| 摘要 |
<p>Abstract A novel solar heat collector (1) is presented for heating a circulating fluid with an inner glass tube (3) and an outer glass tube (6). The glass tubes are connected at their open ends (4, 7), and the space between the inner tube (3) and the outer 5 tube (6) being evacuated, whereas the inner space of the inner tube (3) being di vided by an insert (10) to define a first channel (11) and a second channel (12). Said channels are connected at the closed end (5) of the inner tube. The inner glass tube (3) and the outer glass tube (6) have smooth inner and outer surfaces and the insert (10) is provided such that the first and second channels (11, 12) and 10 a space (13) between the end of the insert (10) and the closed end (5) of the inner tube (3) define the same cross-section. (Fig, 1) Fig. 1</p> |
