US3621905A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of improving the heat transport in a tube of an evaporator or other cooking apparatus
Assignee: Rederi Nordstjernan AB
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Filing: 1970-02-03
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Granted: 1971-11-23
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Expires: 1990-02-03
Abstract
Abstract This invention improves the heat transport in a tube of, for example, an evaporator in that the preheating zone for heating a fluid supplied at the lower tube end during its upward flow is shortened by supplying a solid phase of particles to the fluid and maintaining it fluidizing in a particle bed by the upward flow of the fluid.
Inventors
- 👤 Bengt Hedstrom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:50
CPC Classifications
F; F22; F22B; F22B37/00; F22B37/02
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
93 words
In a method for improving the volatilization capacity for a liquid flowing upwards in a tube having a lower preheating zone merging upwards into a boiling zone, the liquid being heated during its upward flow through the preheating zone, the improvement comprising supporting a bed of solid particles in the tube, and passing the liquid upwardly through the bed of particles at a sufficient flow rate to maintain the bed fluidized in at least the preheating zone, thereby extending the boiling zone downwardly in the tube and increasing the rate of heat transfer.
Claim 2
Dependent Claim
93 words
In a method for improving the volatilization capacity for a liquid flowing upwards in a tube having a lower preheating zone merging upwards into a boiling zone, the liquid being heated during its upward flow through the preheating zone, the improvement comprising supporting a bed of solid particles in the tube, and passing the liquid upwardly through the bed of particles at a sufficient flow rate to maintain the bed fluidized in at least the preheating zone, thereby extending the boiling zone downwardly in the tube and increasing the rate of heat transfer.
Claim 3
Dependent Claim
21 words
A method according to claim 1 wherein the fluidized bed of particles are maintained at a selected level within the tube.
Claim 4
Dependent Claim
32 words
A method according to claim 1 further comprising supporting a plurality of beds of solid particles in the tube and directing the liquid through the beds of particles to fluidize the particles.
References Cited (Backward Citations)
US2895719A
Cited
US3075580A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-22 | 1975-05-24 | 1975-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-22 | 1979-05-24 | 1979-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-22 | 1983-05-24 | 1983-11-23 | $7700.00 | Window Closed / Lapsed |