GB1433803A - Fouling measuing device - Google Patents
Fouling measuing deviceInfo
- Publication number
- GB1433803A GB1433803A GB1861873A GB1861873A GB1433803A GB 1433803 A GB1433803 A GB 1433803A GB 1861873 A GB1861873 A GB 1861873A GB 1861873 A GB1861873 A GB 1861873A GB 1433803 A GB1433803 A GB 1433803A
- Authority
- GB
- United Kingdom
- Prior art keywords
- probe
- voltage
- temperature
- variations
- current
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
- G01N27/14—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of an electrically-heated body in dependence upon change of temperature
- G01N27/18—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of an electrically-heated body in dependence upon change of temperature caused by changes in the thermal conductivity of a surrounding material to be tested
Landscapes
- Chemical & Material Sciences (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Electrochemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Biochemistry (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Measurement Of Resistance Or Impedance (AREA)
- Measuring Temperature Or Quantity Of Heat (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
- Investigating Or Analyzing Materials Using Thermal Means (AREA)
Abstract
1433803 Measuring surface fouling electrically U O P Inc 18 April 1973 [20 April 1972] 18618/73 Heading G1N Apparatus for measuring fouling comprises a test specimen defining a resistive probe 3 of which the electrical resistance is temperature dependent; a constant current source 1; a current sensor 22 and voltage sensor 47. The voltage signal at sensor 47, variations of which represent changes in probe heat transfer coefficient, is compensated for changes in resistance of the probe due to temperature changes of probe environment. The compensation is effected by means of a thermocouple 29 having a junction 2 near the probe, alternatively a thermistor and voltage source may be used. In an alternative embodiment Fig. 2 (not shown) the probe is supplied with a constant voltage and current variations are measured, the variations being temperature compensated as before. The probe heat transfer coefficient is determined from the relation K =VI<SP>2</SP>α 2 Re/(V-IRe)F where V, I are probe voltage, current, Re is probe resistance of reference temperature Te, α 2 is probe temperature coefficient of resistivity at Te and F is surface area of the probe.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US00246044A US3810009A (en) | 1971-10-06 | 1972-04-20 | Apparatus for measuring material fouling of a test specimen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1433803A true GB1433803A (en) | 1976-04-28 |
Family
ID=22929110
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1861873A Expired GB1433803A (en) | 1972-04-20 | 1973-04-18 | Fouling measuing device |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JPS4921191A (en) |
| CA (1) | CA968851A (en) |
| FR (1) | FR2181374A5 (en) |
| GB (1) | GB1433803A (en) |
| IT (1) | IT980109B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6288528B1 (en) | 1999-05-18 | 2001-09-11 | Alstom Power Inc. | Method and system for evaluating a condition of a combustion vessel |
| WO2001094876A1 (en) * | 2000-06-06 | 2001-12-13 | Alstom Power Inc. | Monitoring of fouling or of loss of material of heat transfer tubes in a combustion vessel by resistance measurements |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5444397Y2 (en) * | 1975-01-24 | 1979-12-20 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3609549A (en) * | 1970-06-15 | 1971-09-28 | Universal Oil Prod Co | Corrosion-measuring device |
-
1973
- 1973-03-19 CA CA166,394A patent/CA968851A/en not_active Expired
- 1973-04-05 IT IT4926573A patent/IT980109B/en active
- 1973-04-18 FR FR7314114A patent/FR2181374A5/fr not_active Expired
- 1973-04-18 GB GB1861873A patent/GB1433803A/en not_active Expired
- 1973-04-20 JP JP4425873A patent/JPS4921191A/ja active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6288528B1 (en) | 1999-05-18 | 2001-09-11 | Alstom Power Inc. | Method and system for evaluating a condition of a combustion vessel |
| WO2001094876A1 (en) * | 2000-06-06 | 2001-12-13 | Alstom Power Inc. | Monitoring of fouling or of loss of material of heat transfer tubes in a combustion vessel by resistance measurements |
Also Published As
| Publication number | Publication date |
|---|---|
| DE2320187B2 (en) | 1975-06-26 |
| DE2320187A1 (en) | 1973-10-25 |
| JPS4921191A (en) | 1974-02-25 |
| FR2181374A5 (en) | 1973-11-30 |
| IT980109B (en) | 1974-09-30 |
| CA968851A (en) | 1975-06-03 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |