A COMPARATIVE STUDY OF GASOLINE AND CNG, AS A POTENTIAL FUEL IN KOREA

Bhupendra Singh Chauhan,Haeng Muk Cho 대한기계학회 2008 대한기계학회 춘추학술대회 Vol.2008 No.11

Gasoline engine have proved its utility in light, medium and heavy duty vehicle in every sector of the world community. The concern about long term availability of petroleum and the increasing threat for the environment by the increasing load of vehicular emission, compel the technology to upgrade itself for meeting the challenges. CNG is environmentally clean alternative to the existing SI Engines with out much change in the hardware. Many researchers have found this as a potential substitute to meet the energy requirement. Higher octane number and higher self ignition temperature make it a good gaseous fuel. Although power output is slightly lesser than the gasoline it’s thermal efficiency is better than the gasoline for the same SI Engine. Results showed that reduced CO, hydrocarbon emissions is a favorable outcome, with slight increase in NO<SUB>x</SUB> emission when compared with gasoline fuel to dual fuel mode in the existing SI Engines.

The Performance and Emissions Analysis of a Multi Cylinder Spark Ignition Engine with Gasoline LPG & CNG

Bhupendra Singh Chauhan,Haeng Muk Cho 한국가스학회 2011 한국가스학회지 Vol.15 No.4

The introduction of alternative fuels is beneficial to overcome the fuel shortage and reduce engine exhaust emissions. LPG and CNG are relatively clean fuel and considered as most promising alternative automotive fuels worldwide because of its emission reduction potential and lower fuel price compared to gasoline. Now a day’s adaptation of dual fuel approach is the growing as common trend. The two fuels can be successfully implemented with existing gasoline engine with little modification. The present study was done to analyze the performance and emissions analysis of a multi cylinder spark ignition engine fuelled with the benefits of CNG and LPG aseffective alternate automotive fuels by simply using them in an unmodified petrol engine. The test results indicate, the energy content of CNG and LPG is the most limiting factor in acceptance for fuel economy and performance reasons. Thermal efficiency was high for CNG lowest for gasoline and LPG between the two. BSFC, CO and HC were low and NOx was high for CNG and low for gasoline, LPG lies between the two.

Performance and emission studies on an agriculture engine on neat Jatropha oil

Bhupendra Singh Chauhan,Naveen Kumar,조행묵 대한기계학회 2010 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.24 No.2

Diesel engines have proven their utility in the transportation, agriculture, and power sectors in India. They are also potential sources of decentralized energy generation for rural electrification. Concerns on the long-term availability of petroleum diesel and the stringent environmental norms have mandated the search for a renewable alternative to diesel fuel to address these problems. Vegetable oils have been considered good alternatives to diesel in the past couple of years. However, there are many issues related to the use of vegetable oils in diesel engine. Jatropha curcas has been promoted in India as a sustainable substitute to diesel fuel. This study aims to develop a dual fuel engine test rig for evaluating the potential suitability of Jatropha oil as diesel fuel and for determining the performance and emission characteristics of an engine with Jatropha oil. The experimental results suggest that engine performance using Jatropha oil is slightly inferior to that of diesel fuel. The thermal efficiency of the engine was lower, while the brake-specific fuel consumption was higher with Jatropha oil compared with diesel fuel. The levels of nitrogen oxides (NOx) from Jatropha oil during the entire duration of the experiment were lower than those of diesel fuel. The reduction of NOx was found to be an important characteristic of Jatropha oil as NOx emission is the most harmful gaseous emission from engines; as such, its reduction is always the goal of engine researchers and makers. During the entire experiment, carbon monoxide (CO), hydrocarbon (HC), and carbon dioxide (CO2) emissions in the case of using Jatropha oil were higher than when diesel fuel was used. The higher density and viscosity of Jatropha oil causes lower thermal efficiency and higher brakespecific fuel consumption. The performance and emission characteristics found in this study are significant for the study of replacing diesel fuel from fossils with Jatropha oil in rural India, where the availability of diesel has always been a problem.

