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Dissertations / Theses on the topic 'Coolant. eng'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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1

Souza, José Vitor Cândido de. "Desenvolvimento de pastilhas cerâmicas à bases de Si3N4 para aplicações tribológicas /." Guaratinguetá : [s.n.], 2005. http://hdl.handle.net/11449/105366.

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Resumo: Nesse trabalho foram desenvolvidas três composições à base de Si3N4 com quantidades e tipos de aditivos diferentes, com objetivos de desenvolver cerâmicas densas de altas resistências, para posteriores testes como ferramentas de corte na usinagem de torneamento do ferro fundido cinzento, ferro fundido vermicular e a liga Ti-6Al-4V. As composições utilizaram aditivos Y2O3/Al2O3 (10%) e AlN/Y2O3 (15 e 20%), e foram sinterizadas pelo processo de sinterização normal. Em seguida foram caracterizadas quanto as propriedades físicas e mecânicas, apresentando bons resultados. Posteriormente a c

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2

Salani, Marcelo Re. "Estudo das propriedades mecânicas de aços microligados produzidos por laminação controlada seguida de resfriamento acelerado para tubos API/DNV usado no projeto pré-sal /." Guaratinguetá : [s.n.], 2011. http://hdl.handle.net/11449/94378.

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Orientador: Tomaz Manubu Hashimoto<br>Banca: Marcelo dos Santos Pereira<br>Banca: Cristina de Carvalho Ares Elisei<br>Resumo: Com os novos desafios impostos pelas condições cada vez mais severas dos poços de petróleo offshore a necessidade de materiais mais modernos e com melhores propriedades mecânicas tem sido um desafio constante. Neste trabalho foi realizada a caracterização mecânica de tubos fabricados a partir de chapas de aço laminadas a quente, seguido de resfriamento acelerado. Os valores reportados são resultados de testes de laboratório aplicados em corpos de prova retirados do meta

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3

Micallef, Christopher. "End winding cooling in electric machines." Thesis, University of Nottingham, 2006. http://eprints.nottingham.ac.uk/10260/.

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The fluid flow field and temperature distribution within the end region of a Totally Enclosed Fan Cooled (TEFC) induction motor have been investigated both experimentally and using Computational Fluid Dynamics (CFD) techniques, in order to improve the thermal performance. The flow field and the distribution of heat transfer coefficients over the end windings and internal surfaces (mainly frame and end shield) are characterised for a typical end region configuration. This is then used as a base case in order to investigate the impact configuration changes have on the fluid flow field and heat t

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Camargo, José Rui. "Sistemas de resfriamento evaporativo-adsortivo aplicados ao condicionamento de ar /." Guaratinguetá : [s.n.], 2003. http://hdl.handle.net/11449/106460.

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Orientador: Carlos Daniel Ebinuma<br>Banca: José Luz Silveira<br>Banca: José Nédilo Carrinho de Castro<br>Banca: Jeronimo dos Santos Travelho<br>Banca: Sebastião Cardoso<br>Resumo: O resfriamento evaporativo consiste na utilização da evaporação da água através da passagem de um fluxo de ar, provocando a redução na temperatura do ar e, apesar de utilizarem tecnologia relativamente simples, ainda são pouco utilizados para o condicionamento de ar em regiões de clima úmido. Este trabalho realiza um estudo dos potenciais e limitações de sistemas de condicionamento de ar por resfriamento evaporativo

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Mugglestone, Jonathan. "End region cooling in an electric motor." Thesis, University of Nottingham, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.263420.

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6

Massoni, Paulo Rogério. "Estudo numérico e experimental do resfriamento convectivo de vegetais cilíndricos /." Rio Claro : [s.n.], 2002. http://hdl.handle.net/11449/91949.

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Orientador: Jorge Roberto Pimentel<br>Banca: Marcos Antonio Sanches Vieira<br>Banca: Ricardo Egydio de Carvalho<br>Resumo: O resfriamento de produtos agrícolas, em ambientes com atmosfera controlada, é uma das técnicas que tem sido utilizada por produtores e indústrias do setor, sendo importante se ter informações sobre a influência de parâmetros que atuam durante o processo. Neste trabalho, foi desenvolvido um modelo numérico unidimensional usando-se um método explícito de aproximação das derivadas de equações diferenciais por diferenças finitas, para solucionar a equação da condução de calor

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7

Vicentin, Gilmar Cavalcante. "Portaferramentas para torneamento com refrigeração interna baseada na mudança de fase do fluido /." Bauru : [s.n.], 2010. http://hdl.handle.net/11449/96480.

