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Registros recuperados: 21
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Producao e consumo de energia na agricultura. Infoteca-e
SEIXAS, J.; MARCHETTI, D..
1982
Tipo: Documentos (INFOTECA-E) Palavras-chave: Agricultura; Energia; Producao; Consumo; Energy consumption; Agriculture; Production; Energy; Agricultural use; Consumo de energia; Consumption; Uso agrícola.
Ano: 1982 URL: http://www.infoteca.cnptia.embrapa.br/handle/doc/549451
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Consumo de combustivel e energia na producao de soja. Infoteca-e
ROESSING, A. C.; GAZZIERO, D. L. P.; MESQUITA, C. M..
bitstream/item/192030/1/Roessing.-Consumo-de-combustiveis....pdf
Tipo: Artigo de divulgação na mídia (INFOTECA-E) Palavras-chave: Consumo de energia; Brasil; Parana; Soybean; Production; Energy consumption; Produção; Soja; Brazil.
Ano: 1983 URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/444470
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Comparacao do coeficiente de tracao e da eficiencia tratoria de um trator agricola obtidos pela equacao de Wismer e Luth e por ensaios de campo. Repositório Alice
ACUNA, R.R.D.; MANTOVANI, E.C.; MARTYN, P.J.; BERTAUX, S..
Este trabalho foi realizado visando determinar o coeficiente de tracao e a eficiencia tratoria de um trator agricola num Latossolo Vermelho-Escuro, por meio de ensaio de campo e compara-los com os obtidos pela equacao e Wismer & Luth (1973). Foram determinados a forca de tracao na barra, a potencia na barra e na TDP, o consumo de combustivel, velocidade de avanco, patinagem e a rotacao do eixo do motor. Os resultados das comparacoes efetuadas mostraram que houve uma correlacao de 74% entre os valores observados e calculados da forca de tracao e indicando ser a equacao valida para as condicoes em que foi realizado este trabalho.
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Analise dimensional; Eficiencia tratoria; Consumo de energia; Simulacao da forca de tracao; Desempenho de trator; Dimensional analysis; Tractive efficiency; Energy consumption; Prediction of the tractive efficiency; Tractor performance.
Ano: 1995 URL: http://www.alice.cnptia.embrapa.br/handle/doc/104211
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The relationship between energy consumption, energy prices and economic growth: Time series evidence from Asian developing countries AgEcon
Asafu-Adjaye, John.
This paper estimates the causal relationships between energy consumption and income for India, Indonesia, the Philippines and Thailand, using cointegration and error-correction modelling techniques. The results indicate that, in the short-run, unidirectional Granger causality runs from energy to income for India and Indonesia, while bidirectional Granger causality runs from energy to income for Thailand and the Philippines. In the case of Thailand and the Philippines, energy, income and prices are mutually causal. The study results do not support the view that energy and income are neutral with respect to each other, with the exception of Indonesia where neutrality is observed in the short-run.
Tipo: Presentation Palavras-chave: Energy consumption; Economic growth; Granger causality; Resource /Energy Economics and Policy.
Ano: 1999 URL: http://purl.umn.edu/123754
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Pattern of energy use in high-yielding sali rice varieties in Assam, northeast India International Rice Research Institute
Saikia, H.; Halim, R. A.; Bhowmick, B. C..
p.68-69
Palavras-chave: Energy consumption; Energy cost of production; Labour; Draft animals; Tractors; Rotary cultivators; Farm size; Operation; Input output analysis; Cost benefit analysis.
Ano: 2004 URL: http://hdl.handle.net/123456789/864
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Energy-irrigation nexus in South Asia: Improving groundwater conservation and power sector viability AgEcon
Shah, Tushaar; Scott, Christopher A.; Kishore, Avinash; Sharma, Abhishek.
2nd rev. ed.
Tipo: Report Palavras-chave: Groundwater irrigation; Energy consumption; Irrigation systems; Pumps; Tube wells; Policy making; User charges; Costs; Agricultural and Food Policy; Agricultural Finance; Crop Production/Industries; Marketing; Production Economics; Research Methods/ Statistical Methods.
Ano: 2004 URL: http://purl.umn.edu/44557
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Agricultural and non-agricultural outputs and energy consumption in Tunisia: empirical evidences from cointegration and causality AgEcon
Chebbi, Houssem Eddine; Boujelbene, Y..
