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| Registros recuperados: 38 | |
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| Konopatzki, Evandro André; Christ, Divair; Coelho, Silvia Renata Machado; Nobrega, Lúcia Helena Pereira da; Dellagostin, Simone; Lenz, Anderson Miguel. |
| New grain drying techniques have been improved to reduce post-harvest losses. The electric air dehumidifier (UTA 60®) is an example; it was installed at the ELLITT Seed Company for drying soybean seeds (TEC 7849) with random sample collection (DIC). Our objective was to evaluate the immediate and latent effects of the dehumidified air on the vigour of the seeds. Our vigour analysis method was based on the Rules for Seed Analysis (RAS), and our results showed an immediate significant difference in seedling percentage, but the germination level did not have an effect at 5% (Dunnett's test). In latent effects, at 5% (Tukey test), there was a reduction in the germination percentage and emergence rate, but it was not possible link such variations to the drying... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Air dehumidification; Air handling unit; Electricity; Germinative vigour; Glycine max. |
| Ano: 2019 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/42706 |
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| NWOKE, OJI ACHUKA; Okonkwo, Wilfred Ifeanyi; Echiegu, Emmanuel Amagu; Ugwuishiwu, Boniface Obinwanne; Okechukwu, Chibueze Henry. |
| The work aimed at determination of calorific value of municipal solid waste in Enugu, Nigeria and its potential for electricity generation. Random truck sampling was used according to American Society of Test and Material (ASTM) in the collection of samples at Ugwuaji landfill site, Enugu, Nigeria and calorific value was determined using oxygen bomb calorimeter. Enugu has a present population of 882,178 and the amount of municipal solid waste generated in Enugu was estimated to be 420 tonnes daily and this resulted in waste generation rate of 0.48kg/capita/day. The average composition of the municipal solid waste was 39% putrescible, 11% paper, 21% plastics, 5% textile, and 2% metal, 3% glass and 19% others. The average moisture content Volatile... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Municipal solid waste; Calorific value; Composition; Energy content; Electricity. |
| Ano: 2020 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/5061 |
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| Bernard, Kivumbi. |
| This study was aimed at assessing the techno-economic potential of municipal solid waste (MSW) generated in Kampala City for electricity production through gasification. The quantity, characteristics and gasification parameters were determined. In addition, the gasifier- engine system components were sized, and an economic analysis was conducted to obtain the net present value (NPV) and the payback period. This study found that 523 t/d of MSW is collected in Kampala City. The biomass component of MSW was found to be 459.5 t/d with moisture content of 71.09% on as-received basis. The physical characteristics of the gasified biomass included 11.8% moisture content, 88.2% total solids, 25.9% ash content and 57.7 kg/m3 bulk density. The resulting normalized... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Municipal solid waste; Biomass; Gasification; Economic analysis; Producer gas; Electricity. |
| Ano: 2015 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/3363 |
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| Sandim,Álvaro A.; Batista,Alexandre G.; Bareta,Maria Luiza E.; Betini,Roberto C.; Pepplow,Luiz Amilton. |
| Abstract Advances in energy demand in rural areas cannot be dissociated from agricultural modernization, large estates, mechanization of labor and reduced investment in small production. The use of biogas together with biomass are the most cost-effective ways for the small producer, as it has a high calorific value. In the case of biogas the procedure is performed by combining a compressor and a chiller, allowing the gas enter the reactor and burn together with the air stream. The use of these techniques is an auxiliary way to reduce the cost of the producer to produce a certain crop, besides allowing a participation in the final energy supply, so that the utilities have an alternative to distribute the surplus energy to another region, serving thus a... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Biogas; Biomass; Rural areas; Electricity. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132019000200201 |
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| Ambrosio,Rodrigo; Pauletti,Volnei; Barth,Gabriel; Povh,Fabrício Pinheiro; Silva,Dimas Agostinho da; Blum,Hilbert. |
| ABSTRACT Agricultural residual biomass is an important source of energy, and its production and quality vary according to the crop management. This study aimed to assess the effects of plant distribution and nitrogen fertilization on the energy production potential of the biomass of maize cultivated under no tillage. The field experiment was installed in southeast Brazil using five nitrogen rates (0, 60, 120, 180, and 240 kg ha-1) and two inter-row spacings (0.4 and 0.8 m). Grain yield, residual biomass productivity, and bioenergy potential in different parts of the plant (grain, stalk+leaf, husk, and cob) were assessed. No change in grain yield was observed using narrow row spacing. Stalk+leaf and husk productivity was higher using 0.8 m than using 0.4 m... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Renewable energy; Zea Mays (L.); Calorific value; Electricity; Macronutrients.. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542017000600626 |
