Patent ID: 9004994
Filing Date: 2015-04-14
Classification: E21F

Abstract:
1. A system for decreasing airflow mounted in a railroad tunnel for passage of a train comprising at least one locomotive and one or more cars, the tunnel comprising an entrance, an exit, and a length extending in a longitudinal direction therebetween and including a path comprising rails for movement of the train therethrough; the system comprising: a plurality of air baffles mounted within the railroad tunnel, each air baffle comprising a body and a mounting portion, the body comprising a top side, a bottom side, a front side, a back side, a mounting side and an annulus side, the annulus side of the body extending into an annulus of the tunnel, the mounting portion on the mounting side of the body, each mounting portion mounting each body on a side wall of the tunnel and positioning the mounting portion inside the tunnel along the length such that the annulus side of each body extends into the tunnel, wherein the air baffles are configured to restrict airflow at least in part in the longitudinal direction of the tunnel, thereby increasing a relative difference between the train speed and air speed in the tunnel annulus when the train passes through the tunnel, and wherein each mounting portion positions the bottom side of each respective body at a height above the path and rails of the tunnel.