scholarly journals Computer Simulation to Optimize the VFA Alpha Prototype with a Hydraulic Piston Compressor and an Integrated Booster

2020 ◽  
Vol 57 (5) ◽  
pp. 5-17
Author(s):  
A. Mezulis ◽  
A. Safronov ◽  
J. Guzeyeva ◽  
J. Begens
Keyword(s):  
Computer Simulation ◽  
Natural Gas ◽  
Gas Dynamics ◽  
Piston Compressor ◽  
Alternative Fuel ◽  
Compressed Natural Gas

AbstractNatural gas, including biomethane, is a sustainable alternative fuel. Widening compressed natural gas applications by now is restricted by weakly developed infrastructure. Hygen Ltd. works on “hydraulic piston” technology for natural gas and biomethane compressing, storing, delivering and discharging the storage cylinders by means of an innovative hydraulic boosting technology. Designing of the Vehicle Fuelling Appliance (VFA) demands to take into account thermodynamics and gas dynamics properties at fluid compression and motion. The present paper deals with theoretical characteristics and their link to test measurements regarding a particular VFA HYGEN+ Alpha prototype manufactured by Hygen Ltd.

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

2014 ◽  
Vol 699 ◽  
pp. 702-707
Author(s):  
Ahmad Jais Alimin ◽  
Muhammad Yusri Ismail ◽  
Shahrul Azmir Osman
Keyword(s):  
Natural Gas ◽  
Alternative Fuel ◽  
Simulation Software ◽  
Compressed Natural Gas ◽  
Operational Conditions ◽  
Performance And Emissions ◽  
Power Models ◽  
Cng Engine ◽  
Experimental Process ◽  
Dimensional Simulation

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 (NOX) and carbon dioxides (CO2) 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.

Comparative assessment of engine vibration, combustion, performance and emission characteristics between single and twin-cylinder diesel engines in unifuel and dual-fuel mode

2021 ◽  
pp. 1-39
Author(s):  
Akash Chandrabhan Chandekar ◽  
Sushmita Deka ◽  
Biplab K. Debnath ◽  
Ramesh Babu Pallekonda
Keyword(s):  
Natural Gas ◽  
Alternative Fuels ◽  
Load Condition ◽  
Alternative Fuel ◽  
Dual Fuel ◽  
Cylinder Pressure ◽  
Compressed Natural Gas ◽  
Single Cylinder ◽  
Engine Vibration ◽  
Single Cylinder Engine

Abstract The persistent efforts among the researchers are being done to reduce emissions by the exploration of different alternative fuels. The application of alternative fuel is also found to influence engine vibration. The present study explores the potential connection between the change of the engine operating parameters and the engine vibration pattern. The objective is to analyse the effect of alternative fuel on engine vibration and performance. The experiments are performed on two different engines of single cylinder and twin-cylinder variants at the load range of 0 to 34Nm, with steps of 6.8Nm and at the constant speed of 1500rpm. The single cylinder engine, fuelled with only diesel mode, is tested at two compression ratios of 16.5 and 17.5. While, the twin-cylinder engine with a constant compression ratio of 16.5, is tested at both diesel unifuel and diesel-compressed natural gas dual-fuel modes. Further, in dual-fuel mode, tests are conducted with compressed natural gas substitutions of 40%, 60% and 80% for given loads and speed. The engine vibration signatures are measured in terms of root mean square acceleration, representing the amplitude of vibration. The combustion parameters considered are cylinder pressure, rate of pressure rise, heat release rate and ignition delay. At higher loads, the vibration amplitude increases along with the cylinder pressure. The maximum peak cylinder pressure of 95bar is found in the case of the single cylinder engine at the highest load condition that also produced a peak vibration of 3219m/s2.

The Potential for the Use of Natural Gas and Propane As Alternative Fuels in the Marine Industry

2013 ◽  
Author(s):  
Par Neiburger
Keyword(s):  
Diesel Engine ◽  
Natural Gas ◽  
Alternative Fuels ◽  
Alternative Fuel ◽  
Liquefied Natural Gas ◽  
Road Vehicles ◽  
Compressed Natural Gas ◽  
Gaseous Fuels ◽  
Diesel Vehicles ◽  
Marine Industry

Liberator Engine Company, LLC designs, develops and produces alternative fuel engines for vehicles around the globe. The Company’s 6.0 Liter Liberator™ gaseous fuels engine will have the ability to operate on Compressed Natural Gas, Liquefied Natural Gas or Liquid Propane Gas: clean, domestic, economical fuels. The Liberator engine will target OEM on road vehicles, as well as off road applications. The Liberator engine is also an excellent choice for the repower of existing diesel vehicles. The 6.0L Liberator™ engine will serve as a replacement engine for vehicle currently operating on a Cummins 5.9L diesel engine or Mercedes diesel 6.0L engine. Paper published with permission.

