Patent US4794984A successfully refreshed from Google Patents.
US4794984A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Arrangement for increasing heat transfer coefficient between a heating surface and a boiling liquid
Assignee: Individual
•
Filing: 1987-11-05
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Granted: 1989-01-03
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Expires: 2007-11-05
Abstract
Abstract A single layer cover means is disposed over and spaced apart from a heating surface for diverting vapor to flow along the heating surface, the cover means having openings to permit vapor to flow therethrough, the openings having an effective diameter equal to or greater than the distance between the heating surface and the cover means. The cover means induces an agitiating effect across the heating surface to enhance the heat transfer performance instead of forming nucleation sites. A plurality of spacer members is disposed at intervals between the heating surface and the cover means.
Inventors
- 👤 Pang-Yien Lin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 14:58
CPC Classifications
F; F28; F28F; F28F13/00; F28F13/18; F28F13/185; F28F13/187; Y; Y10; Y10S; Y10S165/00; Y10S165/911
Claims Analysis
Total Claims: 30
Claim 1
Independent Claim
97 words
An apparatus for enhancing the transfer of heat in nucleate boiling comprising: a heating wall having a heating surface; cover means which is of a single layer and separate from said heating wall, being disposed over and spaced apart from said heating surface for diverting vapor to flow along said heating surface, said cover means having opening means to permit vapor to flow out therethrough, said opening means having an effective diameter greater than an average distance between said heating surface and said cover means; and spacer means disposed between said heating surface and said cover means.
Claim 2
Independent Claim
97 words
An apparatus for enhancing the transfer of heat in nucleate boiling comprising: a heating wall having a heating surface; cover means which is of a single layer and separate from said heating wall, being disposed over and spaced apart from said heating surface for diverting vapor to flow along said heating surface, said cover means having opening means to permit vapor to flow out therethrough, said opening means having an effective diameter greater than an average distance between said heating surface and said cover means; and spacer means disposed between said heating surface and said cover means.
Claim 3
Dependent Claim
84 words
An apparatus as claimed in claim 1, wherein said opening means includes a plurality of openings which are spaced apart from each other, and the relation between the effective diameter of each of said openings and the distance between the cover means and the heating surface is expressed by: d>√s·L wherein d is the effective diameter of each of said opening, s is the distance between said cover means and said heating surface, and L is a horizontal distance between two adjacent said openings.
Claim 4
Dependent Claim
32 words
A heat transfer arrangement as claimed in claim 2, wherein said openings are disposed at an interval less than 5 times an average distance between said cover means and said heating surface.
Claim 5
Dependent Claim
36 words
An apparatus as claimed in claim 2, wherein both said heating wall and said cover means have at least one portion extending upward, and said openings are disposed at a top side of said cover means.
Claim 6
Dependent Claim
55 words
An apparatus as claimed in claim 4, wherein additional said openings are provided in said cover means below said top openings, the distance between two adjacent said openings along a line formed by the intersection of said cover means and a vertical plane perpendicular to said cover means is about 0.5 cm to 20 cm.
Claim 7
Dependent Claim
27 words
An apparatus as claimed in claim 1, wherein said cover means is spaced apart from said heating surface at an average distance of about 0.05 mm-10 mm.
Claim 8
Dependent Claim
22 words
An apparatus arrangement as claimed in claim 1, wherein said spacer means includes stubby pieces which are spaced apart from each other.
Claim 9
Dependent Claim
25 words
An apparatus as claimed in claim 7, wherein said stubby pieces are one piece with said heating surface and in contact with said cover means.
Claim 10
Dependent Claim
25 words
An apparatus as claimed in claim 7, wherein said stubby pieces are one piece with said cover means and in contact with said heating surface.
Claim 11
Dependent Claim
22 words
An apparatus as claimed in claim 7, wherein said stubby pieces are separate pieces from said cover means and said heating surface.
Claim 12
Dependent Claim
23 words
An apparatus as claimed in claim 10, wherein said stubby pieces are screw members attached to said cover means and said heating surface.
