| 摘要 |
A heat exchanger comprises a shell (34) having a longitudinal axis (A-A) and configured to receive a first fluid; and a plurality of quadrant-shaped baffles (32) each mounted in the shell (34) at an angle to the longitudinal axis (A-A) to guide a first fluid flow into a helical pattern through the shell at a substantially uniform velocity, wherein the quadrant-shaped baffles (32) each have a respective pair of opposite sides configured to be flat or curved and a plurality of spaced apart holes (50) configured to be traversed by a plurality of axially extending pipes (40) carrying a second fluid in a desired position of the quadrant-shaped baffles (32). The heat exchanger is characterized in that the angle (») differs from a right angle. The opposite sides of each quadrant-shaped baffle (32) define therebetween an elliptical outer edge (46) facing an inside of the shell (34) and spaced therefrom at a uniform radial distance, whereas the first fluid generates a substantially uniform pressure along opposite sides of each quadrant-shaped baffle (32) as the first fluid flows between the elliptical outer edge of the quadrant-shaped baffles (32) and the inside of the shell at a substantially uniform velocity. Each of the apexes of the quadrant-shaped baffles (32) have a respective notch (42) shaped to conform to an outer surface of a central pipe centered along the longitudinal axis of the shell (34). |
