S.M.
Kokorev, A. E., A. O. Kiriak, and О. Г. Аврунін. "Some Models of Mechanical and Thermal Properties of Skin in the Context of Plastic Surgery." Thesis, Kharkiv, KNURE, 2019. http://openarchive.nure.ua/handle/document/10196.
Повний текст джерелаUrquiza, Fernandez Guillermo 1978. "Thermal model of an annular fuel cell." Thesis, Massachusetts Institute of Technology, 2003. http://hdl.handle.net/1721.1/89920.
Повний текст джерелаIncludes bibliographical references (p. 81).
by Guillermo Urquiza Fernandez.
S.M.and S.B.
Lahoori, Mojdeh. "Thermo-hydro-mechanical behavior of an embankment to store thermal energy." Electronic Thesis or Diss., Université de Lorraine, 2020. http://www.theses.fr/2020LORR0252.
Повний текст джерелаNowadays, thermal energy storage in geostructures like embankments can be possible by installing the horizontal heat exchangers in different layers of compacted soil. In this system, the thermal energy is stored in summer via a fluid, circulating in the heat exchangers, to be extracted in the demand period. When the serviceability of embankment as a medium to store the thermal energy starts, the compacted soil will be subjected to the daily and seasonally temperature variations. These seasonal temperature variations could modify the thermo-hydro-mechanical performance of the compacted soil. Thus, the aim of this study is to investigate the thermal and mechanical performances of a compacted soil when it is subjected to monotonic and cyclic temperature variations. The studied soil is a sandy lean clay that is frequently used in embankment constructions in France. The thermal and mechanical behavior of the soil are investigated at a compaction state corresponding to the optimal thermal properties. However, this compacted soil is unsaturated and the estimation of its thermal properties is complex. In this study, an inverse analytical model is proposed to estimate the thermal properties of the soil using temperature monitoring in the range of 20 to 50 °C in a soil compacted in a large container. The estimated thermal parameters were compared to classical laboratory measurements (transient and steady-state methods). The comparison showed that the estimated values were close to the results obtained in transient laboratory method. Using this method, the thermal efficiency of the compacted soil can be verified in the lifetime of the storage system. To ensure the structure stability, long-term mechanical response of these systems subjected to monotonic and cyclic temperature variations should be investigated. To achieve this aim, using temperature-controlled oedometric and direct shear devices, consolidation and shear parameters of the studied soil at different monotonic (5, 20, and 50 °C) and cyclic (5 to 50 °C) temperatures were investigated. The results of temperature-controlled oedometric tests showed that the effect of the temperature variation is more pronounced under vertical pressures higher than the preconsolidation pressure. The compression and swelling indexes could be considered independent of temperature variations. Therefore, the overall settlement of the embankment due to thermal variation near the heat exchangers could be considered negligible. The results of temperature-controlled direct shear tests showed that the temperature variations (monotonic heating or cooling, or temperature cycles) increased the cohesion which is beneficial for the bearing capacity and slope stability of embankments. These results can be directly used in the design of embankments to store thermal energy exposed to similar thermo-mechanical paths. Finally, the thermal performance of the compacted soil is verified using a numerical simulation considering the soil atmosphere interaction. Different depths installation of heat exchanger loops and different heat storage scenarios were simulated. The results showed that the compacted soil increases 8.5% the systems performance compared to the horizontal loop installation in the local soil. The results of two different scenarios show that an inlet fluid temperature of 50 °C in summer increases highly the system performance (13.7% to 41.4%) while the improvement is less significant (0% to 4.8%) for the ambient inlet temperature. Moreover, a deeper installation of horizontal loops increases the system performance. From the numerical simulation results can be concealed that the embankment is in interaction with the atmosphere from its upper and lateral surfaces, the thermal efficiency of the structure could be affected due to heat losses. Therefore, it is preferable to place the heat exchangers away from the top and side surfaces
Poller, Tilo. "Thermal and thermal-mechanical simulation for the prediction of fatigue processes in packages for power semiconductor devices." Doctoral thesis, Universitätsbibliothek Chemnitz, 2015. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-qucosa-154320.