This short paper investigates the cointegration and causality link between energy consumption and agricultural, non-agricultural outputs (manufacturing sector and services sector) and overall gross domestic product in Tunisia for 1971-2003 period. Empirical results suggest that there is only unidirectional causality running from agricultural and non-agricultural sectors to energy consumption as well as from overall GDP growth to energy consumption. This unidirectional causality signifies a less energy dependent economy and suggests that it is sectoral growth that drives the energy consumption in Tunisia and not vice versa. Empirical results suggest also that Tunisian agricultural sector growth does not depend on energy, and high consumption of energy do...
Tipo: Conference Paper or Presentation Palavras-chave: Energy consumption; Output growth; Causality; Cointegration; Tunisia; Resource /Energy Economics and Policy.
Ano: 2008 URL: http://purl.umn.edu/44055
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Energy Consumption and Economic Growth: Evidence from COMESA Countries AgEcon
Chali, Nondo; Mulugeta, Kahsai.
This study applies panel data techniques to investigate the long-run relationship between energy consumption and GDP for a panel of 19 African countries (COMESA) based on annual data for the period 1980-2005. In the first step, we examine the degree of integration between GDP and energy consumption by employing three panel unit root tests and find that the variables are integrated of order one. In the second step, we investigate the long-run relationship between energy consumption and GDP. Results overwhelming show that GDP and energy consumption move together in the long-run. In the third step, we estimate the long-run relationship and test for causality using panel-based error correction models. The results indicate that long-run and short-run causality...
Tipo: Conference Paper or Presentation Palavras-chave: Energy consumption; GDP; Panel Causality tests; International Development; Resource /Energy Economics and Policy; O13; O55.
Ano: 2009 URL: http://purl.umn.edu/46450
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Analysis on Industry Structure Adjustment and Energy Consumption Based on Grey Theory—A Case Study of Qinghai Province AgEcon
Zhang, Yin-ling; Wang, Dan-tong; Zhao, Wei.
In view of the complexity and non-linearity of energy consumption system and the status quo of the development of energy in Qinghai province, the relations between energy consumption and industrial structure is analyzed by using the quantitative analysis of grey relation degree by using the grey system theory. The relevancy degree among the primary industry, the secondary industry and the tertiary industry and living energy consumption are obtained, and then the trend of energy consumption in the following several years can be predicted. The results show that the secondary industry has the largest relevancy degree to the total energy consumption. In the end, according to the results of the research, several suggestions on how to saving energy are put...
Tipo: Journal Article Palavras-chave: Grey relevancy analysis; Grey correlation degree; Industrial structure; Energy consumption; Qinghai Province; China; Agribusiness.
Ano: 2011 URL: http://purl.umn.edu/113929
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Resource use pattern and agroecosystem functioning in Rawanganga micro-watershed in Garhwal Himalaya, India JARTS
Bagwari, Hari Krishan; Department of Forestry, P.Box-59, HNB Garhwal University, Srinagar Garhwal-246 174, Uttarakhnad, India; Todaria, Nagendra Prasad; Department of Forestry, P.Box-59, HNB Garhwal University, Srinagar Garhwal-246 174, Uttarakhnad, India.
Agro-ecological resource use pattern in a traditional hill agricultural watershed in Garhwal Himalaya was analysed along an altitudinal transect. Thirty one food crops were found, although only 0.5% agriculture land is under irrigation in the area. Fifteen different tree species within agroforestry systems were located and their density varied from 30-90 trees/ha. Grain yield, fodder from agroforest trees and crop residue were observed to be highest between 1200 and 1600 m a.s.l. Also the annual energy input- output ratio per hectare was highest between 1200 and 1600 m a.s.l. (1.46). This higher input- output ratio between 1200-1600 m a.s.l. was attributed to the fact that green fodder, obtained from agroforestry trees, was considered as farm produce. The...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Forestry; Agroforestry agroecosystem; Altitude; Energy consumption; Energy input-output ratio; Agricultural crops; Garhwal Himalaya.
Ano: 2012 URL: http://www.jarts.info/index.php/jarts/article/view/2012011740340
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Evaluation of the heating of broilers in shed by means of gas hoods and underfloor heating REA
Leva,Flávia F. de; Camacho,José R.; Oliveira Filho,Delly.
