Solar receiver, particularly of the type for parabolic linear solar concentrators and the like

摘要

A solar receiver, particularly of the type for parabolic linear solar concentrators comprising a receiver tube, for the circulation of a heat transfer fluid, which is supported in a longitudinally adaptable manner in a shell that comprises a shielding body provided with a longitudinal slit, and at least one lens for closing the slit, which is permeable to the solar radiation that during use is reflected toward the receiver tube by a concentrator mirror, with which the shell is associated during use. Between the receiver tube and the shell an annular chamber is provided, which contains a preselected thermally insulating gas, at an operating pressure substantially comprised between 1 mbar and 31 mbar, the preselected gas having a thermal conductivity of substantially less than 0.01 W/mK at the operating temperature at the operating pressure.

主权项

1. A solar receiver, particularly of the type for parabolic linear solar concentrators and the like, comprising;
a receiver tube configured to circulate a heat transfer fluid, said receiver tube being supported in a longitudinally adaptable manner in a shell, said shell comprising:
a shielding body having a longitudinal slit, andat least one lens configured to close said slit, said lens being permeable to solar radiation reflected toward said receiver tube by a concentrator mirror, with which said shell is associated during use, an annular chamber located between said receiver tube and said shell, said annular chamber containing a preselected thermally insulating gas at an operating pressure substantially comprised between 1 mbar and 31 mbar, said preselected gas having a thermal conductivity of substantially less than 0.01 W/mK at the operating temperature at said operating pressure, wherein said annular chamber is not fluidly connected to said receiver tube, and at least one radiation shield interposed between said receiver tube and said shielding body of said shell, wherein said preselected thermally insulating gas is xenon or krypton.