Mελέτη αντικατάστασης οργανικού ρευστού για υπάρχουσα μονάδα Οργανικού Κύκλου Rankine μέσω του λογισμικού ASPEN

Γαλανός, Μιχαήλ; Galanos, Michail

dc.contributor.author	Γαλανός, Μιχαήλ	el
dc.contributor.author	Galanos, Michail	en
dc.date.accessioned	2021-01-04T14:25:01Z
dc.date.available	2021-01-04T14:25:01Z
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/52723
dc.identifier.uri	http://dx.doi.org/10.26240/heal.ntua.20421
dc.rights	Default License
dc.subject	Οργανικό ρευστό	el
dc.subject	Οργανικός κύκλος Rankine	el
dc.title	Mελέτη αντικατάστασης οργανικού ρευστού για υπάρχουσα μονάδα Οργανικού Κύκλου Rankine μέσω του λογισμικού ASPEN	el
dc.title	Study of organic fluid replacement for existing unit of Organic Rankine Cycle with the use of ASPEN software	en
heal.type	bachelorThesis
heal.classification	Mechanical engineering	en
heal.language	el
heal.access	free
heal.recordProvider	ntua	el
heal.publicationDate	2020-02-21
heal.abstract	Given the growing concerns over the greenhouse effect and the effect of many refrigerants on it,the Montreal Protocol sets out to replace some harmful refrigerants with more environmentally friendly ones. Towards this direction, the present study addresses the replacement of R134a refrigerant in a low-temperature Organic Rankine Cycle with other more environmentally friendly working fluids.For this reason , 5 pure fluids and 5 mixtures were evaluated for their enemrgy and exergy competitiveness. From an energy standpoint , the R245fa appears to outperform all other fluids both in the net electrical efficiency as well as the output power of expanders. The power output using R245fa in the nominal operating conditions of the plant was 8.99 kW with efficiency of 7.5%. Similarly from the economic perspective, the R245fa with 7200 operating hours/year leads to a payback period of 0.27 years if the investment profil is derived from the sale of surplus electricity generated by the replacement of the working fluid.A similar conclusion is based on the net present value (NPV) with R245fa operation to result in a NPV 120,126 euros for an investment life of 20 years.	en
heal.advisorName	Καρέλλας, Σωτήριος	el
heal.committeeMemberName	Καρέλλας, Σωτήριος	el
heal.committeeMemberName	Κακαράς, Εμμανουήλ	el
heal.committeeMemberName	Χουντάλας, Δημήτριος	el
heal.academicPublisher	Εθνικό Μετσόβιο Πολυτεχνείο. Σχολή Μηχανολόγων Μηχανικών. Τομέας Θερμότητας. Εργαστήριο Ατμοκινητήρων και Λεβήτων	el
heal.academicPublisherID	ntua
heal.numberOfPages	101 σ.	el
heal.fullTextAvailability	false