Simulation and economic analysis of a CPV/thermal system coupled with an organic Rankine cycle for increased power generation

dc.contributor.author	Kosmadakis, G	en
dc.contributor.author	Manolakos, D	en
dc.contributor.author	Papadakis, G	en
dc.date.accessioned	2014-06-06T06:51:27Z
dc.date.available	2014-06-06T06:51:27Z
dc.date.issued	2011	en
dc.identifier.issn	0038092X	en
dc.identifier.uri	http://dx.doi.org/10.1016/j.solener.2010.11.019	en
dc.identifier.uri	http://62.217.125.90/xmlui/handle/123456789/5525
dc.subject	Concentration	en
dc.subject	Heat recovery	en
dc.subject	Organic Rankine cycle	en
dc.subject	PV	en
dc.subject	Solar energy	en
dc.subject.other	Concentrating photovoltaic	en
dc.subject.other	Concentrating PV	en
dc.subject.other	Concentration	en
dc.subject.other	Concentration ratio	en
dc.subject.other	Cooling unit	en
dc.subject.other	Cost analysis	en
dc.subject.other	Design points	en
dc.subject.other	Economic feasibilities	en
dc.subject.other	Electric efficiency	en
dc.subject.other	Electric energies	en
dc.subject.other	Electric power production	en
dc.subject.other	Electrical efficiency	en
dc.subject.other	Elevated temperature	en
dc.subject.other	Feasibility studies	en
dc.subject.other	Heat dissipation	en
dc.subject.other	Heat recovery	en
dc.subject.other	High intensity	en
dc.subject.other	In-buildings	en
dc.subject.other	Incident radiation	en
dc.subject.other	Integrated systems	en
dc.subject.other	Linear dependence	en
dc.subject.other	Main parameters	en
dc.subject.other	Mechanical power	en
dc.subject.other	Organic fluid	en
dc.subject.other	Organic Rankine cycles	en
dc.subject.other	Photovoltaic/thermal	en
dc.subject.other	Power production	en
dc.subject.other	Pump drive	en
dc.subject.other	PV	en
dc.subject.other	Rankine	en
dc.subject.other	Specific energy	en
dc.subject.other	Temperature increase	en
dc.subject.other	Cost accounting	en
dc.subject.other	Desalination	en
dc.subject.other	Economic analysis	en
dc.subject.other	Electric power systems	en
dc.subject.other	Electric utilities	en
dc.subject.other	Integrated control	en
dc.subject.other	Integrated optics	en
dc.subject.other	Mechanical drives	en
dc.subject.other	Photovoltaic effects	en
dc.subject.other	Pumps	en
dc.subject.other	Recovery	en
dc.subject.other	Seawater	en
dc.subject.other	Solar energy	en
dc.subject.other	Solar power generation	en
dc.subject.other	Solar radiation	en
dc.subject.other	Sun	en
dc.subject.other	Waste heat	en
dc.subject.other	Water filtration	en
dc.subject.other	Rankine cycle	en
dc.subject.other	cooling	en
dc.subject.other	cost-benefit analysis	en
dc.subject.other	degradation	en
dc.subject.other	desalination	en
dc.subject.other	design	en
dc.subject.other	dissipation	en
dc.subject.other	electricity generation	en
dc.subject.other	evaporation	en
dc.subject.other	integrated approach	en
dc.subject.other	linearity	en
dc.subject.other	numerical model	en
dc.subject.other	photovoltaic system	en
dc.subject.other	renewable resource	en
dc.subject.other	seawater	en
dc.subject.other	solar radiation	en
dc.subject.other	temperature effect	en
dc.title	Simulation and economic analysis of a CPV/thermal system coupled with an organic Rankine cycle for increased power generation	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/j.solener.2010.11.019	en
heal.publicationDate	2011	en
heal.abstract	In concentrating photovoltaic (CPV) systems the incident solar radiation is multiplied by a factor equal to the concentration ratio, with the use of lenses or reflectors. This is implemented, in order to increase the electric power production, since this value has a linear dependence from the incident radiation. Therefore, the specific energy production of the cells (kWh/m 2) radically increases, but due to this high intensity CPVs consequently operate at elevated temperatures, because heat dissipation to the environment is not so intense and heat produced cannot naturally convected. This temperature increase not only leads to a reduction of their electric efficiency, but also it must be dissipated, since issues regarding their degradation and reduction of their lifetime might arise. There are many reported ways of removing this heat, either by adding a cooling unit on the back side of the CPV module, or by recovering with possible uses in buildings, industry, additional power production or even desalination of seawater. The current work is actually a feasibility study, concerning a concentrating photovoltaic/thermal (CPV/T) system, where the heat produced is recovered by an organic Rankine cycle (ORC) for additional power production. A pump drives the organic fluid of the cycle, which is evaporated in the tubes of the CPV/T and driven to an expander for mechanical power production. For the condensation of the organic fluid several possible alternatives can be applied. That way, the PV cells can be cooled effectively and increase their electrical efficiency, while the recovered heat is designated to produce additional electric energy through the organic Rankine process, when the expander of the Rankine engine is coupled to a generator. The scope of the present work is to investigate an alternative application of concentrating PV modules through exploiting the generated heat by the ORC process and combining both technologies into an integrated system. The design of the system is presented in details, along with an optimization of some main parameters. The performance of the system will also be examined and compared with an equivalent conventional CPV system, referring to their design points. Finally, the annual and daily performance will be studied, which is a more realistic indicator, concerning the increased efficiency this integrated system is expected to have, followed by a cost analysis, in order to examine its economic feasibility as well. © 2010 Elsevier Ltd.	en
heal.journalName	Solar Energy	en
dc.identifier.issue	2	en
dc.identifier.volume	85	en
dc.identifier.doi	10.1016/j.solener.2010.11.019	en
dc.identifier.spage	308	en
dc.identifier.epage	324	en