Gasification of Diesel Fuel for a Low-Emission, High-Efficiency Engine System

1980 ◽  
Author(s):  
G. P. Purohit ◽  
John Houseman
Keyword(s):  
Diesel Fuel ◽  
High Efficiency ◽  
Low Emission ◽  
Engine System ◽  
Efficiency Engine

A phenomenological combustion analysis of a dual-fuel natural-gas diesel engine

2016 ◽  
Vol 231 (1) ◽  
pp. 66-83 ◽  
Author(s):  
Shuonan Xu ◽  
David Anderson ◽  
Mark Hoffman ◽  
Robert Prucka ◽  
Zoran Filipi
Keyword(s):  
Diesel Engine ◽  
Natural Gas ◽  
Heat Release ◽  
Diesel Fuel ◽  
Fuel Injection ◽  
Dual Fuel ◽  
Injection Timing ◽  
Heavy Duty ◽  
Engine System ◽  
Wiebe Function

Energy security concerns and an abundant supply of natural gas in the USA provide the impetus for engine designers to consider alternative gaseous fuels in the existing engines. The dual-fuel natural-gas diesel engine concept is attractive because of the minimal design changes, the ability to preserve a high compression ratio of the baseline diesel, and the lack of range anxiety. However, the increased complexity of a dual-fuel engine poses challenges, including the knock limit at a high load, the combustion instability at a low load, and the transient response of an engine with directly injected diesel fuel and port fuel injection of compressed natural gas upstream of the intake manifold. Predictive simulations of the complete engine system are an invaluable tool for investigations of these conditions and development of dual-fuel control strategies. This paper presents the development of a phenomenological combustion model of a heavy-duty dual-fuel engine, aided by insights from experimental data. Heat release analysis is carried out first, using the cylinder pressure data acquired with both diesel-only and dual-fuel (diesel and natural gas) combustion over a wide operating range. A diesel injection timing correlation based on the injector solenoid valve pulse widths is developed, enabling the diesel fuel start of injection to be detected without extra sensors on the fuel injection cam. The experimental heat release trends are obtained with a hybrid triple-Wiebe function for both diesel-only operation and dual-fuel operation. The ignition delay period of dual-fuel operation is examined and estimated with a predictive correlation using the concept of a pseudo-diesel equivalence ratio. A four-stage combustion mechanism is discussed, and it is shown that a triple-Wiebe function has the ability to represent all stages of dual-fuel combustion. This creates a critical building block for modeling a heavy-duty dual-fuel turbocharged engine system.

The Reheat Concept: The Proven Pathway to Ultra-Low Emissions and High Efficiency and Flexibility

2007 ◽  
Author(s):  
Felix Gu¨the ◽  
Jaan Hellat ◽  
Peter Flohr
Keyword(s):  
Power Generation ◽  
Gas Turbine ◽  
Flame Propagation ◽  
High Efficiency ◽  
Flame Stabilization ◽  
Auto Ignition ◽  
Fuel Flexibility ◽  
Stage Combustion ◽  
Low Emission ◽  
Key Topics

Reheat combustion has proven now in over 80 units to be a robust, and highly flexible gas turbine concept for power generation. This paper covers three key topics to explain the intrinsic advantage of reheat combustion to achieve ultra-low emission levels. First, the fundamental kinetic and thermodynamic emission advantage of reheat combustion is discussed analyzing in detail the emission levels of the first and second combustor stages, optimal firing temperatures for minimal emission levels, as well as benchmarking against single-stage combustion concepts. Secondly, the generic operational and fuel flexibility of the reheat system is emphasized, which is based on the presence of two fundamentally different flame stabilization mechanisms, namely flame propagation in the first combustor stage and auto-ignition in the second combustor stage. Finally, the present fleet status is reported by highlighting the latest combustor hardware upgrade and its emission performance.

Experimental study of a high-efficiency, low emission porous matrix combustor—heater

Fuel ◽  
1995 ◽  
Vol 74 (11) ◽  
pp. 1641-1647 ◽  
Author(s):  
Tian-Yu Xiong ◽  
Mark J. Khinkis ◽  
Ferol F. Fish
Keyword(s):  
Experimental Study ◽  
High Efficiency ◽  
Porous Matrix ◽  
Low Emission

Balancing Hydraulic Flow and Fuel Injection Parameters for Low-Emission and High-Efficiency Automotive Diesel Engines

2019 ◽  
Author(s):  
Gabriele Di Blasio ◽  
Carlo Beatrice ◽  
Roberto Ianniello ◽  
Francesco Concetto Pesce ◽  
Alberto Vassallo ◽  
...  
Keyword(s):  
Diesel Engines ◽  
High Efficiency ◽  
Fuel Injection ◽  
Hydraulic Flow ◽  
Injection Parameters ◽  
Low Emission
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