Повний текст джерелаFür die Entwicklung von Umrichtern ist die Kenntnis über die Zuverlässigkeit der Leistungselektronik ein wichtiges Kernthema. Insbesondere für Offshore-Anwendungen ist das Wissen über die stattfindenden Ermüdungsprozesse und die Abschätzung der zu erwartenden Lebensdauer der Bauteile essentiell. Hierfür hat sich die Simulation als ein wichtiges Werkzeug für die Entwicklung und Lebensdauerbewertung von leistungselektronischen Anlagen etabliert. In der folgenden Arbeit wird das thermische und das thermisch-mechanische Verhalten der Leistungselektronik mittels Simulationen untersucht. Hierzu wird ein Vergleich zwischen verschiedenen thermischen Modellen für Leistungsbauelemente durchgeführt. Schwerpunkt ist die Beschreibung der thermischen Kopplung zwischen den Chips und deren Einfluss auf die Lebensdauerabschätzung. Ein weiterer Schwerpunkt ist das Leistungsmodul, welches sich als ein Standardgehäuse etabliert hat. Dazu wird erklärt, wie die Variation der Einschaltzeit im aktiven Lastwechseltest den Fehlermodus dieses Gehäusetyps beeinflusst. Weiterhin wird untersucht, wie SiC als Leistungshalbleiter und DAB als Substrat die Zuverlässigkeit beein- flusst. Der Press-Pack ist für Hochleistungsapplikationen von hohem Interesse, da dieses Gehäuse im elektrischen Fehlerfall ohne äußere Unterstützung kurzschliesst. Jedoch ist das Wissen über diese Gehäusetechnologie unter aktiven Lastwechselbedingungen sehr limitiert. Mit Hilfe von Simulationen wird dieses Verhalten untersucht und mögliche Schwachpunkte abgeleitet. Am Ende der Arbeit werden Möglichkeiten untersucht, wie Mithilfe von FEM Simulationen die Lebensdauer von Leistungsmodulen evaluiert werden kann
Poller, Tilo. "Thermal and thermal-mechanical simulation for the prediction of fatigue processes in packages for power semiconductor devices." Doctoral thesis, Universitätsverlag der Technischen Universität Chemnitz, 2014. https://monarch.qucosa.de/id/qucosa%3A20135.
Повний текст джерелаFür die Entwicklung von Umrichtern ist die Kenntnis über die Zuverlässigkeit der Leistungselektronik ein wichtiges Kernthema. Insbesondere für Offshore-Anwendungen ist das Wissen über die stattfindenden Ermüdungsprozesse und die Abschätzung der zu erwartenden Lebensdauer der Bauteile essentiell. Hierfür hat sich die Simulation als ein wichtiges Werkzeug für die Entwicklung und Lebensdauerbewertung von leistungselektronischen Anlagen etabliert. In der folgenden Arbeit wird das thermische und das thermisch-mechanische Verhalten der Leistungselektronik mittels Simulationen untersucht. Hierzu wird ein Vergleich zwischen verschiedenen thermischen Modellen für Leistungsbauelemente durchgeführt. Schwerpunkt ist die Beschreibung der thermischen Kopplung zwischen den Chips und deren Einfluss auf die Lebensdauerabschätzung. Ein weiterer Schwerpunkt ist das Leistungsmodul, welches sich als ein Standardgehäuse etabliert hat. Dazu wird erklärt, wie die Variation der Einschaltzeit im aktiven Lastwechseltest den Fehlermodus dieses Gehäusetyps beeinflusst. Weiterhin wird untersucht, wie SiC als Leistungshalbleiter und DAB als Substrat die Zuverlässigkeit beein- flusst. Der Press-Pack ist für Hochleistungsapplikationen von hohem Interesse, da dieses Gehäuse im elektrischen Fehlerfall ohne äußere Unterstützung kurzschliesst. Jedoch ist das Wissen über diese Gehäusetechnologie unter aktiven Lastwechselbedingungen sehr limitiert. Mit Hilfe von Simulationen wird dieses Verhalten untersucht und mögliche Schwachpunkte abgeleitet. Am Ende der Arbeit werden Möglichkeiten untersucht, wie Mithilfe von FEM Simulationen die Lebensdauer von Leistungsmodulen evaluiert werden kann.
Liu, Jianxin. "A porosity-based model for coupled thermal-hydraulic-mechanical processes." University of Western Australia. Centre for Petroleum, Fuels and Energy, 2010. http://theses.library.uwa.edu.au/adt-WU2010.0113.
