| 摘要 |
<p>A feeder tube (26) for outputting a liquid evenly along its length is formed of an inner tube (40) and an outer tube (42), each having a split (48, 50) along at least pan of their lengths. The splits (48, 50) are positioned away from each other thus allowing liquid in the inner and outer tubes (40, 42) through the split (48) in the inner tube (40) and into a gap (44) between the inner and outer tubes (40, 42). The liquid is then output from the feeder tube (26) through the split (50) in the outer tube (42). The feeder tube (26) may be incorporated in liquid evaporation apparatus for enabling heat transfer between a liquid and the external surface of a heated elongate element. In the apparatus at least one feeder tube (26) is positioned above and at least in part parallel to the elongate member, whereby an even film of the fluid in liquid form is formed on at least a part of the elongate element. <IMAGE></p> |
