Experimental Study of Heat Transfer Enhancement in Pool Boiling by Using 2-Ethyl 1-Hexanol an Additive

Abstract:

The addition of additives to the water is known to enhance boiling heat transfer. In the present investigation, boiling heat transfer coefficients are measured for Nichrome wire, immersed in saturated water with & without additive. An additive used is 2-Ethyl 1-Hexanol with varying concentrations in the range of 10-10000 ppm. Extensive experimentation of pool boiling is carried out above the critical heat flux. Boiling behavior i.e. bubble dynamics are observed at higher heat flux for nucleate boiling of water over wide ranges of concentration of additive in water. Results are encouraging and show that a small amount of surface active additive makes the nucleate boiling heat transfer coefficient considerably higher, and that there is an optimum additive (500-1000ppm) concentration for higher heat fluxes. An optimum level of enhancement is observed up to a certain amount of additive 500-1000ppm in the tested range. Thereafter significant enhancement is not observed. This enhancement may be due to change in thermo-physical properties i.e. mainly due to a reduction in surface tension of water in the presence of additive.

• Periodical: Applied Mechanics and Materials (Volumes 592-594)
• Pages: 1601-1606
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.592-594.1601
• Online since: July 2014
• Authors: Sameer Sheshrao Gajghate*, Anil R. Aacharya, Anil T. Pise, Ganesh S. Jadhav
• Keywords: Additive, Bubble Behavior, Pool Boiling, Surface Tension, Surfactant

References

[1] .

[1] Inoue, T., Teruya, Y., and Monde, M., Enhancement of Pool Boiling Heat Transfer in Water & Ethanol/Water Mixtures With Surface Active Agent,. International Journal of Heat and Mass Transfer, Vol. 4, pp.5555-5563, (2004).

DOI: 10.1016/j.ijheatmasstransfer.2004.05.037

[2] Hetsroni, G., Gurevich, M., Mosyak, A., Rozenblit, R., and Segal, Z., Boiling Enhancement with Environmentally Acceptable Surfactants,. International Journal of Heat and Fluid Flow, Vol. 25, pp.841-848, (2004).

DOI: 10.1016/j.ijheatfluidflow.2004.05.005

[3] Dj.M. Maric, P.F. Meier and S.K. Estreicher: Mater. Sci. Forum Vol. 83-87 (1992), p.119.

[2] M.A. Green: High Efficiency Silicon Solar Cells (Trans Tech Publications, Switzerland 1987).

[3] Y. Mishing, in: Diffusion Processes in Advanced Technological Materials, edtied by D. Gupta Noyes Publications/William Andrew Publising, Norwich, NY (2004), in press.

[4] G. Henkelman, G. Johannesson and H. Jónsson, in: Theoretical Methods in Condencsed Phase Chemistry, edited by S.D. Schwartz, volume 5 of Progress in Theoretical Chemistry and Physics, chapter, 10, Kluwer Academic Publishers (2000).

[5] R.J. Ong, J.T. Dawley and P.G. Clem: submitted to Journal of Materials Research (2003).

[6] P.G. Clem, M. Rodriguez, J.A. Voigt and C.S. Ashley, U.S. Patent 6, 231, 666. (2001).

[7] Information on http: /www. weld. labs. gov. cnA uracher, H., and Buchholz, M., Experiments on the Fundamental Mechanisms of Boiling Heat Transfer,. ABCM Journal of the Brazilian Society of Mechanical Science & Engineering, Vol. XXVII, No. 1, January-March, (2005).

[4] Hetsroni, G., Pogrebnyak, E., Sher, I., Mosyak, A. and Segal, Z., Bubble Growth in Saturated Pool Boiling in Water & Surfactant Solution,. International Journal of Multiphase Flow, Vol. 32, October, p.159–182. (2005).

DOI: 10.1016/j.ijmultiphaseflow.2005.10.002

[5] Kotchaphakdee, P. and Williams, Michael C., Enhancement of Nucleate Pool Boiling with Polymeric Additives,. International Journal of Heat and Mass Transfer, Vol. 13, pp.835-848, (1970).

DOI: 10.1016/0017-9310(70)90129-8

[6] S. G. Kandlikar, A Theoretical Model to Predict Pool Boiling CHF Incorporating Effects of Contact Angle and Orientation, Int. J. Heat Mass Transf., vol. 123, p.1071–1079, (2001).

DOI: 10.1115/1.1409265

[7] Nukiyama, S, The Maximum & Minimum Values of Heat Transmitted From Metal to Boiling Water Under Atmospheric Pressure,. Journal of Japan Society of mechanical Engineering, Vol. 37, p.367. (Translation: 1966, International Journal of Heat & mass transfer, Vol. 9, p.1419), (1934).

DOI: 10.1016/0017-9310(66)90138-4

[8] Barbuto, E., Gesecki, C., Lubers, A., Ryan, M., Shaughnessy, T., and Yaniglos, T., The Dielectric Slide: the Group Nine Power Hour,. 06-363 Transport Processes Laboratory, Carnegie Mellon University, 16th May, (2007).

[9] Z. Yuan, K. E. Herold. Surface tension of pure water and aqueous lithium bromide with 2-ethyl hexanol, Applied thermal Engg. Vol. 21, pp.881-897, (2001).

DOI: 10.1016/s1359-4311(00)00088-0