Evaluation of the Impact of Alternative Fuel Use on the Emissions and Performance of a Service-Exposed T56 Engine

2012 ◽  
Author(s):  
Jennifer L. Y. Chalmers ◽  
Craig R. Davison ◽  
Wajid Ali Chishty ◽  
Jeff W. Bird ◽  
Tak Chan ◽  
...  
Keyword(s):  
Health Assessment ◽  
Engine Performance ◽  
Alternative Fuel ◽  
Lessons Learned ◽  
Durability Test ◽  
Fuel Blend ◽  
Before And After ◽  
Performance And Emissions ◽  
Reduce Emissions ◽  
The Impact

Alternative fuel sources are becoming an operational reality; these fuels have the potential to reduce emissions, improve combustion characteristics and to increase fuel supply security. A test with a T56 turboprop engine was performed to demonstrate that a CHEFA/JP8 (Camelina Hydroprocessed Ester and Fatty Acids and standard JP8) fuel blend would meet operational requirements. The primary test objective was to assess whether a fuel change had an immediate impact on the engine condition, performance, emissions or vibration characteristics. This paper presents test results comparing engine performance with JP8 and a 50/50 blend of JP8 and CHEFA. Comparison runs were conducted before and after a 20 hour ground durability test with the CHEFA fuel blend. A nearly time-expired, nacelle-dressed T56 on an outdoor test stand was tested. The engine was equipped with minimally-intrusive non-standard pressure, temperature and emissions monitoring equipment, and a field vibration assessment suite in addition to the standard flight instrumentation. This paper discusses the test plan, data acquisition methods, results and data repeatability. The performance and emissions results are compared to the changes predicted theoretically from the fuel properties. Observations from the borescope inspections before, during and after the 20 hour durability test are also presented. The lessons learned in this test could be applied to future fuel or process-change tests, and the results provide a performance baseline for engine health assessment.

scholarly journals THE RESEARCH INTO THE INFLUENCE OF ECOLOGICAL PETROL ADDITIVES IN THE AUTOMOBILE LABORATORY

Transport ◽  
2004 ◽  
Vol 19 (1) ◽  
pp. 24-27 ◽  
Author(s):  
Algis Butkus ◽  
Saugirdas Pukalskas
Keyword(s):  
Engine Performance ◽  
Positive Influence ◽  
Pollutant Emission ◽  
Exhaust Emission ◽  
Chassis Dynamometer ◽  
Si Engine ◽  
Fuel Blend ◽  
Octane Rating ◽  
Reduce Emissions ◽  
The Eu

Looking forward to Lithuania becoming a member of the EU it is very important to use a larger amount of renewing fuel. Based on economic and environmental considerations in Lithuania, we are interested in studying the effects of ethanol contents in the blended ethanol‐petrol fuel on the engine performance and pollutant emission of SI engine. Therefore, we used engine test facilities to investigate the effects on the engine performance and pollutant emission of 3,5 % and 7,0 % ethanol in the fuel blend and special additives, which reduce emissions and increase octane rating. The tests were carried out in the laboratory on a chassis dynamometer with two different cars. The experiment results showed that ethanol used in a fuel blend with petrol had a positive influence on engine performance and exhaust emission.

DAMAGE ASSESSMENT IN COASTAL HABITATS: LESSONS LEARNED FROM EXXON VALDEZ

1993 ◽  
Vol 1993 (1) ◽  
pp. 695-697 ◽  
Author(s):  
Thomas A. Dean ◽  
Lyman McDonald ◽  
Michael S. Stekoll ◽  
Richard R. Rosenthal
Keyword(s):  
Optimal Design ◽  
Oil Spill ◽  
Damage Assessment ◽  
Oil Spills ◽  
Lessons Learned ◽  
Exxon Valdez ◽  
Before And After ◽  
And Control ◽  
Alternative Designs ◽  
The Impact

ABSTRACT This paper examines alternative designs for the monitoring and assessment of damages of environmental impacts such as oil spills. The optimal design requires sampling at pairs of impacted (oiled) and control (unoiled) sites both before and after the event. However, this design proved impractical in evaluating impacts of the Exxon Valdez oil spill on nearshore subtidal communities, and may be impractical for future monitoring. An alternative design is discussed in which sampling is conducted at pairs of control and impact sites only after the impact.

