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| Registros recuperados: 59 | |
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| Konrad,Odorico; Koch,Fabio F.; Lumi,Marluce; Tonetto,Jaqueline F.; Bezama,Alberto. |
| In this study, was studied the biogas generation from swine manure, using residual glycerine supplementation. The biogas production by digestion occurred in the anaerobic batch system under mesophilic conditions (35°C), with a hydraulic retention time of 48 days. The experiment was performed with 48 samples divided into four groups, from these, one was kept as a control (without glycerin) and the other three groups were respectively supplemented with residual glycerine in the percentage of 3%, 6% and 9% of the total volume of the samples. The volume of biogas was controlled by an automated system for reading in laboratory scale and the quality of the biogas (CH4) measured from a specific sensor. The results showed that the residual glycerine has high... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Biogas; Residual glycerin; Swine manure; Renewable energy. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162014000500004 |
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| Caraschi,José C.; Viana,Ronaldo da S.; Moreira,Bruno R. de A.; Prates,Glaucia A.. |
| ABSTRACT The aim of this study was to evaluate the energetic potential achieved by the application of phyto-regulators to sweet sorghum cultivars. A randomized complete block design was used. Experiments were conducted using two sweet sorghum cultivars (BRS 508 and BRS 509), fourphyto-regulators (ethephon, ethyl-trinexapac, glyphosate, and sulfometuron-methyl), and a control; four replicates were performed 70 days after sowing, at the beginning of the flowering phase of the plants, with the aid of a CO2-pressurized coastal sprayer. The plants were harvested after 40 days, with the stems being cleared at the height of the apical bud, and were subjected to grinding for the extraction of broth. The following analyses were carried out: chemical (total... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Green Energy; Bioenergy; Biofuel; Renewable energy. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162019000400426 |
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| Silva,Robson L. da; Paula,Isabele O. de; Patelli Júnior,José R.; Torres,Tainara R. C.; Pereira,Thiago V.. |
| ABSTRACT This research presents results of the assessment of solid biofuels (residual biomasses from agricultural crops) in the state of Mato Grosso do Sul, in the period 2007-2012, for energy in agricultural uses. It is pointed out the available quantity, its geographic location at micro and meso regions and energy conversion potential. The methodology is based on a survey on municipal agricultural production of the Brazilian Institute for Geography and Statistics (quantity and local availability, per year) followed by determination of the amounts of agricultural assessed residues, and then applying equations from the literature to estimate the amount of energy (J) and power (kW) obtained from the thermal conversion of residual biomasses. Results are... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Renewable energy; Solid biofuels; Combustion; Torrefaction; Powerplants. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162017000300433 |
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| Haraldsson, Matilda; Raoux, Aurore; Riera, Fabien; Hay, Julien; Dambacher, Jeffrey M.; Niquil, Nathalie. |
| Models of social-ecological systems (SES) are acknowledged as an important tool to understand human-nature relations. However, many SES models fail to integrate adequate information from both the human and ecological subsystems. With an example model of a future Offshore Wind Farm development and its effects on both the ecosystem and local human population, we illustrate a method facilitating a “balanced” SES model, in terms of including information from both subsystems. We use qualitative mathematical modeling, which allows to quickly analyze the structure and dynamics of a system without including quantitative data, and therefore to compare alternative system structures based on different understandings of how the system works. By including similar... |
| Tipo: Text |
Palavras-chave: Network; Renewable energy; Eastern English channel; Perception; Qualitative modeling; Acceptance. |
| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00631/74300/73944.pdf |