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| Rodrigues,Rafael V.; Rossi,Luiz A.. |
| ABSTRACT The successful in the implementation of wind turbines depends on several factors, including: the wind resource at the installation site, the equipment used, project acquisition and operational costs. In this paper, the production of electricity from two small wind turbines was compared through simulation using the computer software HOMER - a national model of 6kW and an imported one of 5kW. The wind resources in three different cities were considered: Campinas (SP/BR), Cubatão (São Paulo/BR) and Roscoe (Texas/ USA). A wind power system connected to the grid and a wind isolated system - batteries were evaluated. The results showed that the energy cost ($/kWh) is strongly dependent on the windmill characteristics and local wind resource. Regarding... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Homer; Wind power; Electricity. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162016000200281 |
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| Chary, Killian; Aubin, Joel; Guinde, Loic; Sierra, Jorge; Blazy, Jean-marc. |
| Biomass is a promising renewable alternative to decarbonize and to secure energy production on small islands, as most insular power generation systems rely heavily on imported fossil fuels. Feedstock procurement is a key aspect of bioenergy chain sustainability, and local resources as well as imported biomass can be considered if the electricity generated presents environmental benefits. We used Life Cycle Assessment (LCA) to evaluate the environmental impacts of 1 kWh of electricity produced in Guadeloupe from the combustion of locally grown energy cane and imported wood pellets. The energy cane agricultural supply was simulated using a bio-economic model to elaborate and analyze five scenarios involving different biomass mixes and geographical areas of... |
| Tipo: Text |
Palavras-chave: LCA; Electricity; Energy cane; Wood pellet; Islands; Saccharum sp.. |
| Ano: 2018 |
URL: https://archimer.ifremer.fr/doc/00427/53878/55107.pdf |
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| Palmer, Karen L.; Burtraw, Dallas. |
| In the mid-1990s, when the Federal Energy Regulatory Commission was preparing to release Order 888 requiring open access to the transmission grid, the commission, environmental groups, and the Environmental Protection Agency, among others, raised the question of how open access and greater competition in wholesale electricity markets might affect the environment. If open access worked as expected, underutilized older coal-fired generators in the Midwest and elsewhere might find new markets for their power, leading to associated increases in air pollution emissions. Restructuring also might lead to retirements of inefficient nuclear facilities, whose generation would be replaced by fossil generation, further increasing emissions. On the other hand, some... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Electricity; Electric utilities; Regulation; Competition; Environment; Air pollution; Natural gas; Coal; Nuclear; Renewables; Customer choice; Resource /Energy Economics and Policy; L51; L94; L98. |
| Ano: 2005 |
URL: http://purl.umn.edu/10656 |
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| Blackman, Allen; Wu, Xun. |
| In the early 1990s, hoping to reduce chronic electricity shortages and enhance the efficiency of Chinese power plants, China opened its doors to foreign direct investment (FDI) in electricity generation. Using data from an original survey of US private investors, official Chinese statistics, and other sources, we assess the volume and characteristics of FDI in China's power sector, its impact on energy efficiency, and the factors that limit this impact. Our five principal findings are as follows. First, the volume FDI in China's power sector will likely fall short of the government's 1995 - 2000 capacity expansion target by a substantial margin, most likely because of persistent institutional barriers to FDI. Second, to avoid the lengthy central government... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Foreign direct investment; China; Electricity; Resource /Energy Economics and Policy. |
| Ano: 1998 |
URL: http://purl.umn.edu/10606 |
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| Bernard, Jean-Thomas; Guertin, Chantal. |
| Since January 1, 1997, the wholesale electricity market in the United States has been open to competition. To satisfy the reciprocity requirements imposed by the Federal Energy Regulatory Commission, Hydro-Quebec, a Canadian utility, made its transmission grid accessible to third parties. Under the current regulation, transmission losses are taken into account through a single, constant rate; location and time of use play no role. Hydro-Quebec generates most of its electricity from hydro resources. Long high-voltage power lines link production in the North to consumption centers in the South, where there are interconnections with neighboring areas. We develop an optimization model that allows us to calculate nodal prices on the basis of the opportunity... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Electricity; Transmission pricing; Hydropower; Resource /Energy Economics and Policy; L94. |
| Ano: 2002 |
URL: http://purl.umn.edu/10724 |
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| Registros recuperados: 38 | |
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