US4246891A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low reflection loss cusp like reflector for solar energy collector
Assignee: JOULE' Inc
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Filing: 1979-09-12
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Granted: 1981-01-27
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Expires: 1999-09-12
Abstract
Abstract There is disclosed the manner in which a reflector for a solar energy collector is designed. The absorber is a right circular cylinder and is contained in an evacuated glass shroud. The glass shroud prevents the use of the reflector design technique of the prior art, and instead calculations are performed as if an absorber having a smaller diameter were to be used.
Inventors
- 👤 Raymond H. Lambert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:51
CPC Classifications
F; F24; F24S; F24S10/00; F24S10/40; F24S10/45; F24S23/00; F24S23/70; F24S23/80; F24S2023/83; F24S2023/838; Y; Y02; Y02E; Y02E10/00; Y02E10/40; Y02E10/44
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
92 words
A reflector for a solar energy collector having a circular absorber contained in a glass shroud comprising: a reflector profile having a first portion extending between θ=0 and θ=π/2+θ a generated in accordance with: p=r.sub.d θ a second portion extending from θ=π/2+θ a generated in accordance with: ##EQU2## where: p=the perpendicular distance from the reflector to the tangent to the absorber, r d =a radius smaller than that of the absorber, θ=the rotational position on the absorber measured from the negative y axis, and θ a =the design 1/2 field of view.
Claim 2
Dependent Claim
92 words
A reflector for a solar energy collector having a circular absorber contained in a glass shroud comprising: a reflector profile having a first portion extending between θ=0 and θ=π/2+θ a generated in accordance with: p=r.sub.d θ a second portion extending from θ=π/2+θ a generated in accordance with: ##EQU2## where: p=the perpendicular distance from the reflector to the tangent to the absorber, r d =a radius smaller than that of the absorber, θ=the rotational position on the absorber measured from the negative y axis, and θ a =the design 1/2 field of view.
Claim 3
Dependent Claim
38 words
A reflector for a solar energy collector having a circular absorber contained in a glass shroud in accordance with claim 1 wherein: part of said first portion of said reflector profile is omitted to accommodate said glass shroud.
Claim 4
Dependent Claim
51 words
A reflector for a solar energy collector having a circular absorber contained in a glass shroud in accordance with claim 2 wherein: said second portion of said reflector profile terminates at the point where a ray at solar noon will begin to have more than one reflection before reaching said absorber.
Claim 5
Dependent Claim
34 words
A reflector for a solar energy collector having acircular absorber contained in a glass shroud in accordance with claim 2 wherein: said absorber has its center positioned below the center for r d .
Claim 6
Dependent Claim
52 words
A reflector for a solar energy collector having a circular absorber contained in a glass shroud in accordance wth claim 1 wherein: part of said first portion of said reflector profile is omitted to accommodate said glass shroud. r d is from 5% to 15% smaller than the radius of said absorber.
Claim 7
Dependent Claim
37 words
A reflector for a solar energy collector having a circular absorber contained in a glass shroud in accordance with claim 4 wherein: the top of said absorber is tangent to a circle drawn at r d .
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-01-27 | 1984-07-28 | 1985-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-01-27 | 1988-07-28 | 1989-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-01-27 | 1992-07-28 | 1993-01-27 | $7700.00 | Window Closed / Lapsed |