Efficiency optimization potential in supercritical Organic Rankine Cycles

Schuster, A; Karellas, S; Aumann, R

dc.contributor.author	Schuster, A	en
dc.contributor.author	Karellas, S	en
dc.contributor.author	Aumann, R	en
dc.date.accessioned	2014-03-01T01:33:20Z
dc.date.available	2014-03-01T01:33:20Z
dc.date.issued	2010	en
dc.identifier.issn	0360-5442	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/20380
dc.subject	Low temperature heat recovery	en
dc.subject	ORC	en
dc.subject	Organic Rankine Cycle	en
dc.subject	Supercritical fluid	en
dc.subject.classification	Thermodynamics	en
dc.subject.classification	Energy & Fuels	en
dc.subject.other	Decentralised	en
dc.subject.other	Efficiency optimization	en
dc.subject.other	Exergetic efficiency	en
dc.subject.other	Exergy loss	en
dc.subject.other	Heat sources	en
dc.subject.other	Low temperature heat recovery	en
dc.subject.other	Low temperature heat sources	en
dc.subject.other	Optimization potential	en
dc.subject.other	ORC	en
dc.subject.other	Organic Rankine cycles	en
dc.subject.other	Super-critical	en
dc.subject.other	Supercritical parameters	en
dc.subject.other	Surplus heat	en
dc.subject.other	Thermal efficiency	en
dc.subject.other	Working fluid	en
dc.subject.other	Effluent treatment	en
dc.subject.other	Optimization	en
dc.subject.other	Supercritical fluids	en
dc.subject.other	Waste heat	en
dc.subject.other	Rankine cycle	en
dc.subject.other	comparative study	en
dc.subject.other	efficiency measurement	en
dc.subject.other	exergy	en
dc.subject.other	heat transfer	en
dc.subject.other	low temperature	en
dc.subject.other	numerical model	en
dc.subject.other	optimization	en
dc.subject.other	supercritical flow	en
dc.subject.other	thermodynamics	en
dc.title	Efficiency optimization potential in supercritical Organic Rankine Cycles	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/j.energy.2009.06.019	en
heal.identifier.secondary	http://dx.doi.org/10.1016/j.energy.2009.06.019	en
heal.language	English	en
heal.publicationDate	2010	en
heal.abstract	Nowadays, the use of Organic Rankine Cycle (ORC) in decentralised applications is linked with the fact that this process allows the use of low temperature heat sources and offers an advantageous efficiency in small-scale concepts. Many state-of-the-art and innovative applications can successfully use the ORC process. In this process, according to the heat source level, special attention must be drawn to the choice of the appropriate working fluid, which is a factor that affects the thermal and exergetic efficiency of the cycle. The investigation of supercritical parameters of various working fluids in ORC applications seems to bring promising results concerning the efficiency of the application. This paper presents the results from a simulation of the ORC and the optimization potential of the process when using supercritical parameters. In order to optimize the process, various working fluids are considered and compared concerning their thermal efficiency and the usable percentage of heat. The reduction of exergy losses is discussed based on the need of surplus heat exchanger surface. (C) 2009 Elsevier Ltd. All rights reserved.	en
heal.publisher	PERGAMON-ELSEVIER SCIENCE LTD	en
heal.journalName	Energy	en
dc.identifier.doi	10.1016/j.energy.2009.06.019	en
dc.identifier.isi	ISI:000275166900064	en
dc.identifier.volume	35	en
dc.identifier.issue	2	en
dc.identifier.spage	1033	en
dc.identifier.epage	1039	en