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US4448239A Expired / Lapsed US ⏱️ 0.0 years remaining

Heat-pipe-diode-charged thermal

Assignee: United States Department of the Army
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Filing: 1982-04-16
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Granted: 1984-05-15
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Expires: 2002-04-16
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Abstract

Abstract Heat-pipe-diodes are used to charge a thermally-stratified heat reservoir permit enhanced preheating of feed water. Maximum available energy is automatically extracted from waste and feed streams having intermittent flow and variable temperature. The thermal reservoir comprises a plurality of thermosyphons operatively disposed in a condenser unit through which the feed water passes, and a plurality of fluidically connected heat-receiving diodes operatively disposed in an evaporator unit through which the waste stream flows.

Inventors

  • 👤 Donald K. Edwards

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-04 13:20
CPC Classifications
F; F28; F28D; F28D15/00; F28D15/02; F28D15/0266; F28D15/0275

Claims Analysis

Total Claims: 7
Claim 1
Independent Claim 368 words
A heat-pipe-diode charged thermal reservoir which comprises: tank means for holding a reserve of heated feed water, which includes; a feed water vessel having thermally insulated walls; an outlet connection for hot feed water operatively disposed on an upper end of said vessel; an inlet connection for incoming cold feed water operatively disposed on a lower end of said vessel; and a baffle member fixedly positioned on the bottom of said vessel opposite said inlet connection, said baffle member helping to stratify feed water in said vessel; means for stratifying said feed water in said tank means, which includes; a plurality of horizontally spaced apart screens supported from the interior walls of said vessel; means for holding a waste stream remote from said tank means, which includes; a compartmented evaporator tank, operatively disposed at a lower level than said tank means, having a waste fluid inlet connected to a top side of a first compartment and a waste tank output connection positioned at a lower level on the side of another compartment; baffle means for dividing said waste stream flow and for permitting overflow of waste stream from said first compartment to other compartments, which includes; a plurality of baffle walls for dividing said tank into multiple decreasingly sized compartments for permitting waste fluid to exit by gravity in the direction of the waste fluid flow; means for automatically extracting heat from said waste stream and for using said heat to preheat incoming and stored feed water; which includes a plurality of inclined heat-pipe-diode condenser members operatively disposed between each layer of said means for stratifying; a plurality of heat receiving members fluidically connected to said condenser member, and horizontally disposed in separate sections of said compartments evaporator tank; a plurality of vertical pipes fluidically connecting each of said condenser members to a receiving member, said condenser member located in the hottest and upper stratum of said feed water vessel is fluidically coupled to a receiving member located in the hottest compartment of said evaporator tank, each progressively cooler condenser member being fluidically connected to a progressively cooler receiving member in said evaporator tank; and a heat transfer fluid sealed in each of said condensor and receiving members.
Claim 2
Dependent Claim 368 words
A heat-pipe-diode charged thermal reservoir which comprises: tank means for holding a reserve of heated feed water, which includes; a feed water vessel having thermally insulated walls; an outlet connection for hot feed water operatively disposed on an upper end of said vessel; an inlet connection for incoming cold feed water operatively disposed on a lower end of said vessel; and a baffle member fixedly positioned on the bottom of said vessel opposite said inlet connection, said baffle member helping to stratify feed water in said vessel; means for stratifying said feed water in said tank means, which includes; a plurality of horizontally spaced apart screens supported from the interior walls of said vessel; means for holding a waste stream remote from said tank means, which includes; a compartmented evaporator tank, operatively disposed at a lower level than said tank means, having a waste fluid inlet connected to a top side of a first compartment and a waste tank output connection positioned at a lower level on the side of another compartment; baffle means for dividing said waste stream flow and for permitting overflow of waste stream from said first compartment to other compartments, which includes; a plurality of baffle walls for dividing said tank into multiple decreasingly sized compartments for permitting waste fluid to exit by gravity in the direction of the waste fluid flow; means for automatically extracting heat from said waste stream and for using said heat to preheat incoming and stored feed water; which includes a plurality of inclined heat-pipe-diode condenser members operatively disposed between each layer of said means for stratifying; a plurality of heat receiving members fluidically connected to said condenser member, and horizontally disposed in separate sections of said compartments evaporator tank; a plurality of vertical pipes fluidically connecting each of said condenser members to a receiving member, said condenser member located in the hottest and upper stratum of said feed water vessel is fluidically coupled to a receiving member located in the hottest compartment of said evaporator tank, each progressively cooler condenser member being fluidically connected to a progressively cooler receiving member in said evaporator tank; and a heat transfer fluid sealed in each of said condensor and receiving members.
Claim 3
Dependent Claim 21 words
A thermal reservoir as recited in claim 1 wherein said heat transfer fluid includes a readily condensable gas such as ammonia.
Claim 4
Dependent Claim 25 words
A thermal reservoir as recited in claim 2 wherein the longitudinal axes of said plurality of heat-pipe-diode condenser members are inclined at an acute angle.
Claim 5
Dependent Claim 22 words
A thermal reservoir as recited in claim 3 wherein said plurality of heat-pipe-diode condenser members include a plurality of fixedly attached fins.
Claim 6
Dependent Claim 23 words
A thermal reservoir as recited in claim 8 wherein said plurality of heat receiving members include a plurality of fins fixedly attached thereto.
Claim 7
Dependent Claim 26 words
A thermal reservoir as recited in claim 4 wherein said plurality of heat-pipe-diode condenser and receiving members, and vertical pipes are made of a ferrous material.

References Cited (Backward Citations)

DE2754981A1 Cited
JPS56160534A Cited
US4380993A Cited
EP0045481A1 Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1987-05-15 1987-11-14 1988-05-15 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1991-05-15 1991-11-14 1992-05-15 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1995-05-15 1995-11-14 1996-05-15 $7700.00 Window Closed / Lapsed

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