Need of orientation in concentrating type collectors

Need of orientation in concentrating type collectors
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Need of orientation in concentrating type collectors: In flat plate collectors solar direct and diffuse radiations without sun tracking are collected for heating. It causes the loss of energy during sunshine period since the solar radiations will not be normal to the surface and the temperature achieved are only 100 0C . For temperatures above these concentrating type collectors are needed. A cylindrical parabolic collector is oriented with its focal axis pointed either in the east-west or the north-south direction. In the east-west orientation the focal axis is horizontal while in the north-south orientation, the focal axis may be horizontal or inclined.

Different methods for sun tracking :

i. The focal axis is east-west and horizontal

ii. The focal axis is north-south and horizontal

iii. The focal axis is north-south and inclined at a fixed angle equal to the latitude
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