• Title, Summary, Keyword: Fuel Oil Consumption

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Performance Simulation for the Variation of Fuel Injection Nozzle Configurations in Medium Speed Diesel Engine (중형 디젤 엔진의 연료분사노즐 형상에 따른 성능 해석 연구)

  • Kim, Ki-Doo;Youn, Wook-Hyun;Kim, Byong-Seok;Ha, Ji-Soo;Ahn, Kwang-Hean;Kim, Ju-Tae
    • Journal of the Korean Society of Marine Engineering
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    • v.30 no.6
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    • pp.662-668
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    • 2006
  • The effects of fuel injection nozzle hole on the NOx emission and fuel oil consumption of medium speed diesel engine HYUNDAI HiMSEN 6H21/32 engine are investigated by engine performance simulation. The results of performance simulation are verified by experimental results of NOx omission fuel oil consumption, cylinder pressure, and heat release rate according to the variation of the number of fuel injection nozzle hole and engine load. The performance simulations are also carried out to optimize the fuel injection nozzle of 6H21/32 engine in respect to the NOx emission and fuel oil consumption. The engine performance measurements are performed to verify the results of performance simulation and to investigate the effects of fuel injection nozzle on engine performance. The results of measurement indicate that significant NOx reduction can be achieved with minimum deterioration in fuel oil consumption by optimizing the geometry of fuel injection nozzle on 6H21/32 engine.

Effect of Fuel Mixing Ratio on Fuel Consumption in a Oil Fired Power Plant (중유화력발전소에서 바이오연료 혼합연소가 연료소비량에 미치는 영향)

  • Hong, Sangpil;Yoo, Hoseon
    • Plant Journal
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    • v.12 no.3
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    • pp.39-45
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    • 2016
  • Each of fuel consumption per hour was measured at the 320 MW and 380 MW generator output while changing mixing ratio of bio fuel oil to 50%, 80% and 100%. Fuel consumption per hour was increased from 11.0% to 20.4% as mixing ratio of bio fuel oil was changed from 50% to 100% at the 320 MW generator output comparing with fuel consumption per hour in case of bunker-C oil single firing. Fuel consumption per hour was also increased from 12.0% to 21.1% as mixing ratio of bio fuel oil was changed from 50% to 100% at the generator output 380 MW. Furthermore, it was confirmed that plant efficiency was decreased as mixing ratio of bio fuel oil was increased from 50% to 100% as a result that plant efficiency was calculated using the measured fuel consumption per hour, the generator output and the gross heating value.

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Size and Shape Optimization of the Oil Pump for Fuel Consuming Reduction (엔진 연비 향상을 위한 오일펌프 사이즈/형상 최적화)

  • Jo, Sok-Hyun;Nam, Kyung-Woo
    • Transactions of the Korean Society of Automotive Engineers
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    • v.16 no.1
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    • pp.22-28
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    • 2008
  • Generally block imbedded type oil pump is adopted to make a small engine. In this paper 1D/3D numerical simulations were conducted to reduce energy consumption of the block imbedded type oil pump. At each stage of engine development we have estimated the oil flow rate and pressure to optimize oil pump sizes by using the 1D system analysis and then accomplished 3D CFD(Computational Fluid Dynamics) simulations to optimize oil pump shapes including inlet/outlet port. As a result, the energy consumption of oil pump has been reduced to nearly 27% and the engine fuel consumption to $1{\sim}1.5%$.

