Radiation heat collection device

摘要

This invention relates to a device that comprises at least one collection unit (11), equipped with a collection tube (21) placed on supports (23), which is formed by an inner absorber tube (31) shaped as a continuous tube and an outer envelope tube (33). The collection unit (11) also comprises reflectors (15) that direct the radiation toward the collection tube (21). Moreover, the device comprises means (41, 43) designed to maintain the collection tube (21) space between the absorber tube (31) and the envelope tube (33) at a pressure of between 5·10−1-5·10−2 mbar. The main advantages of the invention include the reduction in the breaking of glass due to the lower stresses to fatigue, an increase in the effective collection surface (97%-99%) and active management of the vacuum, which makes it possible to monitor the evolution thereof at all times.

主权项

1. Radiation heat collection device that comprises at least one collection unit (11) equipped with a collection tube (21) placed on supports (23) and reflectors (15), wherein the collection tube is formed by an inner absorber tube (31) and an outer envelope tube (33), the reflectors (15) direct the radiation toward the collection tube (21), and wherein said radiation heat collection device comprises means designed to maintain the collection tube (21) space between the inner absorber tube (31) and the outer envelope tube (33) at a pressure of between 5×10−1 to 5×10−2 mbar when the device is operative, wherein the outer envelope tube (33) is formed by multiple segments united by joints (51, 81, 95, 95′) that include support and slide means for the inner absorber tube (31), wherein said joints (81) comprise: flanges (83, 83′) fixed to a support (23); an insulation crown (85) with lateral slots (87, 87′) designed for the reception of each pair of segments (35, 35′) of the outer envelope tube (33) between pairs of sealing bands (89, 89′); and inner radial teeth (86) designed for the support and sliding of the inner absorber tube (31) and radial tightening means for said flanges (83, 83′).