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Dissertations / Theses on the topic 'Thermal enhancemen'

Author: Grafiati

Published: 5 June 2025

Last updated: 15 July 2025

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1

Van, Buren Mark Anthony. "Thermal enhancement of urban receiving waters." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape8/PQDD_0002/NQ38334.pdf.

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2

Li, Haiying. "Study of thermally reworkable epoxy materials and thermal conductivity enhancement using carbon fiber for electronics packaging." Diss., Available online, Georgia Institute of Technology, 2004:, 2003. http://etd.gatech.edu/theses/available/etd-04062004-164718/unrestricted/li%5Fhaiying%5F200312%5Fphd.pdf.

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3

Kashfipour, Marjan Alsadat. "Thermal Conductivity Enhancement Of Polymer Based Materials." University of Akron / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=akron156415885613422.

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4

Natchimuthu, Chinnaraj Anand. "THERMAL CONDUCTIVITY ENHANCEMENT IN NANOFLUIDS -MATHEMATICAL MODEL." OpenSIUC, 2011. https://opensiuc.lib.siu.edu/theses/758.

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The study on developing a mathematical model for thermal conductivity enhancement in nanofluids was based on formation of nanoparticles into nanoclusters, nanolayer thickness, Brownian motion and volume fraction of nanoclusters. An equation for the thermal conductivity of nanofluids was developed. The expression developed successfully explained the enhanced thermal conductivity of nanofluids and led to some important conclusions. It was found that in this study the nanoparticles tend to form nanoclusters and the volume fraction of the nanoclusters and the trapped fluid in the nanocluster was

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5

Etheredge, Darrell Keith. "MULTIWALL CARBON NANOTUBE ARRAYS FOR THERMAL INTERFACE ENHANCEMENT." UKnowledge, 2012. http://uknowledge.uky.edu/me_etds/3.

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High performance/small package electronics create difficult thermal issues for integrated circuits. Challenges exist at material interfaces due to interfacial contact resistances. Multiwall carbon nanotube (MWCNT) arrays are considered to be excellent candidates for use as thermal interface materials (TIMs) due to outstanding thermal/mechanical properties. In this work, MWCNT array TIMs are analyzed in aluminum and carbon fiber composites via flash diffusivity analysis. The effect of TIM thickness, areal/bulk density, surface cleanliness, and volumetric packing fraction; along with the effect

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6

Teo, Chek Koon. "Digital enhancement of night vision and thermal images." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2003. http://library.nps.navy.mil/uhtbin/hyperion-image/03Dec%5FTeo%5FChek.pdf.

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Thesis (M.S. in Combat Systems Technology)--Naval Postgraduate School, December 2003.<br>Thesis advisor(s): Monique P. Fargues, Alfred W. Cooper. Includes bibliographical references (p. 75-76). Also available online.

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7

Whiffen, Thomas Richard. "Thermal mass enhancement for energy saving in UK offices." Thesis, University of Nottingham, 2016. http://eprints.nottingham.ac.uk/31564/.

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Energy use in buildings accounts for more than a third of global energy demand, with humans seeking to create comfortable internal environments year-round. In the UK, air or water active thermal mass systems have demonstrated viability at delivering energy efficient comfort to office spaces. Whilst an attractive proposition, there are limitations to the cooling capacity and dynamic thermal response, giving rise to overheating in poorly designed buildings. The thesis work presented documents the investigation into active thermal mass enhancement to a prototype ventilated hollow core sample. Thr

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8

Mehdizadeh, Seyedeh Neda. "Enhancement of Kelowna's biosolids to energy conversion with thermal pretreatments." Thesis, University of British Columbia, 2012. http://hdl.handle.net/2429/43563.

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9

Wei, William Lien Chin. "New Studies on Thermal Transport in Metal Additive Manufacturing Processes and Products." Research Showcase @ CMU, 2017. http://repository.cmu.edu/dissertations/1057.

