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Dissertations / Theses on the topic 'Effective heat capacity method'

Author: Grafiati

Published: 4 June 2021

Last updated: 7 February 2022

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1

Fedorko, Tomáš. "Řešení přenosu tepla tuhnoucí ocelové soustavy se změnou fáze při pohybujících se okrajových podmínkách." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2019. http://www.nusl.cz/ntk/nusl-400426.

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Cílem diplomové práce je vytvoření 2D numerického modelu pohybujícího se řezu s proměnnými okrajovými podmínkami skutečné geometrie plynulého odlévání a chlazení předlitku v prostředí MATLAB. Model se zabývá vysoce nelineárními termofyzikálními podmínkami oceli během tuhnutí a chlazení. V práci je simulovaná nejen nelinearita termofyzikálních podmínek, ale také nelinearita při fázové změně. Fázová změna je modelovaná pomocí metody entalpie, metody zdánlivé kapacity a metody teplotního zotavení. Všechny výsledky práce jsou porovnány z více hledisek, jako např. z hlediska přesnosti, rychlosti vý

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2

Zálešák, Martin. "Optimalizace návrhu solárního kolektoru využívající latentní teplo fázové přeměny." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2018. http://www.nusl.cz/ntk/nusl-382272.

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The thesis deals with the creation for a numerical model of a solar collector with a phase change material as a heat storage medium. The model was implemented in Python. Using the created model, design optimization of several problems was carried out with the use of selected methods of heuristic optimization. The results of the behaviour of the created model and of design optimization were then analysed and evaluated.

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3

Siqueira, Géssica Lacerda. "Solução do problema de mudança de fase através do método dos elementos finitos." Universidade Federal de Juiz de Fora (UFJF), 2017. https://repositorio.ufjf.br/jspui/handle/ufjf/5955.

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Submitted by Renata Lopes (renatasil82@gmail.com) on 2017-11-07T12:20:00Z No. of bitstreams: 1 gessicalacerdasiqueira.pdf: 2914379 bytes, checksum: 13b701ceac7f6562db4c0a3167e60c32 (MD5)<br>Approved for entry into archive by Adriana Oliveira (adriana.oliveira@ufjf.edu.br) on 2017-11-09T14:37:17Z (GMT) No. of bitstreams: 1 gessicalacerdasiqueira.pdf: 2914379 bytes, checksum: 13b701ceac7f6562db4c0a3167e60c32 (MD5)<br>Made available in DSpace on 2017-11-09T14:37:17Z (GMT). No. of bitstreams: 1 gessicalacerdasiqueira.pdf: 2914379 bytes, checksum: 13b701ceac7f6562db4c0a3167e60c32 (MD5) Previous i

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4

Fernando, W. Primal D. "Experimental Investigation of Refrigerant Charge Minimisation of a Small Capacity Heat Pump." Doctoral thesis, Stockholm : Kungliga Tekniska högskolan, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-4273.

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5

Wood, Sandra Jean. "Determination of effective thermal conductivity of media surrounding underground transmission cables." Thesis, Georgia Institute of Technology, 1993. http://hdl.handle.net/1853/17390.

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6

Babaee, Koochaksaraee Sima, and Sara Ghahremanpour. "Using Design of Experiments in Validation of a new calorimetric method for the specific heat capacity determination." Thesis, Högskolan i Borås, Institutionen Ingenjörshögskolan, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:hb:diva-19555.

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Total Quality Management as a holistic management system is widely practical inevery organization these days and one of the foundations of TQM which should betaken into account in all functions of the company is continuous improvement.Customer satisfaction is an important topic in which continuous improvement play akey role and leads to enhance it. Therefore, it is very worthwhile for the organizationto define the designing new products/methods based on recent and future customerneeds as one of its main activities.Generally, during the development and before launching a new product/method,vali

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7

Zhao, Xing. "CURIE TEMPERATURE MEASUREMENT OF FERROMAGNETIC NANOPARTICLES BY USING CALORIMETRY." Wright State University / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=wright1421085560.

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8

Průša, David. "Identifikace tepelné vodivosti a tepelné kapacity stavebních látek metodou „Hot Wire Method“." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2019. http://www.nusl.cz/ntk/nusl-392340.

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This aim of task deals with study of heat dissipation mechanisms and the description of physical phenomena, which is accompanied by non-stationary measurement of thermal characteristics by the method "hot-wire method". In particular, we observe the coefficient of thermal conductivity and its dependence on various variables such as the temperature of the measured sample, its moisture state, the volume of the sample and its porosity. The above mentioned findings are used for the invention of the measuring device of a nonstationary gauge, which is based on regular heating and is dedicated to meas

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9

Musella, Manuela. "Development and test of a method for the simultaneous measurement of heat capacity and thermal diffusivity by laser-flash technique at very high temperatures : application to uranium dioxide." Thesis, University of Warwick, 1999. http://wrap.warwick.ac.uk/2831/.

