F-T柴油对电控高压共轨柴油机性能及排放影响的研究

在满足国Ⅲ排放的现代高压共轨柴油机上,研究了掺烧不同比例F-T柴油混合燃料对发动机性能和排放的影响。结果表明,随着掺烧比例的加大,发动机的动力性略有下降,在外特性上,与燃烧国Ⅲ柴油相比,燃用F-T柴油时,扭矩最大下降2.2%,而燃油消耗率最高下降7.1%,有效热效率提高了4.5%。在十三工况的排放上,碳氢化合物（HC）、氮氧化物（NO_{x）、一氧化碳（CO）和颗粒（PM）的比排放量较国Ⅲ柴油均有明星下降,其中尤以燃用F-T柴油下降的幅度最大,PM降低了25.5%、NOx降低了11.7%、HC降低了39.3%、CO降低了33.9%。F-T柴油是柴油机的优良替代燃料。}     

Combustion,performance and emission analysis of preheated KOME biodiesel as an alternate fuel for a diesel engine

Journal of Thermal Analysis and Calorimetry - In the present work, karanja oil methyl ester (KOME) biodiesel is used in a compression ignition engine to find an alternative to diesel. The use of...     

Modelling,performance improvement and emission reduction of large two-stroke diesel engine using multi-zone combustion model

Journal of Thermal Analysis and Calorimetry - The main energy source in marine industry is fossil fuel. Diesel engines are main power supply in sea transport at present times and will also be in...     

A comparative study of performance and emission characteristics of neat biodiesel operated diesel engine: a review

Journal of Thermal Analysis and Calorimetry - Environmental concern and fossil fuel depletion, researchers are forced to find alternate fuel lead to the internal combustion (IC) engines. One of the...     

Effect of varying biogas mass flow rate on performance and emission characteristics of a diesel engine fuelled with blends of n-butanol and diesel

Journal of Thermal Analysis and Calorimetry - Dwindling petroleum products and environment degradation, owing to the gases from the exhaust tailpipe of compression ignition engines, have obligated...     

F-T柴油在直喷式柴油机中燃烧与排放特性的研究

煤通过Fischer-Tropsch (F-T)合成可得到十六烷值高、硫和芳香烃质量分数极低的F-T柴油。研究分析了未作改动的单缸直喷式柴油机燃用F-T柴油时的燃烧和排放特性。结果表明,与燃用0号柴油相比,燃用F-T柴油时的滞燃期平均缩短18.7%,预混燃烧放热峰值降低26.8%,扩散燃烧放热峰值较高,燃烧持续期相当。燃用F-T柴油时的最高燃烧压力略低,最大压力升高率显著下降,机械损失和燃烧噪音较小,燃油消耗率和热效率都得到显著改善。燃用F-T柴油可同时降低CO、HC、NOx和炭烟排放,其中NOx和炭烟分别平均降低16.7%和40.3%。研究表明,F-T柴油是柴油机良好的清洁代用燃料。     

Numerical investigation of the effects of inlet valve closing temperature and exhaust gas recirculation on the performance and emissions of an RCCI engine

Journal of Thermal Analysis and Calorimetry - In this paper, the effects of inlet valve closing temperature (TIVC) and exhaust gas recirculation (EGR) on the emissions and the performance of a...     

乙醇/柴油混合燃料的相溶性及对发动机性能影响的研究

利用助溶剂解决乙醇/柴油的相溶性问题,讨论了混合燃料中乙醇和助溶剂添加量对相溶性的影响,并使用助溶剂体积分数为1.5%、乙醇体积分数分别为5%、10%、15%的混合燃料及 20号纯柴油（分别表示为E5、E10、E15和 E0）在发动机台架上进行了性能和排放试验。研究结果表明,柴油的烃组成是决定相分离温度的决定性因素;对全部测试油品,乙醇体积分数在10%、助溶剂添加体积分数为1.5%时,混合燃料相溶性较好。台架试验显示,随着混合燃料中乙醇掺烧比例的增加,发动机的燃油消耗率逐渐增加,而发动机的额定功率和最大扭矩逐渐降低,但最大扭矩降低的幅度较小;此外,随着乙醇掺烧比例的增加,CO比排放量减少,HC、NOx和PM的比排放量逐渐增加,但NOx和PM的比排放量增加幅度不大。10%体积分数的乙醇添加量是乙醇/柴油的最佳掺烧比。     

A new device for reducing diesel engine emissions: a preliminary investigation

A new catalytic converter is compose by a alloy noble metal supported on inert wool and located downstream to combustion chamber appears able to markedly reduce the content of toxic organics, fine particulates and CO emitted by a diesel engine equipped truck. By contrast, emissions of NOx and particulate n-alkanes remain unaltered or increase, according to the driving and operating conditions of the vehicle. Although this tesrs are preliminary the results obtained, however, suggest that the adoption of this device significantly reduce the health risk associated to fine aerosols and carcinogenic PAH. Exhaust concentrations of some unregulated species, e.g. volatile aldehydes, were lowered by the oxidising catalyzer.     