A Study on the Ship's Speed for Reducing the Fuel Oil Consumption in Actual Ships (선박의 연료소모량 절감을 위한 항해 속력에 관한 연구)

  • Kim, Soon-Kap;Lee, Yun-Sok;Kong, Gil-Young;Kim, Jong-Pil;Jung, Chang-Hyun
    • Journal of the Korean Society of Marine Environment & Safety
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    • v.18 no.1
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    • pp.41-47
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    • 2012
  • Recently, due to the rapid rise of the international oil price, the burden of fuel oil expense is relatively increasing in a ship. And the international restriction of the greenhouse gas which was generated from the burning of fuel oil is also rapidly strengthened. Therefore, to reduce the greenhouse gas and fuel oil consumption, many shipping company adopted the low speed navigation and it was focused on the improvement of fuel consumption efficiency and the usage of alternative energy in the marine engine development field. In this paper, the fuel oil consumption according to the ship's speed was measured in the actual seas and analyzed the shop test results in the shipyard and the ship navigation data from the abstract log. And then it was proposed that the ship's economic speed was 14~15kts and the optimum rpm was 140~150 in specific sea conditions.

An Experimental Study on Combustion Characteristics of Biodiesel Fuel in Marine Diesel Engine (선박디젤기관에서 바이오디젤연료의 연소특성에 대한 실험적 연구)

  • Cho, Sang-Gon
    • Journal of the Korea Society For Power System Engineering
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    • v.19 no.3
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    • pp.29-35
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    • 2015
  • Environmental pollution is produced by consumption of fossil fuel, therefore alternative fuels is interested for development of new energy resources and reduction of exhaust emissions for air pollution prevention. Biofuels are produced from new vegetable oil and animal fat, may be used as fuel without change of engine structure in diesel engine. In this paper, the test results on specific fuel consumption, combustion characteristics of neat diesel oil and biodiesel blends(10 vol.% biodiesel and 20 vol.% biodiesel) were presented using four stroke, direct injection diesel engine, especially this biodiesel was produced from biodiesel fuel at our laboratory by ourselves. This study showed that specific fuel consumption is increased slightly, on the other hand cylinder pressure, rate of pressure rise, rate of heat release and soot were decreased slightly in the case of biodiesel blends than neat diesel oil.

Study of HSDI Diesel Engine Development for Low Fuel Consumption (HSDI 디젤 엔진 연비 저감 개발에 대한 연구)

  • Chun, Je-Rok;Yu, Jun;Yoon, Kum-Jung
    • Transactions of the Korean Society of Automotive Engineers
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    • v.14 no.1
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    • pp.138-143
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    • 2006
  • Modification of injector, oil ring tension reduction and oil pump rotor re-matching with optimization of relevant engine control parameters could drive fuel consumption reduction of HSDI diesel engine. A 5 holes injector was replaced with a 6 holes with smaller nozzle hole diameter and 1.5 k factor, and evaluated in a view of fuel economy and emission trade-offs. With introducing smaller nozzle hole diameter injector, PM(Particulate Matter) was drastically decreased for low engine load and low engine rpm. Modification of oil pump and oil ring was to reduce mechanical friction and be proved to better fuel economy. Optimization of engine operating conditions was a great help for the low fuel consumption. Influence of the engine operating parameters· including pilot quantity, pilot interval, air mass and main injection timing on fuel economy, smoke and NOx has been evaluated with 14 points extracted from NEDC(New European Driving Cycle) cycle. The fuel consumption was proved to $7\%$ improvement on an engine bench and $3.7\%$ with a vehicle.

Effect of Ultrasonic Energy in the Engine using Diesel Fuel Blended Rape-seed Oil (유채혼합유를 사용하는 기관에서 초음파에너지의 영향)

  • Kwon, K.R.;Ko, K.N.
    • Journal of the Korea Society For Power System Engineering
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    • v.9 no.4
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    • pp.5-10
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    • 2005
  • The effect of ultrasonic energy for diesel fuel and blend oil has been revealed in this paper. The experimental setup consisted of a high speed diesel engine with 4 cylinder, dynamometer and ultrasonic fuel feeding system. Ultrasonic energy was added to diesel fuel and blend oil, which is a blend of diesel fuel and rape-seed oil. As engine speed was changed, engine torque and power, brake specific fuel consumption and thermal efficiency were measured in detail. As the results, by adding ultrasonic energy to diesel fuel and blend oil, the engine performance was improved in range of the experiment. The effect of improvement on brake specific fuel consumption and thermal efficiency for blend oil is higher than that for diesel fuel. When ultrasonic energy was added to diesel fuel or blend oil, a rise in engine torque for diesel fuel was higher than that for blend oil, but the effect of ultrasonic energy was small. From these results, it may be desirable to add ultrasonic energy to blend oil for the use of blend oil to diesel engine.