Practice of diesel fuel blends using alternative fuels: A review

Chauhan, Bhupendra Singh,Singh, Ram Kripal,Cho, H.M.,Lim, H.C. Elsevier 2016 RENEWABLE & SUSTAINABLE ENERGY REVIEWS Vol.59 No.-

<P><B>Abstract</B></P> <P>In order to meet the growing global energy requirement, exhaustive research is carried to develop and to use variety of renewable fuels. Concerns on the long-term availability of petroleum diesel and the stringent environmental norms have mandated the search for a renewable alternative to diesel fuel to address these problems. Diesel engines have proven their utility in the transportation, agriculture, and power sectors for small energy needs as a potential source of decentralized energy generation for electrification. Mixing of diesel fuel with biodiesel has been considered as good alternative to diesel in the past couple of years. The objective of the present study is to compare the performance, emissions and combustion characteristics of blended fuels in the unmodified diesel engine. Differences in the fuel properties of non-edible vegetable oils, biodiesels and other diesel fuel blends are considered in this review. Various diesel fuel blends with di-ethyl ether, ethyl-tert-butyl ether, mono-ethylene glycol ethyl ether, mono-ethylene glycol butyl ether, diethylene glycol ethyl ether, cottonseed oil, jatropha oil, karanja oil, mahua oil, linseed oil, rubber seed oil, neem oil, cashew nut shell oil, marine gas oil, fish oil, were used in diesel engine operation and their results were analyzed. It is clear from this review that all the blends studied generally causes an increase in NO<I>x</I> emission and a decrease in HC, CO and PM emissions compared to diesel. Biodiesel blended fuel shows lower brake thermal efficiency and slight increase in its brake specific fuel consumption compared to conventional diesel for the same energy output. Result of combustion and performance characteristics shows that biodiesels from different origin and its blends with diesel at 10–20% is better than higher blends. Thus, biodiesel could be a potential fuel for diesel engine and play a vital role in the near future especially for small and medium energy requirements. Hence, use of 10% to 20% blend of biodiesel is favorable for long term application in diesel engines, considering performance and emissions characteristics which are close to mineral diesel.</P>

A Study on Experiment of CNG as a Clean Fuel for Automobiles in Korea

Bhupendra Singh Chauhan,Haeng Muk Cho 한국대기환경학회 2010 한국대기환경학회지 Vol.26 No.5

The Performance and Emissions Analysis of a Multi Cylinder Spark Ignition Engine with Gasoline LPG & CNG

Chauhan, Bhupendra Singh,Cho, Haeng-Muk The Korean Institute of GAS 2011 한국가스학회지 Vol.15 No.4

The introduction of alternative fuels is beneficial to overcome the fuel shortage and reduce engine exhaust emissions. LPG and CNG are relatively clean fuel and considered as most promising alternative automotive fuels worldwide because of its emission reduction potential and lower fuel price compared to gasoline. Now a day’s adaptation of dual fuel approach is the growing as common trend. The two fuels can be successfully implemented with existing gasoline engine with little modification. The present study was done to analyze the performance and emissions analysis of a multi cylinder spark ignition engine fuelled with the benefits of CNG and LPG aseffective alternate automotive fuels by simply using them in an unmodified petrol engine. The test results indicate, the energy content of CNG and LPG is the most limiting factor in acceptance for fuel economy and performance reasons. Thermal efficiency was high for CNG lowest for gasoline and LPG between the two. BSFC, CO and HC were low and NOx was high for CNG and low for gasoline, LPG lies between the two.