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Additive manufacturing (AM) is a manufacturing technique that adds material, such as polymers, ceramics, and metals, in patterned layers to build three-dimensional parts for applications related to medicine, aviation, and energy. AM processes for metals like selective laser melting (SLM) hold the unique advantage of fabricating metal parts with complex architectures that cannot be produced by conventional manufacturing techniques. Thermal transport can be a focal point of unique AM products and is likewise important to metal AM processes. This dissertation investigates AM metal meshes with spa

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10

Lu, Hung-Wei. "Evaluation of Solubilization with Thermal Hydrolysis Process of Municipal Biosolids." Thesis, Virginia Tech, 2014. http://hdl.handle.net/10919/64914.

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The increased demand for advanced sludge stabilization in wastewater treatment facilities over the past decade has led to the implementation of various pretreatment techniques prior to anaerobic digestion. In an attempt to reduce sludge volumes and improve sludge conditioning properties, the use of thermal hydrolysis process before anaerobic digestion has been adopted with an increase in solids destruction, COD removal, and methane gas. In this study, the evaluation of thermal hydrolysis process as a viable pretreatment strategy to anaerobic digestion has been conducted in order to assess its

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11

Mericsko, Robert J. "Enhancements to atmospheric-correction techniques for multiple thermal images." Online version of thesis, 1992. http://hdl.handle.net/1850/10933.

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12

Barhemmati, Rajab Nastaran. "Thermal Transport Properties Enhancement of Phase Change Material by Using Boron Nitride Nanomaterials for Efficient Thermal Management." Thesis, University of North Texas, 2020. https://digital.library.unt.edu/ark:/67531/metadc1752408/.

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In this research thermal properties enhancement of phase change material (PCM) using boron nitride nanomaterials such as nanoparticles and nanotubes is studied through experimental measurements, finite element method (FEM) through COMSOL 5.3 package and molecular dynamics simulations via equilibrium molecular dynamics simulation (EMD) with the Materials and Process Simulations (MAPS 4.3). This study includes two sections: thermal properties enhancement of inorganic salt hydrate (CaCl2∙6H2O) as the phase change material by mixing boron nitride nanoparticles (BNNPs), and thermal properties enhan

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13

King, Andrew James Campbell. "Thermal enhancement strategies for fluid jets impinging on a heated surface." Curtin University of Technology, Dept. of Mechanical Engineering, 2007. http://espace.library.curtin.edu.au:80/R/?func=dbin-jump-full&object_id=17743.

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This research investigation examines the thermal behaviour of single and arrays of fluid jets impinging at heated surfaces, and formulates enhancement schemes for the jet impingement heat transfer processes for high-intensity cooling applications. The proposed techniques are numerically modelled and analysed over a wide parametric range to identify flow characteristics leading to thermal enhancement and optimum performance. The first scheme applies to a single fluid jet and incorporates a protruding object at the impingement surface to improve heat transfer. In this, a conical protrusion of hi

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14

Sachdeva, Parveen. "Molecular Dynamics Study of Thermal Conductivity Enhancement of Water Based Nanofluids." Doctoral diss., University of Central Florida, 2009. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/2158.

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A systematic investigation using molecular dynamics (MD) simulation involving particle volume fraction, size, wettability and system temperature is performed and the effect of these parameters on the thermal conductivity of water based nanofluids is discussed. Nanofluids are a colloidal suspension of 10 -100 nm particles in base fluid. In the last decade, significant research has been done in nanofluids, and thermal conductivity increases in double digits were reported in the literature. This anomalous increase in thermal conductivity cannot be explained by classical theories like Maxwell's mo

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15

Marques, Ana Catarina Almeida. "Novel design and performance enhancement of domestic refrigerators with thermal storage." Thesis, London South Bank University, 2012. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.631725.

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A growing global environmental awareness and the rising costs of energy are driving demand for the development of sustainable cooling technologies. Most governments worldwide have implemented minimum energy performance standards for household refrigerators and innovative new solutions are required to improve the efficiency of these appliances. This thesis investigated the design and operation of a thermal storage refrigerator. The aim was to improve the refrigerator energetic efficiency, temperature stability and extend its offcycle. The research demonstrated that larger displacement compresso

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King, Andrew. "Thermal enhancement strategies for fluid jets impinging on a heated surface." Thesis, Curtin University, 2007. http://hdl.handle.net/20.500.11937/815.

