EXPERIMENTAL AND THEORETICAL STUDY OF TWO-PHASE HEAT PIPE
Main Article Content
Abstract
In this study, thermal characteristics of a two-phase closed heat pipe were investigated experimentally and theoretically. A two-phase closed heat pipe (copper container, Fluorocarbon FC-72 (C6F14) working fluid) was fabricated to examine its performance under the effect of input heat flux range of 250–1253 W/m2 , 70% fill charge ratio and various tilt angles. The temperature distribution along the heat pipe, input heat to evaporator section, and output heat from condenser were monitored. A comprehensive mathematical model was developed to investigate the steadystate heat transfer performance of a two-phase closed heat pipe. A steady state analytical model, is presented to determine important parameters on the design of two-phase closed heat pipe, including temperature levels and heat transfer coefficients for condenser and evaporator. The experimental and simulation results of this work are found in good agreement. The experimental boiling heat transfer coefficients were compared with existing previously reported correlations.
Article Details
How to Cite
Publication Dates
References
Andros F.E.; Heat transfer characteristics of the two-phase closed thermosyphon (wickless heat pipe) including direct flow observation; Ph.D. Dissertation, Arizona State University,1980. Azada E., Mohammadieha F., Moztarzadeh F. ;Thermal performance of heat pipeheat recovery system; Journal of Heat Recovery Systems;1985; V. 5 (6): pp. 561-570.
Basran T., Kücüka S.; Flow through a rectangular thermosyphon at specified wall temperatures; International Communications
in Heat and Mass Transfer; 2003;V. 30 (7) :pp. 1027–1039.
El-Genk M.S., Saber H.H.; Determination of operation envelopes for closed two-phase thermosyphons; Int. J. Heat Mass Transfer; 1999;V.42(5):pp.889–903.
Faghri A.; Heat pipe science and technology; First edition; Taylor & Francis, ISBN 978-1560323839, New York USA; 1995.
Fu H.D., Pei G., Ji J., Long H., Zhang T., Chow T.T.; Experimental study of a photovoltaic solar-assisted heat-pump/heatpipe system; Applied Thermal Engineering 40 (2012) 343-350.
Gershuni A., Nishchik A., Pysmennyy Y., Polupan G., Sanchez-Silva F., CarvajalMariscal I; Heat exchangers of the gas-gas type based on finned heat pipes; International Journal of Heat Exchangers; 2004;V.5 (2): pp. 347-358.
Hong S.H., Kim C.J., Park Y.J., Kang H.K.; An experimental study on the heat transfer characteristics of a FC-72 thermosyphon; 12th International Heat Pipe Conference, Moscow; 2002: pp. 308–314.
Incropera F., DeWitt D.; Fundamentals of heat and mass transfer; 3rd Edition, John Wiley and Sons, Inc., 1990.
Jialun H., Tongze M., Zhengfang Z.; Investigation of boiling liquid pool height of a two-phase closed thermosyphon; Proceeding ofthe Eighth International Heat Pipe Conference; Beijing China 1992: pp. 154–159.
Jiao B., Qiu L.M., Zhang X.B., Zhang Z.; Investigation on the effect of filling ratio on the steady-state heat transfer performance of
a vertical two-phase closed thermosyphon; Applied Thermal Engineering ; 2008; V.28 (11):pp.1417–1426.
Nemec P., Čaja A., Malcho M.; Mathematical model for heat transfer limitations of heat pipe; Mathematical and Computer Modelling 57 (2013) 126–136.
Nkwetta D.N., Smyth M., Zacharopoulos A., Hyde T.; In-door experimental analysis of concentrated and non-concentrated evacuated tube heat pipe collectors for medium temperature applications; Energy and Buildings 47 (2012) 674–681.
Noie S.H; Heat transfer characteristics of a two-phase closed thermosyphons ; Applied Thermal Engineering; 2005; V.25(4): pp. 495-506.
Noie S.H., Kalaei M.H. , Khoshnoodi M; Experimental investigation of a two phase closed thermosyphon; The 7th International Heat Pipe Symposium; 2003, October 12- 16, Jeju, Korea. Park J., Kang K., Kim J. ;Heat transfer characteristics of a two-phase closed thermosyphon to the fill charge ratio; International Journal of Heat and Mass Transfer;2002; V.45,(23): pp. 4655-4661.
Peterson G.P; An introduction to heat pipe modeling, testing, and applications; John Wiley& Sons, Inc., ISBN 978-0471305125, New York USA; 1994.
Pioro I.L.; Experimental evaluation of constants for the Rohsenow pool boiling correlation; International Journal of Heat and Mass Transfer;1998; V. 42(11): pp. 2003-2013.
Reay D.A; A review of gas-gas heat recovery systems; Journal of Heat Recovery Systems; 1981; V.1 (1): pp. 3-41.
Semena M.G. and Gerahmi A.N.; Investigation of the maximum heat transport capacity of heat pipe with matel fiber wicks; Teplofiz. vys. temp. 1978,16(5):pp.1060- 1068.
Shiraishi M., Kikuchi K., Yamarcishi T.; Investigation of heat transfer characteristics of a two phase closed thermosyphon; Heat Recovery Systems;1981; V.1: pp. 287 – 297.
Streltsov A.I.; Theoretical and experimental investigation of optimum filling for heat pipe; Heat Transfer Soviet Res; 1975; 7 (1):pp.23–27.
Witwit A.M.; A study of the gravity assisted and variable conductance heat pipes with an internal wall separating liquid and vapor phases; Ph. D. Thesis, Mech. Eng. Dept., College of Engineering, University of Baghdad, 1998.
Zuo Z.J., Faghri A. ;A network thermodynamic analysis of the heat pipe; International Journal of Heat and Mass Transfer;1998; V.41(11): pp. 1473-1484.