Patent US3612172A successfully refreshed from Google Patents.
US3612172A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air-cooled condenser
Assignee: Borsig GmbH
•
Filing: 1969-09-22
•
Granted: 1971-10-12
•
Expires: 1989-09-22
Abstract
Abstract An air-cooled condenser in which pipes extending between an upper header and a lower header are divided into upper and lower axial sections by the upper ends of condensate tubes which lead downwardly to a condensate chamber. Steam is supplied through the headers to opposite ends of the pipes and condensate from the upper section of each pipe draining down the respective tube to the condensate chamber which condensate from the lower section of each pipe drains into the lower header. A fan causes cooling air to pass over the pipes which, for efficient heat transfer, may be finned.
Inventors
- 👤 Dietrich Dohnt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 15:31
CPC Classifications
F; F28; F28B; F28B1/00; F28B1/06; F28B9/00; F28B9/005; F28B2001/065; Y; Y10; Y10S; Y10S165/00; Y10S165/184; Y10S165/197
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
171 words
A condenser having an upper header means and a lower header means, conduit means connected to said header means for supplying steam thereto, pipe bundle means connected to and extending between said header means, and fan means operable for causing cooling airflow through said pipe bundle means, a condensate discharge tube extending into each pipe of said pipe bundle means from the lower end of the respective pipe, the upper end of each discharge tube engaging the inside of the respective pipe and dividing the pipe into upper and lower axial sections whereby steam to be condensed flows in countercurrent direction simultaneously from said header means into both ends of said pipes, condensate chamber means connected to the lower ends of said tubes to receive from said tubes the condensate from the upper sections of said pipes, the condensate from the lower sections of said pipes drawing from said pipes into said lower header means, and means for withdrawing condensate from said condensate chamber means and from said lower header means.
Claim 2
Dependent Claim
171 words
A condenser having an upper header means and a lower header means, conduit means connected to said header means for supplying steam thereto, pipe bundle means connected to and extending between said header means, and fan means operable for causing cooling airflow through said pipe bundle means, a condensate discharge tube extending into each pipe of said pipe bundle means from the lower end of the respective pipe, the upper end of each discharge tube engaging the inside of the respective pipe and dividing the pipe into upper and lower axial sections whereby steam to be condensed flows in countercurrent direction simultaneously from said header means into both ends of said pipes, condensate chamber means connected to the lower ends of said tubes to receive from said tubes the condensate from the upper sections of said pipes, the condensate from the lower sections of said pipes drawing from said pipes into said lower header means, and means for withdrawing condensate from said condensate chamber means and from said lower header means.
Claim 3
Dependent Claim
53 words
A condenser according to claim 1 in which said steam flows axially in said header means and the length of said pipe sections varies in increasing direction in conformity with the length of travel of the steam prior to entry into pipes along said header means to the end of the respective section.
Claim 4
Dependent Claim
53 words
A condenser according to claim 1 in which said steam flows axially in said header means and the length of said pipe sections varies in decreasing direction in conformity with the length of travel of the steam prior to entry into pipes along said header means to the end of the respective section.
Claim 5
Dependent Claim
87 words
A condenser according to claim 1 in which steam is supplied to about the middle of the length of said lower header means for flow outwardly therein toward the ends and flows from the ends thereof to the ends of said upper header means and then toward the middle of the length of said upper header means, the length of the said sections of said pipes into which steam flows progressively increasing in the direction of steam flow prior to entry into pipes through said header means.
Claim 6
Dependent Claim
59 words
A condenser according to claim 1 in which each said tube has aperture means therein immediately below the region of engagement of the upper end of the tube with the respective pipe whereby inert air from both collectively withdrawn axial sections of each pipe passes into the respective condensate discharge tube and downwardly therethrough to said condensate chamber means.
Claim 7
Dependent Claim
47 words
A condenser according to claim 1 in which said pipe bundle means comprise pipe sections longer in differing pipes displaced from each other in the direction of airflow through the bundle means, the upper sections of said pipes varying in length in the direction of said airflow.
Claim 8
Dependent Claim
58 words
A condenser according to claim 1 in which each of said tubes comprises a first upper portion which at its upper end engages a respective pipe and a second lower portion extending into said condensate chamber means, said respective portions being in slidable telescopic engagement and thereby compensating for differential thermal expansion of individual pipes in the condenser.
Claim 9
Dependent Claim
17 words
A condenser according to claim 1 in which said pipes individually are finned for each bundle means.
Claim 10
Dependent Claim
57 words
A condenser according to claim 1 in which said lower header interconnected also to bypass means is in the form of two laterally spaced lower headers, said pipes converging in the upward direction from said lower headers, said fan discharging air upwardly into the space confined between said pipes and flowing laterally over and between said pipes.
Claim 11
Dependent Claim
30 words
A condenser according to claim 6 in which said upper respectively sections of said pipes individually increase in length progressively in the direction of airflow through said pipe bundle means.
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) | 1974-10-11 | 1975-04-12 | 1975-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-11 | 1979-04-12 | 1979-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-11 | 1983-04-12 | 1983-10-12 | $7700.00 | Window Closed / Lapsed |