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  • F28F13/00
    		•  Arrangements for modifying heat transfer, e.g. increasing, decreasing (F28F 1/00-F28F 11/00 take precedence) HB CC 3L066
  • F28F13/02
    		•  .by influencing fluid boundary (boundary-layer control in general F15D) HB CC 3L066
  • F28F13/02@A
    		•  forming boiling heat transfer surfaces HB CC 3L066
  • F28F13/02@B
    		•  .fine grooves being formed in heat transfer pipes or walls HB CC 3L066
  • F28F13/02@C
    		•  .fine particle layers being formed on heat transfer surfaces HB CC 3L066
  • F28F13/02@D
    		•  .wire netting or porous plates being added to heat transfer surfaces HB CC 3L066
  • F28F13/02@Z
    		•  Others HB CC 3L066
  • F28F13/04
    		•  .by preventing the formation of continuous films of condensate on heat-exchange surfaces, e.g. by promoting droplet formation HB CC 3L066
  • F28F13/06
    		•  .by affecting the pattern of flow of the heat-exchange media HB CC 3L066
  • F28F13/08
    		•  ..by varying the cross-section of the flow channels HB CC 3L066
  • F28F13/10
    		•  ..by imparting a pulsating motion to the flow, e.g. by sonic vibration HB CC 3L066
  • F28F13/12
    		•  ..by creating turbulence, e.g. by stirring, by increasing the force of circulation (F28F 13/08 takes precedence) HB CC 3L066
  • F28F13/12@A
    		•  by fins HB CC 3L066
  • F28F13/12@B
    		•  by stirring members HB CC 3L066
  • F28F13/12@C
    		•  inserts in heat transfer pipes HB CC 3L066
  • F28F13/12@D
    		•  by injection of bubbles HB CC 3L066
  • F28F13/12@Z
    		•  Others HB CC 3L066
  • F28F13/14
    		•  .by endowing the walls of conduits with zones of different degrees of conduction of heat HB CC 3L066
  • F28F13/16
    		•  .by applying an electrostatic field to the body of the heat-exchange medium HB CC 3L066
  • F28F13/18
    		•  .by applying coatings, e.g. radiation-absorbing, radiation-reflecting; by surface treatment, e.g. polishing HB CC 3L066
  • F28F13/18@A
    		•  forming of water resistant films HB CC 3L066
  • F28F13/18@B
    		•  forming of hydrophilic films HB CC 3L066
  • F28F13/18@C
    		•  coated with water retention members HB CC 3L066
  • F28F13/18@D
    		•  forming metal particle layers HB CC 3L066
  • F28F13/18@E
    		•  coated with radiant heat absorbing films HB CC 3L066
  • F28F13/18@Z
    		•  Others HB CC 3L066
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