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| Hufnagl, Marc; Payne, Mark; Lacroix, Genevieve; Bolle, Loes J.; Daewele, Ute; Dickey-collas, Mark; Gerkema, Theo; Huret, Martin; Janssen, Frank; Kreus, Markus; Paetsch, Johannes; Pohlmann, Thomas; Ruardij, Piet; Schrum, Corinna; Skogen, Morten D.; Tiessen, Meinard C. H.; Petitgas, Pierre; Van Beek, Jan K. L.; Van Der Veer, Henk W.; Callies, Ulrich. |
| Hydrodynamic Ocean Circulation Models and Lagrangian particle tracking models are valuable tools e.g. in coastal ecology to identify the connectivity between offshore spawning and coastal nursery areas of commercially important fish, for risk assessment and more for defining or evaluating marine protected areas. Most studies are based on only one model and do not provide levels of uncertainty. Here this uncertainty was addressed by applying a suite of 11 North Sea models to test what variability can be expected concerning connectivity. Different notional test cases were calculated related to three important and well-studied North Sea fish species: herring (Clupea harengus), and the flatfishes sole (Solea solea) and plaice (Pleuronectes platessa). For sole... |
| Tipo: Text |
Palavras-chave: Ocean circulation; Lagrangian approach; Variability; Marine protected areas; Renewable energy; Wind park; Model intercomparison; Ensemble. |
| Ano: 2017 |
URL: https://archimer.ifremer.fr/doc/00385/49660/50198.pdf |
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| Santos, Rosimeire Cavalcante dos; Carneiro, Angélica de Cássia Oliveira; Castro, Renato Vinícius Oliveira; Pimenta, Alexandre Santos; Castro, Ana Flávia Neves Mendes; Marinho, Itaragil Venâncio; Boas, Mariana Almeida Villas. |
| This study aimed to evaluate the potential use of waste generated by forestry species that occur in semiarid northeastern at Seridó region, Rio Grande do Norte, for the briquettes production, determine the physical and mechanical briquettes properties, and to correlate the wood density with the density after the briquettes production and briquettes density with the compressive strength. Thirty-two trees were collected (eight species with four replications). The wood physical and chemical properties evaluation were held under a completely randomized design. For the variables related to briquette, it was adopted the same design with three replicates for each species, totalizing 24 sampling units. The briquettes produced with jurema-preta wood stood out as a... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Forest residues; Briquetting; Renewable energy; Semi-arid Brazilian region Resíduos florestais; Briquetagem; Energia renovável; Região semiárida brasileira. |
| Ano: 2011 |
URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/292 |
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| Protásio,Thiago de Paula; Trugilho,Paulo Fernando; Napoli,Alfredo; Silva,Marcela Gomes da; Couto,Allan Motta. |
| The objective of this work was to evaluate the carbonization yield of babassu nutshell as affected by final temperature, as well as the energy losses involved in the process. Three layers constituting the babassu nut, that is, the epicarp, mesocarp and endocarp, were used together. The material was carbonized, considering the following final temperatures: 450, 550, 650, 750, and 850ºC. The following were evaluated: energy and charcoal yields, pyroligneous liquid, non-condensable gases, and fixed carbon. The use of babassu nutshell can be highly feasible for charcoal production. The yield of charcoal from babassu nutshell carbonization was higher than that reported in the literature for Eucalyptus wood carbonization, considering the final temperature of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Alternative biomass; Charcoal; Iron industry; Renewable energy. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2014000300189 |
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| Aravindhakshan, Sijesh C.; Koo, Won W.. |
| Energy, agriculture, and GHG emissions are highly interrelated. Several agricultural commodities are currently used as feedstock for biofuel production to replace fossil fuels. As the largest consumer of energy, the U.S. has taken several initiatives to reduce the use of fossil fuels, achieve energy security, and reduce GHG emissions. The industrial community of the U.S. invested heavily in biofuel and wind energy production. North Dakota has highest potential in producing wind energy and biomass from dedicated energy crops. Unfortunately these resources are not fully utilized for producing renewable energy. North Dakota is an energy intensive economy and per capita energy consumption is higher than other states. This technical bulletin provides a... |
| Tipo: Report |