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Orientador: Luiz Eduardo de Ângelo Sanchez<br>Banca: Vicente Luiz Scalon<br>Banca: Alisson Rocha Machado<br>Resumo: A crescente produtividade de aumento na produtividade em operações de usinagem toma cada vez mais importante o desenvolvimento de novas ferramentas de corte e novos métodos de manufatura, os quais devem ter a capacidade de preencher a demanda atual. Deste modo, muitos esforços têm sido direcionados para permitir a utilização de velocidade de corte cada vez maiores. Um grande desafio é controlar a temperatura durante o processo de usinagem, uma vez que a temperatura aumenta com o

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8

Silveira, Ronan Gobbi da. "Análise térmica de sistema de refrigeração direta em fermentadores cilindrocônicos /." Bauru : [s.n], 2009. http://hdl.handle.net/11449/91713.

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Orientador: Paulo César Razuk<br>Banca: Augusto Ronchi Junior<br>Banca: Waldemar Gastoni Venturini Filho<br>Resumo: A fermentação alcólica, processo central da indústria cervejeira é um processo que libera uma grande quantidade de calor. Sendo assim, os recipientes de fermentação devem estar equipados com instalações de refrigeração para o correto controle da temperatura. A presente pesquisa tem como objetivo a análise da troca de calor de fermentadores cilindrocônicos dotados de sistema de refrigeração direta através de serpentina meia-cana. Para a consecução desse objetivo foi necessária a e

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9

Salvadeo, Vitor Manoel. "Projeto e análise térmica de tanques de resfriamento de leite de cabra "in natura" para quatro ordenhas /." Bauru : [s.n.], 2009. http://hdl.handle.net/11449/91728.

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Orientador: Paulo César Razuk<br>Banca: Augusto Ronchi Junior<br>Banca: Waldemar Gastoni Venturini Filho<br>Resumo: O produtor de leite de cabra, com o apoio e incentivo de entidades governamentais, privadas e ONGs; agrega tecnologia ao leite garantindo uma melhor distribuição de renda e qualidade de vida, fixando-se cada vez mais no campo. O resfriamento do leite após a ordenha é a melhor medida para retardar a proliferação natural das bactérias e sua temperatura deverá ser reduzida de 36 ºC para 4 ºC no período máximo de 2 horas em cada ordenha. O tempo transcorrido entre a primeira ordenha

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10

Barbosa, Junior Ulisses. "Efeitos dos tratamentos térmicos de normalização, resfriamento rápido e alívio de tensões no aço ASTM A-516 grau 70, utilizado na fabricação de vasos de pressão /." Guaratinguetá : [s.n.], 2007. http://hdl.handle.net/11449/97097.

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Orientador: Marcelo dos Santos Pereira.<br>Banca: Tomaz Manabu Hashimoto.<br>Banca: José Rubens de Camargo.<br>Resumo: No Brasil, as chapas para aplicação em vasos de pressão são produzidas com tratamento térmico de normalização. Devido às exigências de garantias de propriedades mecânicas após tratamento pós-soldagem, há necessidade de se adicionar elementos de liga, que podem segregar-se no centro da chapa. Uma alternativa é produzir chapas de aço pelo processo de resfriamento acelerado (processo termomecânico), mas que requer elevado investimento em equipamentos para as usinas nacionais. O r

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Zamboni, Vinícius Tokunaga. "Correlação entre escores visuais de conformação e indicadores de desempenho, características de carcaça e de carne de novilhos Nelore e cruzados Aberdeen Angus x Nelore /." Araçatuba : [s.n.], 2010. http://hdl.handle.net/11449/94747.

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Orientador: Marcos Franke Pinto<br>Banca: Cecílio Viega Soares Filho<br>Banca: Antonio Fernando Bergamaschine<br>Resumo: O objetivo deste trabalho foi estudar o desempenho e as características de carcaça e da carne de bovinos de três grupos genéticos, utilizando 57 novilhos ½ sangue Nelore x Aberdeen Angus, 79 novilhos ¾ Nelore x ¼ Aberdeen Angus e 21 novilhos Nelore, mantidos no mesmo sistema de criação. Os animais foram pesados aos 120 e aos 205 dias (desmama), aos 12, 18 e 24 meses, e ao embarque para o abate. Além disso, na desmama, aos 18 e 24 meses, os animais foram avaliados individualm

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Sousa, Reginaldo Ribeiro de. "Análise numérica e experimental na determinação da potência térmica dissipada em componentes eletrônicos /." Ilha Solteira : [s.n.], 2008. http://hdl.handle.net/11449/94552.

