Smoke emission reduction of marine diesel engines by leading part of the exhaust gas into diesel particulate filter during transient loading

Papoulias, Fotis; Παπούλιας, Φώτης

dc.contributor.author	Papoulias, Fotis	en
dc.contributor.author	Παπούλιας, Φώτης	el
dc.date.accessioned	2014-10-21T08:57:05Z
dc.date.available	2016-02-08T12:26:35Z
dc.date.issued	2014-10-21
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/39280
dc.identifier.uri	http://dx.doi.org/10.26240/heal.ntua.10303
dc.rights	Default License
dc.subject	DPF	en
dc.subject	Particulate filter	en
dc.subject	PM	en
dc.subject	Soot	en
dc.subject	Smoke	en
dc.subject	Particulate matter	en
dc.title	Smoke emission reduction of marine diesel engines by leading part of the exhaust gas into diesel particulate filter during transient loading	en
heal.type	bachelorThesis
heal.classification	Marine Engineering	en
heal.language	en
heal.access	free	el
heal.recordProvider	ntua	el
heal.publicationDate	2014-10-09
heal.abstract	Potential reduction of smoke emission of marine diesel engines is investigated through the installation of an exhaust bypass system featuring two diesel particulate filters in the Laboratory of Marine Engineering of the National Technical University of Athens. This system differs from the ones already in use in the automotive industry because it charges only during engine transient loading in order to avoid early filter contamination. The exhaust flow is controlled by the operation of two butterfly valves. When the engine is idle or operating in steady state the first valve is fully open and the exhaust gas flows through the main duct unfiltered. In case of engine transient loading, during which there is high smoke emission, the second valve gradually opens leading part of the exhaust gas into the filters. When it is almost fully open, the first one closes and the exhaust gas is being fully filtered until the engine operates in steadier conditions. Then, the valves are moved to their initial positions. The efficiency of the method, in terms of smoke emission reduction, is assessed by measuring the exhaust gas opacity after the filters. Furthermore, the differential pressure across the filters is measured, as well as the system back pressure, in order to estimate the soot load in the filters and its impact on the engine operation. The project includes the supervision of the construction and proper installation of the exhaust bypass system in the exhaust processing unit of the laboratory, the acquisition and mounting of all sensors, the installation of the necessary subsystems and the conduction of the experiments. In the context of this project, opacity measurements on a high speed passenger vessel are also carried out in order to evaluate the opacity sensor performance, as well as to observe the smoke emission from an engine operating in real conditions. In addition, a brief description of the radio – frequency soot sensing technology is performed in order to decide whether to use this or the state of the art differential pressure in order to estimate the soot load in the filters. The main objective is to develop a system that will reduce efficiently and in a safe way the smoke emission of diesel engines without interfering in their overall operation. Furthermore, additional issues must be considered so that the system will be suitable for retrofit in marine engines.	en
heal.advisorName	Kyrtatos, Nikolaos	en
heal.committeeMemberName	Papadopoulos, Christos	en
heal.academicPublisher	National Technical University of Athens. School of Naval Architecture and Marine Engineering. Laboratory of Marine Engineering	el
heal.academicPublisherID	ntua
heal.numberOfPages	181 p.
heal.fullTextAvailability	true