(19)
(11) EP 0 057 941 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
08.12.1982 Bulletin 1982/49

(43) Date of publication A2:
18.08.1982 Bulletin 1982/33

(21) Application number: 82100978

(22) Date of filing: 10.02.1982
(84) Designated Contracting States:
BE CH DE FR GB IT LI LU NL SE

(30) Priority: 11.02.1981 US 233517

(71) Applicant: Noranda Inc.
 ()

(72) Inventor:
  • Carnavos, Theodore C.
     ()

   


(54) Heat transfer boiling surface


(57) A heat transfer device comprises a base wall of heat conductive material, a plurality of spaced apart fins formed integrally with the surface of the base wall at 30 to 40 fins per inch, and a plurality of indentations formed in the peripheral edge of the fins by a diamond knurling tool forming two series of parallel threads in the range of 40-80 threads per inch intersecting each other at an angle of 10 to 80 degrees.






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