Palavras-chave: Renewable energy; Wind power; Ethanol; Greenhouse gas emissions; Agriculture; Agribusiness; Resource /Energy Economics and Policy. |
| Ano: 2011 |
URL: http://purl.umn.edu/101222 |
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| van Kooten, G. Cornelis; Timilsina, Govinda R.. |
| In this study, the prospects of wind power at the global level are reviewed. Existing studies indicate that the earth’s wind energy supply potential significantly exceeds global energy demand. Yet, only 1% of the global electricity demand is currently derived from wind power despite 40% annual growth in wind generating capacity over the last 25 years. More than 98% of total current wind power capacity is installed in the developed countries plus China and India. Existing studies estimate that wind power could supply 7% to 34% of global electricity needs by 2050. Wind power faces a large number of technical, financial, institutional, market and other barriers. To overcome these, many countries have employed various policy instruments, including capital... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Wind energy; Renewable energy; Electricity grids; Resource /Energy Economics and Policy; Q25; Q32; Q42; Q48. |
| Ano: 2008 |
URL: http://purl.umn.edu/45665 |
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| Rosa, Franco. |
| Policy makers are searching for viable strategies to produce alternative energies; the agricultural sector can become an important supplier of renewable energy. The paper will develop the IFECO (integrated farm energy cogeneration) approach, a conceptual model of farm though as it were an "island economy"a a net energy exporter as the energy output exceeds the direct energy (cultivation, cropping, plant protection, transport, harvesting, storage) and indirect energy (fertilizer, pesticide, machinery, plantationforce, others) used in sunflower cultivation. IFECO is based on the cogeneration that is the production of different energies from a single agricultural commodity to achieve the three targets that make this project sustainable: i) economic... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: IFECO; Renewable energy; Biodiesel; Cogeneration; Sunflower; Simulation; Agribusiness; Resource /Energy Economics and Policy. |
| Ano: 2007 |
URL: http://purl.umn.edu/6578 |
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| Gergely, Sandor. |
| Az Európai Unióban 2004-ben 13,9% a nem fosszilis, megújuló energiahor-dozók részaránya az energiatermelésben, amelyet 2010-re 22,1%-ra terveznek emelni. Hazánkban ez az arány 2004-ben 0,9%, amelyet 2010-re 3,6%-ra kellene emelnünk; ezt vállaltuk csatlakozásunkkor. A következő hat évben négyszeresére kell növelni a megújuló energiahordozók termelését, felhasználását. Heves megyében is egyre nagyobb jelentőségre tesz szert az a törekvés, hogy növekvő energiaigényét minél kedvezőbb áron tudják kielégíteni. Az imént emlí-tett mindkét alapvető szempontnak megfelel az, ha minél teljesebb mértékben hasznosítják a megyékben található biomassza energetikai tartalékokat. A szerző irányításával a Károly Róbert Főiskola kutatói, oktatói a Gyöngyös Körzete Kistérség... |
| Tipo: Journal Article |
Palavras-chave: Megújuló energia; Energia-erdő program; Gyöngyös kistérség; Renewable energy; Energy-forest programme; Gyöngyös District; Agricultural and Food Policy; Environmental Economics and Policy; Production Economics. |
| Ano: 2005 |
URL: http://purl.umn.edu/54852 |
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| Darmstadter, Joel. |
| This paper looks at the status and prospects of renewables-with particular emphasis on windpower-in the electric power sector. Although renewables account for a steadily rising share of electricity generation in various countries, their role remains small in absolute terms. In part, this is because of technological progress of and successful competition from fossil-fueled generation-notably, combined cycle gas turbines. While diminishing, subsidies continue to be indispensable to the use of renewables in most places. Viability of renewables-based electricity is undermined by the cost of externalities for which fossil energy combustion is only partially charged. A number of countries (and states in the U.S.) have launched obligatory requirements for... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Renewable energy; Electricity; Windpower; Externalities; Environmental Economics and Policy; Q21; L94. |
| Ano: 2003 |
URL: http://purl.umn.edu/10777 |
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| Registros recuperados: 59 | |
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