Повний текст джерелаUchaipichat, Anuchit Civil & Environmental Engineering Faculty of Engineering UNSW. "Experimental investigation and constitutive modelling of thermo-hydro-mechanical coupling in unsaturated soils." Awarded by:University of New South Wales. School of Civil and Environmental Engineering, 2005. http://handle.unsw.edu.au/1959.4/22068.
Повний текст джерелаLi, Zhonglin. "Tribological, Kinetic and Thermal Characteristics of Copper Chemical Mechanical Planarization." Diss., Tucson, Arizona : University of Arizona, 2005. http://etd.library.arizona.edu/etd/GetFileServlet?file=file:///data1/pdf/etd/azu%5Fetd%5F1378%5F1%5Fm.pdf&type=application/pdf.
Повний текст джерелаHo, Hsin-Ni. "Development and evaluation of a thermal model for haptic interfaces." Thesis, Massachusetts Institute of Technology, 2007. http://hdl.handle.net/1721.1/38696.
Повний текст джерелаIncludes bibliographical references (leaves 147-152).
The thermal interaction between the skin and an object is influenced by the thermal properties and initial temperatures of the skin and object, and by the contact force and surface roughness of the contact surfaces. This thermal interaction is modeled in this research which characterizes the transient thermal responses during contact. The thermal model was evaluated in psychophysical and physiological experiments by determining whether simulated thermal feedback generated based on the model was capable of conveying information to users that was similar to that provided by real materials, and by comparing the temperature responses of the skin predicted by the model and elicited by real materials. In order to obtain precise skin temperature measurements, an infrared thermal measurement system was designed to overcome the limitations imposed by thermal sensors and to determine the influence of contact pressure on the skin temperature responses during contact. The results from the psychophysical and physiological experiments validated the thermal model proposed in this research within the typical contact force range of manual exploration. A thermal display based on this model is able to convey thermal cues that can be used to perceive and identify objects as effectively as those provided by real materials.
by Hsin-Ni Ho.
Ph.D.
Martin, Gregory T. (Gregory Thomas) 1966. "A thermal model for rapid hyperthermia therapy planning and evaluation." Thesis, Massachusetts Institute of Technology, 1995. http://hdl.handle.net/1721.1/11493.
Повний текст джерелаRadhakrishnan, Sadhana. "Stress Analysis of Embedded Devices Under Thermal Cycling." PDXScholar, 2018. https://pdxscholar.library.pdx.edu/open_access_etds/4075.
Повний текст джерелаHossain, Mohammad Akram. "Thermal Characteristics of Microinverters on Dual-axis Trackers." Case Western Reserve University School of Graduate Studies / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=case1396888841.
Повний текст джерелаHäggström, Martin. "Thermal modelling of a truck gearbox." Thesis, Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-63753.
Повний текст джерелаStell, Brandon. "Thermal-Fluid Dynamic Model of Luge Steels." DigitalCommons@CalPoly, 2017. https://digitalcommons.calpoly.edu/theses/1793.
Повний текст джерелаVerma, Navni. "Development and Demonstration of Thermal Contact Conductance (TCC) Models for Contact Between Metallic Surfaces." The Ohio State University, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=osu1555452213472626.
Повний текст джерелаZhou, Yafei. "Thermo-hydro-mechanical models for saturated and unsaturated porous media." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp02/NQ36805.pdf.
Повний текст джерелаAL-AZMI, BADER SHABEEB. "ANALYSIS OF TRANSPORT MODELS AND COMPUTATION ALGORITHMS FOR FLOW THROUGH POROUS MEDIA." The Ohio State University, 2003. http://rave.ohiolink.edu/etdc/view?acc_num=osu1051059625.
Повний текст джерелаAlrobaian, Abdulrahman Abdullah. "Multi-Spectral Remote Thermal Imaging for Surface Emissivity and Estimation of Roof R-Values Using Physics-Based and Data Mining Models." University of Dayton / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=dayton148898993590168.
Повний текст джерелаTian, Ning. "A general thermal thickness model and a heating rate related ignition criterion for combustible solids." Thesis, The University of North Carolina at Charlotte, 2014. http://pqdtopen.proquest.com/#viewpdf?dispub=3608480.
