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The paper presents an experimental study of boiling on heating surfaces covered with copper fibrous porous layers used as a filling of heat pipes. The knowledge of thermal characteristics of capillary-porous structures is indispensable in the design and construction of heat exchangers utilizing the concept of heat pipes. Experiments were carried out for pool boiling of distilled water, ethanol, refrigerant R-123 and refrigerant R-113 on lavers of 40, 70 and 85 % porosity. Porous surface significantly enhances heat transfer in comparison to a smooth one. Among four different types of hysteresis observed, a new one of h-type was discovered. It can be applied to control the temperature of the heating surface.
Słowa kluczowe
Czasopismo
Rocznik
Tom
Strony
37--54
Opis fizyczny
Bibliogr. 10 poz.,Rys., tabl.,
Twórcy
autor
- Kielce University of Technology, Al. Tysiąclecia Państwa Polskiego 7, 25-314 Kielce
Bibliografia
- [1] MALYŠENKO S. P.: Heat transfer phenomena during boiling on surfaces with coatings, Teploenergetika, 1991, No. 2, 38-45, (in Russian). porous
- [2] PONIEWSKI M. E., WÓJCIK T. M.: Experimental investigation of boiling heat transfer hysteresis on metal fibrous porous coverings, Arch. of Thermodynamics, Vol. 20(1999), No. 1-2, 93-118.
- [3] AFGAN N. W, JOVIČ L. A., KOVALEV S.A., LENKOV V. A.: Boiling heat transfer from surfaces with porous layers, Int. J. Heat Mass Transfer, Vol. 28(1985), 415-21.
- [4] ANDRIANOV A.B., MALYŠENKO S. P.: Influence of porous coating characteristics on boiling heat transfer, Izv. AN SSSR, Energetika i Transport, 1989, No.1, 139-49, (in Russian).
- [5] TEHVER JA. CH.: Hysteresis phenomena during boiling on porous coatings, Teploenergetika, 1990, No. 12, 12-4, (in Russian).
- [6] KOVALEV S. A., LEN'KOV V. A.: Critical heat flux on porous coatings, Teploenergetika, 1981, No. 4, 8-11, (in Russian).
- [7] PONIEWSKI M. E., WIŚNIEWSKI M. L., WÓJCIK T. M.: Probabilistic model of boiling heat transfer in thin-layered porous structures, Arch. of Thermodynamics, Vol. 21(2000), No. 3-4, 55-73.
- [8] SEMENA M. G., GERŠUNI A. N., ZARIPOV V. K.: Heat pipes with fibrous capillary structures, Visshaya Shkola, Kiev, 1984, (in Russian).
- [9] PAWŁOWSKI Z.: Introduction to Mathematical Statistics, PWN, Warszawa 1966, (in Polish).
- [10] WÓJCIK T. M., PONIEWSKI M. E.: Means of heat transfer surface thermostabili sation under conditions of substantial and changeable thermal loads, Patent Application No. P351 455/2001 of 31st Dec. 2001, the Patent Office of the Republic of Poland.
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-article-BGPK-0638-2859