Vacuum solar thermal panel with radiative screen

摘要

A double-sided vacuum thermal solar panel comprising a vacuum-tight envelope capable of withstanding atmospheric pressure when evacuated, the envelope comprising a first and a second glass plate transparent to solar radiation and facing each other, a perimeter frame defining the lateral surface of the envelope, the solar panel comprising at least one first heat absorber, a second heat absorber, a pipe which enters and exits the envelope by passing in between the first and second heat absorber, and a box-like element which surrounds the outer surface of the pipe.

主权项

1. A double-sided vacuum thermal solar panel comprising:
a vacuum-tight envelope capable of withstanding atmospheric pressure when evacuated, said envelope including a first and a second glass plate transparent to solar radiation and facing each other to define the two active surfaces of the solar panel, a perimeter frame defining a lateral surface of said envelope, said perimeter frame provided with two exit ports and a pumping port; at least one first heat absorber placed inside said envelope and able to receive solar radiation through the first glass plate; a second heat absorber placed inside said envelope and able to receive solar radiation through the second glass plate; a pipe which enters and exits said envelope by passing in between said first and second heat absorber and presenting an outer surface in contact with said first and second heat absorber; a support frame for supporting said first and a second glass plates of said envelope, and said pipe, the support frame including longitudinal elements and transverse elements; and a box-like element provided inside said envelope and said support frame, wherein said box-like element completely surrounds the outer surface of the pipe positioned within the box-like element such that all sides of the pipe are enclosed by the box-like element to thereby form a radiation screen for irradiation between the pipe and the perimeter frame, wherein said box-like element is supported only by the pipe, and wherein said box-like element is a metal box distinct and thermally isolated from said perimeter frame and said support frame, to limit dispersion by irradiation between the pipe and said peripheral frame and support frame.