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The "classical" laser-flash method is today the most used technique to measure the thermal diffusivity of a wide range of materials. This work describes the development of a new technique, based on the laser-flash method, which measures simultaneously on the same sample with an absolute method the thermal diffusivity and the specific heat, and its application to a number of high melting-point refractory materials. In this work, a new data processing procedure, which takes radiative and conductive heat losses into consideration, is introduced, and the thermal diffusivity, a, and specific heat,

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10

Lowry, Bonita Kristine. "Zinnia Growth and Water Use Efficiency in a Rate Study of Coconut Coir Pith and Sphagnum Peat Moss in Container Growing Substrates." The Ohio State University, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=osu1419244167.

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11

Warnock, Teresa Georgeanne. "School System Improvement through Building Leadership, Adult Learning, and Capacity: A Consideration of Instructional Rounds as a Systemic Improvement Practice." Thesis, University of North Texas, 2017. https://digital.library.unt.edu/ark:/67531/metadc1062801/.

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The problem of the study was determining the supportive conditions related to instructional rounds (rounds) to understand better what conditions may allow for sustained systemic improvement over time. Three Texas school districts were studied to understand the perceptions of district leaders, principals, teacher leaders, and teachers with regard to the sustainability of instructional rounds as a systemic improvement practice, the supportive conditions necessary for sustainability, the salient characteristics that differentiated rounds from other improvement practices, and the potential of rou

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12

Gondre, Damien. "Numerical modeling and analysis of heat and mass transfers in an adsorption heat storage tank : Influences of material properties, operating conditions and system design on storage performances." Thesis, Lyon, 2016. http://www.theses.fr/2016LYSEI022/document.

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Le développement de solutions de stockage de l'énergie est un défi majeur pour permettre la transition énergétique d'un mix énergétique fortement carboné vers une part plus importante des énergies renouvelables. La nécessité de stocker de l'énergie vient de la dissociation, spatiale et temporelle, entre la source et la demande d'énergie. Stocker de l'énergie répond à deux besoins principaux : disposer d'énergie à l'endroit et au moment où on en a besoin. La consommation de chaleur à basse température (pour le chauffage des logements et des bureaux) représente une part importante de la consomma

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13

Faye, Mactar. "Structure interne et propriétés thermiques macroscopiques, application aux matériaux de construction." Thesis, Toulouse 3, 2016. http://www.theses.fr/2016TOU30032/document.

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L'objectif de cette thèse est d'étudier l'impact de la structure interne des matériaux isotropes granulaires sur leurs propriétés thermiques macroscopiques. Nous avons développé un code de calcul pour résoudre les transferts thermiques au sein d'un matériau hétérogène tridimensionnel. Ce code est couplé avec un algorithme de génération de structures aléatoires. Après validation expérimentale, nous avons généré des géométries granulaires dont nous avons caractérisé la structure interne, puis nous avons étudié l'impact de cette structure sur la conductivité thermique. Nous avons également dévelo

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14

Bukvová, Veronika. "Studium tepelných poměrů a vhodných materiálů pro konstrukci energetického zásobníku pro dlouhodobé ukládání energie v podmínkách klimatu ČR." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2018. http://www.nusl.cz/ntk/nusl-371872.

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Presented work deals with appropriate ways of storing thermal energy and selection of materials for a high capacity storage unit. The thesis describes technologies currently used for long-term storage of thermal energy, the structural arrangement of the thermal unit, physical properties of the materials usable for construction of high-temperature storage units and the utilization of these materials. The thesis also describes the measuring procedure of the material characteristics and the method of evaluation. Size of the solar collector and the required volume of the storage for heat supplying

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15

Qian, Junwei. "Développement du modèle E-PPR78 pour prédire les équilibres de phases et les grandeurs de mélange de systèmes complexes d’intérêt pétrolier sur de larges gammes de températures et de pressions." Thesis, Vandoeuvre-les-Nancy, INPL, 2011. http://www.theses.fr/2011INPL105N/document.

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Nous avons développé un modèle prédictif, utilisant le principe de contribution de groupes, pour prédire avec précision, le comportement des fluides pétroliers. Ce modèle baptisé PPR78 utilise l’équation d’état de Peng et Robinson et des règles de mélange de type Van der Waals avec un coefficient d’interaction binaire kij, dépendant de la température. De telles règles de mélange sont équivalentes à celles obtenues en combinant à compacité constante une fonction d’excès de type Van Laar et une équation d’état cubique.La première partie de cette étude a consisté à étendre le domaine d’applicatio

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16

Fang, Chen Yihui. "Modélisation thermique des moteurs asynchrones en vue de la réalisation d'un outil CAO." Rouen, 1994. http://www.theses.fr/1994ROUE5077.

