| US 7,370,694 B2 | ||
| Condenser | ||
| Yasushi Shimizu, Yokohama (Japan); Shunji Kawano, Yokohama (Japan); Yuji Fuki, Yokohama (Japan); Yoshihiro Iwata, Kawasaki (Japan); Yuichi Fukasawa, Yokohama (Japan); and Yoshio Mochida, Ebina (Japan) | ||
| Assigned to Kabushiki Kaisha Toshiba, Tokyo (Japan) | ||
| Filed on Jul. 30, 2004, as Appl. No. 10/901,986. | ||
| Claims priority of application No. 2003-203462 (JP), filed on Jul. 30, 2003. | ||
| Prior Publication US 2005/0039891 A1, Feb. 24, 2005 | ||
| Int. Cl. F28B 1/00 (2006.01) | ||
| U.S. Cl. 165—111 [165/114] | 8 Claims |
| 1. A condenser which houses a tube bundle formed by arranging a number of condenser tubes in a condenser shell isolated from
an outside, and allows a circulating medium to flow through the condenser tubes to condense a steam turbine exhaust introduced
into the condenser shell at an outer surface of the condenser tubes, wherein the tube bundle comprises an upper tube bundle
and a lower tube bundle arranged below the upper tube bundle, and wherein the tube bundle is constructed so that the circulating
medium flows in the condenser tubes in the upper tube bundle and in the condenser tubes in the lower tube bundle in inverse
directions respectively as a two-path turning-back type structure, the condenser comprising:
a noncondensing air ejection duct provided only in one tube bundle positioned at an upstream side in a flowing direction of
the circulating medium, of the upper tube bundle and the lower tube bundle, and provided at an approximately center of a width
direction in a vertical section of the tube bundle; and
steam flow prevention plates of which upper and lower ends reach the upper tube bundle and the lower tube bundle provided
at a portion in which the condenser tubes are not arranged between the upper tube bundle and the lower tube bundle, to be
positioned at both right and left sides of the noncondensing air ejection duct,
wherein said stream flow prevention plate is arranged at a position, when each width of the tube bundle at both right and
left sides of said noncondensing air ejection duct is denoted by “L”, and when a distance from an outer side of the tube bundle
to said steam flow prevention plate is denoted by “1”, in the vertical section to the longitudinal direction of said tube
bundle, to be defined by 0.3≤1/L≤0.7.
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