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This research investigation examines the thermal behaviour of single and arrays of fluid jets impinging at heated surfaces, and formulates enhancement schemes for the jet impingement heat transfer processes for high-intensity cooling applications. The proposed techniques are numerically modelled and analysed over a wide parametric range to identify flow characteristics leading to thermal enhancement and optimum performance. The first scheme applies to a single fluid jet and incorporates a protruding object at the impingement surface to improve heat transfer. In this, a conical protrusion of hi

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17

Sharma, Shivangi. "Performance enhancement of building-integrated concentrator photovoltaic system using phase change materials." Thesis, University of Exeter, 2017. http://hdl.handle.net/10871/33859.

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Building-integrated Concentrator Photovoltaic (BICPV) technology produces noiseless and pollution free electricity at the point of use. With a potential to contribute immensely to the increasing global need for a sustainable and low carbon energy, the primary challenges such as thermal management of the panels are overwhelming. Although significant progress has been made in the solar cell efficiency increase, the concentrator photovoltaic industry has still to go a long way before it becomes competitive and economically viable. Experiencing great losses in their electrical efficiencies at high

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18

Ozerinc, Sezer. "Heat Transfer Enhancement With Nanofluids." Master's thesis, METU, 2010. http://etd.lib.metu.edu.tr/upload/12611862/index.pdf.

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A nanofluid is the suspension of nanoparticles in a base fluid. Nanofluids are promising for heat transfer enhancement due to their high thermal conductivity. Presently, discrepancy exists in nanofluid thermal conductivity data in the literature, and enhancement mechanisms have not been fully understood yet. In the first part of this study, a literature review of nanofluid thermal conductivity is performed. Experimental studies are discussed through the effects of some parameters such as particle volume fraction, particle size, and temperature on conductivity. Enhancement mechanisms of conduct

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19

Richardson, William Charles. "Improving Post-Wildfire Seeding Success using Germination Modeling and Seed Enhancement Technologies." BYU ScholarsArchive, 2018. https://scholarsarchive.byu.edu/etd/6783.

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Arid and semi-arid rangelands are important ecosystems that are consistently degraded through disturbances such as wildfires. After such disturbances, the invasion and dominance of annual grasses, like cheatgrass (Bromus tectorum L.), can lead to an overall loss of ecosystem productivity and an increase in fire frequency. To reduce weed dominance, native and introduced perennials species are typically be seeded in the fall. High mortality is seen from these seeded plant communities due to germinated seed being exposed to freezing, drought, fungal pathogens, and other biotic and abiotic stresso

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20

Allan, James. "The development and characterisation of enhanced hybrid solar photovoltaic thermal systems." Thesis, Brunel University, 2015. http://bura.brunel.ac.uk/handle/2438/11624.

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A photovoltaic thermal solar collector (PVT) produces both heat and electricity from a single panel. PVT collectors produce more energy, for a given area, than conventional electricity and heat producing panels, which means they are a promising technology for applications with limited space, such as building integration. This work has been broken down into 3 subprojects focusing on the development of PVT technology. In the first subproject an experimental testing facility was constructed to characterise the performance of PVT collectors. The collectors under investigation were assembled by com

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21

Tetreault-Friend, Melanie. "Thermal-fluid characterization and performance enhancement of direct absorption molten salt solar receivers." Thesis, Massachusetts Institute of Technology, 2018. http://hdl.handle.net/1721.1/119037.

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Thesis: Ph. D., Massachusetts Institute of Technology, Department of Nuclear Science and Engineering, 2018.<br>This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.<br>Cataloged from student-submitted PDF version of thesis.<br>Includes bibliographical references (pages 155-160).<br>This thesis presents an in-depth thermal-fluid analysis of direct absorption molten salt solar receivers. In this receiver concept, an open tank of semi-transparent liquid is directly irradiated with concentrated sunlight, w

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22

Prabhat, Naveen. "Critical evaluation of anomalous thermal conductivity and convective heat transfer enhancement in nanofluids." Thesis, Massachusetts Institute of Technology, 2010. http://hdl.handle.net/1721.1/62707.