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Une modélisation thermique d'un moteur asynchrone fermé est effectuée dans la présente étude à l'aide d'un logiciel de calcul en éléments finis appelé Systus. Le modèle conçu en 3D représente une configuration assez complexe du moteur. Le coefficient d'échange dans les enceintes du moteur est un paramètre non accessible comme il est reconnu dans la littérature scientifique. De ce fait, un modèle de mélange parfait de l'écoulement dans les enceintes est avancé afin d'identifier le coefficient d'échange. Ce traitement est original et efficace. Grâce à la performance du logiciel Systus, les condu

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17

Luzio, André Alves Martins. "Análise comparativa de diferentes métodos para a modelação numérica do comportamento de materiais de mudança de fase (PCMs) microencapsulados." Master's thesis, 2018. http://hdl.handle.net/10316/86056.

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Dissertação de Mestrado Integrado em Engenharia Mecânica apresentada à Faculdade de Ciências e Tecnologia<br>Os PCMs são materiais que fundem/solidificam a uma temperatura aproximadamente constante, armazenando/restituindo grandes quantidades de calor devido ao calor latente envolvido nos processos de mudança de fase. Deste modo, os PCMs podem ser aplicados no armazenamento de energia térmica e na termorregulação de diferentes sistemas. A modelação do comportamento dos PCMs apresenta vários desafios, nomeadamente a existência de uma fronteira móvel durante a mudança de fase, e das não linearid

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18

Yang, Kai-Chun, and 楊凱鈞. "The Study of Effective Thermal Resistance, Its Sensitivity Analysis, and Heat Transfer Improvements in High-Capacity Dry-Storage System." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/26552789815536825256.

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碩士<br>國立清華大學<br>工程與系統科學系<br>98<br>This thesis investigated three-dimensional steady state thermal analysis of the High Capacity Dry Storage System (HCDSS) developed by INER. As our first step, we looked into the sensitivity analysis of thermal conductivities of various materials used in HCDSS. We determined the effective thermal resistances for main components in the system analytically. During the transfer cask mode (TFR), the major contributors of thermal resistances are from sleeves group, supporter, the air gap between transportable Storage Canister (TSC) and transfer cask, and neutron shi

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19

Chaaban, Mohamed. "A finite element calculation method for the heat transfer effects on the current-carrying capacity of underground electrical cables." Thesis, 1995. http://spectrum.library.concordia.ca/94/1/NN01281.pdf.

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This thesis presents a combined numerical and experimental study of the heat transfer modes that take place in cavities embedded within solid bodies. The motivation is to develop a practical numerical approach to quantify the role of various regions in the global heat dissipation around underground electrical cable installations, used in electricity transmission and distribution. A detailed numerical solution of the complex heat transfer present; conduction, free convection and radiation, with unknown boundary values at the air-solid interfaces, is first developed. For the convective flows in

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20

Smith, Carol Elaine. "A method for determining the installed capacity of an underfloor electrical resistance heating and energy storage system." 1985. http://hdl.handle.net/2097/27546.

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21

Liu, Yau-chia, and 劉曜嘉. "Analysis of GaAs Crystal Growth by Using Modified Effective Specific Heat Method and Interfacial Extra Node Scheme with Modified Furnace Wall Temperature." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/47813151091108218521.

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博士<br>國立成功大學<br>工程科學系碩博士班<br>95<br>This work is to develop a new mathematical model to simulate the crystal growth in a Bridgman furnace. The relationship among the flow, temperature, concentration fields, the released latent heat and the curved solid/liquid interface was investigated. In this paper, the numerical scheme is the finite different method. The SIMPLEC algorithm is used to solve the flow field. The effective specific heat method is modified to handle the release of latent heat. Adding extra nodes at the interface is proposed to deal with the solute release at the solid/liquid inter

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22

Hwang, Jih Shang, and 黃智賢. "A new method for heat capacity measurement by fitting the whole temperature response of a heat-pulse calorimeter, and an indexing algorithm considering spurious peaks for X-ray powder diffraction." Thesis, 1997. http://ndltd.ncl.edu.tw/handle/27223775470154183419.

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博士<br>國立成功大學<br>物理學系<br>85<br>This thesis mainly consists of three parts. In the first part, a new method that fits the wholetemperature response of a heat-pulse calorimeter for heat capacity is described. Analyzing the thermal response of a heat-pulse calorimeter on a model that wasused by the relaxation method, the authors derived some useful relations and further utilized the numeric method of the general linear least squares to determine the heat capacity of a sample. Absolute accur

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