| 摘要 |
PURPOSE:To avoid an unstable flow in the interior of a heat-transmitting pipe without inducing a surplus of a heating fluid and contrive to enhance reliability at the time of supercooling, by a method wherein a sleeve having a bellows construction on the upstream side and flow nozzle construction on the other side is fitted into a pipe at an end part of a heat-transmitting pipe in a tube nest. CONSTITUTION:The sleeve 28 having the bellows construction in proximity to an inlet on the side of a partitioned chamber 6 and the flow nozzle construction at the other end is fitted in the heat-transmitting pipe provided in a hole 30 of a tube plate 3, the nozzle diameter (d) of the sleeve 28 is varied from the pipe 31 to a heat-transmitting pipe 32 on the lower side of the pipe 31, and the tube plate 3 is divided into several parts. Thus, distribution of heat load in the tube nest is made tube uniform, so that a condensate flow 27 in the pipe becomes nearer to a stable laminar flow, and an unstable flow phenomenon of the condensate is prevented from occurring. In addition, by constricting the passages area in the longitudinal direction of the sleeve 28, the heat-transmitting pipe 24 can be prevented from being damaged by exfoliation, vortex or the like generated on the downstream side, and reliability of the pipes and the heat exchanger can be enhanced. |
