|  | F |
SECTION F — MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING

LIGHTING AND HEATING

|  | F28 |
HEAT EXCHANGE IN GENERAL

|  | F28 |
Note(s) Apparatus using heat exchange or heat transfer (as defined below) for specific purposes is classified either in sub-class Fulltext... Hierarchy... Expanded...F28B or in the appropriate sub-classes of, for example, classes Fulltext... Hierarchy... Expanded...F22, Fulltext... Hierarchy... Expanded...F24, Fulltext... Hierarchy... Expanded...F25, Fulltext... Hierarchy... Expanded...F26, or Fulltext... Hierarchy... Expanded...F27; if no such other sub-class is appropriate, such apparatus is classified in sub-clas Fulltext... Hierarchy... Expanded...F28C or Fulltext... Hierarchy... Expanded...F28D. In this class, the following terms are used with the meanings indicated: "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. "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 Fulltext... Hierarchy... Expanded...B01D 5/00; steam engine plants having condensers Fulltext... Hierarchy... Expanded...F01K; liquefaction of gases Fulltext... Hierarchy... Expanded...F25J; details of heat-exchange and heat-transfer arrangements of general application Fulltext... Hierarchy... Expanded...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 |
· · | employing moving walls

|  | F28B 1/06 |
· | using air or other gas as the cooling medium

|  | F28B 1/08 |
· · | employing moving walls [3]

|  | 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 (Fulltext... Hierarchy... Expanded...F28B 3/08 takes precedence)

|  | F28B 3/06 |
· | by injecting the steam or vapour into the cooling liquid (Fulltext... Hierarchy... Expanded...F28B 3/08 takes precedence)

|  | F28B 3/08 |
· | with rotatable members

|  | F28B 5/00 |
Condensers employing a combination of the methods covered by groups Fulltext... Hierarchy... Expanded...F28B 1/00 and Fulltext... Hierarchy... Expanded...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 Fulltext... Hierarchy... Expanded...G05)