| 摘要 |
Heat transfer element, in particular radiant heater, comprising tubes for a circulating fluid, such as water, oil or vapor, and radiation panels formed with profile portions adapted to be mounted in good thermal contact with the tube surface, the tubes having a polygonal cross-section of which two adjacent sides are adapted to each engage one plane surface of the profile portion being formed in a single or in two contiguous radiation panels, and that the plane surfaces of the profile portion are pressed elastically resiliently against said adjacent sides of the tube. |
