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首页> 外文期刊>The Kasetsart Journal >Thermodynamic Properties of Gas Generated by Rapeseed Methyl Ester-Air Combustion Under Fuel-Lean Conditions
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Thermodynamic Properties of Gas Generated by Rapeseed Methyl Ester-Air Combustion Under Fuel-Lean Conditions

机译：贫油条件下菜籽甲基酯-空气燃烧产生的气体的热力学性质

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摘要

Biodiesel in the form of rapeseed methyl ester (RME) has been widely used for transportation as a partial (or complete) substitute fuel for compression ignition (diesel) engines. The properties of gas generated by the combustion of RME and air under fuel-lean conditions were studied. A simple analytical model was used to determine the burned gas composition. Firstly, the effects of relative air/fuel ratios on flue gas composition were studied theoretically, without exhaust gas recirculation (EGR). As the relative air/fuel ratios increased, carbon dioxide and water vapor decreased, while oxygen increased in the burned gases. The mass and molecular weight of the burned gas reduced with increasing relative air/fuel ratios. Secondly, the thermodynamic properties (i.e. specific heat, specific heat ratio, enthalpy and entropy) of the burned gas mixture, as they were affected by the relative air/fuel ratio, were calculated based upon the element concentrations of individual component in the chemical equilibrium state. The thermodynamic properties of RME-air combustion gas were plotted against relative air/fuel ratios under fuel-lean conditions and were compared to those from conventional diesel fuels. Under certain conditions, good agreement was found. This research produced primary data for further calculations regarding the thermochemistry of biodiesel-air combustion analysis.
机译：油菜籽甲酯（RME）形式的生物柴油已作为压燃式（柴油）发动机的部分（或完全）替代燃料广泛用于运输。研究了贫油条件下RME燃烧产生的气体和空气的特性。使用简单的分析模型来确定燃烧的气体成分。首先，在没有废气再循环（EGR）的情况下，从理论上研究了相对空燃比对烟气成分的影响。随着相对空燃比的增加，二氧化碳和水蒸气减少，而燃烧气体中的氧气增加。燃烧气体的质量和分子量随着相对空燃比的增加而降低。其次，根据化学平衡中单个成分的元素浓度，计算了受相对空气/燃料比影响的混合气体的热力学性质（即比热，比热比，焓和熵）。州。将RME空气燃烧气体的热力学性质相对于稀燃条件下的相对空燃比作图，并与常规柴油的热力学性质进行比较。在某些条件下，达成了良好的协议。这项研究产生了初步数据，可用于进一步计算生物柴油-空气燃烧分析的热化学。

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