Cooling
Mostrando 13-24 de 1297 artigos, teses e dissertações.
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13. PHYSICAL AND THERMAL PROPERTIES OF EUCALYPTUS WOOD CHARCOAL.
ABSTRACT The knowledge of the physical and thermal properties of eucalyptus charcoal is of fundamental importance in the design of equipment and development of cooling technologies. However, literature about physical properties for eucalyptus wood charcoal is largely unavailable, especially the thermal and aerodynamic properties, for the same material. The a
CERNE. Publicado em: 2020-03
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14. 3D numerical investigation of mixture formation and combustion in a DISI engine at part-load under stratified operation
This work investigates through numerical simulation, the operation of a big bore direct fuel injection spark ignition engine, at part load under stratified operation. It evaluates fuel-air mixture preparation and combustion process with the adoption of detailed chemical kinetics mechanisms for both Isooctane and Ethanol, and applying adaptive mesh refinement
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2020
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15. Effect of Scanning Speed on the Surface Roughness of Laser Metal Deposited Copper on Titanium Alloy
This paper reports on the effect of scanning speed on the laser deposited Cu on titanium alloy substrate. The experiments were conducted by varying the scanning speed from 0.3 m/min to 1.2 m/min while the laser power, the powder feed rate and the gas flow rate were kept constant. The laser deposited Cu were characterized through the evolving microstructure a
Mat. Res.. Publicado em: 20/12/2019
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16. Efeito de dois sistemas de resfriamento sobre os hormônios tireoidianos e as variáveis termofisiológicas de matrizes suínas em lactação
RESUMO Avaliaram-se os efeitos do sistema de resfriamento evaporativo com pressão negativa (SRE) e aspersão de água sobre o telhado (AAT), as variáveis termofisiológicas, os hormônios tireoidianos e a relação neutrófilo:linfócito (N:L) em porcas. Utilizaram-se 61 fêmeas em lactação, que foram divididas nos dois ambientes térmicos, sendo 30 em S
Arq. Bras. Med. Vet. Zootec.. Publicado em: 13/12/2019
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17. Austenitic Grain Size Prediction in Hot Forging of a 20MnCr5 Steel by Numerical Simulation Using the JMAK Model for Industrial Applications
Yield strength and toughness in steels are directly associated with hot forging processes, especially by controlling austenitic grain size and cooling conditions. The phenomenological JMAK model in macroscale has been applied in different material classes to predict grain size after hot forming. However, on an industrial application, there is still a lack of
Mat. Res.. Publicado em: 05/12/2019
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18. The variability of the subantarctic front and the Southern Hemisphere atmospheric jet
Abstract The latitudinal variations of the Subantarctic Front (SAF) and Southern Hemisphere atmospheric jet were investigated for the period of 1993-2016. Zonal wind velocity, sea surface height and temperature data were used to identify these features over the South Atlantic, South Pacific and Indian Oceans individually. During this period, the atmospheric
Braz. j. oceanogr.. Publicado em: 02/12/2019
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19. Reproductive physiology of the heat-stressed dairy cow: implications for fertility and assisted reproduction
Abstract Heat stress causes a large decline in pregnancy success per insemination during warm times of the year. Improvements in fertility are possible by exploiting knowledge about how heat stress affects the reproductive process. The oocyte can be damaged by heat stress at the earliest stages of folliculogenesis and remains sensitive to heat stress in the
Anim. Reprod.. Publicado em: 28/11/2019
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20. Evaluation of the Heat and Energy Performance of a Datacenter Using a New Efficiency Index: Energy Usage Effectiveness Design – EUED.
Abstract Data Centers are growing steadily worldwide, and they are expected to continue growing up to 53% in 2020. Energy efficiency, in high power consumption, is a key venue. There are methodologies to measure this efficiency, one example is using the PUE (Power Usage Effectiveness) index. In this paper is proposed a new index for measuring efficiency at
Braz. arch. biol. technol.. Publicado em: 25/11/2019
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21. Concentration of soybean lecithin affects short-term storage success of goat semen related with seminal plasma removal
Abstract The objective of this study was to investigate the need of seminal plasma removal for short-term cooling of buck semen in soybean lecithin (SL) based extender. Each pool was divided equally, and one half was subjected to centrifugation to remove seminal plasma (SP-), while the other half remained with seminal plasma (SP+). Then, both SP+ and SP- sam
Anim. Reprod.. Publicado em: 25/11/2019
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22. Potencialidade de uso não potável de água de lagoa de detenção
RESUMO As águas de lagoas de detenção geralmente não são utilizadas produtivamente e o seu potencial é desperdiçado. Por estarem disseminadas nas cidades, a utilização dessas águas pode reduzir os custos com transporte de água, além de permitir a preservação de águas de melhor qualidade para fins mais nobres. Algumas das possíveis utilizaçõ
Eng. Sanit. Ambient.. Publicado em: 25/11/2019
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23. Factors Affecting Broiler Production: A Meta-Analysis
ABSTRACT The meta-analysis data were obtained from a survey of published articles over 15 years. The data were selected to classify the factors that impact broiler production and separated by influence aspects of animal production (thermal environment and other factors). The relevant data for each study were systematized, grouped and later tabulated and inse
Braz. J. Poult. Sci.. Publicado em: 25/11/2019
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24. Avaliação de desvio dimensional em Inconel 718 após a retificação em diferentes técnicas de lubri-refrigeração
RESUMO O Inconel 718 é uma liga à base de níquel que possui elevada resistência à fadiga e à fluência, ductilidade, rigidez, inércia química e capacidade de operar em elevadas temperaturas, por isto é bastante utilizada na fabricação de peças aeronáuticas de alto rendimento. Estas peças exigem tolerâncias dimensionais e geométricas estreitas
Matéria (Rio J.). Publicado em: 25/11/2019