| 摘要 |
<p>A solar collector comprising one or more elongate, plate-shaped absorbers (7) which are or each of which is in heat-exchanging contact with a pipe (9) which contains a heat transport medium which discharges the heat incident on the absorber (7) or respective absorber (7), the or each absorber (7) being enveloped by an evacuated, transparent envelope (5) having a circular cross-section, there being arranged on one side of the or each absorber a reflector (15, 17) outside the envelope (5), which consists of two parts which contact the envelope (5) along a common generatrix and each of which has the form of a part of the cylindrical surface of a circular cylinder and has a centre of curvature which is situated substantially on the circumference of the envelope or respective envelope, and in which 0.8 b </= R </= b and 0.7 b </= d </= 1.2 b, wherein: R = the radius of curvature of the reflector parts (15- 17), d = the distance between the centre line of the or each envelope (5) and the edge of each of the associated reflector parts (15, 17), b = the diameter of the or each envelope (5).</p> |
