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(11)

EP 3 247 966 A1

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(43) Date of publication: 29.11.2017 Bulletin 2017/48 (21) Application number: 16706692.7 (22) Date of filing: 15.01.2016

(51) International Patent Classification (IPC):  F28F 21/06(2006.01) F28D 9/00(2006.01) (86) International application number: PCT/US2016/013617 (87) International publication number: WO 2016/118417 (28.07.2016 Gazette 2016/30)

(84) Designated Contracting States: AL 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 RS SE SI SK SM TR Designated Extension States: BA ME Designated Validation States: MA MD (30) Priority: 20.01.2015 US 201514600927 (71) Applicant: Energy & Environmental Research Center Foundation Grand Forks, North Dakota 58202 (US)	(72) Inventors: MARTIN, Christopher Lee Grand Forks, North Dakota 58201 (US) DUNHAM, Grant Edward Grand Forks, North Dakota 58201 (US) (74) Representative: Walker, Ross Thomson  Forresters IP LLP Skygarden Erika-Mann-Strasse 11 80636 München 80636 München (DE)