The Experts below are selected from a list of 33 Experts worldwide ranked by ideXlab platform

Abdullah Abdul Adam - One of the best experts on this subject based on the ideXlab platform.

  • A Study On Spray Characteristics Of Straight Vegetable Oil
    2010
    Co-Authors: Abdullah Abdul Adam
    Abstract:

    Biodiesel is considered a promising alternative fuel to reduce the dependent on fossil fuel without any major modification on existing engines system. Compared to diesel fuel, biodiesel has several superior combustion characteristics. It has the advantages of high biodegradability, excellent lubricity and no sulfur content. For example, when biodiesel is used inside the engine, approximately 10wt% of its oxygen content promote more complete combustion process and effectively reduce unburned hydrocarbons (UHC), carbon monoxide (CO) as well as suspended aerosol carbon granules. Although biodiesel has many advantages on the fuel properties, the fuel consumption rate or lower Horsepower Output are still need to be improved. This is due to the differences in fuel properties especially the kinematic viscosity between diesel fuel (GO), biodiesel fuel (BDF) and straight vegetable oil (SVO). In this study, the effect of kinematic viscosity of SVO on fuel injection spray characteristicare investigated using constant volume high pressure spray chamber.

Azran Zafri - One of the best experts on this subject based on the ideXlab platform.

  • Analysis of Straight Vegetable Oil (SVO) Spray Characteristics at End of Injection (EOI)
    'Engineering and Technology Publishing', 2012
    Co-Authors: Abdullah Adam, R. Mamat, Nur Atiqah Ramlan, Yoshiyuki Kidoguchi, Azran Zafri
    Abstract:

    The depletion source and the increasing demand of fossil fuel have prompted scientists and researchers to search new alternative fuels for diesel engine. Biodiesel is seen a promising alternative fuel to reduce dependent on conventional diesel fuel. Advantages of biodiesel compared to petroleum-based diesel include high biodegradability, excellent lubricity, higher flash point, no sulfur content and produces less air pollutants. Although biodiesel has many advantages on the fuel properties, the fuel consumption rate or lower Horsepower Output are still need to be improved. This is due to the differences in fuel properties especially the kinematic viscosity between diesel fuel (GO), biodiesel fuel (BDF) and straight vegetable oil (SVO). In this study, the effect of kinematic viscosity of SVO on the spray behavior at End of Injection (EOI) were investigated. High kinematic viscosity of fuel highly affects the spray characteristics at EOI. In additional, high injection pressure and high kinematic viscosity of SVO apply resistance at nozzle inner hole caused needle lift cannot completely close the nozzle at EOI signal. At the EOI in which the combustion temperature inside chamber reduces promptly, many fuel droplets could not undergo a complete atomization process especially for large size of diameter fuel droplets. This phenomenon result the development of carbon deposition around the nozzle tip area and it will cover the nozzle hole. The development of carbon deposition will affect the fuel flow from nozzle. This study indicates that fuel injection pressure show no effect on SVO spray characteristics at the end of injection. Furthermore, high ambient temperature spray will reduce the kinematic viscosity value of SVO and could improve SVO spray atomization at end of injection

Abdullah Adam - One of the best experts on this subject based on the ideXlab platform.

  • Analysis of Straight Vegetable Oil (SVO) Spray Characteristics at End of Injection (EOI)
    'Engineering and Technology Publishing', 2012
    Co-Authors: Abdullah Adam, R. Mamat, Nur Atiqah Ramlan, Yoshiyuki Kidoguchi, Azran Zafri
    Abstract:

    The depletion source and the increasing demand of fossil fuel have prompted scientists and researchers to search new alternative fuels for diesel engine. Biodiesel is seen a promising alternative fuel to reduce dependent on conventional diesel fuel. Advantages of biodiesel compared to petroleum-based diesel include high biodegradability, excellent lubricity, higher flash point, no sulfur content and produces less air pollutants. Although biodiesel has many advantages on the fuel properties, the fuel consumption rate or lower Horsepower Output are still need to be improved. This is due to the differences in fuel properties especially the kinematic viscosity between diesel fuel (GO), biodiesel fuel (BDF) and straight vegetable oil (SVO). In this study, the effect of kinematic viscosity of SVO on the spray behavior at End of Injection (EOI) were investigated. High kinematic viscosity of fuel highly affects the spray characteristics at EOI. In additional, high injection pressure and high kinematic viscosity of SVO apply resistance at nozzle inner hole caused needle lift cannot completely close the nozzle at EOI signal. At the EOI in which the combustion temperature inside chamber reduces promptly, many fuel droplets could not undergo a complete atomization process especially for large size of diameter fuel droplets. This phenomenon result the development of carbon deposition around the nozzle tip area and it will cover the nozzle hole. The development of carbon deposition will affect the fuel flow from nozzle. This study indicates that fuel injection pressure show no effect on SVO spray characteristics at the end of injection. Furthermore, high ambient temperature spray will reduce the kinematic viscosity value of SVO and could improve SVO spray atomization at end of injection

William L. Kranz - One of the best experts on this subject based on the ideXlab platform.

  • Energy Conservation through Improved Irrigation Pumping Plant Performance
    2009
    Co-Authors: William L. Kranz
    Abstract:

    (402) 584-3857 ABSTRACT. Nebraska has approximately 90,000 active irrigation wells that are powered by electric motors or gasoline, natural gas, propane or diesel fueled engines. Pumping plant performance data collected prior to 1990 indicated an average performance rating of 77 percent of the Nebraska Pumping Plant Performance Criteria (NPPPC). More recent tests confirm that pumping plant performance remains well below the Nebraska Criteria. Though significant improvement has been made in the brake Horsepower Output per unit of fuel for internal combustion engines, recent increases in fuel costs have more than doubled pumping costs during the past 3 years. Efficient irrigation pumping plants could save an average of 25-30 percent of the energy used to pump irrigation water through properly matching and adjusting the pump and motor to current operating conditions. Improvement in pumping plant performance will reduce peak electrical loads, and could potentially save irrigators 508 million kilowatt-hours or $40 million per year in energy costs based on electrical costs of $0.08 per kilowatt-hour.

Dickerson Heather - One of the best experts on this subject based on the ideXlab platform.

  • Comparison of Renting Training Aircraft Using Data Envelopment Analysis
    Virtual Commons - Bridgewater State University, 2016
    Co-Authors: Dickerson Heather
    Abstract:

    Many elements are involved when a pilot is trying to decide which aircraft to pursue for rental. Uninformed new pilots decide to rent purely based upon the aircraft used for initial training, but once more variables are considered, the pilot will realize such an important decision must consider all aspects. Cost typically being the greatest determining factor, Horsepower Output of the engine, speed, the maximum load capacity, and the maximum altitude the aircraft is able to reach also tend to have a large effect on determining which aircraft will suit the needs of the pilot. Data Envelopment Analysis was used to compare ten of the most common training and rental aircraft to determine which model was most efficient given the constraints listed above. This model can show even the newest pilot which aircraft should be chosen to rent based on a few of the most common variables in flying