Patent US3800747A successfully refreshed from Google Patents.
US3800747A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat transfer structure
Assignee: Raytheon Co
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Filing: 1972-09-25
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Granted: 1974-04-02
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Expires: 1992-09-25
Abstract
Abstract A heat transfer system in which circulation of a liquid through a heat exchanger is achieved by having risers filled with fluid consisting of a liquid which partly vaporizes on heating and rises to a condensing region where a heat exchanger, positioned in close proximity to the upper ends of the risers, condenses the vapor portion of the fluid. A downcomer returns the condensed liquid to the lower ends of the risers so that continuous circulation of the fluid through the heat exchanger occurs automatically when heat is supplied to the risers.
Inventors
- 👤 W Hapgood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:20
CPC Classifications
F; F24; F24H; F24H1/00; F22; F22B; F22B1/00; F22B1/02; F22B1/08
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
117 words
A heat exchange system comprising: a thermally conductive matrix comprising a plurality of tubular members providing a conduit for fluid to be heated and rigidly interconnected by thermally conductive bodies which provide at least portions of the walls of a plurality of passageways for gaseous products of combustion, the total area of said passageways in said matrix being substantially greater than the total area of said conduit in said matrix; means for supplying fluid from the upper end of said conduit to a reservoir above said matrix; means for supplying fluid from said reservoir substantially directly to the lower end of said conduit; and means for supplying said combustion products to said passageways to heat said matrix.
Claim 2
Dependent Claim
117 words
A heat exchange system comprising: a thermally conductive matrix comprising a plurality of tubular members providing a conduit for fluid to be heated and rigidly interconnected by thermally conductive bodies which provide at least portions of the walls of a plurality of passageways for gaseous products of combustion, the total area of said passageways in said matrix being substantially greater than the total area of said conduit in said matrix; means for supplying fluid from the upper end of said conduit to a reservoir above said matrix; means for supplying fluid from said reservoir substantially directly to the lower end of said conduit; and means for supplying said combustion products to said passageways to heat said matrix.
Claim 3
Dependent Claim
31 words
The heat exchange system in accordance with claim 1 wherein said matrix comprises a plurality of layers of thermally conductive bodies positioned between adjacent portions of said conduit and bonded thereto.
Claim 4
Dependent Claim
19 words
The heat exchange system in accordance with claim 2 wherein said bodies are substantially predominantly curved in all directions.
Claim 5
Dependent Claim
35 words
The heat exchange system in accordance with claim 3 wherein the average length of said passageways is not substantially greater than twenty times the average radius of curvature of the surface areas of said bodies.
Claim 6
Dependent Claim
15 words
The heat exchange system in accordance with claim 4 wherein said bodies are substantially spheroidal.
Claim 7
Dependent Claim
28 words
The heat exchange system in accordance with claim 1 wherein said tubes and bodies are bonded together to to form a substantially cylindrical matrix having a central plenum.
Claim 8
Dependent Claim
48 words
The heat exchange system in accordance with claim 6 and means for supplying heated gases to said central plenum to transfer heat to said tubes at a rate in excess of 50,000 BTU''s per square foot per hour of the surface area of the interior of said tubes.
Claim 9
Dependent Claim
27 words
The heat exchange system in accordance with claim 7 wherein said means for supplying heated gases comprises a burner for supplying a fuel-air mixture to said plenum.
Claim 10
Dependent Claim
20 words
The heat exchange system in accordance with claim 8 wherein said burner comprises a foraminous structure extending into said plenum.
Claim 11
Dependent Claim
24 words
The heat exchange system in accordance with claim 9 wherein said burner is supplied with said fuel-air mixture in gaseous form by a blower.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-04-01 | 1977-10-01 | 1978-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-01 | 1981-10-01 | 1982-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-01 | 1985-10-01 | 1986-04-02 | $7700.00 | Window Closed / Lapsed |