Повний текст джерелаThe objective of this research is to investigate the ignition behavior of combustible solid materials in fire. Three key tasks were conducted for it: (1) a new theoretical temperature profile prediction model, referred as General Thermal Thickness (GTT) model, was proposed and then validated by the experimental data from E-glass/polyester composite panels at different heat fluxes; (2) a new ignition criterion (the Heating Rate-related Ignition Temperature (HRIT) criterion) was proposed and its accuracy under various heat fluxes was shown by comparing with experimental data of different materials; (3) uncertainty and sensitivity analyses were conducted on a new integrated ignition prediction model (i.e. the GTT combined with the HRIT ignition criterion), to investigate the variations in ignition and identify key affecting factors.
A simplified heat transfer model was constructed and solved in order to theoretically predict the temperature profile of the GTT combustible solid materials subjected to one-sided heating. The theoretical solution of the GTT model was validated by experimental data from intermediate-scale calorimeter fire tests of E-glass fiber reinforced polyester composite panels at three heat flux levels. The GTT model was also verified by results from finite element modeling predictions. Compared with the classical theoretical models (such as thermally thick (TTK) and thermally thin (TTN) models), the GTT model is more accurate and it is valid through the whole range of thermal thickness.
Since existing ignition criteria cannot handle the variations of external heat flux and surrounding environmental conditions, a new ignition criterion referred as Heating Rate-related Ignition Temperature (HRIT) criterion, was proposed, developed and validated. In the new HRIT ignition criterion both the surface temperature and its increasing rate are used to determine ignition. The accuracy of the HRIT ignition criterion under different external heat fluxes was validated by the piloted ignition data of a thermoplastic material (Black PMMA), a thermoset composite material (E-glass fiber reinforced polyester composite) and a cellulosic material (Red Oak) subjected to different external heat fluxes. The adaptability of the HRIT criterion in different surrounding environmental conditions was also discussed.
Both local and global sensitivity and uncertainty analyses were performed to understand the variations and identify important factors affecting the ignition process. First, the local sensitivity analysis was applied to the GTT model and the HRIT criterion separately. Then a Monte Carlo analysis using the Latin Hypercube Sampling method was performed on the integrated ignition prediction model (the GTT model combined with HRIT ignition criterion), yielding the global sensitivity coefficients (or important index) and uncertainty ranges of the ignition.
In summary, unlike classical temperature profile prediction models such as thermally thick or thermally thin models whose applications are restricted by thermal thickness, the new GTT model proposed in this research is valid within the whole range of thermal thickness. The challenge of the existing ignition criteria handling varying heat fluxes and surrounding environment was resolved by the new HRIT ignition criterion, and the accuracy of the HRIT criterion was validated by experimental data from three materials. The important affecting factors and uncertainties during ignition process were identified in this research through the uncertainty and sensitivity study, which can serve as a guideline for fire safety design
Pratikakis, Nikolaos. "Mathematical modeling of rail gun." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2006. http://library.nps.navy.mil/uhtbin/hyperion/06Sep%5FPratikakis.pdf.
Повний текст джерелаThesis Advisor(s): Kwon Young. "September 2006." Includes bibliographical references (p. 77-78). Also available in print.
Rodríguez, Alvarado Juan Fernando. "Validation of a numerical model for the analysis of thermal-fluid behavior in a solar concentrator vessel." Thesis, Massachusetts Institute of Technology, 2010. http://hdl.handle.net/1721.1/59936.
Повний текст джерелаCataloged from PDF version of thesis.
Includes bibliographical references (p. 44).
The need for innovation in the renewable energy sector is an ever-growing concern. With national-level disasters in the Gulf of Mexico, the necessity to begin the drive to develop effective and practical alternative energy sources becomes a more pressing concern. The CSPond project is an attempt to design a more simple solar thermal energy generation system that additionally addresses the intermittence issue. The CSPond system calls for a large container in which special salt mixtures are molten by solar thermal energy. The large container also acts as a thermal energy storage to address the intermittence issue that has held back the widespread application of solar energy systems. This thesis presents a validation analysis of a numerical simulation of a molten salt system. The simulation is part of a larger design effort to develop a viable solar thermal energy option which incorporates short to medium-term thermal storage. To validate the numerical model, a scaled version of the proposed solar vessel was used in the solar simulator built by Professor Slocum's PERG to simulate normal operation procedures. This data was then compared to the numerical simulations. This comparison found that the numerical simulation does not capture the dynamics of the temperature rise in the system, but that it does capture the Rayleigh-Taylor instabilities, characteristic of convection. Solutions to the issues identified above are proposed and analyzed. These include the consideration of several modes of thermal interactions with the environment, the optical interactions between the solar beam and the molten salt medium, modifying the boundary conditions and finally, including the temperature of all relevant thermophysical properties to better capture the convective behavior of the molten salt system.
by Juan Fernando Rodríguez Alvarado.
