| 摘要 |
Provided is a multi-tube type heat exchanger with which it is possible to increase, with respect to the inner surface of a tube sheet, the directionality and the acceleration of the flow of a cooling medium introduced into a case or a shell, and to increase the boiling-prevention effect for the cooling medium at the exhaust gas inlet side, particularly with a multi-tube type heat exchanger for which a heat transfer tube group is formed with flat tubes. This multi-tube type heat exchanger is one for which multiple flat heat transfer tube groups that have been stacked are attached to tube sheets provided at both ends of a casing, with a heat exchange being performed between an exhaust gas circulating in the flat heat transfer tubes and a cooling medium circulating in the casing, and is characterized in that a cooling medium distributor equipped with a cooling medium inflow tube is provided near the end of the casing at the exhaust gas inlet-side, and a nozzle member, having multiple spray holes in a direction approximately orthogonal to the lengthwise direction of the casing so as to increase the speed with which the cooling medium is sprayed as compared to its speed within the cooling medium distributor, is provided near the connected part of the cooling medium distributor and the casing. |