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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Nuclear Science and Engineering, 2010.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (p. 100-111).<br>While robust progress has been made towards the practical use of nanofluids, uncertainties remain concerning the fundamental effects of nanoparticles on key thermo-physical properties. Nanofluids have higher thermal conductivity and single-phase heat transfer coefficients than their base fluids. The possibility of very large thermal conductivity enhancement in nanofluids and the associated physical

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23

Pereira, Roger Michael. "The I2T5 : Enhancement of the Thermal Design of an Iodine Cold Gas Thruster." Thesis, Luleå tekniska universitet, Rymdteknik, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-80702.

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The I2T5, an iodine-propelled, cold gas thruster, developed by ThrustMe, France, is the first of its kind to make it successfully to space. Due to its simple, reliable and cost-effective design, it is a suitable propulsion system for CubeSat missions with low delta-V (ΔV) requirements. To ensure that the I2T5 performs at its peak, it is crucial to maintain good thermal control of the thruster, to keep it within the operational temperature range. The first flight measurements of the I2T5 provided insight into its thermal performance. It was observed that the required temperature to sublimate th

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24

Mahdi, Jasim M. "ENHANCEMENT OF PHASE CHANGE MATERIAL (PCM) THERMAL ENERGY STORAGE IN TRIPLEX-TUBE SYSTEMS." OpenSIUC, 2018. https://opensiuc.lib.siu.edu/dissertations/1533.

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The major challenge associated with renewable-energy systems especially solar, is the supply intermittency. One effective solution is to incorporate thermal energy storage components utilizing phase change materials (PCMs). These materials have the potential to store large amounts of energy in relatively small volumes and within nearly an isothermal storage process. The primary drawback of today’s PCMs is that their low thermal conductivity values critically limit their energy storage applications. Also, this grossly reduces the melting/ solidification rates, thus making the system response ti

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25

Martinez, Christian David. "Heat transfer enhancement of spray cooling with nanofluids." [Tampa, Fla] : University of South Florida, 2009. http://purl.fcla.edu/usf/dc/et/SFE0003237.

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26

Sharma, Mihir. "Design Approach for Thermal Performance Enhancements of a Pico‐Cell Base‐station Power Amplifier in Gallium Nitride HFET Technology." Thesis, Université d'Ottawa / University of Ottawa, 2014. http://hdl.handle.net/10393/31448.

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As newer and more powerful technologies emerge in the market, the desire for compactness and aesthetics drive designers to aggressive new heights. The trend of technology is quite simply to deliver high-speed designs that pack more power while seeing reduction in form factor for ease of use at the consumer level. This presents new challenges with reliability, cost, and ultimately what the consumer strives for: performance. It is inevitable for a small compact size device, such as a smartphone or wireless repeater, to face heating issues when packing large amounts of power. The goal of this

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27

Bansal, Aditya. "Alumina Nanofluid for Spray Cooling Heat Transfer Enhancement." Scholar Commons, 2007. http://scholarcommons.usf.edu/etd/3759.

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Nanofluids have been demonstrated to be promising for heat transfer enhancement in forced convection and boiling applications. The addition of carbon, copper, and other high-thermal-conductivity material nanoparticles to water, oil, ethylene glycol, and other fluids has been determined to increase the thermal conductivities of these fluids. The increased effective thermal conductivities of these fluids enhance their abilities to dissipate heat in such applications. The use of nanofluids for spray cooling is an extension of the application of nanofluids for enhancement of heat dissipation. In t

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Zhao, Weijun. "Angular variation of absorption and thermal emission enhancement from the two dimensional photonic crystals." [Ames, Iowa : Iowa State University], 2010. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:1475948.

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29

Lee, Jeong Woo. "Physical enhancement of transdermal drug delivery: polysaccharide dissolving microneedles and micro thermal skin ablation." Diss., Georgia Institute of Technology, 2009. http://hdl.handle.net/1853/33920.

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Transdermal drug delivery system has been limited to small and lipophilic drugs because skin has the intrinsic function to protect the body preventing entry of the external species into the body. In this thesis, two physical methods were studied to overcome the skin barrier in the controlled breakage of the skin barrier and to deliver macromolecules-based drugs through the skin; (1) polysaccharide dissolving microneedles and (2) micro thermal skin ablation. Polysaccharide dissolving microneedles system was designed to break the skin barrier in a minimized size with the mechanically poor materi

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Hussain, Atif. "Enhancement of hygrothermal properties of bio-based thermal insulation materials via sol-gel technology." Thesis, University of Bath, 2018. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.767569.

