US4153105A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reversible latent heat storage method, and reversible latent heat accumulator
Assignee: US Philips Corp
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Filing: 1978-03-20
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Granted: 1979-05-08
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Expires: 1998-03-20
Abstract
Abstract A system for utilizing latent heat stored in a crystallizable liquid heat storage medium subject to super-cooling, wherein the storage medium is continuously circulated past a heat exchanger positioned in the upper portion of an enclosed space containing a body of such storage medium to effect super-cooling thereof, then past a bed of seed crystals in the lower portion of such space to effect partial crystallization thereof, and then back past the heat exchanger.
Inventors
- 👤 Johann Schroder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:00
CPC Classifications
F; F24; F24F; F24F5/00; F24F5/0007; F24F5/0017; F24F5/0021; C; C09; C09K; C09K5/00; C09K5/02; C09K5/06; C09K5/063; F24D; F24D11/00; F24D11/02; F24D11/0257; F24F3/00; F25; F25B; F25B13/00; F28; F28D; F28D20/00; F28D20/02; F28D20/028; F25B2400/00; F25B2400/24; Y; Y02; Y02B; Y02B10/00; Y02B10/70; Y02B30/00; Y02B30/13; Y02E; Y02E60/00; Y02E60/14; Y02P; Y02P20/00; Y02P20/10; Y10; Y10S; Y10S165/00; Y10S165/902
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
155 words
Apparatus for utilizing latent heat stored in a crystallizable liquid heat storage medium subject to super-cooling, which comprises an enclosed reservoir containing a body of said storage medium, a heat exchanger associated with said enclosed reservoir, means providing a bed of seed crystals in the lower portion of said enclosed reservoir, means for maintaining the heat exchanger at a temperature below the melting point of the storage medium, and means for continously circulating the storage medium past the heat exchanger to effect supercooling thereof and past the seed crystal bed means to effect partial crystallization thereof and back past the heat exchanger, said circulating means being operable so as to maintain the flow rate of the storage medium past the heat exchanger at a sufficiently high value so that no or substantially no crystallization of the storage medium occurs near the heat exchanger and no or substantially no crystals are formed on the heat exchanger.
Claim 2
Dependent Claim
155 words
Apparatus for utilizing latent heat stored in a crystallizable liquid heat storage medium subject to super-cooling, which comprises an enclosed reservoir containing a body of said storage medium, a heat exchanger associated with said enclosed reservoir, means providing a bed of seed crystals in the lower portion of said enclosed reservoir, means for maintaining the heat exchanger at a temperature below the melting point of the storage medium, and means for continously circulating the storage medium past the heat exchanger to effect supercooling thereof and past the seed crystal bed means to effect partial crystallization thereof and back past the heat exchanger, said circulating means being operable so as to maintain the flow rate of the storage medium past the heat exchanger at a sufficiently high value so that no or substantially no crystallization of the storage medium occurs near the heat exchanger and no or substantially no crystals are formed on the heat exchanger.
Claim 3
Dependent Claim
20 words
Apparatus according to claim 1, in which the heat exchanger is positioned in the upper portion of said enclosed reservoir.
Claim 4
Dependent Claim
17 words
Apparatus according to claim 1, which includes means to remove any crystal formation on the heat exchanger.
Claim 5
Dependent Claim
27 words
Apparatus according to claim 3, in which the crystal formation-removing means comprises an inflatable envelope surrounding the heat exchanger, and which includes means to inflate said envelope.
Claim 6
Dependent Claim
30 words
Apparatus according to claim 3, in which the crystal formation-removing means comprises means to briefly raise the temperature of the heat exchanger above the melting point of the storage medium.
Claim 7
Dependent Claim
33 words
Apparatus according to claim 5, in which the heat exchanger is included in a heat pump, and which includes means to reverse the heat pump to raise the temperature of the heat exchanger.
Claim 8
Dependent Claim
27 words
Apparatus according to claim 1, in which guide means is arranged in the enclosed reservoir for conducting the flow of the storage medium past the heat exchanger.
Claim 9
Dependent Claim
28 words
Apparatus according to claim 1, in which the enclosed reservoir is provided with a device for compensating for the pressure and the level of the storage medium therein.
Claim 10
Dependent Claim
21 words
Apparatus according to claim 1, in which the storage medium comprises an aqueous solution of 44 to 48% by weight KF.
Claim 11
Dependent Claim
18 words
Apparatus according to claim 1, in which the storage medium comprises Na 2 SO 4 .10H 2 O.
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) | 1982-05-07 | 1982-11-06 | 1983-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-05-07 | 1986-11-06 | 1987-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-05-07 | 1990-11-06 | 1991-05-08 | $7700.00 | Window Closed / Lapsed |