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Orientador: Amarildo Tabone Paschoalini<br>Banca: Luiz de Paula do Nascimento<br>Banca: Marcelo Moreira Ganzarolli<br>Resumo: Os objetivos deste trabalho são determinar a potência térmica dissipada dos componentes eletrônicos de forma experimental e verificar a eficácia do método através de simulações numéricas computacionais utilizando o software comercial ANSYS. O Software ANSYS foi usado como ferramenta de Dinâmica de Fluidos Computacional neste trabalho. Para a realização deste trabalho um ensaio experimental foi executado a fim de obter alguns dados para o cálculo da potência térmica diss

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Varasquim, Francisco Mateus Faria de Almeida. "Otimização da retificação tangencial plana de compósitos plásticos reforçados com fibras de carbono /." Bauru : [s.n.], 2011. http://hdl.handle.net/11449/99734.

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Orientador: Eduardo Carlos Bianchi<br>Banca: Manoel Cleber de Sampaio Alves<br>Banca: Reginaldo Teixeira Coelho<br>O programa de Pós Graduação em Ciência e Tecnologia de Materiais PosMat, tem carater institucional e integra as atividades de pesquisa em materiais de diversos campi da Unesp<br>Resumo: Os materiais compósitos estão se tornando essenciais e amplamente utilizados na indústria moderna, principalmente nas indústrias aeronáuticas e aeroespacial. Essa notável demanda por este tipo de material, proveniente da junção entre dois ou mais materiais distintos, pode ser explicada pelo resulta

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Falleiros, Marcel Barbosa. "Avaliação comparativa do sêmen ovino refrigerado nos meios Glicina-Gema-Leite, Glicina-Gema purificada-Leite e Glicina-extrato de lipoproteínas de baxa densidade-Leite /." Botucatu : [s.n.], 2011. http://hdl.handle.net/11449/98149.

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Orientador: Sony Dimas Bicudo<br>Banca: Eunice Oba<br>Banca: Romildo Romualdo Weis<br>Resumo: Objetivou-se estudar os efeitos do extrato de lipoproteínas de baixa densidade sobre o sêmen ovino durante a refrigeração. Vinte amostras de 5 carneiros foram refrigeradas por 24 e 48 horas na geladeira para refrigeração Minitube, nos meios diluentes Glicina Gema Leite, Glicina Gema purificada Leite e Glicina Extrato Leite e submetidas a teste de exaustão (37ºC/240 minutos) sendo avaliados in vitro por meio das análises da cinética espermática computadorizada, da morfologia e da integridade da membran

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Tassini, Jussara Oliveira. "Eficiência energética em sistemas de refrigeração industrial : estudo de caso /." Guaratinguetá : [s.n.], 2012. http://hdl.handle.net/11449/99296.

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Resumo: Em alguns tipos de indústria, como por exemplo a de laticínios, bebidas e frigoríficos, o sistema de refrigeração é responsável por uma parcela significativa no consumo de energia elétrica. Tendo como objetivo a redução deste consumo, foi realizado um estudo de caso em uma indústria produtora de bebidas, sendo analisados todos os componentes do sistema de refrigeração. O sistema de refrigeração analisado utiliza amônia anidra (NH3) como fluido refrigerante no circuito principal e solução de etanol no circuito secundário, sendo composto por compressores do tipo parafuso, condensadores e

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16

Al-Samarrai, Ihsan. "Hybrid cooling/lubricating strategies for machining Ti-6Al-4V in CNC end milling." Thesis, University of Bath, 2018. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.767587.

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Titanium and its alloys are widely used in various engineering applications such as aerospace, biomedical and chemical industries due to their excellent combination of high strength-to weight ratio and good creep, corrosion and fracture resistance. However, these desirable design properties pose a serious challenge to the manufacturing engineers owing to the high temperatures and stresses generated during the machining of titanium alloys. The extremely low thermal conductivity of titanium alloys results in concentration of high temperature close to the tool cutting edge resulting in accelerate

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17

Sewall, Evan Andrew. "Development of a Thermal Management Methodology for a Front-End DPS Power Supply." Thesis, Virginia Tech, 2002. http://hdl.handle.net/10919/35488.

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Thermal management is a rapidly growing field in power electronics today. As power supply systems are designed with higher power density levels, keeping component temperatures within suitable ranges of their maximum operating limits becomes an increasingly challenging task. This project focuses on thermal management at the system level, using a 1.2 kW front-end power converter as a subject for case study. The establishment of a methodology for using the computer code I-deas to computationally simulate the thermal performance of component temperatures within the system was the primary goal.

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Simões, Rafael Plana. "Utilização de diferentes métodos de lubri-refrigeração na retificação cilíndrica externa de mergulho de cerâmica avançada com rebolo diamantado /." Bauru : [s.n.], 2012. http://hdl.handle.net/11449/99711.