Temperature transients of piston of a Camless S.I Engine using different combustion boundary condition treatments

KanwarJabar Singh Gill,Khushpreet Singh,H.M. Cho,Bhupendra Singh Chauhan 한국에너지학회 2014 에너지공학 Vol.23 No.3

Temperature transients of piston of a Camless S.I Engine using different combustion boundary condition treatments

Gill, KanwarJabar Singh,Singh, Khushpreet,Cho, H.M.,Chauhan, Bhupendra Singh The Korean Society for Energy 2014 에너지공학 Vol.23 No.3

Simplified finite element model of spark ignition (SI) engine to analyse combustion heat transfer is presented. The model was discredited with 3D thermal elements of global length 5 mm. The fuel type is petrol. Internal nodal temperature of cylinder body is defined as 21000C to represent occurrence of gasoline combustion. Material information and isotropic material properties are taken from published report. The heat transfer analysis is done for the instant of combustion. The model is validated by comparing the computed maximum temperature at the piston surface with the published result. The computed temperature gradient at the crucial parts are plotted and discussed. It has been found that the critical top surface suffered from thermal and the materials used to construct the engine parts strongly influenced the temperature distribution in the engine. The model is capable to analyze heat transfer in the engine reasonably and efficiently.

Temperature transients of piston of a Camless S.I Engine using different combustion boundary condition treatments

조행묵,KanwarJabar Singh Gill,Khushpreet Singh,Bhupendra Singh Chauhan 한국에너지학회 2014 에너지공학 Vol.23 No.3

Simplified finite element model of spark ignition (SI) engine to analyse combustion heat transfer is presented. The model was discredited with 3D thermal elements of global length 5 mm. The fuel type is petrol. Internal nodal temperature of cylinder body is defined as 21000C to represent occurrence of gasoline combustion. Material information and isotropic material properties are taken from published report. The heat transfer analysis is done for the instant of combustion. The model is validated by comparing the computed maximum temperature at the piston surface with the published result. The computed temperature gradient at the crucial parts are plotted and discussed. It has been found that the critical top surface suffered from thermal and the materials used to construct the engine parts strongly influenced the temperature distribution in the engine. The model is capable to analyze heat transfer in the engine reasonably and efficiently.

한국의 잠재적인 연료인 CNG연료의 성능 및 배출물에 관한 연구

조행묵(Haeng Muk Cho),Bhupendra Singh Chauhan 한국가스학회 2009 한국가스학회지 Vol.13 No.6

가솔린 엔진은 전 세계적으로 중소형 및 대형차 등 전반적으로 사용되고 있으며, 장기적으로 차량 부하에 따른 배기가스의 증가가 주변 환경에 대한 위협이 가중되고 있어 여기에 대한 대처가 필요하다. CNG엔진은 기존의 가솔린 SI 엔진에 비하여 유해 배출가스 농도가 적어 다른 연료에 비해여 청정연료로서 유리하며, 많은 관련 연구자들이 여기에 대한 여러 논문을 통하여 잠재적 청정연료로서 확인되었다. 출력과 열효율의 측면에서 약간 가솔린 연료에 비하여 떨어지지만 일산화탄소와 탄화수소 배출량은 유리하며, 질소산화물은 약간 증가하는 현상이 나타났다. 본 논문에서는 기존 가솔린엔진과 CNG엔진의 배출물을 비교 검토하였다. Gasoline engine have proved its utility in light, medium and heavy duty vehicle in every sector of the world community. The concern about long term availability of petroleum and the increasing threat for the environment by the increasing load of vehicular emission, compel the technology to upgrade itself for meeting the challenges. CNG is environmentally clean alternative to the existing SI Engines with out much change in the hardware. Many researchers have found this as a potential substitute to meet the energy requirement. Higher octane number and higher self ignition temperature make it a good gaseous fuel. Although power output is slightly lesser than the gasoline it’s thermal efficiency is better than the gasoline for the same SI Engine. Results showed that reduced CO, hydrocarbon emissions is a favorable outcome, with slight increase in NOx emission when compared with gasoline fuel to dual fuel mode in the existing SI Engines.