Patent US4094355A successfully refreshed from Google Patents.
US4094355A
Expired / Lapsed
US
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Heat recovery process
Assignee: Shell USA Inc
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Filing: 1976-09-23
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Granted: 1978-06-13
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Expires: 1996-09-23
Abstract
Abstract Process for recovery of heat characterized by the concentration of heat from a heat source and transfer of the heat to raise the temperature of a heat receiving medium above that of the heat source.
Inventors
- 👤 George C. Blytas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:04
CPC Classifications
F; F25; F25B; F25B30/00; F01; F01K; F01K5/00; F01K5/02
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
142 words
A process for transferring thermal energy comprising contacting steam and a water absorbent solution in a first contact zone under conditions to absorb water, dilute the solution, and raise the temperature of the solution, the solution being in indirect heat exchange with an aqueous stream and raising the temperature of the aqueous stream and converting at least the bulk of the aqueous stream to steam, passing diluted solution from the first contact zone to a second contact zone, passing the aqueous stream of raised temperature produced in the first contact zone to a second contact zone wherein the stream is contacted with the diluted solution from the first contact zone, under conditions to absorb water and heavily dilute the solution, and raise further the temperature of the solution, and transferring heat from the heavily diluted solution to a medium to be heated.
Claim 2
Dependent Claim
142 words
A process for transferring thermal energy comprising contacting steam and a water absorbent solution in a first contact zone under conditions to absorb water, dilute the solution, and raise the temperature of the solution, the solution being in indirect heat exchange with an aqueous stream and raising the temperature of the aqueous stream and converting at least the bulk of the aqueous stream to steam, passing diluted solution from the first contact zone to a second contact zone, passing the aqueous stream of raised temperature produced in the first contact zone to a second contact zone wherein the stream is contacted with the diluted solution from the first contact zone, under conditions to absorb water and heavily dilute the solution, and raise further the temperature of the solution, and transferring heat from the heavily diluted solution to a medium to be heated.
Claim 3
Dependent Claim
32 words
The method of claim 1 wherein at least a portion of the steam employed in the first contact zone is produced from water in indirect heat exchange with a thermal energy source.
Claim 4
Dependent Claim
20 words
The method of claim 2 wherein the heavily diluted absorbent solution is regenerated and returned to the first contact zone.
Claim 5
Dependent Claim
18 words
The method of claim 3 wherein the thermal energy source supplies heat for regeneration of the heavily-diluted absorbent.
Claim 6
Dependent Claim
23 words
The method of claim 4 wherein the medium to be heated is a liquid pre-heated by heat exchange with the thermal energy source.
Claim 7
Dependent Claim
23 words
The method of claim 5 wherein the thermal energy source is used to preheat the aqueous stream supplied to the first contact zone.
Claim 8
Dependent Claim
13 words
The method of claim 1 wherein the water absorbent solution contains an electrolyte.
Claim 9
Dependent Claim
14 words
The method of claim 1 wherein the water absorbent solution contains a non-volatile alcohol.
Claim 10
Dependent Claim
14 words
The method of claim 1 wherein the water absorbent solution contains a lithium halide.
Claim 11
Dependent Claim
13 words
The method of claim 1 wherein the water absorbent solution contains lithium bromide.
Claim 12
Dependent Claim
16 words
The method of claim 1 wherein the water absorbent solution contains lithium bromide and calcium bromide.
Claim 13
Dependent Claim
13 words
The method of claim 1 wherein the water absorbent solution contains ethylene glycol.
Claim 14
Dependent Claim
12 words
The method of claim 1 wherein the water absorbent solution contains glycerin.
Claim 15
Dependent Claim
13 words
The method of claim 2 wherein the water absorbent solution contains an electrolyte.
Claim 16
Dependent Claim
14 words
The method of claim 2 wherein the water absorbent solution contains a non-volatile alcohol.
Claim 17
Dependent Claim
14 words
The method of claim 2 wherein the water absorbent solution contains a lithium halide.
Claim 18
Dependent Claim
13 words
The method of claim 2 wherein the water absorbent solution contains lithium bromide.
Claim 19
Dependent Claim
16 words
The method of claim 2 wherein the water absorbent solution contains lithium bromide and calcium bromide.
Claim 20
Dependent Claim
13 words
The method of claim 2 wherein the water absorbent solution contains ethylene glycol.
Claim 21
Dependent Claim
12 words
The method of claim 2 wherein the water absorbent solution contains glycerin.
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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) | 1981-06-12 | 1981-12-12 | 1982-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-06-12 | 1985-12-12 | 1986-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-06-12 | 1989-12-12 | 1990-06-13 | $7700.00 | Window Closed / Lapsed |