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Orientador: Eduardo Carlos Bianchi<br>Coorientador: Paulo Roberto de Aguiar<br>Banca: Dayse Iara dos Santos<br>Banca: Roosevelt Droppa Junior<br>Banca: Leonardo Roberto da Silva<br>Banca: Jaime Gilberto Duduch<br>Resumo: Atualmente há por parte das empresas uma constante preocupação com a atualidade de seus sistemas produtivos, buscando a melhoria da eficiência dos processos respeitando as leis de preservação ambiental. Dentro desse contexto e considerando que o segmento das cerâmicas corresponde a aproximadamente 1% do PIB brasileiro, com perspectiva de crescimento, inúmeros estudos têm sido

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Al-Zurfi, Nabeel. "Large eddy simulation of cooling practices for improved film cooling performance of a gas turbine blade." Thesis, University of Manchester, 2017. https://www.research.manchester.ac.uk/portal/en/theses/large-eddy-simulation-of-cooling-practices-for-improved-film-cooling-performance-of-a-gas-turbine-blade(966b0252-4b0e-45de-9c1f-effe007261b0).html.

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The Large Eddy Simulation approach is employed to predict the flow physics and heat transfer characteristics of a film-cooling problem that is formed from the interaction of a coolant jet with a hot mainstream flow. The film-cooling technique is used to protect turbine blades from thermal failure, allowing the gas inlet temperature to be increased beyond the failure temperature of the turbine blade material in order to enhance the efficiency of gas turbine engines. A coolant fluid is injected into the hot mainstream through several rows of injection holes placed on the surface of a gas turbine

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Sharples, Joseph William. "Cooling rapidly and relaxing slowly with 4f ions." Thesis, University of Manchester, 2013. https://www.research.manchester.ac.uk/portal/en/theses/cooling-rapidly-and-relaxing-slowly-with-4f-ions(fab0aa0f-1ab7-4016-9d97-5edf6a629fa8).html.

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Anisotropic magnetic materials have been proposed over the past twenty years or so as candidates for high density storage, so-called Single-Molecule Magnets (SMMs). These may in future be used to store data at the level of an individual molecule. Separately, isotropic materials may be harnessed for their large magnetocaloric effect which enables them to be used as refrigerants. This can potentially replace the increasingly rare and therefore expensive 3He and 4He currently employed either separately or in 3He-4He dilution refrigerators. This thesis examines the use of lanthanide(III) ions for

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Mukahiwa, Kudzanai. "Microstructural characterisation of type 316 austenitic stainless steels : implications for corrosion fatigue behaviour in PWR primary coolant." Thesis, University of Manchester, 2017. https://www.research.manchester.ac.uk/portal/en/theses/microstructural-characterisation-of-type-316-austenitic-stainless-steels-implications-for-corrosion-fatigue-behaviour-in-pwr-primary-coolant(e8e04bc1-1413-4c59-bb04-7dd94bcbc78f).html.

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The environmentally-assisted fatigue crack growth behaviour of austenitic stainless steels in deoxygenated high temperature water at low strain rates has been reported to be greatly affected by the sulphur (S) content of the specimen, with high S specimens exhibiting significant reduced crack growth rates (retardation) when compared to low S specimens. To further the understanding of the mechanistic behaviour, fatigue crack growth experiments have been performed on high and low sulphur Type 316 austenitic stainless steel specimens tested in high temperature water and evaluated via microstructu

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Adegoke, C. O. "Evaluation of a refrigerant/absorbent combination for vapour absorption refrigeration systems utilising solar heat." Thesis, King's College London (University of London), 1987. https://kclpure.kcl.ac.uk/portal/en/theses/evaluation-of-a-refrigerantabsorbent-combination-for-vapour-absorption-refrigeration-systems-utilising-solar-heat(5c32f1a2-b5f9-41ba-b671-0bbb4fbcf578).html.

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Asim, Muhammad. "Simulation of solar powered absorption cooling system for buildings in Pakistan." Thesis, University of Manchester, 2016. https://www.research.manchester.ac.uk/portal/en/theses/simulation-of-solar-powered-absorption-cooling-system-for-buildings-in-pakistan(9f1a4400-fd4c-4ece-876f-98bb1aed5404).html.

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This research investigates the potential of a solar powered cooling system for single family houses in Pakistan. The system comprises water heating evacuated tube solar collectors, a hot water storage tank, and an absorption chiller. A literature review was carried out covering: • Energy situation, climate, and renewable energy potential in Pakistan; • Energy and thermal comfort in buildings, particularly for hot climates; • Solar collectors and solar cooling systems, particularly for hot climates; • Dynamic thermal simulation and weather data for solar energy systems and buildings. It was fou

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Johnston, Nicola. "The effects of whole body cooling following traumatic brain injury." Thesis, University of Manchester, 2011. https://www.research.manchester.ac.uk/portal/en/theses/the-effects-of-whole-body-cooling-following-traumatic-brain-injury(d09fa495-9cf6-45e0-930c-7db49ce55c76).html.

