Accession Number : ADA293603

Title :   Experimental Design on Marine Exhaust Emissions.

Descriptive Note : Final rept.,

Corporate Author : MAR INC ROCKVILLE MD

Personal Author(s) : Goodwin, Michael J.

PDF Url : ADA293603

Report Date : JAN 1995

Pagination or Media Count : 97

Abstract : Important variables in the operation of internal combustion engines were identified, and statistically-designed experiments were developed to evaluate the multivariate interactions for both diesel and spark ignition engines. For the lab engines: the diesel design included use of dual fuels (natural gas in diesel fuel); the spark ignition engine included the use of propane as well as gasoline. Experiments conducted on the diesel engine showed reduced exhaust emissions at high levels of natural gas (80%), but only at reduced compression ratios. Still another design was developed for shipboard testing using portable emissions equipment. This design was applied to three 82' CG Cutters (WPBs) and their emissions measured according to ISO 8178 protocol. The results showed no significant difference based on depth between 30 and 120 feet. Carbon monoxide was reduced with increased engine load (e.g., higher speed, or towing), whereas the NOx output was fairly constant for a given shaft rpm. The NOx value levels off at about 10 g/kW-hr or 25 kg/tonne fuel; CO at about 2 g/kW-hr or 6 kg/tonne of fuel.

Descriptors :   *EMISSION, *FUELS, *CARBON MONOXIDE, *GASOLINE, *NATURAL GAS, *EXHAUST GASES, VELOCITY, PORTABLE EQUIPMENT, DIESEL ENGINES, INTERACTIONS, EXPERIMENTAL DESIGN, MULTIVARIATE ANALYSIS, DEPTH, REDUCTION, SHIPBOARD, ENGINES, LABORATORIES, DIESEL FUELS, PROPANE, INTERNAL COMBUSTION ENGINES, SEA TESTING, SPARK IGNITION ENGINES, COMPRESSION RATIO.

Subject Categories : Fuels
      Inorganic Chemistry
      Rocket Engines

Distribution Statement : APPROVED FOR PUBLIC RELEASE