초록 ▼

A low cost, extended surface, finned-tube of rectangular cross-section is disclosed for use in single-row bundles of the type used in power plant air-cooled steam condensers. The steel U-shaped fins are metallurgically bonded to the steel tubes by hot-dip galvanizing; aluminum fins would be brazed o

A low cost, extended surface, finned-tube of rectangular cross-section is disclosed for use in single-row bundles of the type used in power plant air-cooled steam condensers. The steel U-shaped fins are metallurgically bonded to the steel tubes by hot-dip galvanizing; aluminum fins would be brazed on. The bottom section of the tubes that flow the condensate have a built-in freeze protection feature.

대표청구항 ▼

Apparatus for use in condensing steam, the apparatus including an elongated, air-cooled tube having a generally rectangular shape with flat side-walls and end-walls therebetween, the apparatus also including a plurality of thin, closely spaced, generally U-shaped, extended surface, heat transfer fin

Apparatus for use in condensing steam, the apparatus including an elongated, air-cooled tube having a generally rectangular shape with flat side-walls and end-walls therebetween, the apparatus also including a plurality of thin, closely spaced, generally U-shaped, extended surface, heat transfer fins coupled to the tube in a completely stacked relationship, each fin being of a three-link design and with two outer fin-links and a middle fin-link therebetween as an abutting extension of the outer fin-links, the middle fin-link having an inner portion shaped to generally conform to the adjacent shape of the tube and having an outer portion curved to provide an optimized clamping force, with the fins held in place on the tube by the two outer fin-links clamped against the flat side walls of the tube by stress-induced forces generated in the middle fin-links as a result of the forced movement between one end-wall of the tube and the fins when assembled on the tube and means to permanently bond the fins to the tube in a separate metallurgical procedure.