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Introduction: Prevention of secondary brain injury is key in the management of severe traumatic brain injury in intensive care. A raised temperature post traumatic brain injury is considered by many to be a potential insult, although the evidence from animal and human studies is ambiguous. Due to lack of evidence for induced hypothermia, the aim of current clinical temperature management following severe traumatic brain injury is often the 'middle ground' or maintained normothermia. In our intensive care unit a step wise cooling protocol is initiated in the event of a rise in temperature. Prel

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Osman, Medhat. "Evaluating and enhancing design for natural ventilation in walk-up public housing blocks in the Egyptian desert climatic design region." Thesis, University of Dundee, 2011. https://discovery.dundee.ac.uk/en/studentTheses/5f07394c-7eb6-4fac-8469-ecea3233dc34.

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This work is concerned with evaluating and studying the possibilities of enhancing natural ventilation performance and its use as a passive cooling strategy in walk-up public housing blocks within the Egyptian desert climatic region. This research attempts to maximize the benefits from the vast investments made in housing projects in Egypt through providing thermally comfortable housing prototypes that could use by contrast less energy for cooling purposes. This is considered essential in the light of the current concerns about energy all over the world. Egypt was devided to seven different cl

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Raphael, Iain. "Cooling hot property? : an assessment of the impact of property marking on residential burglary crime reduction, crime displacement or diffusion of benefits and public confidence." Thesis, University of Portsmouth, 2015. https://researchportal.port.ac.uk/portal/en/theses/cooling-hot-property(f5a6e97a-bdf6-4722-adcd-1119a57c6b7f).html.

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For the year ending March 2014 the Office for National Statistics (ONS) estimated there were 573,000 domestic burglaries in England and Wales. Using the Home Office Integrated Offender Management Value for Money Toolkit valuation (2011) the cost to society of this is £1.9 billion. The financial and resulting emotional cost is a heavy burden for the UK. Better understanding crime prevention approaches and their impact on reducing residential burglary is of obvious relevance to policing, government and society as a whole. This study examined the wider impact of traceable liquid property marking

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Maley, Matthew. "The effect of ethnicity on the vascular responses to cooling in men." Thesis, University of Portsmouth, 2015. https://researchportal.port.ac.uk/portal/en/theses/the-effect-of-ethnicity-on-the-vascular-responses-to-cooling-in-men(ab29422f-49a0-4136-aa4c-7ca1875212a2).html.

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Non-freezing cold injury (NFCI) is caused by protracted skin cooling above the freezing point of tissue and up to ~15 °C which predominantly afflicts the extremity skin sites owing to their enhanced vasoconstrictor response to cooling. This cold injury may cause long term symptoms, possibly debilitating an individual for their lifetime. Whilst pain and excessive sweating of the injured skin site are common features, some individuals may appear asymptomatic until they are exposed to cold where they may experience an augmented vasoconstrictor response and rewarm slower than those without NFCI, t

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de, Oliveira Mónica Sandra Abrantes. "The use of air assisted atomised water spray systems for controlled cooling of high temperature forgings." Thesis, University of South Wales, 1999. https://pure.southwales.ac.uk/en/studentthesis/the-use-of-air-assisted-atomised-water-spray-systems-for-controlled-cooling-of-high-temperature-forgings(46c7cbe3-4bc5-443a-b9ea-de43af504fcc).html.

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This thesis describes the work undertaken by the author in collaboration with Wyman-Gordon Forgings, USA, to assist in the development of a cooling system,based on air assisted atomised water sprays primarily for the quenching of aerospace components from high temperatures. The mechanical properties of forgings used in aircraft engines depend on the rate of cooling from the heat treatment solution temperature. It is well known that water quenching produces high cooling rate. Although, the severity of the quench can sometimes produce unacceptable distortion and high residual stresses in the com

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Ahmed, Mohamed. "Inhibition of mild steel corrosion in cooling systems by low- and non-toxic corrosion inhibitors." Thesis, University of Manchester, 2017. https://www.research.manchester.ac.uk/portal/en/theses/inhibition-of-mild-steel-corrosion-in-cooling-systems-by-low-and-nontoxic-corrosion-inhibitors(7dc2367d-7352-4ab2-85b1-39b09d6487d8).html.