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This study involves the modification of a bio-based aggregate, hemp shiv, using functionalised silica-based coatings. This is the first time sol-gel technology is used in the treatment of hemp shiv to develop sustainable thermal insulation building materials with enhanced hygrothermal properties. Bio-based materials such as hemp shiv have a tendency to absorb large amounts of water due to their hydrophilic nature and highly porous structure. In contrast, the high porosity of hemp shiv provides excellent moisture buffering and thermal insulating properties. In this work, the hydrophilicity of t

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31

Stuart, Dale. "Heat Transfer Enhancement using Iron Oxide Nanoparticles." VCU Scholars Compass, 2012. http://scholarscompass.vcu.edu/etd/425.

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Two different iron oxide nanofluids were tested for heat transfer properties in industrial cooling systems. The nanofluids either had 30 nm particles with a wide size distribution to include particles greater than 1 micrometer or 15 nm particles with greater than 95% of the particles less than 33 nm. Calorimetry and thermal circuit modeling indicate that the 15 nm particle ferrofluid enhanced heat capacity. The smaller particle ferrofluid also demonstrated up to a 39% improvement in heat transfer, while the larger particle ferrofluid degraded the heat transfer performance. Particles from the l

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Lin, Weiwei, Kai Chen, Shufeng Zhang, and C. L. Chien. "Enhancement of Thermally Injected Spin Current through an Antiferromagnetic Insulator." AMER PHYSICAL SOC, 2016. http://hdl.handle.net/10150/614754.

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We report a large enhancement of thermally injected spin current in normal metal (NM)/antiferromagnet (AF)/yttrium iron garnet (YIG), where a thin AF insulating layer of NiO or CoO can enhance the spin current from YIG to a NM by up to a factor of 10. The spin current enhancement in NM/AF/YIG, with a pronounced maximum near the Neel temperature of the thin AF layer, has been found to scale linearly with the spin-mixing conductance at the NM/YIG interface for NM = 3d, 4d, and 5d metals. Calculations of spin current enhancement and spin mixing conductance are qualitatively consistent with the ex

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Ferrer, Muñoz Gerard. "Characterization, equation formulation and enhancement of phase change materials (PCM) for thermal energy storage (TES)." Doctoral thesis, Universitat de Lleida, 2016. http://hdl.handle.net/10803/399901.

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L’edificació, la indústria i el transport són els tres principals sectors consumidors d’energia, representant el 96 % de l’energia final consumida a la Unió Europea, i essent responsable de gairebé la totalitat de les emissions de CO2. El programa Horizon 2020 de la Comissió Europea expressa la necessitat de reduir el consum d’energia i les emissions d’efecte hivernacle en un 20 % per l’any 2020. L’emmagatzematge d’energia és un dels principals camps considerats i desenvolupats per reduir les emissions, doncs permet emparellar la demanda i el subministrament d’energia amb sistemes simples i ef

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Murthy, Sunil S. "Thin two-phase heat spreaders with boiling enhancement microstructures for thermal management of electronic systems." College Park, Md. : University of Maryland, 2004. http://hdl.handle.net/1903/179.

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Thesis (Ph. D.) -- University of Maryland, College Park, 2004.<br>Thesis research directed by: Mechanical Engineering. Title from t.p. of PDF. Includes bibliographical references. Published by UMI Dissertation Services, Ann Arbor, Mich. Also available in paper.

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Myers, Philip D. Jr. "Additives for Heat Transfer Enhancement in High Temperature Thermal Energy Storage Media: Selection and Characterization." Scholar Commons, 2015. http://scholarcommons.usf.edu/etd/5749.

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Inorganic salts are very promising as high-temperature heat transfer fluids and thermal storage media in solar thermal power production. The dual-tank molten salt storage system, for example, has been demonstrated to be effective for continuous operation in solar power tower plants. In this particular storage regime, however, much of the thermal storage potential of the salts is ignored. Most inorganic salts are characterized by high heats of fusion, so their use as phase-change materials (PCMs) allows for substantially higher energy storage density than their use as sensible heat storage alon

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Maidadi, Mohaman Bello. "Packed-bed rock thermal energy storage for concetrated solar power: enhancement of storage time and system efficiency." Thesis, Nelson Mandela Metropolitan University, 2013. http://hdl.handle.net/10948/d1020914.

