| 摘要 |
<p>A solar water heater comprises a cylindrical collector (6) placed in the vicinity of the focal axis of a simple or double parabolic mirror (5). The collector is provided with a selective absorbent surface (8). The collector and parabolic mirror are placed within a housing (3) with insulation (4) and a double-glased panel (2). The water heater may be provided with a resistor for supplementary heating, a small resistor for protection from freezing and an optional magnesium anode for protection from corrosion. The water heater is supported by a frame inclined by 20-60 DEG , and can be rotated by means of a servomechanism to ensure the maximum thermal absorbance. <IMAGE></p> |
