Heat Pump
Mostrando 13-24 de 50 artigos, teses e dissertações.
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13. Effect of induction heating on steel seamless tubes used in diesel enginers / Efeito do aquecimento por indução eletromagnetica de tubos sem costura utilizados em motores a diesel
This paper presents a study about the effect of cold upsetting and electromagnetic induction heating on microstructure and hardness characteristics of steel seamles pipe. This pipe studied is applied in fuel flow transport of high pressure fuel system. As fuel is transported the pipe sealing characteristic is critical on assembly interfaces of this pipe. Thi
Publicado em: 2009
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14. Estudo de tratamento de interface proveniente de polidutos
The São Paulo Brasília Pipeline (OSBRA), owed by PETROBRAS, starts at the Planalto Refinery (REPLAN) and supplies gasoline, Diesel oil and liquefied petroleum gas (LPG) to the mid-west region of Brazil. The pipeline is 786 kilometers long with diameter of 20 inches in its first segment and 178 kilometers with 12 inches of diameter in the second. The fuels
Publicado em: 2009
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15. Desenvolvimento de um sistema de bomba de calor agua/agua para resfriammento e secagem de tomates / Development of a system for heat pump water/water for cooling and drying of tomatoes
O tomate destinado tanto ao consumo de mesa, in natura, quanto à produção industrial, é uma hortaliça consumida o ano inteiro, sendo o Brasil um grande produtor, nas regiões Centro Sul e em algumas regiões do Nordeste e Sul do país. Mas as perdas pós-colheita superam 50 % durante o processo de colheita e de pós-colheita. Estas perdas são principal
Publicado em: 2008
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16. Exergetic and economic analysis of an industrial distillation column
In this work, applications of exergy and economic concepts to compression, heat exchange, and separation processes were used for calculation of the irreversibility rate, thermodynamic efficiency, and internal rate of return (IRR) of the profitability. A case study based on a real process, the purification of 1,2-dichloroethane (DCE) in a high-purity distilla
Brazilian Journal of Chemical Engineering. Publicado em: 2007-09
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17. Modelagem do escoamento monofásico em bomba centrífuga submersa operando com fluidos viscosos / On the influence of viscosity upon electrical submersible pumping performance
In the oil industry, when artificial lift using Electrical Submersible Pumps (ESP) is considered, there is a need to determine their performance for displacing oils of medium to high viscosity. This work proposes a model that is able to predict the performance of conventional centrifugal pumps and ESPs when pumping heavier oils (meaning oils of high viscosit
Publicado em: 2007
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18. Análise de sistemas de secagem de café utilizando-se bomba de calor e gás liqüefeito de petróleo - GLP / Analysis of systems of coffee drying being used heat pump and liquefied gas of petroleum - LGP
Objetivou-se com este trabalho analisar a secagem de café cereja descascado e desmucilado em secador de café em lotes intermitentes de fluxos concorrentes, utilizando uma bomba de calor para condicionar o ar de secagem. Na avaliação da viabilidade técnica e do custo operacional deste sistema, fez-se um estudo comparativo com o sistema de secagem para ca
Publicado em: 2007
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19. In vitro Candida spp adhesion on acrylic resins and denture liners / Avaliação in vitro da adesão de Candida spp sobre a superficie de resinas acrilicas para base e reembasamento de protese removiveis
Candida-associated stomatitis is reported in up to 67% of a population wearing dentures. Recently, disease-associated Candida species have shifted from C. albicans to norralbicans species. Since factors such as presence of saliva and oral bacteria appear to play a major role in the initial phases of yeasts adhesion, this study aimed to determine whether thes
Publicado em: 2006
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20. Diagnosis and evaluation of fungi presence in the air of two different ventilation sytems for broiler houses
Intensive broiler production in tropical climates requires adequate air circulation to control heat stress. Excess of air speed may lead to dust production and reduction of air quality and, consequently, production parameters. Brazilian regulations prohibit the presence of pathogens that may deteriorate air quality, and the presence of fungi in the air insid
Revista Brasileira de Ciência Avícola. Publicado em: 2005-12
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21. ANÁLISE DE UM SISTEMA DE PRODUÇÃO SIMULTÂNEA DE ELETRICIDADE, FRIO E CALOR / ANALYSIS OF A SYSTEM FOR THE SIMULTANEOUS PRODUCTION OF ELECTRICAL ENERGY, HEAT AND COLD
The simultaneous production of electric energy, heat and cooling capacity from the primary fuel burning on a heat engine (trigeneration) can emerge as a promising strategy, from the energy and project points of view, mostly, in food and chemistry industries. The present work describes the experimental study of a vapor compression system for chilled water pro
Publicado em: 2005
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22. Desenvolvimento de uma bomba de calor agua-agua acionada a biogas para utilização em processos de aquecimento e resfriamento em sistemas de produção de leite / Development of a water-to-water heat pump worked with biogas for using in process of heating and cooling in milk production systems
A geração de energia térmica é de grande importância na agroindústria de laticínios para conservação e qualidade do leite. Como a energia elétrica é a fonte principal utilizada para geração de energia térmica, o setor leiteiro enfrenta atualmente, dois problemas: um relacionado ao custo da energia elétrica, onerando a produção; o outro, rela
Publicado em: 2005
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23. Manufacturing of metallic porous structures to be used in capillary pumping systems
Sintered metallic porous structures have an application as capillary structures in two-phase heat transfer loops. In this work the manufacturing procedure of tubular porous structures for capillary pump application is discussed. The application of porous structures on capillary pumping systems requires porosity higher than 40% and pore size diameter lower th
Materials Research. Publicado em: 2003-12
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24. Simulação computacional de eventos termo-hidraulicos transitorios em multicircuitos com multibombas
PANTERA-2 (from Programa para Análise Termo-hidráulica de Reatores a ÁguaProgram for Thermal-hydraulic Analysis of Water Reactors, Version 2), whose fundamentals are described in this work, is intended to carry out rod bundle subchannel analysis in conjunction with multiloop simulation. It solves simultaneously the conservation equations of mass, axial an
Publicado em: 2003