scholarly journals Driver Use and Perceptions of Refueling Stations Near Freeways in a Developing Infrastructure for Alternative Fuel Vehicles

2018 ◽  
Vol 7 (11) ◽  
pp. 242 ◽  
Author(s):  
Scott Kelley
Keyword(s):  
Los Angeles ◽  
Natural Gas ◽  
Metropolitan Area ◽  
Urban Areas ◽  
Alternative Fuel ◽  
Fuel Tank ◽  
Alternative Fuel Vehicles ◽  
Compressed Natural Gas ◽  
Travel Survey ◽  
Station Location

There is growing agreement that refueling station location plans that aim to encourage public adoption of alternative fuel vehicles (AFVs) should include sites near freeways in urban areas. Little is known, though, about the refueling behavior of early AFV adopters in these locations, which can involve travel on complex and congested roadways. To address this, an intercept travel survey collected data from 158 drivers of compressed natural gas (CNG) vehicles who refueled at CNG stations near freeways in greater Los Angeles, California. Results show that these stations met refueling demand from across the majority of the metropolitan area, and the distribution of local and distant refueling demand was consistent except for the downtown station. Drivers also considered these stations to be safe and accessible. Nearly half of drivers did not include another local stop in conjunction with their refueling trip that required leaving and returning to the freeway. These respondents refueled on longer trips with lower fuel tank levels, while refueling at the station that minimized deviation. Refueling downtown negatively influenced refueling in this manner. These findings should be considered when recommending station sites near freeways in future AFV infrastructure plans.

scholarly journals Compressed Natural Gas: The new alternative fuel for the Algerian transportation sector

2012 ◽  
Vol 33 ◽  
pp. 102-110 ◽  
Author(s):  
Fethia Amrouche ◽  
Ahmed Benzaoui ◽  
Farid Harouadi ◽  
Bouziane Mahmah ◽  
Maiouf Belhamel
Keyword(s):  
Natural Gas ◽  
Alternative Fuel ◽  
Compressed Natural Gas ◽  
Transportation Sector

scholarly journals The Comparative Study on Compressed Natural Gas (CNG) and Compressed Biomethane Gas (CBG) Fueled in a Spark Ignition Engine

2021 ◽  
Vol 302 ◽  
pp. 01005
Author(s):  
Tanat Limpachoti ◽  
Kampanart Theinnoi
Keyword(s):  
Natural Gas ◽  
Engine Performance ◽  
Maximum Load ◽  
Alternative Fuel ◽  
Spark Ignition ◽  
Spark Ignition Engine ◽  
Exhaust Emission ◽  
Compressed Natural Gas ◽  
Good Opportunity ◽  
Exhaust Gas Emission

Compressed biomethane gas (CBG) is an interesting alternative fuel that can be used to solve fossil fuel crisis problems. Nevertheless, it is concerned about engine performance and exhaust gas emission. In additions, CBG can be produced from agricultural harvesting residues and the food industry that is a good opportunity for utilizing biogas as a vehicle fuel. The aims of this research are comparative analysis of the engine performance and exhaust emission on a CBG and compressed natural gas (CNG) fuelled in a spark ignition engine on engine performance and emissions. The engine has been modified to operate with both fuel gases under constant engine load (50% maximum load) and engine speed (1500 - 3500 rpm). The results show that the engine operated with CBG has higher thermal efficiency with lower the nitrogen oxide (NOx) and hydrocarbon (HC) emissions compared with CNG. Thus, the CBG fuel can be used as an alternative fuel to substitute CNG fuel in the spark ignition engine. In additions, the results give the useful information for developed and optimised the engine operated with compression biogas to impact the higher demand of automotive fuels in the future.

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

2014 ◽  
Vol 660 ◽  
pp. 468-473 ◽  
Author(s):  
Ahmad Jais Alimin ◽  
Muhammad Yusri Ismail ◽  
Shahrul Azmir Osman
Keyword(s):  
Natural Gas ◽  
Alternative Fuel ◽  
Simulation Software ◽  
Compressed Natural Gas ◽  
Operational Conditions ◽  
Performance And Emissions ◽  
Power Models ◽  
Cng Engine ◽  
Experimental Process ◽  
Dimensional Simulation

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 (NOX) and carbon dioxides (CO2) 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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