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The aim of the research in this thesis was to study how environmentally friendly corrosion inhibitors for cooling water systems might be developed and used. Firstly, reduced toxicity inorganic corrosion inhibitors (i.e. nitrite/molybdate) were considered. Secondly, non-toxic inhibitors based on mono and di-basic salts of carboxylic acids were studied systematically as a function of carbon chain length. For nitrite inhibitor alone, a concentration of 7 mM NaNO2 was effective to inhibit carbon steel in chloride media of 10 mM NaCl, while 10 mM nitrite was needed in sulphate media of 3.66 mM Na2S

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Elsawaf, Sherif Ahmed Elkarim Ibrahim Soliman. "Robustness of connections to concrete-filled steel tubular columns under fire during heating and cooling." Thesis, University of Manchester, 2012. https://www.research.manchester.ac.uk/portal/en/theses/robustness-of-connections-to-concretefilled-steel-tubular-columns-under-fire-during-heating-and-cooling(b1ef6849-2d59-4e73-b0c9-c57d0293ec51).html.

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Joint behaviour in fire is currently one of the most important topics of research in structural fire resistance. The collapse of World Trade Center buildings and the results of the Cardington full-scale eight storey steel framed building fire tests in the UK have demonstrated that steel joints are particularly vulnerable during the heating and cooling phases of fire. The main purpose of this research is to develop robust joints to CFT columns that are capable of providing very high rotational and tying resistances to make it possible for the connected beam to fully develop catenary action duri

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Al-Aabidy, Qahtan. "Modelling of turbulent flow and heat transfer in porous media for gas turbine blade cooling." Thesis, University of Manchester, 2018. https://www.research.manchester.ac.uk/portal/en/theses/modelling-of-turbulent-flow-and-heat-transfer-in-porous-media-for-gas-turbine-blade-cooling(f7781d8e-bb1e-4bb7-a57e-4e77875ad6d6).html.

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This thesis focuses on the study of flow and heat transfer in porous media in both laminar and turbulent flow regimes, by using Volume Averaged Reynolds Navier Stokes (VARNS) approach. The main concern is to investigate the possibility of using porous media for the gas turbine blade cooling. Very recently, using this technique in blade cooling, particularly with internal cooling, has motivated many researchers due to an effective enhancement in the blade cooling. In this study turbulence is represented by using the Launder-Sharma low-Reynolds-number k-Îμ turbulence model, which is modified vi

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Rahman, Mohammad. "Effects of species and rooting conditions on the growth and cooling performance of urban trees." Thesis, University of Manchester, 2013. https://www.research.manchester.ac.uk/portal/en/theses/effects-of-species-and-rooting-conditions-on-the-growth-and-cooling-performance-of-urban-trees(1211fb4b-2eb9-4ddc-99e1-c1ee37fccc03).html.

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The urban heat island (UHI) is a problem that is likely to be exacerbated by ongoing climate change, but it is often claimed that urban trees can mitigate it and hence adapt our cities to climate change. Many researchers have attempted to quantify the cooling effects of trees using modelling approaches. However, the major disadvantage of most of the models is that they consider all vegetation to act as a single saturated layer and that their effect is merely proportional to its surface cover. Therefore, they fail to take into account potential differences between tree species and the effect of

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Nguyen, Chi-Toan. "Microstructure changes during fast beta cycles of zirconium alloys." Thesis, University of Manchester, 2018. https://www.research.manchester.ac.uk/portal/en/theses/microstructure-changes-during-fast-beta-cycles-of-zirconium-alloys(f8812f2b-21d3-420d-a9f7-d5be72bcccb5).html.

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During loss-of-coolant accidents (LOCA) and reactivity-initiated accidents (RIA), nuclear fuel rods experience high heating rates that change the microstructure and properties of zirconium cladding materials, which are in forms of stress-relieved, like cold-worked (CW) or recrystallised (RX) microstructure. The present study aimed to determine how different fast heating rates and starting microstructures affect the kinetics of phase transformation, the transformation textures and eventually the mechanical response in the dual-phase region. The LOCA/RIA cycles from heating at 8 to 100C/s to alp

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MELO, Cibele Cavalcanti Souza de. "Avaliação da eficácia dos diluidores tris ou água de coco em pó (ACP-106®), associado à Aloe vera (Aloe barbadensis Miller), na conservação de sêmen canino." Universidade Federal Rural de Pernambuco, 2015. http://www.tede2.ufrpe.br:8080/tede2/handle/tede2/4694.

