performance and emission characteristics of dual fuel engines at part loads using simultaneous effect of exhaust gas recirculation and pre-heating of in-let air

Authors

a. paykani

r. khoshbakhti saray

m. mohammadi kousha

t. shervani tabar

abstract

in this study, a numerical simulation using the cfd software, fluent, has been conducted to examine the effect of various shapes of the venturi component sections in order to find the optimum venturi specifications to increase the egr rate with minimum pressure loss at the part load operation range. the cfd results reveal that the venturi should be precisely optimized to introduce the required amount of egr to the engine manifold. then, the optimum venturi was manufactured, and it was installed on the engine intake system. by using the optimum venturi egr system instead of original system the 26% increase in egr flow rate to the engine manifold is observed. in the second part of the paper, an experimental investigation was carried out on a “lister 8-1” dual fuel (diesel – natural gas) engine to examine the simultaneous effect of inlet air pre-heating and egr on performance and emission characteristics of a dual fuel engine. the use of egr at high levels seems to be unable to improve the engine performance at part loads, however, it is shown that egr combined with pre-heating of inlet air can slightly increase thermal efficiency, resulting in reduced levels of both uhc and nox emissions. co and hc emissions were reduced by 24% and 31%, respectively. the nox emissions were decreased by 21% because of the lower combustion temperature due to the much inert gas brought by egr and decreased oxygen concentration in the cylinder.

Upgrade to premium to download articles

Sign up to access the full text

Already have an account?login

similar resources

Performance and Emission Characteristics of Dual Fuel Engines at Part Loads Using Simultaneous Effect of Exhaust Gas Recirculation and Pre-Heating of In-let Air

In this study, a numerical simulation using the CFD software, FLUENT, has been conducted to examine the effect of various shapes of the venturi component sections in order to find the optimum venturi specifications to increase the EGR rate with minimum pressure loss at the part load operation range. The CFD results reveal that the venturi should be precisely optimized to introduce the required ...

full text

Theoretical Investigation of Combustion Process in Dual Fuel Engines at Part Load Considering the Effect of Exhaust Gas Recirculation

The dual fuel engines at part loads inevitably suffer from lower thermal efficiency and higher carbon monoxide and unburned fuel emission. This work is carried out to investigate combustion characteristics of a dual fuel (dieselgas) engine at part loads, using a single zone combustion model with detailed chemical kinetics for combustion of natural gas fuel. The authors developed software in ...

full text

A New Strategy for Reduction of Emissions and Enhancement of Performance Characteristics of Dual Fuel Engines at Part Loads

Increasingly restrictive emission regulations and renewed focus on energy efficiency drive the current researches to find alternative fuels and their related better combustion strategies. In this regard, dual fuel engines, in which natural gas fuel is used as a main fuel and diesel fuel is employed as a pilot fuel, have received considerable attention. However, poor fuel utilization efficiencie...

full text

effect of bataine and sulphate supplement on wool and milk characteristics and lambs performance in naine ewes

تعداد 20 رأس میش نژاد نائینی 6+-24 ماهه، با میانگین وزن 2/3-+40 کیلوگرم، همراه با 20 رأس بره های آنها در قالب طرح کاملا تصادفی اثر بتائین و مکمل سولفات بر خصوصیات شیر و پشم و عملکرد بره ها بررسی شد. میش ها بطور تصادفی در چهار تیمار قرار گرفتند. تیمارها عبارت بودند از: 1-گروه شاهد 2-بتائین (05/0 درصد ماده خشک) 3-سولفات (24/0 سولفور درصد ماده خشک 4-بتائین هرماه با سولفات. جیره غذائی طبق nrc با مح...

15 صفحه اول

theoretical investigation of combustion process in dual fuel engines at part load considering the effect of exhaust gas recirculation

the dual fuel engines at part loads inevitably suffer from lower thermal efficiency and higher carbon monoxide and unburned fuel emission. this work is carried out to investigate combustion characteristics of a dual fuel (dieselgas) engine at part loads, using a single zone combustion model with detailed chemical kinetics for combustion of natural gas fuel. the authors developed software in whi...

full text

Enhancement of Combustion Process in Dual Fuel Engines at Part Loads by using Suitable Techniques

It is a well known fact that, dual fuel engines at part loads, inevitably suffer lower thermal efficiency, higher carbon monoxide and unburned fuel emission. The work in this paper is to investigate combustion characteristics of a dual fuel (diesel-gas) engine at part loads, using a single zone combustion model with detailed chemical kinetics for combustion of natural gas fuel. The authors deve...

full text

My Resources

Save resource for easier access later


Journal title:
international journal of automotive engineering

جلد ۱، شماره ۲، صفحات ۲۱-۲۵

Hosted on Doprax cloud platform doprax.com

copyright © 2015-2023