This study was conducted to evaluate and compare the behavior of the heating inside poultry shed through gas hood and underfloor heating. The experiment was conducted in poultry shed belonging to the Federal Institute of Education, Science and Technology of Triângulo Mineiro Region, Uberlândia city – state of Minas Gerais (MG), Brazil. The dimensions of the shed are 24 meters long and 9.6 meters wide and with a ceiling height of 3.2 meters. The temperature was measured with an optical thermometer of Minipa brand, MT 350 model. It was used, to the analysis of temperature behavior, the public domain software FEMM 4.2, which uses finite elements techniques, with data collected from two lots. Underfloor heating is made using hot water flowing through a...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Energy consumption; Underfloor heating; Environment; Thermal comfort; Solar energy.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162013000400023
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Influencing factors on agricultural transports and their effect on energy consumption and average speed CIGR Journal
Götz, Sebastian; Zimmermann, Nina; Engelhardt, Dirk; Bernhardt, Heinz.
This article deals with the importance of transportation in agriculture, focusing on energy consumption and average speed of different agricultural transport vehicles. Transportation of goods is an important section of both logistics and agricultural production; therefore this article concentrates on the linkage of these two fields of study – agriculture and logistics. Against this background, current trends in logistics and their significance for and impact on agriculture are defined first. The presented data were collected via a road trial comparing agricultural transport vehicles to those commonly deployed in road haulage. The advantages of the well-established tractor lie – of course – in its high cross-country mobility and the many resulting fields of...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Agricultural transports; Energy consumption; Average transport speed; Transport vehicle comparison.
Ano: 2014 URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/2914
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Effect of heat insulation on the energy consumption of recirculating mixed-flow batch grain dryer CIGR Journal
Jokiniemi, Heikki Tapani; Ahokas, Jukka Matias.
The effects of heat insulation on the energy consumption and efficiency of a recirculating mixed-flow type grain dryer were examined.  Energy saving potential was estimated by theoretical calculations and by heat flow measurements.  Actual energy consumption was measured in two identical drying silos, only one of which was insulated.  The measurements were conducted in farm-scale dryers under practical farm working conditions.  Theoretical heat loss calculations and the heat flow measurements predicted an energy saving potential of ca. 5%–9% of the dryer heating energy.  However, the actual energy consumption measurements over three years indicated energy savings of 16%–21% for the insulated dryer compared to its uninsulated counterpart, when energy...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Agriculture engineering grain drying; Grain dryer; Energy consumption; Efficiency; Heat losses; Heat insulation.
Ano: 2014 URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/2929
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Effect of drying temperatures and pre-treatments on drying characteristics, energy consumption, and quality of bell pepper CIGR Journal
Tunde-Akintunde, Toyosi; Oyelade, Olusegun; Akintunde, Babatunde.
Abstract: The effect of air temperature (50°C, 60°C, 70°C, 80°C and 90°C) and pre-treatments (steam, water palm oil-water, groundnut oil-water blanching) on the drying characteristics and quality of bell pepper was investigated.  The results were fitted to six thin-layer drying models and Parabolic model gave the best fit.  The pretreated samples dried faster than untreated samples and had lower values of total energy needed and specific energy requirement.  The ascorbic acid content, color and rehydration index varied from 129.1 to 316.8 mg/100 g dry matter, 0.1 to 0.9, 22 to 33 mL and pretreated dried pepper generally had higher values than untreated samples.   Keywords: modeling, energy consumption, Rehydration index, color, pepper
Tipo: Info:eu-repo/semantics/article Palavras-chave: Modeling; Energy consumption; Rehydration index; Color; Pepper.
Ano: 2014 URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/2741
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Forced-air, vacuum, and hydro precooling of cauliflower (Brassica oleracea L. var. botrytis cv. Freemont): part I. determination of precooling parameters Ciênc. Tecnol. Aliment.
Alibas,Ilknur; Koksal,Nezihe.
The aim of the present study was to precool cauliflower using forced-air, vacuum and high and low flow hydro cooling methods. The weight of the precooled cauliflower heads (5000±5 g) was measured before they were placed in standard plastic crates. Cauliflower heads, whose initial temperature was 23.5 ± 0.5 ºC, were cooled until the temperature reached at 1 ºC. During the precooling process, time-dependent temperature and energy consumption were measured, and during vacuum precooling, the decreasing pressure values were recorded, and a curve of time-dependent pressure decrease (vacuum) was built. The most suitable cooling method to precool cauliflower in terms of cooling time and energy consumption was vacuum, followed by the high and low flow hydro and...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Cauliflower; Hydro cooling; Forced-air cooling; Vacuum cooling; Energy consumption; Weight loss.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612014000400013
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Vertical tillage parameters to optimize energy consumption CIGR Journal
Reynolds, Marco Antonio; Campos, Santos Gabriel; Cadena, Martin; Lopez, Juan Antonio; Cuervo, Neftali.
