US4237964A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat exchange process with heat accumulation
Assignee: IFP Energies nouvelles
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Filing: 1979-06-05
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Granted: 1980-12-09
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Expires: 1999-06-05
Abstract
Abstract System for storing thermal energy obtained from a heat source operable in a discontinuous manner, such as a solar collector, comprising the successive steps of using this thermal energy to raise the temperature of a solid substance, dispersed in a liquid, above its melting point so as to obtain an emulsion of said substance in said liquid and of using a cold source in thermal exchange with said emulsion to decrease the temperature of said emulsion so as to obtain a dispersion of solid substance in the liquid and further comprising means for storing the obtained emulsion or dispersion under adiabatic conditions before proceeding to the following step.
Inventors
- 👤 Joseph Larue
- 👤 Alexandre Rojey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:27
CPC Classifications
C; C09; C09K; C09K5/00; C09K5/02; C09K5/06; F; F28; F28D; F28D20/00; F28D20/02; F28F; F28F23/00; Y; Y02; Y02E; Y02E60/00; Y02E60/14; Y02E70/00; Y02E70/30; Y10; Y10S; Y10S126/00; Y10S126/907; Y10S126/908
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
158 words
A heat exchange process comprising a thermal storage step, which comprises repeatedly conducting the following successive steps: (a) the temperature of a dispersed substance (A) in solid state in a liquid (B) is raised by thermal exchange with a heat source to above the melting temperature of said substance (A) so as to obtain an emulsion of melted substance (A) in liquid (B), and then (b) the temperature of the emulsion of the melted substance (A) in liquid (B) is allowed to decrease, by thermal exchange with a cold source, to below the temperature of solidification of the melted substance (A) so as to obtain a dispersion of the solid substance (A) in liquid (B), said process being remarkable in that, after at least one step (a) or one step (b), the obtained emulsion or dispersion is stored under adiabatic conditions before proceeding to the following step, the process beginning with a step (a) or a step (b).
Claim 2
Dependent Claim
158 words
A heat exchange process comprising a thermal storage step, which comprises repeatedly conducting the following successive steps: (a) the temperature of a dispersed substance (A) in solid state in a liquid (B) is raised by thermal exchange with a heat source to above the melting temperature of said substance (A) so as to obtain an emulsion of melted substance (A) in liquid (B), and then (b) the temperature of the emulsion of the melted substance (A) in liquid (B) is allowed to decrease, by thermal exchange with a cold source, to below the temperature of solidification of the melted substance (A) so as to obtain a dispersion of the solid substance (A) in liquid (B), said process being remarkable in that, after at least one step (a) or one step (b), the obtained emulsion or dispersion is stored under adiabatic conditions before proceeding to the following step, the process beginning with a step (a) or a step (b).
Claim 3
Dependent Claim
16 words
A process according to claim 1 wherein the storage is performed at least after step (a).
Claim 4
Dependent Claim
16 words
A process according to claim 1, wherein the storage is performed at least after step (b).
Claim 5
Dependent Claim
13 words
A process according to claim 1, wherein the process begins with step (a).
Claim 6
Dependent Claim
13 words
A process according to claim 1, wherein the process begins with step (b).
Claim 7
Dependent Claim
42 words
A process according to claim 1 wherein substance (A) and liquid (B) have a mutual solubility lower than 5% by weight, the proportion of substance (A) dispersed and/or emulsified being at least 5% of the total weight of the dispersion and/or emulsion.
Claim 8
Dependent Claim
14 words
A process according to claim 6, wherein said proportion is from 10 to 70%.
Claim 9
Dependent Claim
17 words
A process according to claim 1 wherein the dispersion and/or emulsion contains at least one surface-active agent.
Claim 10
Dependent Claim
70 words
A process according to claim 2, wherein substance (A) is naphthalene, an organic acid, alpha-naphthol, 2,4,6-tri-bromophenol, paradichlorobenzene, parachloronitrobenzene, orthonitroaniline, diphenyl, phenanthrene, benzil, a heavy paraffin, an inorganic salt or a mixture of some of these products and liquid (B) is water, ethylene glycol, diethylene glycol, glycerol, polyethylene glycol, a saturated alcohol, a saturated or unsaturated hydrocarbon, a halogenated hydrocarbon, an aromatic hydrocarbon or a mixture of some of these products.
Claim 11
Dependent Claim
64 words
A process according to claim 3, wherein substance (A) is water, an inorganic salt, a saturated or unsaturated hydrocarbon, a halogenated hydrocarbon or a mixture of some of these products and liquid (B) is water, ethylene glycol, diethylene glycol, glycerol, polyethylene glycol, a saturated alcohol, a saturated or unsaturated hydrocarbon, a halogenated hydrocarbon, an aromatic hydrocarbon or a mixture of some of these products.
Claim 12
Dependent Claim
14 words
A process according to claim 2 wherein the heat source is a solar collector.
Claim 13
Dependent Claim
15 words
A process according to claim 3, wherein the cold source is external air or water.
Claim 14
Dependent Claim
20 words
A process according to claim 1, wherein the diameter of the particles of dispersed phase is from 0.1 to 10μ.
Claim 15
Dependent Claim
24 words
A process according to claim 2, wherein the emulsion and/or dispersion is formed of a linear paraffin, water and polyglycol ether of fatty alcohol.
Claim 16
Dependent Claim
15 words
A process according to claim 11 wherein the emulsion directly circulates in the solar collector.
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) | 1983-12-09 | 1984-06-09 | 1984-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-12-09 | 1988-06-09 | 1988-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-12-09 | 1992-06-09 | 1992-12-09 | $7700.00 | Window Closed / Lapsed |