Development of naval diesel engine duty cycles for air exhaust emission environmental impact analysis.

Download
Author
Markle, Stephen Paul.
Date
1994-05Advisor
Wong, Victor W.
Brown, Alan J.
Metadata
Show full item recordAbstract
A strategy for testing naval diesel engines for exhaust emissions was
developed. A survey of existing international and national standard diesel
engine duty cycles was conducted. All were found to be inadequate for testing
and certification of engine exhaust emissions from naval diesel powered ships.
Naval ship data covering 1 1 ,500 hours of engine operation of four U.S. Navy
LSD 41 Class amphibious ships was analyzed to develop a 27 point class
operating profile. A procedure combining ship hull form characteristics, ship
propulsion plant parameters, and ship operating profile was detailed to derive an
1 1 -Mode duty cycle representative for testing LSD 41 Class propulsion diesel
engines. A similar procedure was followed for ship service diesel engines.
Comparisons with industry accepted duty cycles were conducted using exhaust
emission contour plots for the Colt-Pielstick PC-4B diesel engines. Results
showed the 1 1 -Mode LSD 41 Class Duty Cycle best predicted ship propulsion
engine emissions compared to the 27 point operating profile propeller curve.
The procedure was applied to T-AO 187 Class with similar results. The
application of civilian industry standards to measure naval diesel ship propulsion
engine exhaust emissions was found to be inadequate. Engine exhaust flow
chemistry post turbocharger was investigated using the SANDIA Lab computer
tool CHEMKIN. Results showed oxidation and reduction reactions within
exhaust gases are quenched in the exhaust stack. Since the exhaust stream in
the stack is unreactive, emission sampling may be performed where most
convenient. A proposed emission measurement scheme for LSD 41 Class ships
was presented.
Rights
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.Collections
Related items
Showing items related by title, author, creator and subject.
-
Passive regeneration: long-term effects on ash characteristics and diesel particulate filter performance
Bahr, Michael J. (Monterey California. Naval Postgraduate School, 2013-06);Diesel particulate filters (DPF) have seen widespread growth as an effective means for meeting increasingly rigorous particle emissions regulations. There is growing interest to exploit passive regeneration of DPFs to ... -
EFFECTS OF AIR INLET SWIRL ANGLE ON PERFORMANCE OF A TWO-STROKE DIESEL ENGINE
Klein, Jordan A. (Monterey, CA; Naval Postgraduate School, 2018-06);Two-stroke diesel engines are a reliable, robust way to provide power in a multitude of naval applications, from electrical generators to construction equipment to marine propulsion. Improvement in the performance of such ... -
Modeling of engine parameters for condition-based maintenance of the MTU series 2000 diesel engine
Yue, Siew Peng (Monterey, California: Naval Postgraduate School, 2016-09);Condition-based maintenance (CBM) entails performing maintenance only when needed to save on resources and cost. Formulating a model that reflects the behavior of the marine diesel engine in its normal operating conditions ...