ABSTRACT

This study reports the influences of ternary fuel mixtures consisting of liquefied propane-butane-hydrogen as additives and methanol, ethanol, iso-octane, hexane, benzene, toluene and gasoline as primary fuels on the performance specifications such as variation of power, thermal efficiency, exergy efficiency and NO of a spark ignition (SI) engine by using a combustion model. Mass ratio of one kind of gas fuels has been kept constant as 50%, mass ratios of other two kinds of gas fuels have been ranged from 10 to 50%. Hydrogen addition to mixtures has parabolically affected the variation of performance characteristics. However, they have been linearly affected by propane and butane additions. Increment and reduction trends of the performance characteristics have changed depending on liquid fuel kinds. Maximum power output is observed with 50% mixture of toluene, minimum power output is revealed with 50% mixture of methanol, maximum values of thermal and exergy efficiencies are acquired with 50% butane-30%-toluene-20% hydrogen, 50% propane-20% methanol-30% hydrogen mixture provides minimum thermal efficiency, 50% propane-30% methanol-20% hydrogen mixture provides minimum exergy efficiency. The maximum NO is observed with 50% mixture of benzene. Minimum NO is acquired with 50% mixture of propane. The maximum values of power, thermal efficiency, exergy efficiency and NO formation have been obtained as 14.16 kW, 34.37%, 33.49% and 5.78E-7 mol/cm^3 respectively. Their minimum values are 6.69 kW, 28.01%, 27.54% and 3.61E-9 mol/cm^3, respectively. The results revealed that ternary fuel mixtures considerably affect the performance specifications and NO releasement of the SI engine. An Artificial Neural Network (ANN) model of the engine is constructed for a wider view. The results of the presented study can be used to assess the effects of ternary fuel mixtures on the performance characteristics and NO formation of an SI engine.

摘要

本研究报告了由液化丙烷-丁烷-氢作为添加剂和甲醇、乙醇、异辛烷、己烷、苯、甲苯和汽油作为主要燃料组成的三元燃料混合物对功率变化、热效率等性能规格的影响, 火花点火 (SI) 发动机的火用效率和 NO 使用燃烧模型。一种气体燃料的质量比保持在50%不变，其他两种气体燃料的质量比为10%～50%。向混合物中添加氢以抛物线方式影响性能特征的变化。然而，它们受到丙烷和丁烷添加的线性影响。性能特性的增减趋势随液体燃料种类而变化。使用 50% 的甲苯混合物观察到最大功率输出，使用 50% 甲醇混合物显示最小功率输出，使用 50% 丁烷-30%-甲苯-20% 氢气、50% 丙烷获得热效率和火用效率的最大值-20% 甲醇-30% 氢气混合物提供最低热效率，50% 丙烷-30% 甲醇-20% 氢气混合物提供最低火用效率。在 50% 的苯混合物中观察到最大 NO。用 50% 的丙烷混合物获得最低 NO。功率、热效率、火用效率和NO生成的最大值分别为14.16 kW、34.37%、33.49%和5.78E-7 mol/cm^3。它们的最小值分别为 6.69 kW、28.01%、27.54% 和 3.61E-9 mol/cm^3。结果表明，三元燃料混合物显着影响 SI 发动机的性能规格和 NO 释放。构建了发动机的人工神经网络 (ANN) 模型，以获得更广阔的视野。所提出的研究结果可用于评估三元燃料混合物对 SI 发动机的性能特征和 NO 形成的影响。