Impact of military JP-8 fuel on heavy-duty diesel engine performance and emissions

2007 ◽  
Vol 221 (8) ◽  
pp. 957-970 ◽  
Author(s):  
G Fernandes ◽  
J Fuschetto ◽  
Z Filipi ◽  
D Assanis ◽  
H McKee
Keyword(s):  
Particulate Matter ◽  
Diesel Engine ◽  
Fuel Economy ◽  
Engine Performance ◽  
Heavy Duty ◽  
Heavy Duty Diesel Engine ◽  
Performance And Emissions ◽  
Heavy Duty Diesel ◽  
Engine Performance And Emissions ◽  
The Impact

Investigating the impact of jet fuel on diesel engine performance and emissions is very important for military vehicles, due to the US Army Single Fuel Forward Policy mandating that deployed vehicles must refuel with aviation fuel JP-8. There is a known torque and fuel economy penalty associated with the operation of a diesel engine with JP-8 fuel, due to its lower density and viscosity. On the other hand, a few experimental studies have suggested that kerosene-based fuels have the potential for lowering exhaust emissions, especially particulate matter, compared to diesel fuel #2 (DF-2). However, studies so far have typically focused on quantifying the effects of simply replacing the regular DF-2 with JP-8, rather than fully investigating the reasons behind the observed differences. This research evaluates the effect of using JP-8 fuel in a heavy-duty diesel engine on fuel injection, combustion, performance, and emissions, and subsequently utilizes the obtained insight to propose changes to the engine calibration to mitigate the impact of the trade-offs. Experiments were carried out on a Detroit Diesel Corporation (DDC) S60 engine outfitted with exhaust gas recirculation (EGR). The results indicate that torque and fuel economy of diesel fuel can be matched, without smoke or NO x penalty, by increasing the duration of injection to compensate for the lower fuel density. The lower cetane number of JP-8 caused an increased ignition delay and increased premixed combustion, and their cumulative effect led to relatively unchanged combustion phasing. Under almost all conditions, JP-8 led to lower NO x and particulate matter (PM) emissions and shifted the NO x-PM trade-off favourably.

Thermodynamic Analysis of Ethanol-Diesel Oil and Waste Heat Recovery for Diesel Engines

2014 ◽  
Vol 1070-1072 ◽  
pp. 140-145
Author(s):  
Ming Yue He ◽  
Hong Tao Gao ◽  
Wang Liu
Keyword(s):  
Diesel Engine ◽  
Thermodynamic Analysis ◽  
Heat Recovery ◽  
Waste Heat Recovery ◽  
Waste Heat ◽  
Cooling Water ◽  
Engine Performance ◽  
Alternative Fuel ◽  
Diesel Oil ◽  
The Impact

In this paper, for the purpose of providing a scientific reference for saving energy and improving the efficiency of diesel engine, the impact of ethanol diesel-oil alternative fuel and waste heat recovery are investigated on the basis of thermodynamic analysis. The results illustrate that, after using ethanol diesel alternative fuel, engine performance parameters are of no big change, however, the exhaust emissions are significantly reduced; Recycling the energy contained in the exhaust gas and cooling water, can achieve the purpose of energy conservation and emissions reduction, beside improving the thermal efficiency and exergy efficiency of the diesel engine.

scholarly journals Transformation of the Tanzania Medical Store Department through Global Fund support: lessons learned from the field

2020 ◽  
Author(s):  
Patrick Githendu ◽  
Linden Morrison ◽  
Rosemary Silaa ◽  
Sai Pothapregada ◽  
Sarah Asiimwe ◽  
...  
Keyword(s):  
Global Fund ◽  
Interrupted Time Series ◽  
Lessons Learned ◽  
Interrupted Time Series Analysis ◽  
Monthly Basis ◽  
Quantitative And Qualitative Research ◽  
Before And After ◽  
Multi Stakeholder ◽  
Health Commodities ◽  
The Impact