S.B.
Trunova, Olena. "Effect of thermal and mechanical loadings on the degradation and failure modes of APS TBCs." [S.l.] : [s.n.], 2006. http://deposit.ddb.de/cgi-bin/dokserv?idn=982570570.
Повний текст джерелаReese, Gordon Scott. "Analytical Thermal Model of Friction Stir Welding with Spatially Distributed Heat Source." BYU ScholarsArchive, 2012. https://scholarsarchive.byu.edu/etd/3328.
Повний текст джерелаFan, Guodong. "Model Order Reduction of Multi-Dimensional Partial Differential Equations for Electrochemical-Thermal Modeling of Large-Format Lithium-ion Batteries." The Ohio State University, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=osu1468917668.
Повний текст джерелаTopel, Monika. "Steam Turbine Thermal Modeling for Improved Transient Operation." Licentiate thesis, KTH, Kraft- och värmeteknologi, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-156196.
Повний текст джерелаQC 20141128
Guo, Ruilan. "Dependence of physical and mechanical properties on polymer architecture for model polymer networks." Diss., Atlanta, Ga. : Georgia Institute of Technology, 2008. http://hdl.handle.net/1853/22642.
Повний текст джерелаCommittee Chair: Karl I. Jacob; Committee Member: Anselm C. Griffin; Committee Member: C. P. Wong; Committee Member: Rina Tannenbaum; Committee Member: William J. Koros; Committee Member: Yonathan S. Thio.
Hall, James B. "Measurement of Thermal Diffusivities Using the Distributed Source, Finite Absorption Model." BYU ScholarsArchive, 2012. https://scholarsarchive.byu.edu/etd/3467.
Повний текст джерелаDickson, Matthew R. "Handheld infrared camera use for suicide bomb detection: feasibility of use for thermal model comparison." Thesis, Kansas State University, 2008. http://hdl.handle.net/2097/1045.
Повний текст джерелаDepartment of Mechanical and Nuclear Engineering
Akira Tokuhiro
One of the most deadly tactics used by today’s terrorists is suicide bombing. Sensors have been developed and are being used in different situations to detect weapons and the people initiating suicide bombing attacks. The ideal detection technology would be fast, accurate, effective from long distances, and safe for the both detector and the object being detected. One detector that has shown potential as a tool for detecting hidden weapons is an infrared detector. Infrared detectors are passive sensors that create infrared, or thermal, images without having to expose the subject to any radiation. These images show the heat signature that is given off by objects of interest. Previous studies using infrared detectors for concealed weapon detection have tried to observe the image of the weapon. These have been largely unsuccessful, however, because infrared waves will not readily penetrate clothing. The research presented here determines the feasibility of modeling the heat signature produced by a suicide bomber using thermal models that predict the temperature of the exterior layers of clothing worn. The goal is to be able to compare the images acquired of the suspected bomber to the expected temperatures from the thermal models. If the presence of a hidden weapon affects the emitted heat signature to a point in which the clothing temperatures are not responding as predicted by a model, it is possible a detection system may be created using these models as a comparator and signal for detection. This research also determines a temperature range for which an operator viewing infrared images for suicide bomb detection may be relatively certain of the presence of a foreign object. Testing was also completed to determine those variables that affect an infrared image in ways that help or hinder the use of the thermal models in predicting the temperatures that appear in the infrared images.
Dalke, Phillip Allen. "Model-Based Design and Analysis of Thermal Systems for the Ohio State EcoCARMobility Challenge Vehicle." The Ohio State University, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=osu159545443238678.
Повний текст джерелаSingh, Naveen Chandra Lall Pradeep. "Thermo-mechanical reliability models for life prediction of area array electronics in extreme environments." Auburn, Ala., 2006. http://repo.lib.auburn.edu/2006%20Spring/master's/SINGH_NAVEEN_54.pdf.
Повний текст джерелаNuzum, Sean Robert. "Aircraft Thermal Management using Liquefied Natural Gas." Wright State University / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=wright1462460693.
