(19)

(11)

EP 2 079 966 A1

(12)

(43) Date of publication: 22.07.2009 Bulletin 2009/30 (21) Application number: 06808879.8 (22) Date of filing: 22.09.2006

(51) International Patent Classification (IPC):  F24J 2/54(2006.01) (86) International application number: PCT/IB2006/002628 (87) International publication number: WO 2008/035132 (27.03.2008 Gazette 2008/13)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR (71) Applicant: Eskom Holdings (pty) Ltd. 2146 Sandton (ZA)	(72) Inventor: VAN DER WESTHUYZEN, David Glover 1724 Johannesburg (ZA) (74) Representative: Manley, Nicholas Michael  W.P. Thompson & Co. Coopers Building Church Street Liverpool L1 3AB Liverpool L1 3AB (GB)