The Application of Capacitance Transducer for Measuring Local Thickness of Condensate Film in Low-Temperature Range Heat Pipes


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Abstract


A description is provided for the automated capacitance transducer for measuring local thickness of condensate film of the working fluid in short low-temperature range heat pipes. This paper presents the framework, calibration data for compact open capacitance sensors, and electronic equipment that enables to perform measurements of local thickness of the working fluid at the condensing surface inside the heat pipes. Time-averaged values of the condensate film thickness are measured, depending on the heat load on the capillary-porous evaporator. The measurement error does not exceed 2·10-3mm. It is demonstrated that the condensate film thickness lessens sharply with the increase of the heat load on the evaporator of a short low-temperature heat pipe, while the heat resistance of the film on the condensing surface reaches 60% of the total heat resistance of a short low-temperature heat pipe with the capillary-porous evaporator.
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Keywords


Heat Pipe; Compact Open Capacitance Sensor; Thickness of Condensate Film; Rotational Flow

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References


Seryakov, A., Pulsation Flow in the Vapour Channel of Short Low Temperature Range Heat Pipes, (2014) International Journal on Heat and Mass Transfer - Theory and Applications (IREHEAT), 2 (2), pp. 40-49.

Seryakov A.V., Ananiev V.I., Orlov A.V. Condensation research in the short low-temperature range heat pipes.//Proceedings of the 9th Minsk International Seminar of Heat Pipes, Heat Pumps, Refrigerators, Power Sources. Minsk, Belarus, 7-10 September 2015, v 2. p. 168-176.

Seryakov A.V., Ananiev V.I. Condensation research in the short low-temperature range heat pipes.//Proceedings of the VIII International Symposium on Turbulence, Heat and Mass Transfer. Sarajevo, Bosnia and Herzegovina, September 15-18 2015. Begell House Inc. p. 693-696.

Seryakov A.V., Konkin A.V. Numerical simulation of pulsations in vapour channel of low-temperature range heat pipes.//Proceedings of the 8th International Symposium on Turbulence, Heat and Mass Transfer. Sarajevo, Bosnia and Herzegovina, September 15-18, 2015. Begell House Inc. pp. 677-680.

Ducler E., Bergelin O.P. Characteristics of flow in falling liquid films. Chemical Engineering Progress 1952 v.48. pp 557-570.

Rogovaya А., Olevsky V.М., Rinova N.S. Measuring thickness and profiles of fluid film //Experiment devices and technique 1968. No. 1, pp. 189-192.

Ozgu M.R., Chen J.C. , Eberhardt N. A capacitance method for measurement of film thickness in two-phase flow // Review of Scientific Instruments 1973. v. 44. pp. 1714–1716.

Thorncroft G.E., Klausner J.F. A Capacitance sensor for two-phase fluid film thickness measurements in a square duct // Journal of Fluids Engineering. 1997. v. 119. No. 1. pp. 164–169.

Krotov S.V., Nazarov А.D., Pavlenko А.N., Pecherkin N.I., Serov А.F., Chekhovich V.Y. Capacitance gauge of local thickness of fluid film. Experiment devices and technique 1997. No. 1, pp. 149-152.

Alekseenko S.V., Nazarov А.D., Pavlenko А.N., Serov А.F., Chekhovich V.Y. Flow of cryogenic fluid film on a vertical surface // Thermal Physics Aeromechanics. 1997. v. 4, No. 3. pp. 307-317.

Alekseenko S.V., Nakoryakov V.Е., Pokusaev B.G. Wave flow of fluid films. Publishing house “Nauka”. Novosibirsk, 1992.-256 p.

Chen J.Z., Darhuber A.A., Troian S.M., Wagner S. Capacitive sensing of droplets for microfluidic devices based on thermocapillary actuation // The Royal Society of Chemistry. Lab Chip 2004. v.4. pp. 473-480.

Utility model patent No. 152108 / Capacitance sensor for determination of a fluid layer thickness / Seryakov A.V. Published on 27.06.2015. Bulletin No. 18/2015.

Seryakov A.V., Konkin А.V., Belousov V.K. Application of a jet steam nozzle in medium-temperature range heat pipes // Bulletin of Siberian State Aerospace University. 2012. Issue 1(41), pp. 142-147.

Seryakov A.V. Velocity measurements in the vapour channel of low-temperature range heat pipes// International Journal of Engineering Research & Technology 2013, v.2, No. 8, pp. 1595 – 1603.

Akhadov Y.Y. Dielectric properties of pure fluids. National Standard Reference Data Service guide.// Standartds. Moscow.:1972. 412 p.

Tables of physical values. Guide under the editorship of Kikoin I.K., the member of Academy of Science. Moscow: Atomizdat 1976. 1008 p.

Fernandes D.P., et all. A formulation for the static permittivity of water and steam at temperatures from 238K to 873K at pressures up to 120 MPa, including derivatives and Debye-Huckel coefficients // Journal of Phys and Chemistry Ref. Data 1997. v.26, pp.1125-1166.

Fernandes D.P., et all. A database for the static dielectric constant of water and steam // Journal of Physical and Chemistry Reference Data 1995. v.24, No. 1, pp.33-69.

Seryakov А.V. Changing the temperature by using thermistors // Bulletin of Siberian State Aerospace University 2013, Issue 1(47), pp.167-172.

Seryakov А.V. Enhancement of precision of temperature measurements using thermistors // Sensors and Systems. 2013, No. 1, pp. 38-42.

Seryakov A.V. A new method for temperature measurement using thermistors// International Journal of Engineering Research & Technology 2013, v.2, No. 7, pp. 444 – 454.

Seryakov A.V. A universal method for temperature measurement using thermistors// National Journal of Engineering and Technology Research. Academia Publishing. 2013, v.1(1), pp.014-020.

Shih T.H., Liou W.W., Shabbier A., Yang Z., Zhu J. A new k-ε eddy-viscosity model for high Reynolds number turbulent flow-model development and validation//Computers and Fluids.1995 v.24, No. 3, pp.227-238.


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