(19)

(11)

EP 2 307 843 A2

(12)

(88) Date of publication A3: 08.04.2010 (43) Date of publication: 13.04.2011 Bulletin 2011/15 (21) Application number: 09769558.9 (22) Date of filing: 22.06.2009

(51) International Patent Classification (IPC):  F28D 9/00(2006.01) (86) International application number: PCT/GB2009/001561 (87) International publication number: WO 2009/156717 (30.12.2009 Gazette 2009/53)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK TR Designated Extension States: AL BA RS (30) Priority: 26.06.2008 GB 0811686 (71) Applicant: The University of Nottingham Nottingham NG7 2RD (GB)	(72) Inventor: RILEY, Paul, Howard Nottingham NG7 2RD (GB) (74) Representative: Swindell & Pearson Limited  48 Friar Gate Derby DE1 1GY Derby DE1 1GY (GB)