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首页> 外文期刊>Energy Conversion & Management >Effects of aqueous carbon nanoparticles as a novel nanoadditive in water-emulsified diesel/biodiesel blends on performance and emissions parameters of a diesel engine
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Effects of aqueous carbon nanoparticles as a novel nanoadditive in water-emulsified diesel/biodiesel blends on performance and emissions parameters of a diesel engine

机译：水性碳纳米颗粒作为水乳化柴油/生物柴油混合物中新型纳米添加剂对柴油机性能和排放参数的影响

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Biodiesel utilization is associated with reduced calorific value and increased nitrogen oxides emissions. Hence, various strategies are implemented to address these challenges such as water addition into diesel/biodiesel fuel blends. In line with that, this study was undertaken to explore the effect of water (3 wt.%) and aqueous carbon nanoparticles (38, 75, and 150 mu M), as a novel fuel nanoadditive, on combustion and exhaust emissions of a diesel engine at a fixed engine speed of 1000 rev/min under four different engine loads ranging from 25% to 100% of full load conditions. Overall, the engine performance characteristics were improved by incorporating the aqueous carbon nanoparticles. In particular, the incorporation of carbon nanoparticles into water-emulsified biodiesel/diesel blends generally enhanced brake power and thermal efficiency while lowering specific fuel consumption. The most appealing performance features were observed for the emulsified fuel blend containing 38 mu M carbon nanoparticles which increased brake power and brake thermal efficiency by 1.07 kW and 11.58% at full load operation, respectively, while it led to decreased brake specific fuel consumption by about 107.3 g/kWh. The addition of carbon nanoparticles to the water-emulsified fuel blends adversely affected unburned hydrocarbons and carbon monoxide emissions at full load conditions owing to an increase in carbon content of the fuel blends but it lowered nitrogen oxides emissions. The addition of water deteriorated the economic features of the fuel blend (i.e., the cost per kWh of power generated). However, carbon nanoparticles addition into the water-emulsified fuel blend partially neutralized the adverse economic effects of water due to its positive impacts on thermal efficiency. Overall, water-emulsified diesel/biodiesel containing 38 mu M carbon nanoparticles could be regarded as the most promising emulsion fuel in terms of engine performance characteristics, nitrogen oxides emissions, as well as fuel economy.
机译：生物柴油的利用与降低的热值和增加的氮氧化物排放有关。因此，实施了各种策略来应对这些挑战，例如将水添加到柴油/生物柴油燃料混合物中。为此，本研究旨在探索水（3 wt。％）和水性碳纳米颗粒（38、75和150μM）作为新型燃料纳米添加剂对柴油燃烧和排放的影响。在全负荷工况的25％到100％的四种不同的发动机负荷下，发动机以固定的转速1000转/分钟运行。总体而言，通过掺入水性碳纳米颗粒改善了发动机性能特征。特别地，将碳纳米颗粒掺入水乳化的生物柴油/柴油共混物中通常增强了制动功率和热效率，同时降低了比燃料消耗。对于包含38μM碳纳米颗粒的乳化燃料混合物，观察到最吸引人的性能特征，在满负荷运行时，其制动功率和制动热效率分别提高了1.07 kW和11.58％，同时导致制动比燃料消耗降低了约107.3克/千瓦时。将碳纳米颗粒添加到水乳化的燃料混合物中，由于燃料混合物中碳含量的增加，在满负荷条件下会对未燃烧的碳氢化合物和一氧化碳的排放产生不利影响，但降低了氮氧化物的排放。加水恶化了燃料混合物的经济特性（即，每千瓦时发电的成本）。然而，由于水对热效率的积极影响，将碳纳米颗粒添加到水乳化的燃料混合物中可以部分抵消水的不利经济影响。总体而言，就发动机性能特性，氮氧化物排放以及燃油经济性而言，包含38μM碳纳米颗粒的水乳化柴油/生物柴油可被视为最有前途的乳化燃料。

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