Water Cooling Tower
Mostrando 1-12 de 29 artigos, teses e dissertações.
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1. Avaliação de um sistema industrial de resfriamento de água. / Evaluation of an industrial system of cooling water.
Neste trabalho, foi estudado o desempenho de um sistema constituído de torres de resfriamento e a sua integração em uma planta industrial de hidrogenação de butadieno. Caracterizou-se o desempenho das torres de resfriamento com base em um modelo fenomenológico, cujos parâmetros foram obtidos a partir da medição de variáveis operacionais reais. O pr
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 19/03/2012
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2. Aproveitamento de membranas de osmose inversa descartadas da indústria para o reuso da purga de torres de resfriamento
Reverse osmosis plants use new membranes to produce demineralized water. After a period of three to five years, the membranes are replaced by news ones due to levels of treatment which are not suitable for production of water with the desired characteristics. This process generates a lot of rejected modules causing an environmental problem. The present work
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2012
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3. Proposta e comparação de um modelo fenomenológico com base em alto transporte de massa e supersaturação para torre de resfriamento de água. / Presentation and comparison of a model based in high mass transfer and supersaturation in a cooling water tower.
Cooling towers are equipment widely used in industrial plants, where these operate under severe conditions such as cooling water inlet temperatures above 50oC. Under this condition, there are high evaporation of water and high mass transfer, generally not considered in performance analysis of a cooling tower. This work presents and analyzes the differences b
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 20/12/2011
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4. Modelagem fenomenológica do desempenho de torres de resfriamento de água acopladas e estudo de casos. / Phenomenological modeling of performance of coupled water cooling towers and case studies.
Neste trabalho foi realizada a modelagem fenomenológica do desempenho de uma torre de resfriamento de água e de um sistema de duas torres de resfriamento em série, com temperatura de água de entrada de até 65 ºC. Verificou-se a validade do modelo através de comparação dos resultados previstos com os obtidos em ensaios em uma unidade piloto. Em segui
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 03/06/2011
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5. APPICATION OF FUZZY LOGIC IN CONTROL THE CRYSTALLIZATION OF AN ABSORPTION REFRIGERATION SYSTEM WITH PAIR WATER LITHIUM BROMIDE / Aplicação da lógica fuzzy no controle da cristalização de um sistema de refrigeração por absorção com par brometo de lítio
This work presents theoretical and experimental study of a system of control for a steam generator. This system was developed to control the crystallization of a cooling system for absorption. The control system maintains the pressure generator above the zone of crystallization of diagram temperature pressure-saturated solution concentration of LiBr-water. T
Publicado em: 2010
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6. AnÃlise da utilizaÃÃo de gargalos e fios de garrada pet como enchimento de torres de resfriamento
In some industrial processes, as well as in air conditioning processes, there is the need for cooling of equipments that generate heat during his operation. Usually, the fluid utilized to dissipate that generated heat is the water, due to its physical characteristics (high heat capacity, low viscosity, high thermal conductivity and high density). Besides its
Publicado em: 2009
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7. UtilizaÃÃo de materiais alternativos como Enchimento de Torres de Resfriamento
This work studies the behavior of alternative materials as packing for cooling towers. The following materials had been evaluated: vegetal sponge ( Luffa Cylindrica), coconut ( Cocos nucifera Linnaeus) fiber, curlers for hair and necks of PET bottles. In order to investigate the performance of those materials, a prototype of a cooling tower with forced circu
Publicado em: 2006
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8. Simulação de sistemas de climatização combinada à simulação higrotérmica de edificações
Due to the nonexistence of a building simulation program that can simulate in details the combined heat, vapor and liquid transfer in porous elements and the HVAC systems, a generic and flexible computational algorithm has been elaborated in order to integrate models for both HVAC systems and multizone building models. In that algorithm, mathematical models
Publicado em: 2006
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9. Estudo experimental de um controle adaptativo para um sistema de refrigeração / Experimental study of a refrigeration system using an adaptative control
This research deals with a experimental study of vapor compression refrigeration system, with variable speed compressor using adaptative fuzzy control, comparing its results with On-Off and PI control. The experimental equipment used is composed of a semi-hermetic compressor, concentric tube evaporator and condenser, thermostatic expansion valve with manual
Publicado em: 2006
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10. Estudo experimental de um controle adaptativo para um sistema de refrigeraÃÃo / Experimental study of a refrigeration system using an adaptative control
This research deals with a experimental study of vapor compression refrigeration system, with variable speed compressor using adaptative fuzzy control, comparing itâs results with On-Off and PI control. The experimental equipment used is composed of a semi-hermetic compressor, concentric tube evaporator and condenser, thermostatic expansion valve with manua
Publicado em: 2006
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11. Operational cost minimization in cooling water systems
In this work, an optimization model that considers thermal and hydraulic interactions is developed for a cooling water system. It is a closed loop consisting of a cooling tower unit, circulation pump, blower and heat exchanger-pipe network. Aside from process disturbances, climatic fluctuations are considered. Model constraints include relations concerning t
Brazilian Journal of Chemical Engineering. Publicado em: 2000-12
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12. Detection of Legionella spp. in cooling tower water by the polymerase chain reaction method.
The presence of Legionella spp. in cooling tower water was investigated by using the polymerase chain reaction. Total Legionella spp. detection was performed with 20-mer 5S rRNA complementary DNA sequence primers, and specific Legionella pneumophila detection was performed with 20-mer and then 21-mer macrophage infectivity potentiator gene sequence primers.