Cylinder wall insulation effects on the first- and second-law balances of a turbocharged diesel engine operating under transient load conditions

DSpace/Manakin Repository

Show simple item record

dc.contributor.author Giakoumis, EG en
dc.date.accessioned 2014-03-01T01:26:04Z
dc.date.available 2014-03-01T01:26:04Z
dc.date.issued 2007 en
dc.identifier.issn 0196-8904 en
dc.identifier.uri https://dspace.lib.ntua.gr/xmlui/handle/123456789/17912
dc.subject turbocharged diesel engine en
dc.subject transient operation en
dc.subject second-law en
dc.subject exergy en
dc.subject irreversibilities en
dc.subject insulation en
dc.subject.classification Thermodynamics en
dc.subject.classification Energy & Fuels en
dc.subject.classification Mechanics en
dc.subject.classification Physics, Nuclear en
dc.subject.other HEAT-TRANSFER en
dc.subject.other DESTRUCTION en
dc.title Cylinder wall insulation effects on the first- and second-law balances of a turbocharged diesel engine operating under transient load conditions en
heal.type journalArticle en
heal.identifier.primary 10.1016/j.enconman.2007.07.013 en
heal.identifier.secondary http://dx.doi.org/10.1016/j.enconman.2007.07.013 en
heal.language English en
heal.publicationDate 2007 en
heal.abstract During the last decades there has been an increasing interest in the low heat rejection (LHR) diesel engine. In an LHR engine, an increased level of temperatures inside the cylinder is achieved, resulting from the insulation applied to the walls. The steady-state, LHR engine operation has been studied so far by applying either first- or second-law balances. Only a few works, however, have treated this subject during the very important transient operation with the results limited to the engine speed response. To this aim an experimentally validated transient diesel engine simulation code has been expanded so as to include the second-law balance. Two common insulators for the engine in hand, i.e. silicon nitride and plasma spray zirconia are studied and their effect is compared to the nominal non-insulated operation from the first- and second-law perspective. It is revealed that after a step increase in load, the second-law values unlike the first-law ones are heavily impacted by the insulation scheme applied. Combustion and total engine irreversibilities decrease significantly (up to 23% for the cases examined) with increasing insulation. Unfortunately, this decrease is not transformed into an increase in the mechanical work but rather increases the potential for extra work recovery owing to the higher availability content of the exhaust gas. (C) 2007 Elsevier Ltd. All rights reserved. en
dc.identifier.doi 10.1016/j.enconman.2007.07.013 en
dc.identifier.isi ISI:000250910500021 en
dc.identifier.volume 48 en
dc.identifier.issue 11 en
dc.identifier.spage 2925 en
dc.identifier.epage 2933 en

Files in this item

Files Size Format View

There are no files associated with this item.

This item appears in the following Collection(s)

Show simple item record