Proper selection and correct use of machinery in agriculture must be understood as a component of a process which aims to optimize crop yield and to make a more efficient use of resources. The objective of this study was the assessment of different chisel plow body arrangements using different settings of the most important operating parameters for tillage work in order to optimize energy consumption for vertical tillage. The influence of different operating parameters of tillage tools on the performance in cultivation practice must be considered before applying deep plowing for a more efficient use of energy. The parameters considered in this study were: 1) working depth based in the critical depth theory 2) position and spacing of chisels 3) number of...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Mecanization; Soil tillage; Conservation energy depth plowing; Tillage; Chisel plow; Energy consumption; Critical depth.
Ano: 2015 URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/3146
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Energy Requirements in the Processing of Cocoa Beans into Powder CIGR Journal
Ogunsina, Babatunde Sunday.
This paper aims to analyse the direct energy utilization in the processing of cocoa beans into powder using energy from the national grid and diesel engine in some cocoa processing factories located in South-western Nigeria. Energy consumption in the processing of cocoa beans into powder was evaluated for the eight major unit operations that cocoa processing entails, namely: cleaning, roasting, winnowing, milling, alkalizing, pressing, butter packing and grinding/sieving. The data obtained were imputed into existing energy equation to estimate the energy requirement for each of the eight unit operations. The results show that total energy expenditure in the processing of raw cocoa bean into powder were 1.815 and 2.384 MJ/Kg using national grid (PHCN) and...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Cocoa beans; Cocoa powder; Energy consumption.
Ano: 2017 URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/3949
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Concentration of hydroalcoholic extracts of graviola (Annona muricata L.) pruning waste by ultra and nanofiltration: Recovery of bioactive compounds and prediction of energy consumption. Repositório Alice
MORAES, I. V. M. de; RABELO, R. S.; PEREIRA, J. A. de L.; HUBINGER M. D.; SHMIDT. F. L..
bitstream/item/179561/1/ART18040.pdf
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Energy consumption; Antioxidant capacity; Phenolic compounds; Fouling; Soursops.
Ano: 2018 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1093143
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Energy analysis and greenhouse gas emission in broiler farms: A case study in Alborz province, Iran CIGR Journal
Omid, Mahmoud; Khanali, Majid; Zand, Sajad.
The goal of this study was to examine the energy flows for poultry breeding in broiler production farms in Alborz province of Iran. Data were obtained randomly from 30 poultry production farms using a face to face questionnaire method. The results indicated that the total input energy was 189805.48 MJ per 1000 birds, while the output energy was 28151.17 MJ/(1000 bird). Net energy was negative, -161654.31 MJ/(1000 bird), implying that energy had been lost. Energy use efficiency was calculated as 0.15, showing the inefficient use of energy in the broiler production farms. The fuel energy (energy content of the fuel) with a share of 58.35% had the highest share of input energy and the feed energy by 29.71% was the next. Greenhouse gas (GHG) emission of the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Broiler production; Energy consumption; Environmental analysis; GHG emission; Marginal physical productivity.
Ano: 2018 URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/4157
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Analysis of Production and Consumption of Electric Energy in the Green Office of UTFPR in Curitiba BABT
Krasnhak,Larissa Barbosa; Mello,Elis Almeida Medeiros de; Moura,Guilherme R.; Santos,Francielle da Rocha; Urbanetz Junior,Jair.
ABSTRACT The increasing demand for electricity and the scarcity of resources, require renewable energy sources and efficient equipment that reduce the consumption of electricity. The Green Office (GO) of the Universidade Tecnológica Federal do Paraná (UTFPR) is a sustainable building that uses strategies to reduce impacts to the environment, one of them being the use of the grid connected photovoltaic system (on-grid). The on-grid was installed in 2011 and since then has been feeding the GO and another building (block V) belonging to UTFPR. This article presents a comparison between an estimate of energy consumption and the generation of energy through the on-grid. By means of the estimated consumption, a survey in loco of the scenario of expenditures of...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Green Office; Photovoltaic Solar Energy; Energy consumption; Energy production.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132018000200233
Registros recuperados: 21
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