Claims
- 1. In combination with a tubular energy receiver, a Compound Parabolic Concentrator trough having an opening adapted to be oriented toward a source of radiant energy, said trough provided with reflective concave sidewalls, a portion of each of which is shaped to assume the maximum possible slope consistent with reflecting maximum angle energy rays onto said energy receiver, each of said sidewalls terminating and joined to a reflective trough-shaped cavity, said cavity comprising: a pair of substantially planar walls joined at an apex and arranged in a V-shape wherein the mouth of said V forms an aperture; said tubular energy receiver being placed no further from said apex than tangent to said aperture.
- 2. The invention as in claim 1 wherein the apex of said V trough is a distance h from the tubular receiver so that the angular subtense 2.alpha. of said receiver as seen from said apex is .gtorsim.2(38.2.degree.).
- 3. The invention as in claim 2 wherein said tubular receiver is circular in cross section and of radius r, and the distance between the nearest point of said receiver and said point of joining between said concave sidewalls and planar walls is .ltoreq.0.27r.
- 4. In combination with an energy receiver, a trough having an opening adapted to be oriented toward a source of radiant energy, said trough provided with reflective concave sidewalls, a portion of each of which is shaped to assume the maximum possible slope consistent with reflecting maximum angle energy rays onto said energy receiver, each of said sidewalls terminating and joined to a reflective trough-shaped cavity, said cavity comprising: a pair of substantially planar walls joined at an apex and arranged in a V-shape wherein the mouth of said V forms an aperture; said aperture placed a distance from the nearest point of said energy receiver such that the angular subtense 2.phi. of said receiver as seen from said energy aperture is .gtoreq.60.degree., whereby said V-shaped walls are positioned to reflect all energy incident thereon from outside said angular subtense 2.phi., to within said angular subtense 2.phi..
Parent Case Info
This application is a continuation of application Ser. No. 113,169, filed Jan. 18, 1980 now abandoned.
US Referenced Citations (2)
Number |
Name |
Date |
Kind |
4059093 |
Knowles et al. |
Nov 1977 |
|
4215674 |
Riggs et al. |
Aug 1980 |
|
Continuations (1)
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Number |
Date |
Country |
Parent |
113169 |
Jan 1980 |
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