Refrigeration Cycle
Mostrando 13-24 de 29 artigos, teses e dissertações.
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13. ValidaÃÃo experimental de um resfriador de Ãgua operando em ciclo de adsorÃÃo com aquecimento solar indireto / Experimental validation of a water cooler operating in cycle of adsorÃÃo with indirect solar heating
Apresenta a validaÃÃo experimental de um novo refrigerador solar por adsorÃÃo com aquecimento indireto. Os componentes do refrigerador sÃo: adsorvedor, condensador, evaporador e coletor solar. A escolha do par adsorbato / adsorvente, Ãgua e sÃlica gel tipo RD, respectivamente, levou em consideraÃÃo as temperaturas alcanÃadas pelos coletores e dispo
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 29/05/2009
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14. Thermodynamic and heat transfer analysis for design of a absorption refrigeration system for applications at low temperatures using natural gas. / Análise termodinâmica e de transferência de calor para dimensionamento de um sistema de refrigeração por absorção para aplicações em baixas temperaturas usando gás natural
The absorption refrigeration cycle studied in this work it uses as working fluid a mixture of water and ammonia and it is fed by thermal energy provided by direct burning of the natural gas. The objective is to produce cold in low temperatures for applications in the conservation of foods in general, especially in areas less favored by the electric net, as t
Publicado em: 2009
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15. Exergetic analysis of cascade cycle for natural gas liquefaction / Analise exergetica de um ciclo em cascata para liquefação de gas natural
O comércio de gás natural liquefeito apresenta um crescente interesse por parte tanto de países exportadores como dependentes desta fonte energética. Apesar de o transporte por gasoduto ser muito menos suscetível a perdas, ele se torna inviável a longas distâncias ou a demandas variáveis. A liquefação do gás natural também proporciona o armazenam
Publicado em: 2008
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16. Estudo de confiabilidade de compressores alternativos semi-herméticos de sistemas de refrigeração. / Reliability study of reciprocating compressors of refrigeration systems.
Refrigeration systems are reparable systems. This means that one can perform maintenance actions on them several times during the system life cycle. The most common refrigeration system is the vapor compression cycle. In this cycle, the compressor is the most complex and expensive component. So, the user should take special care because , beside problems lik
Publicado em: 2007
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17. Projeto e simulação de resfriadores de líquidos. / Chillers design and simulation.
In the last decade, the world passed trough an important transformation. The raise in the number of companies and globalization obligated the industry to increase production and quality to be competitive. This scene turns clear the importance of researches in the industrial refrigeration area. The cooling systems allow reduction in the manufacture time cycle
Publicado em: 2007
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18. Large eddy simulation applied to reciprocating compressors
This paper considers the application of large-eddy simulation (LES) to predict the performance of hermetic reciprocating compressors utilized in refrigeration. In such devices the pressure difference between the suction/discharge chamber and the cylinder, established by the piston motion, is responsible for the valve opening. Once the valves are open, the fl
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2006-06
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19. The pequi fruit (Caryocar brasiliense Camb.): vital cycle and aggregation of value for the minimal processing / Ciclo vital e agregaÃÃo de valores ao pequi
The species Caryocar brasiliense Camb. is very common in the region which composes the Cerrado (savanna-like vegetation), known popularly as pequi. It plays an important role in the life of the inhabitants in that region, whether economically with its sale in natura or even for its consumption. The purpose of this work was the characterization of the pequi a
Publicado em: 2005
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20. Avaliação de um sistema de refrigeração por adsorção para produção de gelo, operando diferentes tipos de ciclo com baixas temperaturas de geração. / Evaluation of a system of refrigeration for adsorção for ice production, operating different types of cycle with low temperatures of generation.
The goal of this project was to design and built a prototype of an adsorption refrigeration system for ice production with cycle operation flexibility. The prototype was to be powered by different energy sources. To reach this goal, the properties and characteristics of some adsorbents and adsorbates were compared and ammonia was chosen as adsorbate and carb
Publicado em: 2004
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21. Comparação do desempenho de um sistema de refrigeração para resfriamento de liquido, controlado a diferentes modos de controle. / Comparison of the system performancefor liquid refrigeration, controlled cooling the different ways of control.
A prototype of refrigeration system in a chiller plant was assembled and instrumented for development of a conventional and fuzzy controllers. Fuzzy controls are increasingly being applied to industrial process especially in process with complex mathematical modeling. The capacity of action in a system controlled by a fuzzy logic is based only on a expert kn
Publicado em: 2003
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22. EXPERIMENTAL ANALYSIS OF AN ABSORPTION REFRIGERATION CYCLE OPERATING IN TRANSIENT CONDITIONS / ANÁLISE EXPERIMENTAL DE UM CICLO DE REFRIGERAÇÃO POR ABSORÇÃO OPERANDO EM REGIME TRANSIENTE
The present work is related to an experimental analysis of an absorption refrigeration cycle operating in transient regime, leading to the study of the techcnical feasibilty for the application of absorption refrigeration cycles in automotive air conditioning systems. In such system, waste heat from the exhaust or cooling systems acts as the heat source for
Publicado em: 2002
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23. EVALUATION OF THE GAS LOAD INFLUENCE ON AN AUTOMOTIVE AIR CONDITIONING SYSTEM / AVALIAÇÃO DA INFLUÊNCIA DA CARGA DE GÁS EM UM SISTEMA DE CONDICIONAMENTO DE AR AUTOMOTIVO
The modern automotive technology reaches considerable progress`s in the mechanical aspect as in the functional, with these technological advances, the biggest progress was made in the structure of the automobiles and in the air conditioning systems. Considering the importance of the use of refrigerant, the present work is developed, because the refrigerant g
Publicado em: 2002
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24. Tecnicas de modelagem, simulação e otimização de processos de refrigeração e de congelamento
In this work the modelling, the simulation and the optimisation of a refrigeration system applied to food freezing processes are developed. The study is divided in two stages: the first part tries to identify the typical thermodynamic behaviour of a refrigeration plant, together with the development of a methodology for simulation and for a thermoeconomic op
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 10/02/2000