An investigation of design concepts and control strategies of a double-stage expansion solar organic Rankine cycle

dc.contributor.author	Kosmadakis, G	en
dc.contributor.author	Manolakos, D	en
dc.contributor.author	Papadakis, G	en
dc.date.accessioned	2014-06-06T06:52:17Z
dc.date.available	2014-06-06T06:52:17Z
dc.date.issued	2013	en
dc.identifier.issn	14786451	en
dc.identifier.uri	http://dx.doi.org/10.1080/14786451.2013.827682	en
dc.identifier.uri	http://62.217.125.90/xmlui/handle/123456789/5943
dc.subject	control	en
dc.subject	optimisation	en
dc.subject	organic Rankine cycle	en
dc.subject	scroll expander	en
dc.subject	solar collectors	en
dc.title	An investigation of design concepts and control strategies of a double-stage expansion solar organic Rankine cycle	en
heal.type	other	en
heal.identifier.primary	10.1080/14786451.2013.827682	en
heal.publicationDate	2013	en
heal.abstract	A small-scale, low-temperature solar organic Rankine cycle (ORC) is investigated, focusing on some key aspects of its design and operation, in order for the system to track the optimised point under variable weather conditions. Two major configurations can be identified for small-scale ORCs using two expansion stages, for improving the performance at variable loads. The first concerns the use of a cascade ORC and the second one of a single circuit with two in-series expanders. The first goal of this study is to theoretically investigate the performance of these two alternative configurations under variable heat inputs from evacuated tube solar collectors. The configuration finally selected is the ORC with two in-series expanders, showing higher efficiency for the entire range of incident solar radiations. This configuration is then further investigated, focusing on its operation and control, such as the by-passing of the first expander, in order to optimise its operation. © 2013 Taylor & Francis.	en
heal.journalName	International Journal of Sustainable Energy	en
dc.identifier.doi	10.1080/14786451.2013.827682	en