Impact of yttria stabilized zirconia coating on diesel engine performance and emission characteristics fuelled by lemon grass oil biofuel

Journal of Thermal Analysis and Calorimetry - The aim of present work is to improve the efficiency and reduce the harmful exhaust emissions from diesel engines. Neat lemongrass oil was selected as...     

Performance,emission, energy and exergy analyses of gasoline fumigated DI diesel engine

Journal of Thermal Analysis and Calorimetry - In this paper, the effect of gasoline fumigation on the performance, emission, energy and exergy balance of a direct injection diesel engine is...     

Experimental investigation on the effect of natural gas premixed ratio on combustion and emissions in an IDI engine

Journal of Thermal Analysis and Calorimetry - Usage of natural gas in an internal combustion engine that has different combustion technologies is considered a possible solution to reduce engine...     

Performance and emission characteristics of a diesel engine operating on safflower seed oil methyl ester

Applied Biochemistry and Biotechnology - This study focused on the evaluation and testing of safflower seed oil methyl ester as a diesel fuel alternative. The kinematic viscosity and ASTM fuel...     

The relation between dioxin concentration from exhaust gas of diesel engine and chlorine content

In this paper, an experiment has been used to study the effect of pyrolysis stage (from injection to combustion) to dioxin exhaust from diesel engine. The characteristics of diesel fuel pyrolysis have been applied in order to calculate the mean molecular weight in varied temperatures and measure the concentration of inorganic chlorine (HCl). On the other hand, measuring the chlorine content of these particles after diesel pyrolysis enables researchers to find out the pyrolysis temperature that has the lowest possibility to produce dioxin. Additionally, the post-pyrolysis carbon particle diameter has been observed through electronic microscope so as to evaluate the combustion condition of the combustion stage. Result from this study would be helpful for researchers to understand the probability of dioxin formation.     

The performance,emissions, and combustion characteristics of an unmodified diesel engine running on the ternary blends of pentanol/safflower oil biodiesel/diesel fuel

Journal of Thermal Analysis and Calorimetry - The objective of the present study is to scrutinize the influence of a binary blend of diesel–safflower oil biodiesel and ternary blends of...     

Experiment and simulation of environmental chamber performance for fuel cell vehicle engine system

Journal of Thermal Analysis and Calorimetry - Comprehensive performance experiments were carried out, and the thermodynamic temperature simulation model was established based on the independently...     

Experimental investigation and ANN modelling of the effects of diesel/gasoline premixing in a waste cooking oil-fuelled HCCI-DI engine

Journal of Thermal Analysis and Calorimetry - This paper intends to study the combustion, performance and emission characteristics of the HCCI-DI engine with waste cooking oil (WCO) biodiesel as...     

Numerical simulation of the infrared emission of interstellar dust

The emission of the unidentified infrared bands (UIBs) has been attributed to excitation of polycyclic aromatic hydrocarbons (PAHs) by absorption of single energetic photons. Williams and Leone (1995) showed experimentally that a molecule (naphtalene) is considerably perturbed in this process so that the usual simplifying (harmonic) assumptions and associated analytical treatment do not apply. On the other hand, the single photon mechanism cannot operate in the frequently encountered environments where the radiation field is not strong, or the UV photons not hard, enough. This paper explores the 'feasibility' of a chemiluminescent process instead, in such cases. In both photonic and chemical excitation, the problem of energy redistribution is better tackled numerically. Here, a state-of-the-art numerical code is used to simulate naphtalene, a hydrocarbon particle of 18 atoms (assumed for the present purposes to be roughly representative of the real carrier material) and its chemical reaction with an H atom, a species known to be most abundant everywhere in space. The chemical energy deposited thus excites the particle into a complicated state of vibration. The code thereupon follows the dynamics of all the atoms and calculates the electric charge distribution at every step, from which the electric dipole moment is derived as a function of time. The FFT of this finally gives the spectral density of vibrational energy, which is found to be very different from the absorption spectrum of the same particle and to consist of several bands of different and varying widths. This--one of our main results--is the evidence of mode interactions due to mode anharmonicity and coupling. The energetic efficiency of this emission process is high and was proven to be adequate for astrophysical purposes. Other properties of this mechanism are also shown to be in agreement with observations. The assumptions and weaknesses of the present theoretical and numerical treatments are discussed with a view to further research.     

Numerical simulation of dimethyl ether/natural gas blend fuel HCCI combustion to investigate the effects of operational parameters on combustion and emissions

Journal of Thermal Analysis and Calorimetry - Homogeneous charge compression ignition (HCCI) combustion phasing control is one of the most difficult challenges of operating this new concept of...     

Kinetic models of natural gas combustion in an internal combustion engine

In this study, combustion of methane was simulated using four kinetic models of methane in CHEMKIN 4.1.1 for 0-D closed internal combustion (IC) engine reactor. Two detailed (GRIMECH3.0 & UBC MECH2.0) and two reduced (One step & Four steps) models were examined for various IC engine designs. The detailed models (GRIMECH3.0, & UBC MECH2.0) and 4-step models successfully predicted the combustion while global model was unable to predict any combustion reaction. This study illustrated that the detailed model sh...