AbstractBackgroundThe Tanzania government sought support from The Global Fund to Fight AIDs, Tuberculosis and Malaria (Global Fund) to reform its Medical Stores Department (MSD), with the aim of improving performance. Our study aimed to assess the impact of the reforms and document the lessons learned.MethodsWe applied quantitative and qualitative research methods to assess the impact of the reforms. The quantitative part entailed a review of operational and financial data covering the period before and after the implementation of the reforms. We applied interrupted time series analysis to determine the change in average availability of essential health commodities at health zones. Qualitative data was collected through 41 key informant interviews. Participants were identified through stakeholder mapping, purposive and snowballing sampling techniques, and responses were analyzed through thematic content analysis.ResultsAvailability of essential health commodities increased significantly by 12.6% (95%CI, 9.6-15.6), after the reforms and continued to increase on a monthly basis by 0.2% (95%CI, 0.0-0.3) relative to the preintervention trend. Sales increased by 56.6% while the cost of goods sold increased by 88.6% between 2014/15 and 2017/18. Surplus income increased by 56.4% between 2014/15 and 2017/18, with reductions in rent and fuel expenditure. There was consensus among participants that the reforms, were instrumental in improving performance of MSD.ConclusionMany positive results were realized through the reforms at MSD. However, despite the progress, there were risks such as the increasing government receivable that could jeopardize the gains. Multi-stakeholder efforts are necessary, to sustain the progress and expand public health.

Improving the performance of a diesel engine by changing injectors characteristics after reduction on the compression ratio

2021 ◽  
Vol 15 (2) ◽  
pp. 8153-8168
Author(s):  
Saeed Chamehsara ◽  
Mohammadreza Karami
Keyword(s):  
Internal Combustion Engines ◽  
Fuel Injection ◽  
Engine Performance ◽  
Combustion Engines ◽  
Fuel Injector ◽  
Start Time ◽  
Performance And Emissions ◽  
Nozzle Hole ◽  
The Impact

In order to repair internal combustion engines, sometimes it is necessary to replace the components of these engines with each other. Therefore changes in engine performance are inevitable in these conditions. In the present study, by changing the coneccting rod and the crank of the OM457 turbo diesel-fueled engine with the OM444, it was observed that the performance of the engine decreases. Numerical simulations have been carried out to study the Possible ways to mitigate this reduction. One way to achieve this goal is to change the fuel injector’s characteristics such as, fuel injector’s nozzle hole diameter, number of nozzle holes, and start time of fuel injection. In this study, the impact of these parameters on the performance and emissions of these engines were analyzed. Another scenario is an increase in inlet fuel and air by the same amount. The results indicate that By reducing the diameter of fuel injector holes and hole numbers, the performance of the engine was increased. on the other hand, the NOx emissions were increased while the amount of soot emission decreased. The same results were concluded by retarding the start time of injection. Subsequently, a case study of changing fuel injector parameters for mitigation of decreased performance was performed. These parameters were simultaneously applied, and results were compared. The performance of the engine with improved injector’s characteristics was close to the main OM457. Similar results were obtained by increasing the amount of inlet air and fuel.

Unjuk Kerja dan Emisi Gas Asap Genset Berbahan Bakar Biodiesel FAME

2019 ◽  
Vol 17 (3) ◽  
Author(s):  
Prawoto ◽  
Ihwan Haryono
Keyword(s):  
Performance Test ◽  
Acid Methyl Ester ◽  
Engine Performance ◽  
Load Test ◽  
National Standard ◽  
Variable Load ◽  
Durability Test ◽  
Exhaust Gas Emission ◽  
Before And After ◽  
Dummy Load