Claim 13
Dependent Claim
21 words
An apparatus as claimed in claim 7, wherein the interval between two adjacent said stubby pieces is about 0.2 mm-300 mm.
Claim 14
Dependent Claim
33 words
An apparatus as claimed in claim 12, wherein the height and the width of each of said stubby pieces is about 0.05 mm to 10 mm and 0.1 mm to 10 mm respectively.
Claim 15
Dependent Claim
53 words
An apparatus as claimed in claim 1, wherein said spacer means includes a plurality of spacer members which are formed integrally on said cover means and extend towards opposing said heating surface or said cover means, some of said spacer members being in contact with said opposing heating surface or said cover means.
Claim 16
Dependent Claim
22 words
An apparatus as claimed in claim 1, wherein said spacer means includes discrete elongated pieces which are spaced apart from each other.
Claim 17
Dependent Claim
29 words
An apparatus as claimed in claim 15, wherein said heating wall has a portion extending upward, and said elongated pieces extend in an upward direction along said heating surface.
Claim 18
Dependent Claim
24 words
An apparatus as claimed in claim 15, said elongated pieces are one piece with said cover means and in contact with said heating surface.
Claim 19
Dependent Claim
25 words
An apparatus as claimed in claim 15, wherein said elongated pieces are one piece with said heating surface and in contact with said cover means.
Claim 20
Dependent Claim
22 words
An apparatus as claimed in claim 15, wherein said elongated pieces are separate pieces from said heating surface and said cover means.
Claim 21
Dependent Claim
41 words
An apparatus as claimed in claim 15, wherein the interval between said elongated pieces is about 0.2 mm-300 mm, and the height and the width of each of said elongated pieces is about 0.05 mm-10 mm and 0.1 mm-10 mm respectively.
Claim 22
Dependent Claim
32 words
An apparatus as claimed in claim 1, wherein said heating wall has at least one portion extending upward, and said spacer means includes continuous elongated pieces extending upwardly along said upward portion.
Claim 23
Dependent Claim
34 words
An apparatus as claimed in claim 21, wherein said heating wall is a tubular wall and said spacer means includes at least one continuous flexible elongated member which is wound around said heating wall.
Claim 24
Dependent Claim
42 words
An apparatus as claimed in claim 1, wherein said cover means is a material selected from a metallic impervious material, a non-metallic impervious material, a metallic pervious material and a non-metallic pervious material having a maximum pore size of about 1.0 mm.
Claim 25
Dependent Claim
17 words
An apparatus as claimed in claim 1, wherein said cover means includes a single piece cover member.
Claim 26
Dependent Claim
17 words
An apparatus as claimed in claim 1, wherein said cover means includes a plurality of cover members.
Claim 27
Dependent Claim
21 words
An apparatus as claimed in claim 25, wherein the width of each of said cover members is greater than 4 mm.
Claim 28
Dependent Claim
34 words
An apparatus as claimed in claim 25, wherein each of said cover members is spaced apart from an adjacent said cover member to form a gap therebetween, said gap serving as said opening means.
Claim 29
Dependent Claim
30 words
An apparatus as claimed in claim 25, wherein the space between two adjacent said cover members is greater than the average distance between said heating surface and said cover members.
Claim 30
Dependent Claim
23 words
An apparatus as claimed in claim 1, wherein all of the ends of said spacer members are in contact with their opposing surface.
References Cited (Backward Citations)
JPS5211464A
Cited
US4434842A
Cited
JPS58120086A
Cited
JPS5946490A
Cited
JPS5984095A
Cited
US4602681A
Cited
JPS5993192A
Cited
JPS5993181A
Cited
US4561497A
Cited
US4619316A
Cited
US4606405A
Cited
US4653163A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-01-03 | 1992-07-04 | 1993-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-01-03 | 1996-07-04 | 1997-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-01-03 | 2000-07-04 | 2001-01-03 | $7700.00 | Window Closed / Lapsed |