BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Memento EPFL//
BEGIN:VEVENT
SUMMARY:Theoretical and experimental analysis of an innovative dual-axis t
 racking linear Fresnel lenses concentrated solar thermal collector
DTSTART:20170210T140000
DTEND:20170210T150000
DTSTAMP:20260502T210414Z
UID:a901faad2f2ef82cdb28ba1bb8949f4b8d1a9e449603ec19468d22d5
CATEGORIES:Conferences - Seminars
DESCRIPTION:Simone Perini\nKTP Associate Cranfield University\nLinear conc
 entrating solar thermal systems offer a promising method for harvesting so
 lar energy. In this paper\, a model for a novel linear Fresnel lens collec
 tor with dual-axis tracking capability is presented. The main objective is
  to determine the performance curve of this technology by means of both ex
 periment and theoretical analysis. A mathematical model including the opti
 cal model of the concentrator and the heat transfer model of the receiver 
 pipe was developed. This tool was validated with experimental data collect
 ed using a proof of concept prototype installed in Bourne\, UK. The perfor
 mance curve of the collector was derived for temperatures between 40°C an
 d 90°C. The results show that the global efficiency of the collector is l
 imited to less than 20%. The energy losses have been analysed. The optical
  losses in the lens system accounts for 47% of the total energy dissipated
 . These are due to absorption\, reflection and diffraction in the Fresnel 
 lenses. Furthermore\, manufacturing error in the lens fabrication has to b
 e considered. One third of the solar radiation collected is lost due to th
 e low solar absorptance of the receiver pipe. Thermal radiation and convec
 tion accounts for 6% of the total as relatively low temperatures (up to 90
  °C) are involved. In order to increase the performance of the system\, i
 t is recommended to install an evacuated receiver and to insulate the reci
 rculation system. Considering data from manufacturers\, these improvements
  could increase the global efficiency up to 55%. Utilising the results fro
 m this work\, there is the intention of building an improved version of th
 is prototype and to conduct further tests.\n\nReferences:\nC. Sansom\, X. 
 Tonnellier\, P. King\, S. Perini\, ““Theoretical and experimental anal
 ysis of an innovative dual-axis tracking linear Fresnel lenses concentrate
 d solar thermal collector””\, Solar Energy\, under review.
LOCATION:Zeuzier
STATUS:CONFIRMED
END:VEVENT
END:VCALENDAR