Повний текст джерелаCaliguri, Ryan P. "Comparison of Sensible Water Cooling, Ice building, and Phase Change Material in Thermal Energy Storage Tank Charging: Analytical Models and Experimental Data." University of Cincinnati / OhioLINK, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1627666292483648.
Повний текст джерелаAntón, Remírez Raúl. "Experimental and numerical study of the thermal and hydraulic effect of EMC screens in radio base stations : detailed and compact models." Doctoral thesis, KTH, Energiteknik, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-4265.
Повний текст джерелаQC 20100630
Filipovic-Gledja, Visnja. "A probability based unified model for predicting electrical, mechanical and thermal characteristics of stranded overhead-line conductors." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp02/NQ30086.pdf.
Повний текст джерелаEzeanya, Emeka K. "System Advisor Model (SAM) Simulation Modeling of a Concentrating Solar Thermal Power Plant with Comparison to Actual Performance Data." Thesis, University of Louisiana at Lafayette, 2018. http://pqdtopen.proquest.com/#viewpdf?dispub=10642898.
Повний текст джерелаThis thesis focused on the modeling and simulation of a 50 kW Concentrating Solar Power (CSP) plant, which is located in Crowley, Louisiana. The model was developed using System Advisor Model (SAM), which is software created by the National Renewable Energy Laboratory (NREL) for modeling and analyzing different renewable energy systems. The objective of this thesis is to develop a predictive model (using SAM) that will characterize the performance of the power plant and, thus, aid the analysis and evaluation of the plant’s performance. The power plant is a research facility of the Solar Thermal Applied Research and Testing (START) Lab. This facility is focused on the development and deployment of renewable energy systems, exploring solar power options in Louisiana, and providing insight into solar power development across different locations. The power plant uses water as its Heat Transfer Fluid (HTF). Part of the design constraint for the model is the low temperature requirement for the power cycle (88 °C–116 °C). Because the basic ORC model of SAM does not support this low temperature range, a custom power cycle was modeled using the user-defined power cycle option of SAM. Other characteristics and controls of the plant were also properly defined. The model was validated by comparing its predictions with the actual plant data. This comparison showed a good correlation between the predicted results and the actual plant data. The validated model was then used to perform parametric analyses across different locations. The analyses showed that by operating the power plant at the optimal combination of solar multiple and hours of storage, we can achieve about 70% reduction in the cost of electrical energy, which is, indeed, a significant cost reduction.
Narvaez, Javier A. "Thermal Conductivity of Poly-Alpha-Olefin (PAO)-Based Nanofluids." University of Dayton / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1282162148.
Повний текст джерелаFossier, Charlotte. "Investigations on the efficiency of truck axles and their hypoid gear set : A thermo-mechanical model." Thesis, Lyon, 2018. http://www.theses.fr/2018LYSEI019.
Повний текст джерелаTo fulfil customer demands, but also government regulations, the truck industry must decrease the fuel consumption and emissions of its vehicles. A key development is to improve the efficiency of the powertrain, which includes the axle. Until recently, optimisation of axle design has mainly concerned durability and noise aspects. The aim of this study is then to characterise the efficiency of truck axles. As for most of the mechanical transmissions, power dissipation in axles is due to gear mesh, rolling element bearings, seals and oil churning. Formulae already exist to estimate these power losses at a global level, but they are not always adapted to axles. Indeed, the main component of axles is a spiral bevel or a hypoid gear set. The influence of these special gears on efficiency is investigated here: their shape drives oil churning losses, while their tooth geometry and their kinematics impact friction at gear mesh. Therefore, the meshing friction of the gear set is also evaluated thanks to a local approach. The influence of some gear parameters is studied. However, power losses are influenced by temperature through oil viscosity. As previous experiments underline non-negligible temperature difference between components, it is necessary to consider local temperatures instead of a global oil temperature. Efficiency but also durability can be impacted by local hot spots. The thermal network method is used to model the thermal exchanges inside and outside the axle and to calculate temperature distribution. Usual efficiency tests on axles measure only global power loss and oil temperature: no evidence allows to confirm a power loss breakdown. Thus, a test campaign with temperature measurements is done and validates the model on local temperature calculation but also on estimation of component power losses. The model can be used at design stage for future development of axles
Hatzenbuehler, Mark A. "Modeling of jet vane heat-transfer characteristics and simulation of thermal response." Thesis, Monterey, California. Naval Postgraduate School, 1988. http://hdl.handle.net/10945/23314.
