Adiabatic Cooling
Mostrando 1-11 de 11 artigos, teses e dissertações.
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1. PERFORMANCE AND WELFARE OF FINISHING PIGS SUBJECTED TO CLIMATECONTROLLED ENVIRONMENTS AND SUPPLEMENTARY LIGHTING
ABSTRACT An adequate thermal environment in pig farming facilities is essential to ensure productivity and animal welfare. The objective of this study was to evaluate the behavior and performance of finishing pigs, subjected to climate-controlled environments and supplementary lighting. Twenty-seven pigs (3/4 Duroc, 1/4 Pietrain) were kept in pens with no cl
Eng. Agríc.. Publicado em: 2020-06
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2. 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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3. Análise da influência de variáveis operacionais de um sistema de trigeração sobre o desempenho termodinâmico e a distribuição das utilidades / Analysis of operational variables in a trigeneration system and their influence over thermodynamic performance and distribution of utilities
In this work a trigeneration system, simultaneous production of power, heat and cooling using only one energy source, was analyzed, aiming at a better energetic efficiency of the system, showing the influence of some operating variables of the process on the utilities generated and the efficiency of the overall system. In this study the influence of the comp
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 20/04/2012
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4. Desenvolvimento de um sistema de purificação de água com bomba de calor / Development of a water purification system with heat pump
The simplest process for water to reach adequate purity is the conventional distillation, however this method has drawbacks such as their high expense with electric energy and their high water consumption. Searching alternatives to produce purified water with saving energy and water cooling, but with production as purity as conventional, there is the possibi
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 06/05/2011
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5. Conjugate Cooling of a Discrete Heater in Laminar Channel Flow
Electronic components are usually assembled on printed circuit boards cooled by forced airflow. When the spacing between the boards is small, there is no room to employ a heat sink on critical components. Under these conditions, the components’ thermal control may depend on the conductive path from the heater to the board in addition to the direct convecti
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2011-09
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6. Convective cooling of three discrete heat sources in channel flow
A numerical investigation was performed to evaluate distinct convective heat transfer coefficients for three discrete strip heat sources flush mounted to a wall of a parallel plates channel. Uniform heat flux was considered along each heat source, but the remaining channel surfaces were assumed adiabatic. A laminar airflow with constant properties was forced
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2008-09
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7. Resfriamento evaporativo: estudo do potencial de sua aplicação no Brasil / Evaporative cooling: study of the potential of her application in Brazil
O objetivo deste trabalho é a validação de um método matemático que será utilizado para o mapeamento das regiões brasileiras com potencialidade de utilizar sistemas de resfriamento evaporativo no condicionamento de ambientes. O resfriador evaporativo ensaiado apresenta capacidade para condicionamento de um ambiente de até 50 m2. São sobrepostos mapa
Publicado em: 2006
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8. Effects of the adiabatic evaporative cooling system in free-stall on the production, physiological, behavior on the occurrence of mastitis in dairy cows. / Efeitos do sistema de resfriamento adiabático evaporativo em free-stall sobre a produção, fisiologia, comportamento e ocorrência de mastite em vacas em lactação.
The purpose of this research was to compare the efficiency of three different schedule for using an adiabatic evaporative cooling with misting system (AEC) in a free-stall and its influence on the occurrence of clinical and sub clinical mastitis, as well as, on the physiological and milk production parameters on lactating cows. A total of 28 Brown Swiss and
Publicado em: 2005
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9. Modeling, simulation, and optimization of a front-end system for acetylene hydrogenation reactors
The modeling, simulation, and dynamic optimization of an industrial reaction system for acetylene hydrogenation are discussed in the present work. The process consists of three adiabatic fixed-bed reactors, in series, with interstage cooling. These reactors are located after the compression and the caustic scrubbing sections of an ethylene plant, characteriz
Brazilian Journal of Chemical Engineering. Publicado em: 2004-12
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10. Eficiência do sistema de resfriamento adiabático evaporativo em confinamento do tipo freestall para vacas em lactação. / Efficiency of the adiabatic evaporative cooling system in freestall for dairy cows.
This first work aimed to evaluate the effect of sprinkling frequency of adiabatic evaporative cooling system within feed line of a freestall in relation to temperature and humidity index (THI) and black globe temperature index (BGHI) and physiological responses in dairy cows. Data were registered during 116 days from January to May 2003. Twelve multiparous d
Publicado em: 2004
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11. Analise numerica do escoamento convectivo entre placas verticais
The numerical modeling of the laminar convective flow between vertical plates was carried out in order to obtain the solution of the elliptical equations describing the problem. Experimental results obtained in the literature were used to verif the accuracy of the method. Eventually, study cases were considered for situations of interest in cooling of eletro
Publicado em: 1992