US4024751A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for determining heat transfer efficiency
Assignee: Veolia WTS USA Inc
•
Filing: 1975-12-18
•
Granted: 1977-05-24
•
Expires: 1995-12-18
Abstract
Abstract Apparatus for determining the heat transfer efficiency of a heat exchanger wall is disclosed. The apparatus is designed for ease of use and simplicity and comprises heating means for imposing a heat load on a first heat transfer surface of the wall and means for determining the rate of dissipation of the heat load across the wall and into a heat exchange fluid in contact with a second heat transfer surface of the wall. By determining the rate of heat dissipation across the wall and into the heat exchange fluid the heat transfer efficiency of the wall and the overall cleanliness thereof can be evaluated.
Inventors
- 👤 Anthony C. Potrzebowski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:06
CPC Classifications
G; G01; G01K; G01K17/00; G01N; G01N25/00; G01N25/18
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
135 words
Apparatus for determining the heat transfer efficiency of a heat exchanger wall having at least a first heat transfer surface exposed to heat exchange fluid and a second heat transfer surface, said apparatus comprising: heating means located with respect to said second heat transfer surface for heating the second surface from a first temperature to a second predetermined temperature, and heat dissipation determining means associated with said heat exchanger wall for determining the rate of dissipation of a heat load across said heat exchanger wall and into said heat exchange fluid, wherein said heat dissipation determining means comprises first temperature sensing means adjacent said heating means for sensing said first and second temperatures and timer means for measuring the time for said sensed temperature to return from said second temperature to about said first temperature.
Claim 2
Dependent Claim
135 words
Apparatus for determining the heat transfer efficiency of a heat exchanger wall having at least a first heat transfer surface exposed to heat exchange fluid and a second heat transfer surface, said apparatus comprising: heating means located with respect to said second heat transfer surface for heating the second surface from a first temperature to a second predetermined temperature, and heat dissipation determining means associated with said heat exchanger wall for determining the rate of dissipation of a heat load across said heat exchanger wall and into said heat exchange fluid, wherein said heat dissipation determining means comprises first temperature sensing means adjacent said heating means for sensing said first and second temperatures and timer means for measuring the time for said sensed temperature to return from said second temperature to about said first temperature.
Claim 3
Dependent Claim
26 words
Apparatus according to claim 1, wherein said heat dissipation determining means further comprises second temperature sensing means for sensing the temperature of said heat exchange fluid.
Claim 4
Dependent Claim
36 words
Apparatus according to claim 2, wherein said heating means imposes the heat load on an area of said second heat transfer surface which is insulated so as to ensure heat dissipation to said heat exchange fluid.
Claim 5
Dependent Claim
32 words
Apparatus according to claim 3, wherein said area of said second heat transfer surface is insulated with insulating means which cover said area, said heating means and said first temperature sensing means.
Claim 6
Dependent Claim
28 words
Apparatus according to claim 2, wherein said heat dissipation determining means further comprises means for determining the difference in temperature between said first and second temperature sensing means.
Claim 7
Dependent Claim
13 words
Apparatus according to claim 3, wherein said heat dissipation determining means is automatic.
Claim 8
Dependent Claim
29 words
Apparatus according to claim 1, wherein said heat dissipation determining means further comprises differential means for determining the difference in temperature between said first and second temperature sensing means.
Claim 9
Dependent Claim
23 words
Apparatus according to claim 7, wherein said differential means comprise thermometer means connected to each of said first and second temperature sensing means.
Claim 10
Dependent Claim
13 words
Apparatus according to claim 1, wherein said heat dissipation determining means is automatic.
Claim 11
Dependent Claim
11 words
Apparatus according to claim 1, wherein said timer means is automatic.
Claim 12
Dependent Claim
30 words
Apparatus according to claim 1, wherein said heat dissipation determining means further comprises automatic differential means for determining the difference in temperature between said first and second temperature sensing means.
Claim 13
Dependent Claim
24 words
Apparatus according to claim 1, wherein said second temperature sensing means is arranged to sense a non-heat exchange temperature of said heat exchange fluid.
Claim 14
Dependent Claim
35 words
Apparatus according to claim 1, wherein said heat exchanger wall is the wall of a conduit through which said heat exchange fluid flows in a given direction in contact with said first heat transfer surface.
Claim 15
Dependent Claim
18 words
Apparatus according to claim 13, wherein said second heat transfer surface is an outside surface of said conduit.
Claim 16
Dependent Claim
15 words
Apparatus according to claim 14, wherein said heating means is coiled about said outside surface.
Claim 17
Dependent Claim
26 words
Apparatus according to claim 14, wherein said second temperature sensing is means exposed to said heat exchange fluid at a point upstream of said heating means.
Claim 18
Dependent Claim
18 words
Apparatus according to claim 13, wherein said second heat transfer surface is an outside surface of said conduit.
Claim 19
Dependent Claim
25 words
Apparatus according to claim 1, wherein said timer means times the dissipation of said heat load after the imposition of the heat load is terminated.
References Cited (Backward Citations)
SU238829A1
Cited
US2330599A
Cited
GB855658A
Cited
US3059467A
Cited
SU148553A1
Cited
US3229499A
Cited
US3372587A
Cited
US3918300A
Cited
US3913378A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-05-23 | 1980-11-22 | 1981-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-23 | 1984-11-22 | 1985-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-23 | 1988-11-22 | 1989-05-24 | $7700.00 | Window Closed / Lapsed |