| 摘要 |
The disclosure relates to a three piece solar energy bulb type collector device comprising a hollow glass body shaped with a parabolic interior surface that is coated with specular finish of a metal, e.g. silver, and includes an apex aperture and integral hollow yoke. A glass test-tube like element is exteriorly coated with a wave length selective coating having more than 0.8 absorption above 2.5 microns wave length and less than 0.1 emission at 2.5 microns or less wave lengths. The coated glass tube is the absorber and has an intermediate rib and flared open end which are fused with glass at the aperture area and open end of the yoke. The absorber is coaxially located with the focal axis of the parabolic surface. A cover plate is sealed over the large end of the parabolic body enclosing the interior mirror surface area in a chamber which is placed under vacuum (evacuated). Working media, which may be either gas or liquid, is circulated from a manifold through the absorber tube to remove solar energy as heat, and is returned to the manifold. The solar energy laden media is available for heating, cooling or power generating applications.
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