Integral finned tube for submerged boiling applications having special O.D. and/or I.D. enhancement

摘要

Heat transfer tubing adapted to be submerged in a liquid to be boiled as a result of transfer of heat from the interior of the tube to the liquid. The exterior of the tubing has elongated circumferentially extending confined spaces of substantially uniform cross-section and provided with effectively continuous circumferentially extending elongated restricted openings provided at circumferentially spaced zones with substantial enlargements.