This paper describes performance and durability test results of three parallel stationary diesel engine using fatty acid methyl ester biodiesel blend fuel with composition B10 (10% biodiesel FAME), B15 (15% biodiesel FAME), and B0 (100% regular diesel fuel) as a baseline. Each engine was tested during 1000 hours. Performance and smoke test without generator was conducted on engine dynamometer before and after durability according to the National Standard of Indonesia. Performance test with variable load also conducted with generator attached using lamps as dummy load. Test result showed that all of three engines with difference fuel have relatively identical performance and not seen any significant decrease in performance during 1000 hour endurance test. Comparing to the B0, fuel consumption of B10 and B15 was higher in average of 1.4 % and 2.4 %, where are smoke emission decrease in order of 4.5% to 22.5%. For setting the engine at standard conditions, the best performance obtained for a mixture of 10% biodiesel (B10).Pada Makalah ini disampaikan hasil penelitian uji unjuk kerja dan ketahanan pada tiga mesin diesel stasioner (generator set) secara paralel dengan menggunakan bahan bakar campuran biodiesel-solar dengan komposisi B10 (10% biodiesel FAME), B15 (15% biodiesel FAME), dan B0 (100% solar) sebagai pembanding, masing-masing diuji selama 1000 jam. Uji unjuk kerja dan emisi gas asap mesin tanpa generator dilakukan pada engine dynamometer baik sebelum maupun sesudah uji ketahanan. Pengujian unjuk kerja dengan variasi beban dan generator terpasang juga dilakukan dengan menggunakan lampu sebagai beban. Hasil uji menunjukkan bahwa ketiga mesin dengan bahan bakar berbeda mempunyai unjuk kerja yang relatif identik dan tidak terlihat adanya penurunan unjuk kerja yang berarti selama uji ketahanan 1000 jam. Secara rata rata dibandingkan dengan B0, konsumsi bahan bakar Genset dengan B10 dan B15 lebih tinggi masing-masing sebesar 1,4 % dan 2,4 %, sedangkan emisi gas asap menurun antara 4,5 % sampai dengan 22,5 %.Untuk setting mesin pada kondisi standar, kinerja terbaik untuk campuran biodiesel 10% (B10).Keywords: Biodiesel, engine performance, durability, exhaust gas emission.

A Study on Performance and Emissions of a 4-Stroke IC Engine Operated on Landfill Gas With Syngas Addition

2010 ◽  
Author(s):  
Jechan Lee ◽  
Marco J. Castaldi
Keyword(s):  
Landfill Gas ◽  
Load Condition ◽  
Engine Performance ◽  
Fuel Mixture ◽  
Internal Combustion ◽  
Alternative Fuel ◽  
Nox Emissions ◽  
Ic Engine ◽  
Performance And Emissions ◽  
Electrical Loads

The aim of this study is to investigate the suitability of landfill gas (LFG) as an alternative fuel for an internal combustion (IC) engine and how to reduce pollutants emissions from LFG operations by adding syngas to LFG. The effect of CO2 fractions in LFG on the engine performance and exhaust emissions such as CO, UHC and NOx are experimentally determined, and a simulated LFG (50% CH4 and 50% CO2) mixed with a simulated syngas consisting of H2 and CO (H2/CO = 2) is also studied. The Honda GC160E engine connected with a small generator which functions as different electrical loads is used for this study. When CO2 fraction in LFG changes from 0% to 50% at 0.8 kW load condition, CO and UHC emissions increase from 241.8ppm to 802.1ppm and from 35.6ppm to 113.4ppm respectively, while NOx emission decreases from 126.7ppm to 99.8ppm. In case of LFG (50% CH4 and 50% CO2)-syngas (H2/CO = 2) mixtures, 5% addition of syngas to LFG at 0.8 kW load condition reduces CO, UHC and NOx emissions from 802.1ppm to 203.1ppm, from 113.4ppm to 11.1ppm and from 99.8ppm to 64.5ppm, respectively. However, when more syngas is added to LFG (10% and 15% syngas in fuel mixture) it does not measurably reduce these emissions any further.

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