Computer simulation studies for the integration of an external dryer into a Greek lignite-fired power plant

Kakaras, E; Ahladas, P; Syrmopoulos, S

dc.contributor.author	Kakaras, E	en
dc.contributor.author	Ahladas, P	en
dc.contributor.author	Syrmopoulos, S	en
dc.date.accessioned	2014-03-01T02:42:05Z
dc.date.available	2014-03-01T02:42:05Z
dc.date.issued	2002	en
dc.identifier.issn	0016-2361	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/30772
dc.subject	Efficiency increase	en
dc.subject	Fluidised bed dryer	en
dc.subject	Mechanical thermal dewatering process	en
dc.subject	Pre-drying	en
dc.subject.classification	Energy & Fuels	en
dc.subject.classification	Engineering, Chemical	en
dc.subject.other	Coal combustion	en
dc.subject.other	Computer simulation	en
dc.subject.other	Drying	en
dc.subject.other	Fluidized bed combustion	en
dc.subject.other	Fossil fuel power plants	en
dc.subject.other	Heat losses	en
dc.subject.other	Moisture	en
dc.subject.other	Fluidized bed dryers	en
dc.subject.other	Thermal efficiency	en
dc.subject.other	Lignite	en
dc.title	Computer simulation studies for the integration of an external dryer into a Greek lignite-fired power plant	en
heal.type	conferenceItem	en
heal.identifier.primary	10.1016/S0016-2361(01)00146-6	en
heal.identifier.secondary	http://dx.doi.org/10.1016/S0016-2361(01)00146-6	en
heal.language	English	en
heal.publicationDate	2002	en
heal.abstract	Brown coal is considered to be a competitive primary energy source for power generation in parts of Central and Eastern Europe due to the economically recoverable reserves of this fuel in these regions. On the other side, it is well known that brown coal contains significant amounts of moisture which decreases the overall plant thermal efficiency due to the increased flue gas thermal loses. In order to keep the competitive edge of brown coal, an improvement of the power plant efficiency is required. One way to achieve this target is to dry the moist brown coal before combustion. Conventionally, the necessary moisture extraction process is integrated into milling, where a recirculated flue gas stream is used as a drying agent. External brown coal drying offers the potential to increase the net thermal efficiency of the entire power generation process by up to 5% points. This paper presents a description of the technical fundamentals of drying techniques developed and successfully tested so far. Furthermore, it presents computer simulation studies for the integration of an external dryer into a steam cycle of a Greek brown coal-fired power plant as a typical test to demonstrate the potential of the drying technologies for power generation. The major objectives of these studies are to formulate basic drying schemes which might be integrated into a power production steam cycle. Three dryers using steam as a drying agent, e.g. the tubular dryer, the fluidised bed dryer and the mechanical thermal dewatering process are compared to the conventional flue gas drying technology using a computer simulation. (C) 2001 Elsevier Science Ltd. All rights reserved.	en
heal.publisher	ELSEVIER SCI LTD	en
heal.journalName	Fuel	en
dc.identifier.doi	10.1016/S0016-2361(01)00146-6	en
dc.identifier.isi	ISI:000174829000008	en
dc.identifier.volume	81	en
dc.identifier.issue	5	en
dc.identifier.spage	583	en
dc.identifier.epage	593	en