| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a light receiving pipe for a sunlight collecting unit capable of preventing release of heat due to radiation from a light absorption pipe and of improving thermal efficiency. <P>SOLUTION: Since a mirror reflection film 6 is formed on a face on the opposite trough 1 side of a transparent pipe 3, radiation heat E radiated from the heated light absorption pipe 4 can be reflected to the light absorption pipe 4 side again. Thus, due to the reflected radiation heat E, the light absorption pipe 4 is heated. By repeating this, the light absorption pipe 4 becomes a further heated state, so as to improve thermal efficiency. Although formation of the light absorption pipe 4 blocks direct incident sunlight L on the light absorption pipe 4, the amount of the sunlight L is small and therefore, does not affect heating performance. <P>COPYRIGHT: (C)2010,JPO&INPIT |
