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Concentrators - Sine Law - Page 3

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Posted by Duane C. Johnson on October 10, 2006, 10:23 pm
 
Hi Nick;

nicksanspam@ece.villanova.edu wrote:

 > > ... I think you are describing a CPC, Compound
 > > Parabolic Concentrator. Your 2.488X is close to
 > > the value in the figure in the excellent book:
 > > "Solar Engineering of Thermal Processes"
 > > Duffie & Beckman
 > > ISBN 0-471-51056-4
 > > 1991

 > Which figure?
 > I don't see that in the 2006 edition.

Figures 7.6.4, 7.6.5, & 7.6.6
adapted from Rabl (1976b).
These refer to the CPC diagram
Figure 7.6.3
These are from pages 347 to 350.
My book was published in 1991.

Also, a definition of "area concentration ratio"
is described in 7.2, page 333.
This is defined as:
the ratio of the area of aperture to the area of
the receiver. Also known as "concentration ratio".

Since the described receiver is circular I
would use the circumference in calculating
"concentration ratio".

 > Nick

Duane

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