F
SECTION F — MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  
LIGHTING AND HEATING
 F28
HEAT EXCHANGE IN GENERAL
 F28

Note(s)

  1. Apparatus using heat exchange or heat transfer (as defined below) for specific purposes is classified either in sub-class F28B or in the appropriate sub-classes of, for example, classes F22, F24, F25, F26, or F27; if no such other sub-class is appropriate, such apparatus is classified in sub-clas F28C or F28D.
  2. In this class, the following terms are used with the meanings indicated:
    1. "Heat exchange" means the heating or cooling of a fluid or fluent solid by direct or indirect contact with a heated or cooled fluid or fluent solid.
    2. "Heat transfer" means the heating or cooling of a fluid or fluent solid by direct contact with a heated or cooled surface or body.
 F28B
STEAM OR VAPOUR CONDENSERS (condensation of vapours B01D 5/00; steam engine plants having condensers F01K; liquefaction of gases F25J; details of heat-exchange and heat-transfer arrangements of general application F28F)
 F28B 1/00
Condensers in which the steam or vapour is separated from the cooling medium by walls, e.g. surface condenser
 F28B 1/02
·  using water or other liquid as the cooling medium
 F28B 1/04
·  ·  the steam or vapour chamber being rotating
 F28B 1/06
·  using air or other gas as the cooling medium
 F28B 3/00
Condensers in which the steam or vapour comes into direct contact with the cooling medium
 F28B 3/02
·  by providing a flowing coating of cooling liquid on the condensing surface
 F28B 3/04
·  by injecting cooling liquid into the steam or vapour (F28B 3/08 takes precedence)
 F28B 3/06
·  by injecting the steam or vapour into the cooling liquid (F28B 3/08 takes precedence)
 F28B 3/08
·  with rotatable members
 F28B 5/00
Condensers employing a combination of the methods covered by groups F28B 1/00 and F28B 3/00; Other condensers
 F28B 7/00
Combinations of two or more condensers, e.g. provision of reserve condenser
 F28B 9/00
Auxiliary systems, arrangements, or devices
 F28B 9/02
·  for feeding steam or vapour to condensers
 F28B 9/04
·  for feeding, collecting, and storing cooling water or other cooling liquid
 F28B 9/06
·  ·  with provision for re-cooling the cooling water or other cooling liquid
 F28B 9/08
·  for collecting and removing condensate
 F28B 9/10
·  for extracting, cooling, and removing non-condensable gases
 F28B 11/00
Controlling arrangements with features specially adapted for condensers (control arrangements in general G05)