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Solar thermal energy harvesting is a promising solution to offset the electricity demands of a growing population. The use of the technology is however still limited and this can most likely be attributed to the capital cost and also the intermittent nature of solar energy which requires incorporation of a storage system. To make the technology more attractive and effective, cheap means of harvesting solar energy and the development of efficient and inexpensive thermal energy storage devices will improve the performance of solar energy systems and the widespread use of solar energy. Heat stora

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Wang, Yichun. "LEAKAGE CURRENT REDUCTION OF MOS CAPACITOR INDUCED BY RAPID THERMAL PROCESSING." UKnowledge, 2010. http://uknowledge.uky.edu/gradschool_theses/640.

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With the MOSFET scaling practice, the performance of IC devices is improved tremendously as we experienced in the last decades. However, the small semiconductor devices also bring some drawbacks among which the high gate leakage current is becoming increasingly serious. This thesis work is focused on the of gate leakage current reduction in thin oxide semiconductor devices. The method being studied is the Phonon Energy Coupling Enhancement (PECE) effect induced by Rapid Thermal Processing (RTP). The basic MOS capacitors are used to check improvements of leakage current reduction after appropri

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Tian, Yuan. "Heat transfer enhancement in phase change materials (PCMs) by metal foams and cascaded thermal energy storage." Thesis, University of Warwick, 2012. http://wrap.warwick.ac.uk/55840/.

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Low heat transfer performance has been the main problem restricting the use of Phase Change Materials (PCMs) in situations requiring rapid energy release or storage. Three innovative solutions are studied in this Thesis to improve heat transfer in PCMs. These include combining PCMs with metal foams, Cascaded Thermal Energy Storage (CTES) and Metal Foam-enhanced Cascaded Thermal Energy Storage (MF-CTES). Heat conduction is investigated in Chapter 3, in which it was found that metal foams can improve heat conduction of PCMs by 5–20 times. Natural convection is investigated in Chapter 4, in which

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Maaza, Malik. "Latent and thermal energy storage enhancement of silver nanowires-nitrate molten salt for concentrated solar power." University of Western Cape, 2020. http://hdl.handle.net/11394/8038.

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>Magister Scientiae - MSc<br>Phase change material (PCM) through latent heat of molten salt, is a convincing way for thermal energy storage in CSP applications due to its high volume density. Molten salt, with (60% NaNO3 and 40% KNO3) has been used extensively for energy storage however; the low thermal conductivity and specific heat have limited its large implementation in solar applications. For that, molten salt with the additive of silver nanowires (AgNWs) was synthesized and characterized. This research project aims to investigate the thermophysical properties enhancement of nanosalt (Mix

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Werner, Tony Lee 1965. "A spice enhancement for the simulation and analysis of electro-thermal interactions on integrated circuit devices." Thesis, The University of Arizona, 1991. http://hdl.handle.net/10150/277863.

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Presently, the power generated by integrated circuit devices can produce significant temperature gradients across the surface of the substrate. The fluctuations to the device operating temperature alter model parameters and can adversely affect circuit operation. However, SPICE can only simulate an electrical circuit characterized by a single uniform temperature for all device elements. The following work describes TWSPICE which is an enhanced version of SPICE developed for electrical and thermal analysis. TWSPICE can accommodate individual operating temperatures for each of the resistor, diod

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Phua, Wilson Phua Yuen Zheng. "Performance Enhancement of Inclined Solar Chimney Power Plant Using Underneath Air-Vents and Thermal Storage Medium." Thesis, Curtin University, 2018. http://hdl.handle.net/20.500.11937/68293.

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Solar chimney power plant (SCPP) is a solar thermal energy conversion system which converts solar energy into thermal energy and indirectly to mechanical/electrical energy using air as the working fluid to drive a turbine-generator. The main challenge of SCPP is the plant’s low efficiency. This research focus on improving the SCPP collector’s efficiency through the use of underneath air-vents. The study revealed that the power output of the SCPP with air-vents improved by 60%.

