US4050506A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stepwise turndown by closing heat exchanger passageways responsive to measured flow
Assignee: Phillips Petroleum Co
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Filing: 1976-03-25
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Granted: 1977-09-27
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Expires: 1996-03-25
Abstract
Abstract In a cryogenic plant utilizing a liquid sparged into a cold vapor in heat exchange relationship with hotter vapor, variations in the load in terms of the volume of hot vapor are compensated for by a stepwise complete closing of a uniformly-spaced-apart fraction of the cold vapor passageways.
Inventors
- 👤 William M. Small
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 04:45
CPC Classifications
F; F28; F28F; F28F27/00; F28F27/02; F25; F25J; F25J1/00; F25J1/0002; F25J1/0022; F25J1/003; F25J1/0047; F25J1/0052; F25J1/02; F25J1/0243; F25J1/0244; F25J1/0245; F25J1/0257; F25J1/0262; F25J1/0269; F25J1/0271; F25J1/0272; F25J5/00; F25J5/002; F25J2290/00; F25J2290/32; Y; Y10; Y10S; Y10S62/00; Y10S62/902; Y10S62/903
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
223 words
A plate type heat exchanger apparatus comprising in combination: a plurality of elongated metallic plates disposed in spaced relationship defining a plurality of elongated platelike passages in spaces there-between; said plurality of passages including a first group of passages and a second group of passages, the passages of said first group being disposed in alternate relationship with said second group so as to be in heat exchange relationship therewith; end means extending between said plates along the periphery thereof defining the width and length of said passages; first inlet header communicating with said frist group of passages; first outlet means for removing fluid from said first group of passages, a second header means having associated therewith a sparger means for introducing a vapor into said second group of passages and sparging a liquid into said vapor, said second header means being divided into means to separately communicate with at least two fractions of the total number of passages in said second group of passages; second outlet means for removing spent refrigerant from said second group of passages; means to measure the flow of fluid to said first inlet header; and means to shut off flow through a uniformly spaced fraction of the total number of passages in said second group of passages responsive to a signal generated by said means to measure flow.
Claim 2
Dependent Claim
223 words
A plate type heat exchanger apparatus comprising in combination: a plurality of elongated metallic plates disposed in spaced relationship defining a plurality of elongated platelike passages in spaces there-between; said plurality of passages including a first group of passages and a second group of passages, the passages of said first group being disposed in alternate relationship with said second group so as to be in heat exchange relationship therewith; end means extending between said plates along the periphery thereof defining the width and length of said passages; first inlet header communicating with said frist group of passages; first outlet means for removing fluid from said first group of passages, a second header means having associated therewith a sparger means for introducing a vapor into said second group of passages and sparging a liquid into said vapor, said second header means being divided into means to separately communicate with at least two fractions of the total number of passages in said second group of passages; second outlet means for removing spent refrigerant from said second group of passages; means to measure the flow of fluid to said first inlet header; and means to shut off flow through a uniformly spaced fraction of the total number of passages in said second group of passages responsive to a signal generated by said means to measure flow.
Claim 3
Dependent Claim
22 words
Apparatus according to claim 1 wherein flow through said fraction of said second passages is shut off by closing an inlet thereto.
Claim 4
Dependent Claim
22 words
Apparatus according to claim 1 wherein flow through said fraction of said second passage is shut off by closing an exit therefrom.
Claim 5
Dependent Claim
20 words
Apparatus according to claim 2 wherein said fraction of said passages closed off is one of 1/2, 1/3 or 1/4.
Claim 6
Dependent Claim
45 words
Apparatus according to claim 2 wherein said heat exchanger is in parallel with at least one similar heat exchange means, comprising in addition means to shut off flow through a fraction of the second passages in said at least one other similar heat exchange means.
Claim 7
Dependent Claim
52 words
Apparatus according to claim 5 wherein there are at least three parallel heat exchange means and wherein each heat exchanger has provision for turndown of at least 1/3 fractions of the second passages therein so as to give a total turndown ratio for the system in increments of as little as 1/9.
Claim 8
Dependent Claim
38 words
Apparatus according to claim 2 wherein said means to measure flow comprises a linear flow transmitter and wherein said means to shut off said fraction of said second passages comprises a flow conroller operably connected with a valve.
Claim 9
Dependent Claim
223 words
A plate type heat exchanger apparatus comprising in combination: a plurality of elongated metallic plates disposed in spaced relationship defining a plurality of elongated platelike passages in spaces therebetween; said plurality of passages including a first group of passages and a second group of passages, the passages of said first group being disposed in alternate relationship with said second group so as to be in heat exchange relationship therewith; end means extending between said plates along the periphery thereof defining the width and length of said passages; first inlet header communicating with said first group of passages; first outlet means for removing fluid from said first group of passages; a second header means having associated therewith a sparger means for introducing a vapor into said second group of passages and sparging a liquid into said vapor, said second header means being divided into means to separately communicate with at least two fractions of the total number of passages in said second group of passages; second outlet means for removing spent refrigerant from said second group of passages; means to measure the flow of liquid to said second inlet header; and means to shut off flow through a uniformly spaced fraction of the total number of passages in said second group of passages responsive to a signal generated by said means to measure flow.
Claim 10
Dependent Claim
223 words
A plate type heat exchanger apparatus comprising in combination: a plurality of elongated metallic plates disposed in spaced relationship defining a plurality of elongated platelike passages in spaces therebetween; said plurality of passages including a first group of passages and a second group of passages, the passages of said first group being disposed in alternate relationship with said second group so as to be in heat exchange relationship therewith; end means extending between said plates along the periphery thereof defining the width and length of said passages; first inlet header communicating with said first group of passages; first outlet means for removing fluid from said first group of passages; a second header means having associated therewith a sparger means for introducing a vapor into said second group of passages and sparging a liquid into said vapor, said second header means being divided into means to separately communicate with at least two fractions of the total number of passages in said second group of passages; second outlet means for removing spent refrigerant from said second group of passages; means to measure the flow of liquid to said second inlet header; and means to shut off flow through a uniformly spaced fraction of the total number of passages in said second group of passages responsive to a signal generated by said means to measure flow.
Claim 11
Dependent Claim
26 words
An apparatus according to claim 8 wherein said means to shut off flow is means to close off an exit to said spaced-apart fraction of passages.
Claim 12
Dependent Claim
26 words
An apparatus according to claim 8 wherein said means to shut off flow is means to close off an inlet to said spaced-apart fraction of passages.
References Cited (Backward Citations)
US3047274A
Cited
US3067766A
Cited
US3195622A
Cited
US3212277A
Cited
US3167113A
Cited
US3212278A
Cited
US3158010A
Cited
US3406745A
Cited
US3450105A
Cited
US3563303A
Cited
US3587731A
Cited
US3895676A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-09-26 | 1981-03-28 | 1981-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-26 | 1985-03-28 | 1985-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-26 | 1989-03-28 | 1989-09-27 | $7700.00 | Window Closed / Lapsed |