FLAT-PLATE COLLECTOR OF SOLAR ENERGY

摘要

The invention concerns individual solar energy flat-plate collector devices and its goal is to increase the effectiveness of the use of a collector's working surface. The essence of the invention is: the both sides of an absorber plate are covered with the radiation absorbing layer and for irradiation of the absorber's rear side mirrors are located at the both sides of the collectors shadow's normal-plane section. The mirrors are oriented so that the solar radiation falling on them is reflected to the rear side of the absorber, i.e., at the opposite side of the sun. One of the variants of the invention is shown in Fig.3, and the collector device comprises: a frame 1, where between side balks the flat-plate solar collectors is fixed in, but from outside of the balks two mirrors 3 and 4 are fastened. The collector and mirrors are secured symmetrically and perpendicularly to the frame plane. In the nests of frame's bearing a balk 5 is placed, which in its centre, immovably on the axle of a gear-box 6, is placed, but the gear-box in its turn immovably on a support 7 is fixed. Into the frame 1 a cross-beam 8 is fastened immovably. The bulk 5 and the cross-beam 8 are mutually connected by means of a screw mechanism 9, which have a handle 10. In order to work automatically, the device is additionally provided with an electric motor 11 and variable resistance (potentiometer) 12, which transmission axle with the axle of the gear-box 6 is coupled. The shame of the automatic control of the device is present in Fig.4. It is supplied with a step-shaped voltage generator Ug, operational amplifier and the electric motor 11 (M), which direction of rotation is dependent on the polarity of the supplied voltage, and variable resistance 12 (R). During round-the-clock the generator Ug makes 72 voltage stepwise increments at an time intervals of 20 min. From each of the steps the frame of the device together with the system collector-mirrors turns by 50 this turn being bound the direction of the sun's movement. At night, when the stepwise voltage runs to zero the system collector-mirrors, turning in opposite the sun's movement direction, returns to the starting position. The voltage generator Ug has manual distance control button SA, which is envisaged for the quick orientation of the device to the sun.