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Maldonado, José Miguel. "Use of heat pipes in latent thermal energy storage systems." Doctoral thesis, Universitat de Lleida, 2021. http://hdl.handle.net/10803/671436.

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Els sistemes d'emmagatzematge energètic complementen a les energies renovables, solucionant el seu principal inconvenient, el desajust entre la producció d'energia i la demanda. Emmagatzemar energia tèrmica encaixa a la perfecció amb les plantes de concentració solar. Aquesta tesi doctoral centra els seus esforços en el desenvolupament d'un sistema d'emmagatzematge tèrmic latent, en un rang de temperatura entre els 210 ºC i els 270 ºC, donant suport a una planta de concentració solar tipus Fresnel. La tesi es divideix en dues parts: la primera és el disseny i construcció del mòdul d'emmagatzem

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Tam, Wai-Yin. "Enhancement of the Properties of Polymer by using Carbon Nanotubes." ScholarWorks@UNO, 2009. http://scholarworks.uno.edu/td/1105.

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The outstanding properties of carbon nanotubes (CNTs) have stimulated a large number of researches to explore the potential of using them as reinforcement in polymer composites. Although many studies have reported the enlighten improvement of the materials properties by using CNTs as reinforcement, there are no promising and optimal results have been concluded to date. This thesis aims at studying the mechanical properties on thermoset polymer, Epoxy, by employing a small amount of carbon nanotubes as reinforcement. Two different types of nanotube-based composites are prepared i.e. a raw

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Gowreesan, Vamadevan. "Rapid Infrared Thermal Processing of AA 2618 and AA 6061 Forgings." Ohio University / OhioLINK, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1225849023.

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Rosell, Olle. "Modelling and simulations for analysing thermal performance enhancement in air ducts with cold surface and hot air." Thesis, Karlstads universitet, Institutionen för ingenjörs- och kemivetenskaper, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-66677.

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The world today has large challenges in order to manage a changing climate and the consequences that the climate change has on the environment and human living standards. This climate change is largely affected by the emissions of greenhouse gases, which come from usage of fossil fuels. This is a global problem that will affect the whole world and cause an increase of mean global temperature, which would lead to drastically changes in the living environment for human beings. A large part of the use of fossil fuels is connected to electric energy production. In EU almost half of the electric en

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Kusumi, Koji. "Study on thermal mixing enhancement of liquid metal filn-f1ow under magnetic fields by using ｓubmerged vortex generators". Kyoto University, 2019. http://hdl.handle.net/2433/242502.

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Martin, Joshua. "Methods of thermoelectric enhancement in silicon-germanium alloy type I clathrates and in nanostructured lead chalcogenides." [Tampa, Fla] : University of South Florida, 2008. http://purl.fcla.edu/usf/dc/et/SFE0002448.

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Ahmed, Ahmed Qasim. "Modelling thermal comfort and energy saving enhancements in an office room served by stratified air distribution systems." Thesis, University of Leicester, 2017. http://hdl.handle.net/2381/40697.

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A numerical study is performed into the effects of the location of exhaust diffusers in relation to the room heat sources on thermal comfort and energy saving. A new concept of the combination of indoor heat sources and the exhaust outlet was also employed in this investigation. The results showed that the indoor thermal environment and energy saving were greatly improved by combining the exhaust outlets with some of the room’s heat sources. For further improvement, this concept was also used along with a novel local exhaust ventilation system in the modelled office room. This system was adopt

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Liu, Chun-Chen, and 劉俊成. "Thermal and Reliable Capability Enhancement In QFP Package." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/17223578263578581125.

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碩士<br>國立成功大學<br>工程科學系碩博士班<br>97<br>To follow the terminal market requirement, the function and efficiency demands of chips increase. This causes high density electronic packaging, which raises the heat dissipation. If the chip working temperature is over the design limit, it results in the function failure and the chip burnout. This trend will bring severe challenge to the packaging reliability and heat dissipation ability. In this work, the assembly structure includes Quad Flat Package (QFP) and an exposed type heat slug. Only the heat slug structure is modified and no other change is made in

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Yah, Fuoh Hsing, and 霍醒亞. "The Study of Thermal Enhancement by Impingememt Cooling." Thesis, 1993. http://ndltd.ncl.edu.tw/handle/69273851333115627812.

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