Reduction of NOx Emissions by Water Injection in to the Inlet Manifold of a DI Diesel Engine

2003 ◽  
Author(s):  
R. Udayakumar ◽  
S. Sundaram ◽  
R. Sriram
Keyword(s):  
Diesel Engine ◽  
Water Injection ◽  
Nox Emissions ◽  
Di Diesel Engine ◽  
Reduction Of Nox ◽  
Inlet Manifold

Application of Diethyl Ether to Reduce Smoke and NOx Emissions Simultaneously With Diesel and Biodiesel Fueled Engines

2008 ◽  
Author(s):  
Masoud Iranmanesh ◽  
J. P. Subrahmanyam ◽  
M. K. G. Babu
Keyword(s):  
Diesel Engine ◽  
Emission Characteristics ◽  
Nox Emissions ◽  
Oxides Of Nitrogen ◽  
Heating Value ◽  
Simultaneous Reduction ◽  
Performance And Emission ◽  
Oxygenated Fuel ◽  
Di Diesel Engine ◽  
Biodiesel Blend

In this investigation, tests were conducted on a single cylinder DI diesel engine fueled with neat diesel and biodiesel as baseline fuel with addition of 5 to 20% DEE on a volume basis in steps of 5 vol.% as supplementary oxygenated fuel to analyze the simultaneous reduction of smoke and oxides of nitrogen. Some physicochemical properties of test fuels such as heating value, viscosity, specific gravity and distillation profile were also determined in accordance to the ASTM standards. The results obtained from the engine tests have shown a significant reduction in NOX emissions especially for biodiesel and a little decrease in smoke of DEE blends compared with baseline fuels. A global overview of the results has shown that the 5% DEE-Diesel fuel and 15% DEE-Biodiesel blend are the optimal blend based on performance and emission characteristics.

scholarly journals Development of a control-oriented model to optimise fuel consumption and NOX emissions in a DI Diesel engine

2014 ◽  
Vol 119 ◽  
pp. 405-416 ◽  
Author(s):  
S. Molina ◽  
C. Guardiola ◽  
J. Martín ◽  
D. García-Sarmiento
Keyword(s):  
Diesel Engine ◽  
Fuel Consumption ◽  
Nox Emissions ◽  
Di Diesel Engine ◽  
Optimise Fuel Consumption

scholarly journals Evaluation Dual Fuel Engine Fuelled With Hydrogen and Biogas as Secondary Fuel

2019 ◽  
Vol 8 (2) ◽  
pp. 1902-1905
Keyword(s):  
Diesel Engine ◽  
Thermal Efficiency ◽  
Dominant Role ◽  
Single Mode ◽  
Dual Fuel ◽  
Nox Emissions ◽  
Brake Thermal Efficiency ◽  
Pilot Fuel ◽  
Present Context ◽  
Inlet Manifold

The present energy scenario hydrogen fuel plays a dominant role in the power generation. Due to its unique characteristics of an extensive range of flammability, high flame speed, and diffusivity. In this present investigation, the diesel engine is converted into dual-fuel mode devoid of major conversions of the engine. The tests are performed on a dual-fuel mode and investigated the efficiency, emissions, and combustion features of the diesel engine. In the present context, hydrogen and biogas are injected from the inlet manifold as subsidiary fuel and diesel are injected as pilot fuel. The gaseous fuel injected in two different flow rates they are, 3 litres per minute (lpm), and 4lpm. The results from the experimentation revealed that the diesel with 4 lpm of hydrogen shows the 31.11 % enhancement of brake thermal efficiency but it shows 4.14% higher NOX emissions when compared with the pure diesel. But it shows. At the same time diesel with 4 lpm of Biogas exhibits 15.90% enhancement of brake thermal efficiency and 8.96% decrease in the NOX emissions in contrast to that of the single-mode of fuel with diesel.

Detailed Evaluation of a New Semi-Empirical Two-Zone NOx Model by Application on Various Diesel Engine Configurations

2012 ◽  
Author(s):  
Stelios Provataris ◽  
Nicholas Savva ◽  
Dimitrios Hountalas
Keyword(s):  
Diesel Engine ◽  
Accurate Estimation ◽  
Operating Parameters ◽  
Nox Emissions ◽  
Heavy Duty ◽  
Nox Formation ◽  
Light Duty ◽  
Physically Based ◽  
Di Diesel Engine ◽  
Semi Empirical

Over a significant period of time, efforts have been made towards a valid and accurate estimation of DI diesel engine NOx emissions. Considering the fact that experiments have a high cost in both time and money, modelling approaches have been developed in an effort to overcome these issues. It is well known that accuracy in the prediction of NOx emissions lies specifically on the accurate estimation of local temperature and O2 histories inside the combustion chamber that govern NOx formation, fulfilled by an accurate estimation of the combustion mechanism. To account for the actual effect of parameters that control NOx formation and overcome inefficiencies introduced from existing purely empirical models or artificial neural networks, valid only on the combustion systems for which they were developed [1], an alternative solution is the introduction of physically based semi-empirical models. Towards this direction, in the present work is presented and evaluated a new modelling approach, based on the combustion rate obtained from the measured cylinder pressure trace using Heat Release Rate Analysis. The model used is a semi-empirical two-zone one which makes use of the estimated elementary fuel mass burnt at each crank angle interval. The combustion process is considered to be adiabatic, while chemical dissociation is also considered. With this approach, temperature distribution throughout the combustion chamber is considered for, together with its evolution during the engine cycle. In addition, O2 availability is also considered for through the calculated charge composition. The result is an extremely fast computational model, combining the advantages of both empirical and physically based ones. In the present work is given a detailed validation of the model, from its application on two different types of diesel engines: a heavy-duty DI diesel engine and a light-duty DI diesel engine with pilot fuel injection. A significant number of cases where tested for both engine configurations, considering different operation points and variation of operating parameters, such as rail pressure and EGR. The twelve points of the European Stationary Cycle (ESC) were covered for the case of the heavy duty DI diesel engine, whilst for the light-duty DI engine a total number of forty-six operating points was studied. For both engine configurations the model reveals a very good predictive ability, considering for the effect of all operating parameters examined on NOx emissions. However, there is potential for improvement and development on its physical base for even more accurate predictions. The merits of good accuracy in prediction trends with varying engine operating parameters — even without calibration — and low computational time establish a potential for model use in engine development, optimization studies and model based control applications.

Sign in / Sign up

Export Citation Format

Share Document