US4029142A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat exchanger
Assignee: US Philips Corp
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Filing: 1975-11-19
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Granted: 1977-06-14
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Expires: 1995-11-19
Abstract
Abstract A heat exchanger (air preheater) comprising two series-connected sections, the section comprising the flue gas outlet having double-walled partitions with intermediate spaces in which a vaporizable medium is present for isothermalizing the said partitions in the flow direction in order to prevent the deposition of corrosive substances such as sulphur compounds.
Inventors
- 👤 Henricus Cornelis Johannes van Beukering
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 07:05
CPC Classifications
F; F02; F02G; F02G1/00; F02G1/04; F02G1/043; F02G1/053; F02G1/057; F28; F28D; F28D15/00; F28D15/02; F28D15/0233; F28D15/04; F28D7/00; F28D7/10; F28D7/103; F28D7/106; F02G2258/00; F02G2258/10; Y; Y10; Y10S; Y10S165/00; Y10S165/909; Y10S165/921
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
157 words
A heat exchanger, particularly suitable as a preheater for hot-gas engines, hot gas turbines and the like, comprising two series connected sections each comprising at least one hollow tubular member defining a duct through which a flue gas to be cooled can flow, a flue gas inlet connected to one end of said member in one of said sections, a flue gas outlet connected to the other end of said member in the other of said sections, at least one tube defining a duct through which a medium to be heated can flow, heat-transmitting partitions separating the flue gas duct and the medium duct, the partitions of the section the flue gas duct of which connects to the flue gas outlet being of a double-walled construction defining intermediate spaces there between, and a vaporizable heat transport medium in said intermediate spaces for isothermalizing said partitions in the flow direction during operation by way of an evaporation/condensation cycle.
Claim 2
Dependent Claim
157 words
A heat exchanger, particularly suitable as a preheater for hot-gas engines, hot gas turbines and the like, comprising two series connected sections each comprising at least one hollow tubular member defining a duct through which a flue gas to be cooled can flow, a flue gas inlet connected to one end of said member in one of said sections, a flue gas outlet connected to the other end of said member in the other of said sections, at least one tube defining a duct through which a medium to be heated can flow, heat-transmitting partitions separating the flue gas duct and the medium duct, the partitions of the section the flue gas duct of which connects to the flue gas outlet being of a double-walled construction defining intermediate spaces there between, and a vaporizable heat transport medium in said intermediate spaces for isothermalizing said partitions in the flow direction during operation by way of an evaporation/condensation cycle.
Claim 3
Dependent Claim
31 words
A heat exchanger as claimed in claim 1, including a capillary structure for the transport of heat transport medium condensate by capillary action on the inner walls of the intermediate spaces.
Claim 4
Dependent Claim
19 words
A heat exchanger as claimed in claim 1 wherein the intermediate spaces are in open communication with each other.
References Cited (Backward Citations)
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Cited
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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) | 1980-06-13 | 1980-12-13 | 1981-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-06-13 | 1984-12-13 | 1985-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-06-13 | 1988-12-13 | 1989-06-14 | $7700.00 | Window Closed / Lapsed |