Motor gerador ciclo diesel sob cinco proporções de biodiesel com óleo diesel

Abstract

R ESU M OO estudo de fontes alternativas de energia ao óleo diesel mineral, como o biodiesel, com origem renovável, é importante para o meio-ambiente e diversificação da matriz energética. Neste estudo foram levantados o consumo específico de combustível, o valor calórico do combustível e a eficiência do conjunto motor gerador da marca BRANCO em função de cargas resistivas, sob as seguintes proporções volumétricas entre o óleo diesel mineral com biodiesel: 0% (B0), 20% (B20), 40% (B40), 60% (B60) e 100% de biodiesel (B100). Para o ensaio utilizou-se motor de 7,36 kW, com gerador elétrico acoplado de 5,5 kW. As cargas utilizadas, 0,5 kW; 1,0 kW; 1,5 kW e 2,0 kW foram elevadas até 5,0 kW, oriundas de um dinamômetro de cargas resistentes. Assim, o desempenho do conjunto para cargas abaixo de 1,5 kW mostrou-se menor, pelo maior consumo específico de combustível (CEC), e redução na eficiência do conjunto motor gerador para a faixa de potência. Para as proporções de biodiesel B40, B60 e B100 os resultados descreveram redução no valor calórico e aumento do CEC. Portanto, realizando comparação das proporções de biodiesel com o óleo diesel, a proporção B20 substitui parcialmente o óleo diesel, sem perdas significativas do desempenho do motor gerador. Palavras-chave: consumo específico de combustível, valor calórico, eficiência do conjunto motor geradorEngine-generator diesel cycle under five proportions of biodiesel and diesel A B ST R A C T The study of mineral diesel alternatives, such as biodiesel, a renewable fuel, is important for the environment and to diversify energy sources. This study evaluated an engine-generator BRANCO brand. Specific fuel consumption, calorific value and the overall efficiency as a function of the system load was measured, using diesel oil and biodiesel blends. The biodiesel proportions in the composition were 0% (B0), 20% (B20), 40% (B40), 60% (B60), and 100% (B100). The engine that was used during the test has a power of 7.36 kW, and the electric generator was 5.5 kW. The group was submitted to resistive loading, in the range: 0.5 kW, 1.0 kW, 1.5 kW; growing up to 5.0 kW. The results have shown that, when operating at lower loads (less than 1.5 kW), the engine-generator performance decreased, while the specific consumption increased, leading to an efficiency reduction. The biodiesel proportions B40, B60 and B100 described reduction in caloric value and increased the specific fuel consumption. Therefore, comparing the proportions of biodiesel with diesel oil, the proportion B20 replaced diesel oil without significant losses in engine-generator performance.

Comparison of the combustion, performance, and emission characteristics of inedible Crambe abyssinica biodiesel and edible hazelnut, corn, soybean, sunflower, and canola biodiesels

“…Moreover, crambe oil has high amount of oil about 23–38% in its chemical structure. High content of erucic acid (57.8%) in crambe oil gives important properties to the biodiesel . Rosa et al .…”

“…Moreover, crambe oil has high amount of oil about 23-38% in its chemical structure. High content of erucic acid (57.8%) in crambe oil gives important properties to the biodiesel [17][18][19][20][21][22][23][24][25][26][27]. Rosa et al [18] experimented the effects of biodiesel based on crambe oil and diesel fuel on thermal efficiency, specific fuel consumption (SFC) and exhaust emissions in a diesel engine.…”

“…However, significant amount of reduction was observed 43.42, 38.56, 9.06, 65.73% for CO, NO, NO x , and SO 2, respectively. Silva et al [21] aimed to determine the relationship between nitrogen content of crambe oil and chlorophyll meter readings in leaves of crambe. They have concluded that there was no strong correlation between chlorophyll and leaf nitrogen on crambe.…”

Effect of anhydrous ethanol/gasoline blends on performance and exhaust emissions of spark-ignited non-road engines

“…where Cm is the mass consumption [g.min −1 ]; C en is the energy fuel consumption [cal.min −1 ]; LCV is the lower calorific value [cal.g −1 ]. Finally, according to Silva et al (2012), the efficiency of engine-generators systems (conversion of chemical energy to the generation of electricity) was evaluated using Eq. 4.…”

Desempenho Do Trator Agrícola Em Função Das Marchas E Das Proporções De Biodiesel

“…Dentre as vantagens do uso do biodiesel, pode-se citar a redução de 40% de fuligem nas emissões, além de contribuir para uma melhor lubrificação do motor (COSTA NETO et al, 2000). Assim, o biodiesel é uma fonte de energia renovável alternativa ao óleo diesel, tendo como fonte principal os óleos vegetais e gorduras animais (SILVA et al, 2012) e que a mistura B20 substituiu parcialmente o óleo diesel sem perdas significativas de desempenho do motor. Já Nietiedt et al (2011) verificaram que o melhor desempenho do motor ocorreu para as misturas B5 e B10.…”