Повний текст джерелаThe development of a dynamic computational model capable of predicting, with the requisite design certainty, the transient thermal response of jet vane thrust control systems has been undertaken. The modeling and simulation procedures utilized are based on the concept that the thermal processes associated with jet vane operation can be put into a transfer function form commonly found in the discipline of automatic controls. Well established system identification methods are employed to formulate and verify the relationships between the various gains and frequencies of the transfer function model and experimental data provided by Naval Weapons Center, China Lake.
http://archive.org/details/modelingofjetvan00hatz
Lieutenant, United States Navy
Rodríguez, Buño Mariana. "Near and far field models of external fluid mechanics of Ocean Thermal Energy Conversion (OTEC) power plants." Thesis, Massachusetts Institute of Technology, 2013. http://hdl.handle.net/1721.1/79495.
Повний текст джерелаCataloged from PDF version of thesis.
Includes bibliographical references (p. 126-130).
The world is facing the challenge of finding new renewable sources of energy - first, in response to fossil fuel reserve depletion, and second, to reduce greenhouse gas emissions. Ocean Thermal Energy Conversion (OTEC) can provide renewable energy by making use of the temperature difference between the surface ocean and deep ocean water in a Rankine cycle. An OTEC plant pumps huge volumes of water from the surface and nearly 1 km depth, and releases it at an intermediate depth. The effects of this enormous flux are crucial to understand since disruption of the ambient temperature stratification can affect the efficiency of the plant itself and of adjacent plants. This thesis aims to study the external fluid mechanics of offshore OTEC power plants, to assess their environmental impact and to help analyze whether OTEC plants can provide a sustainable source of energy. Although there has been interest in OTEC for several decades, so far primarily physical and analytical models have been developed. In this study numerical models are developed to model OTEC operating plants: integral models for the near and intermediate field and a large-scale ocean general circulation model. Two strategies in modeling OTEC plant discharge are used to analyze plume dynamics: the "Brute Force" approach, in which a circulation model, MITgcm, computes the near, intermediate and far field mixing; and the "Distributed Sources and Sinks" approach, in which the near and intermediate field are represented in the circulation model by sources and sinks of mass computed by integral models. This study concludes that the Brute Force modeling strategy is highly computationally demanding and sometimes inaccurate. Such simulations are very sensitive to model resolution and may require the use of unrealistic model parameters. The Distributed Sources and Sinks approach was found to be capable of modeling the plume dynamics accurately. This method can be applied to the study of adjacent OTEC power plant interaction, redistribution of nutrients, and propagation of contaminants.
by Mariana Rodríguez Buño.
S.M.
SAMPATH, KUMAR RAGHAV. "NUMERICAL, EXPERIMENTAL AND ANALYTICAL STUDY OF THERMAL HEATING OF SPHERE AND DISK SHAPED BIOCRYSTALS EXPOSED TO 3 RDGENERATION SYNCHROTON SOURCES." University of Cincinnati / OhioLINK, 2006. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1155103284.
Повний текст джерелаMassé, Danielle D. "Effects of Lubrication Starvation on Flash Temperature for Thermal Mixed Elastohydrodynamic Gear Contacts." Wright State University / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=wright1574433184018376.
Повний текст джерелаPotdar, Akshay Anand. "Reducing the uncertainty of thermal model calibration using on-machine probing and data fusion." Thesis, University of Huddersfield, 2016. http://eprints.hud.ac.uk/id/eprint/31397/.
Повний текст джерелаKhasawneh, Hussam Jihad. "ANALYSIS OF HEAT-SPREADING THERMAL MANAGEMENT SOLUTIONS FOR LITHIUM-ION BATTERIES." The Ohio State University, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=osu1313603207.
Повний текст джерелаHuang, Zhida. "SIMULATION OF METAL GRAIN GROWTH IN LASER POWDER BED FUSION PROCESS USING PHASE FIELD THERMAL COUPLED MODEL." Case Western Reserve University School of Graduate Studies / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=case1554391043588225.
Повний текст джерелаManasrah, Ahmad. "Application and Analysis of Asymmetrical Hot and Cold Stimuli." Scholar Commons, 2016. http://scholarcommons.usf.edu/etd/6309.
Повний текст джерела