Comparative engine performance and emission analysis of CNG and gasoline in a retrofitted car engine

Jahirul, M.I.; Masjuki, H.H.; Saidur, R.; Kalam, M.A.; Jayed, M.H.; Wazed, M. A.

doi:10.1016/j.applthermaleng.2010.05.037

Cited by 189 publications

(84 citation statements)

References 12 publications

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“…According to the test results, reduction in power using CNG can be seen, which could be explained by slower flame velocity and displacement of air by natural gas, which finally results in reduced CNG content due to the air volumetric efficiency and the charge energy density per injection [5]. This is a usually observed fact for CNG operation in engines designed for gasoline fuel use.…”

Section: Resultsmentioning

confidence: 94%

Ecological impact of CNG/gasoline bi-fuelled vehicles

Šmigins¹

2017

Engineering for Rural Development

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Abstract. The paper presents the results of an investigation carried on the potentiality of CNG as an alternative fuel for retrofitted gasoline engine analyzing its impact on exhaust gas emissions. In that case the results from emission testing of DACIA Logan on a chassis dynamometer MD-1750 are presented and discussed. The tests were realized at different testing conditions (idling, IM-240 cycle, 50 and 90 km·h -1 ) to see the influence on regulated and unregulated emissions. The analysis of the obtained experimental results has shown rapid increase of HC and NO x emissions and reduction of CO and CO 2 emissions, when fuelled with CNG compared to gasoline.Keywords: CNG, emissions, testing. IntroductionNowadays, the transport sector plays an important role in development of every country, but it also consumes significant amount of energy, being also the main source of environmental pollution. In the recent years, much more attention has been given to these problems, and new types of alternative fuels (bioethanol, biodiesel, etc.) are now offered. Some of these biofuels already occupy a definite share on the market, but it is still insufficient to overcome the problem of environmental pollution from transport and meet the EU Directives. Due to that now more attention is focused on three main energy sources for vehicles: electricity, hydrogen and natural gas promoting their development by the Directive 2014/94/EU, which requires the Member States to work on the development of a network of infrastructure allowing to use electricity, hydrogen and natural gas to powering the transport setting out minimum requirements for the building up infrastructure.One of the most promising alternatives is compressed natural gas (CNG), which could meet the stringent emission regulations in the EU. The technology for natural gas usage is well developed and equipment could be successfully installed on the used passenger vehicles. Currently, most of the largest vehicle manufacturers offer methane fuelled vehicles with the factory installed CNG fuelling system. Among them, some companies offer installation of this system on different types of motor vehicles. In that case also upgraded biogas or biomethane has great perspectives as the main component of it as also natural gas is methane. Fuels containing methane as the base component are well known due to rapid use in power generation, home heating, and now also in transport. Methane represents few major advantages over the conventional liquid fuels -it is a cheap source of energy and it has positive impact on some pollutants when used as a motor fuel.These facts could be observed in case of new commercialy produced vehicles, but not always in case of retrofitted CNG vehicles. One of the first researchers [1] in case of retroffited CNG vehicles confirmed reduction of CO emissions by 53 % and CO 2 emissions by 20 %, but increase of HC and NOx emissions by 162 % and 171 %, respectively. Besides that, the increase of the age of retrofitted CNG vehicle leaves an impact on the increase of ...

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Section: Resultsmentioning

confidence: 94%

Ecological impact of CNG/gasoline bi-fuelled vehicles

Šmigins¹

2017

Engineering for Rural Development

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“…In retrofitted spark ignition engine NO x is still the main fear due to the elevated production of exhaust gas temperature. However, retrofitted spark ignition is still low in CO, CO 2 , HC, etc and better fuel consumption with superior brake thermal efficiency compared to gasoline [4]. A new method to reduce NO x emission is through modification of fuel injection system by direct injection.…”

Section: Effects Of Cng On Engine Performance and Emissionmentioning

confidence: 99%

Predicting the Performance and Emissions Characteristics of a Medium Duty Engine Retrofitted with Compressed Natural Gas System Using 1-Dimensional Software

Alimin

Ismail

Osman

2014

AMM

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Abstract. The rise of crude oil price and the implications of exhaust emissions to the environment from combustion application call for a new reliable alternative fuel. A potential alternative fuel for compression ignition (C.I.) engine is the compressed natural gas (CNG). For C.I. engines to operate using CNG, or to be converted as a retrofitted CNG engine, further modifications are required. Previous works reported loss in brake power (BP) and increase in hydrocarbon (HC) emission for C.I. engine retrofitted with CNG fuelling. Verification of performance characteristics for CNG retrofitted engine through experimental analysis requires high cost and is very time consuming. Thus, a 1-Dimensional simulation software, GT-Power, was introduced in this study to reduce the experimental process and setup. A 4-cylinder medium duty C.I. engine (DE) and CNG retrofitted engine (RE) GT-Power models were used in this simulation work over various operational conditions: low, medium and high load conditions. As compared with DE model, results from RE model showed that RE model achieved an average 4.9% improvement for brake specific fuel consumption (BSFC) and loss in BP by 37.3%. For nitrogen oxides (NO X ) and carbon dioxides (CO 2 ) RE model predicted reduction of 48.1% (engine mode 1-9) and 33.4% (all engine modes), respectively. Moreover, RE produced 72.4% more carbon monoxide (CO) and 90.3% more HC emission.

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“…These issues have forced researchers to seek alternative carbon neutral transport fuels which promote sustainable development, energy efficiency and environmental preservation [6]. As of yet, few large scale commercially viable options exist for the transportation sector.…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, cars with no tailpipe greenhouse gas emissions (e.g., electric, solar, hydrogen) are a long way from being viable across the sector. Therefore, the development of sustainable long-term solutions using alternative fuels is essential [6,7].…”

Section: Introductionmentioning

confidence: 99%

The Use of Artificial Neural Networks for Identifying Sustainable Biodiesel Feedstocks

et al. 2013

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Abstract:Over the past few decades, biodiesel produced from oilseed crops and animal fat is receiving much attention as a renewable and sustainable alternative for automobile engine fuels, and particularly petroleum diesel. However, current biodiesel production is heavily dependent on edible oil feedstocks which are unlikely to be sustainable in the longer term due to the rising food prices and the concerns about automobile engine durability. Therefore, there is an urgent need for researchers to identify and develop sustainable biodiesel feedstocks which overcome the disadvantages of current ones. On the other hand, artificial neural network (ANN) modeling has been successfully used in recent years to gain new knowledge in various disciplines. The main goal of this article is to review recent literatures and assess the state of the art on the use of ANN as a modeling tool for future generation biodiesel feedstocks. Biodiesel feedstocks, production processes, chemical compositions, standards, physio-chemical properties and in-use performance are discussed. Limitations of current biodiesel feedstocks over future generation biodiesel feedstock have been identified. The application of ANN in modeling key biodiesel quality parameters and combustion performance in automobile engines is also discussed. This review has determined that ANN modeling has a high potential to contribute to the development of renewable energy systems by accelerating biodiesel research.

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Comparative engine performance and emission analysis of CNG and gasoline in a retrofitted car engine

Cited by 189 publications

References 12 publications

Ecological impact of CNG/gasoline bi-fuelled vehicles

Ecological impact of CNG/gasoline bi-fuelled vehicles

Predicting the Performance and Emissions Characteristics of a Medium Duty Engine Retrofitted with Compressed Natural Gas System Using 1-Dimensional Software

The Use of Artificial Neural Networks for Identifying Sustainable Biodiesel Feedstocks

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