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Submitted by (edna.saturno@ufrpe.br) on 2016-06-13T13:41:47Z No. of bitstreams: 1 Cibele Cavalcanti Souza de Melo.pdf: 1262965 bytes, checksum: a0b751f71b7ca0dbc7f0a215b3c2b60f (MD5)<br>Made available in DSpace on 2016-06-13T13:41:47Z (GMT). No. of bitstreams: 1 Cibele Cavalcanti Souza de Melo.pdf: 1262965 bytes, checksum: a0b751f71b7ca0dbc7f0a215b3c2b60f (MD5) Previous issue date: 2015-02-27<br>Conselho Nacional de Pesquisa e Desenvolvimento Científico e Tecnológico - CNPq<br>The aim was to evaluate the effect of the Aloe vera gel (Aloe barbadensis Miller), in association with the Tri

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Jiang, Zhengyi. "Design, development and testing of an automated system for measuring wall thicknesses in turbine blades with cooling channels." Thesis, University of Manchester, 2016. https://www.research.manchester.ac.uk/portal/en/theses/design-development-and-testing-of-an-automated-system-for-measuring-wall-thicknesses-in-turbine-blades-with-cooling-channels(895ac153-e310-40e2-87c6-4e40654c9d5d).html.

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Cooling channels are designed in blades to protect the blades from damage at high temperature in a gas turbine. ELE Advanced Technology Ltd. is a UK company specialised in machining cooling channels in turbine blades using electro-chemical techniques. The wall thicknesses between these cooling channels and the surface of the turbine blade influences the performance of cooling channels and are required to be accurately machined and then inspected. At present, the company measures the wall thicknesses using a hand-held contact ultrasonic probe, which is time-consuming and not very accurate. In t

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Murad, Khan Hayder Mirza Majeed. "Modelling and thermal optimization of traditional housing in a hot arid area." Thesis, University of Manchester, 2015. https://www.research.manchester.ac.uk/portal/en/theses/modelling-and-thermal-optimization-of-traditional-housing-in-a-hot-arid-area(b02bccf8-8902-42ec-868f-a0d78fdaae07).html.

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This thesis studies the use of night ventilation as a passive cooling strategy for a traditional courtyard house in a hot dry climate. This was done by CFD simulation of the house and its surroundings, using weather data for Baghdad. The simulation was done for a large number of scenarios in which each represented a change in one of the house elements, such as courtyard and room dimensions, and in some cases included modern technologies such as a ceiling fan. The thesis suggests that performance should be calculated with the aid of a "Night Time Effectiveness Ratio" (NTER) and time constants.

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Kanan, Safwan. "Modelling of a solar pond as a combined heat source and store to drive an absorption cooling system for a building in Iraq." Thesis, University of Manchester, 2017. https://www.research.manchester.ac.uk/portal/en/theses/modelling-of-a-solar-pond-as-a-combined-heat-source-and-store-to-drive-an-absorption-cooling-system-for-a-building-in-iraq(1d356a21-e8ab-4491-9ebb-3be2caf0f092).html.

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This research studies the performance of a salinity gradient solar pond driving an absorption cooling system, as an alternative to a conventional electrically powered cooling system, to provide cool air for a modern single family house in the hot dry climate of Baghdad, Iraq. The system comprises a salinity gradient solar pond, a hot-water-fired absorption water chiller, a chilled-water cooling coil which cools the air in the house, and a cooling tower which rejects heat to the ambient air. Hot brine from the pond circulates through a heat exchanger, where it heats water that is then pumped to

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Al, Sofyani Sharaf. "Analytical Modeling and Experimental Analysis of Metalworking Fluids in theMilling Process." University of Toledo / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1494853268000644.

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Chen, Yiqiang. "High-resolution microstructural and microanalysis studies to better understand the thermodynamics and diffusion kinetics in an advanced Ni-based superalloy RR1000." Thesis, University of Manchester, 2015. https://www.research.manchester.ac.uk/portal/en/theses/highresolution-microstructural-and-microanalysis-studies-to-better-understand-the-thermodynamics-and-diffusion-kinetics-in-an-advanced-nibased-superalloy-rr1000(1d4e96e0-b362-484e-82cb-bec18cab850b).html.

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The commercial polycrystalline superalloy RR1000 developed for turbine disc applications contains a large number of alloying elements. This complex alloy chemistry is required in order to produce appropriate microstructures and the required mechanical properties, such that the most important strengthener γʹ displays complex alloy chemistry. The broad aim of this project is to develop an approach to measuring the composition of γʹ precipitates at a broad range of length scales from nanometres to hundreds of nanometres, and subsequently develop a better understanding of the role of thermodynamic

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Antonysamy, Alphons Anandaraj. "Microstructure, texture and mechanical property evolution during additive manufacturing of Ti6Al4V alloy for aerospace applications." Thesis, University of Manchester, 2012. https://www.research.manchester.ac.uk/portal/en/theses/microstructure-texture-and-mechanical-property-evolution-during-additive-manufacturing-of-ti6al4v-alloy-for-aerospace-applications(03c4d403-822a-4bfd-a0f8-ef49eb65e7a0).html.

