Thermal Energy Efficiency
Mostrando 1-12 de 119 artigos, teses e dissertações.
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1. Numerical simulations of ceramic firing in catenary kilns
Abstract Kiln geometries were developed to reach homogeneous temperatures above 900 °C, during the firing process, aiming to improve the production process of the ceramists from Vale do Jequitinhonha (MG/Brazil). Techniques of reactive flow numerical solution using the software Ansys CFX have been used to foresee the behavior of the firings. Two types of ca
Cerâmica. Publicado em: 2022
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2. Study using a CFD approach of the efficiency of a roof ventilation closure system in a multi-tunnel greenhouse for nighttime microclimate optimization
ABSTRACT The thermal efficiency of naturally ventilated greenhouses is limited due to the permanent exchange of air through the vents, especially during the night hours. The objective of the work consisted in evaluating a system of inflatable air ducts that close the roof vents during the night as a strategy to reduce the energy loss during these hours. For
Rev. Ceres. Publicado em: 2020-10
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3. INTERFERENCE OF THE NUMBER OF REMOTE CONTROL VALVES IN USE ON THE ENERGY PERFORMANCE OF AN AGRICULTURAL TRACTOR WITH PRODUCTIVITY MANAGEMENT
ABSTRACT The hydraulic remote control system allows the transfer of energy from the engine through a flow of hydraulic oil to engines and implements pulled by agricultural tractors, which can interfere with its energy and operational performance. This study aimed to evaluate the interference of the number of remote control valves in use on the operational an
Eng. Agríc.. Publicado em: 2020-06
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4. Treatment of sugarcane bagasse for the immobilization of soybean β-glucosidase and application in soymilk isoflavones
Resumo O bagaço de cana-de-açúcar, de resíduos agroindustriais, foi autoclavado a 121 °C durante 15 min, tratado com NaOH a 2% e ativado com 2,5% de glutaraldeído, para imobilização de β-glicosidase de soja. Análises de microscopia eletrônica de varredura, espectroscopia de raios X por dispersão de energia e espectroscopia de infravermelho por tr
Braz. J. Food Technol.. Publicado em: 17/10/2019
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5. THERMAL BEHAVIOR OF FOREST BIOMASS WASTES PRODUCED DURING COMBUSTION IN A BOILER SYSTEM
RESUMO Durante a queima da biomassa em sistemas industriais haverá a formação de resíduos contendo cinzas e carbono residual, cujo teor será variável em função da eficiência e dos parâmetros de operação das câmaras de combustão. A caracterização destes resíduos é ferramenta essencial para visualizar a sua potencialidade de reuso energético
Rev. Árvore. Publicado em: 23/09/2019
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6. Argamassas eco-eficientes com incorporação simultânea de material de mudança de fase e cinzas volantes
RESUMO Atualmente, a indústria da construção é um dos principais setores europeus responsáveis pelos elevados níveis de consumo de energia, extração de matérias-primas e produção de resíduos. Cada vez mais o consumo de energia proveniente de fontes renováveis e a reutilização de resíduos industriais constituem a única maneira de minimizar es
Matéria (Rio J.). Publicado em: 10/06/2019
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7. MONITORING OF TRANSPORTATION NETWORK OF CARBONIZATION GASES IN COGENERATION PROJECTS
RESUMO O objetivo desse trabalho foi avaliar o desempenho e a eficiência de um sistema de transporte de gases da carbonização até um queimador. O sistema de transporte de gases da carbonização consiste na retirada destes da chaminé dos fornos, os quais passam por tubulações até atingirem o queimador. Para evitar a condensação dos gases e geraçã
Rev. Árvore. Publicado em: 11/02/2019
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8. Sustainable Glass Foams Produced from Glass Bottles and Tobacco Residue
In this work, discarded soda-lime-silica glass bottles and tobacco residue (after oil extraction to produce biodiesel) were prepared in different formulations to obtain glass foams. The formulated compositions were homogenized and uniaxially compacted at 40 MPa then fired at 850 ºC and 900 ºC for 60 min to investigate the effects of tobacco residue and tem
Mat. Res.. Publicado em: 03/12/2018
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9. Commitment Between Roughness and Crystallite Size in the Vanadium Oxide Thin Film opto-electrochemical Properties
The V2O5 thin films has been widely studied because it has application as ionic host in electrochromic and lithium-ion batteries, two technologies that have an intimate connection with sustainability as substitutes for fossil energies and as agents for improving energy efficiency. In electrochromic technology, V2O5 is applied as a passive electrode due to it
Mat. Res.. Publicado em: 01/11/2018
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10. Photoacoustic-based thermal image formation and optimization using an evolutionary genetic algorithm
Abstract Introduction For improved efficiency and security in heat application during hyperthermia, it is important to monitor tissue temperature during treatments. Photoacoustic (PA) pressure wave amplitude has a temperature dependence given by the Gruenesein parameter. Consequently, changes in PA signal amplitude carry information about temperature varia
Res. Biomed. Eng.. Publicado em: 28/05/2018
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11. Aqueous Nanofluids Based on Copper MPA: Synthesis and Characterization
The application and use of efficient cooling fluids have become increasingly important due to the increasing industrial and energy demand associated with the miniaturization of various electronic devices. The search for high-efficiency heat exchanger fluids in the early 1990s led to the development of a new class of refrigerants called nanofluids. The use of
Mat. Res.. Publicado em: 11/01/2018
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12. DIAGNOSIS AND RECOMMENDATIONS FOR THE BIOCLIMATIC DESIGN OF GRAPE PACKING HOUSES IN HOT AND DRY CLIMATE
ABSTRACT The bioclimatic architecture can contribute significantly to moderate thermal environment of agricultural installations, reducing the energy input used in the air conditioning. The present article presents the results of a diagnosis made in packing houses of table grapes, located in a semi - arid region in the Brazilian Northeast. The objective was
Eng. Agríc.. Publicado em: 2018-01