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Application of Main Engine Turbocharger Cut-Out System Onboard a Vessel (Main Engine Turbocharger Cut-Out System 실선 적용 사례)

  • Cho, In-Young;Lee, Dong-Yeub;Kim, Young-Keon
    • Special Issue of the Society of Naval Architects of Korea
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    • pp.36-38
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    • 2011
  • As the increase of the fuel oil price, the demand for saving of the ship running cost is growing. To meet the needs of the shipowners, the method for low load operation has been developed by engine licenser. As one of low load operation, the turbocharger cut-out system can be utilized flexibly both full and part load operation. It can be possible to optimize fuel consumption at both full and part load operation. Tests by engine licenser with 12K98MC engine have proven that the fuel oil consumption can be reduced approximately 5%. In this paper we will study the application of main engine turbocharger cut-out system onboard a vessel. One of four turbochargers with MAN Diesel & Turbo 12K98MC-C and 12K98ME-C engine is cut out with swing gate valve. The fuel oil consumption is measured during sea trial and engine shop test.

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Combustion Characteristics of a Direct Injection Agricultural Diesel Engine with Rapeseed Oil (유채유를 연료로 한 직접분사식 농용 디젤기관의 연소특성)

  • Choi, S.H.;Byeon, J.W.
    • Journal of Biosystems Engineering
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    • v.34 no.3
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    • pp.135-139
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    • 2009
  • Harmful exhaust emissions of diesel engines are recognized as main causes of air pollution in these days. But, the direct injection diesel engine is widely used for sake of minimization on energy consumption. Because biodiesel fuel is a renewable and alternative fuel for a diesel engine, its usability is expanded. To investigate the effect of biodiesel fuel(extracted from rapeseed oil) on the characteristics of performance and exhaust emissions in an agricultural diesel engine, the biodiesel fuel derived from rapeseed oil was applied in this study. Smoke emission of esterified rapeseed oil was reduced remarkably by approximately 44.5% at 1500 rpm, full load in comparison with the commercial diesel fuel. The power, torque and brake specific energy consumption of the diesel engine showed very slight differences. It was concluded that esterified rapeseed oil could be utilized effectively as an alternative and renewable fuel for agricultural direct injection diesel engines.

Effects of Biodiesel Fuel on Exhaust Emission Characteristics in Diesel Engine(Using Soybean Oil) (디젤기관에서 바이오디젤 연료가 배기배출물 특성에 미치는 영향(대두유를 중심으로))

  • Lim, Jae-Keun;Choi, Soon-Youl;Cho, Sang-Gon
    • Journal of the Korean Society of Marine Engineering
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    • v.32 no.1
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    • pp.27-32
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    • 2008
  • Recently, we have a lot of interest in alternative fuels to provide energy independence from oil producing country and to reduce exhaust emissions for air pollution prevention. Biodiesel, which can be generated from natural renewable sources such as new or used vegetable oils or animal fats, may be used as fuel in diesel engine of compression ignition engine. In this paper, the test results on specific fuel consumption and exhaust emissions of neat diesel oil and biodiesel blends(10 vol.% biodiesel and 20 vol.% biodiesel) were presented using four stroke, direct injection diesel engine, especially this biodisel was produced from soybean oil at our laboratory. This study showed that Soot and CO emission were decreased as the blending ratios of biodiesel to diesel oil increased, on the other hand NOx emission was slightly increased because of the oxygen content in biodiesel. Also, the biodiesel blends yielded slightly higher specific fuel consumption than that of diesel oil because of lower heating value of biodiesel.