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Additive Manufacturing (AM) is an innovative manufacturing process which offers near-net shape fabrication of complex components, directly from CAD models, without dies or substantial machining, resulting in a reduction in lead-time, waste, and cost. For example, the buy-to-fly ratio for a titanium component machined from forged billet is typically 10-20:1 compared to 5-7:1 when manufactured by AM. However, the production rates for most AM processes are relatively slow and AM is consequently largely of interest to the aerospace, automotive and biomedical industries. In addition, the solidifica

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Pic, Axel. "Numerical and experimental investigations of self-heating phenomena in 3D Hybrid Bonding imaging technologies." Thesis, Lyon, 2019. http://www.theses.fr/2019LYSEI054.

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Dans cette thèse, les phénomènes d’auto-échauffement ont été étudié pour guider la conception de circuits intégrés 3D de nouvelle génération. Grâce à des études expérimentales et numériques, la dissipation thermique dans des imageurs 3D par collage hybride a été analysée et l’impact de l’augmentation de température résultante a été évalué. Premièrement, afin de développer des modèles précis, les propriétés thermiques des matériaux utilisés dans les circuits intégrés ont dû être déterminées. Différents films minces diélectriques impliquant des oxydes, des nitrures et des composés low-k ont été

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Chen, Yi-Sung, and 陳苡菘. "The Design of an Automatic Body Temperature Regulator Using Thermoelectric Cooling Module and EMG Signal." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/69c85v.

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碩士<br>輔仁大學<br>電機工程學系碩士在職專班<br>107<br>This thesis proposed a bidirectional DC to DC converter based on soft switching technology, and then uses the detected EMG (Electromyography) signal to know the action status as the control battery charging or discharging. When discharge mode, the power is supplied to the thermoelectric cooling chip on the user to start cooling or heating mechanism to adjust the body temperature. When Charging mode, an external power supply can be directly used to charging battery or uses the chip to generate electricity if there is enough temperature difference. The bidire

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WU, CHUN FU, and 吳俊甫. "Study of Dynamic-cooling and Freeze-drying Process on the Morphology of Conjugated Polymers/PCBM Blends Containing End-functionalized Polymers." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/68621481865653931762.

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碩士<br>輔仁大學<br>化學系<br>104<br>Low band gap copolymers have been widely used in the photoactive layer of high performance polymer solar cells. However, most low band gap copolymers are not crystallizable because of different monomers used in the polymer backbones. On the other hand, the thermal stability of low band gap copolymers with PCBM is relative poor which leads to phase separation between low band gap copolymers and PCBM. PCBM forms large size domains and reduces efficiency of exciton dissociation. A dynamic-cooling and freeze-drying process (DCFD) is applied to the fabrication of photoac

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Hung, Chia-Yin, and 洪嘉吟. "Exploring the cooling capability of self-rewetting fluid deposited on the cold end of a copper strip with horizontal temperature gradient." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/9xmnz8.

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碩士<br>國立臺灣大學<br>機械工程學研究所<br>107<br>This study aims at applying the inverse Marangoni convection to cooling augmentation of a super-hydrophilic copper strip with a horizontal temperature gradient. The self-rewetting fluid used herein is the 0.2%wt 1-heptanol dilute aqueous solution and there are two different supplied quantity: 1 ml and 1.5 ml. The horizontal temperature gradient is varied by adjusting the inlet temperature of coolant and the initial temperature of the hot end. We find that the inverse Marangoni convection is able to cool the hot end effectively and result in higher accumulated

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Hsu, He-Yin, and 許熇尹. "Study on the Achievement of Time-Dependent Temperature Profile Required for Dieless Drawing a Stainless Rod to Form an End Geometry by Cooling Control System." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/jvjumw.

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碩士<br>國立中興大學<br>機械工程學系所<br>107<br>Stainless steel screws and nails are used in the decoration, auto-mation and automobile industry mostly. However, the traditional pro-cess has to use the mold for metal end processing, which causes in-creasing costs and environmental pollution. Apply dieless drawing method to the stainless steel end geometry process would reduce envi-ronmental pollution and cost, due to the dieless drawing method has low material consumption and low environmental pollution. The rela-tionship between time-dependency temperature profile and metal end geometry was set up by labor

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MIRANDOVÁ, Růžena. "Zdroje rizika chladících zařízení s amoniakem a jejich případné havarijní dopady." Master's thesis, 2010. http://www.nusl.cz/ntk/nusl-54164.

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I have decided to deal with the issue of "Risk Sources of Ammonia Cooling Systems and Their Eventual Accidental Impacts" as the risk of leakage from the cooling systems using ammonia as a coolant still prevails these days. Eventual accidental leakage simulation models were applied to several winter stadiums using ammonia as a coolant. Based on these results, it has been assessed how dangerous these sources for the citizens living in their surroundings are and measures to increase safety were suggested, too.

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