ANALISA TRANSFER PANAS PADA KONDENSASI LUAR DENGAN MENGGUNAKAN REFRIGERANT R-134a
DOI:
https://doi.org/10.21776/jrm.v13i2.998Keywords:
Outside Condensation, Horizontal Tube, R-134a, Heat Transfer, Low Surface Tension FluidAbstract
An experimental study in condensation has been conducted to analyse the condensation phenomena. The enhancement heat transfer performance is as always highlighted phenomenon for being investigated. The modified surface is a common method for enhancing the performance of condensation since inducing the droplet on the surface. The droplet leads to increasing heat-transfer area, decreasing thermal resistance, and shorten the condensing cycle. The condensation by using water successfully induces droplets on the surface and enhances the heat transfer. But water and refrigerant have different fluid properties which induce different phenomena whereas refrigerant is widely used in industry. In this case, the condensation is conducted on the modified surface by using a commercial promotor to investigate the phenomena. The investigation results show that the surface tension immensely influences the condensate on the surface. Refrigerant is low surface tension fluid which leads to the difficulty of fluid for inducing droplets and almost no enhancement heat transfer performance since the results almost fitted well to Nusselt bare tube prediction around 2443-3063 W/m2 oC with subcooled temperature 2 up to 5 oC.
References
VIDIYANTO, B.P., ARYADI, W., KHOIRON, A.M., dan ANIS, S., “Pengaruh Penggunaan Fan dan Debit Fluida terhadap Efisiensi Kerja Atmospheric Water Generator,” J. Rekayasa Mesin, vol. 10, no. 2, pp. 105–112, 2019, doi: 10.21776/ub.jrm.2019.010.02.1.
L. WANG, P. CHEN, Y. ZHOU, W. LI, C. TANG, dan Y. MIAO, “Experimental Study on the Condensation of Steam With Air Out of the Vertical Tube Bundles,” vol. 6, no. May, pp. 1–6, 2018, doi: 10.3389/fenrg.2018.00032.
ALI, H., KAMRAN, M.S., ALI, H.M., and IMRAN, S., “Condensation Heat Transfer Enhancement Using Steam-Ethanol Mixtures on Horizontal Finned Tube,” Int. J. Therm. Sci., vol. 140, no. January, pp. 87–95, 2019, doi: 10.1016/j.ijthermalsci.2019.02.033.
SAJJAN, S.K., KUMAR, R., and GUPTA, A., “Experimental Investigation of Vapor Condensation of R-600a Over Horizontal Three-Dimensional Integral-Fin Tubes,” Int. J. Therm. Sci., vol. 153, no. February, p. 106378, 2020, doi: 10.1016/j.ijthermalsci.2020.106378.
JI, W.T., MAO, S.F., CHONG, G.H., ZHAO, C.Y., ZHANG, H., and TAO, W.Q., “Effect of Fin Structure on the Condensation Of R-134a, R-1234ze(E), And R-1233zd(E) Outside the Titanium Tubes,” J. Heat Transfer, vol. 142, no. 1, Nov. 2019, https://doi.org/10.1115/1.4045139
HE, H., et al., “Heat Transfer Enhancement of a Loop Thermosyphon with a Hydrophobic Spot-Coated Surface,” J. Therm. Sci. Technol., vol. 13, no. 1, pp. 1–17, 2018, doi: 10.1299/jtst.2018jtst0011.
QI, B., ZHOU, J., WEI, J., and LI, X., “Study on the Wettability and Condensation Heat Transfer of Sine-Shaped Micro-Grooved Surfaces,” Exp. Therm. Fluid Sci., vol. 90, no. September 2017, pp. 28–36, 2018, doi: 10.1016/j.expthermflusci.2017.09.002.
TRIPATHY, A., et al., “Ultrathin Lubricant-Infused Vertical Graphene Nanoscaffolds for High-Performance Dropwise Condensation,” ACS Nano, vol. 15, no. 9, pp. 14305–14315, 2021, doi: 10.1021/acsnano.1c02932.
WEN, R., ZHOU, X., PENG, B., LAN, Z., YANG, R., and MA, X., “International Journal of Heat and Mass Transfer Falling-Droplet-Enhanced Filmwise Condensation In the Presence of Non-Condensable Gas,” Int. J. Heat Mass Transf., vol. 140, pp. 173–186, 2019, doi: 10.1016/j.ijheatmasstransfer.2019.05.110.
ZHAO, Y., Dropwise Condensation of Water and Low Surface Tension Fluids on Structured Surfaces, Thesis M.Sc., Massachusetts Institute of Technology, USA, 2018.
HO, J.Y., RABBI, K.F., SETT, S., WONG, T.N., and MILJKOVIC, N., “Dropwise Condensation of Low Surface Tension Fluids on Lubricant-Infused Surfaces: Droplet Size Distribution and Heat Transfer,” Int. J. Heat Mass Transf., vol. 172, pp. 16–20, 2021, doi: 10.1016/j.ijheatmasstransfer.2021.121149.
GU, S., et al., “An Experimental Study on the Flow Characteristics During the Leakage of High Pressure CO2 Pipelines,” Process Saf. Environ. Prot., vol. 125, pp. 92–101, 2019, doi: 10.1016/j.psep.2019.03.010.
SHAMSABADI, H., RASHIDI, S., ESFAHANI, J.A., and KESHMIRI, A., “Condensation in the Presence of Non-Condensable Gases in a Convergent 3D Channel,” Int. J. Heat Mass Transf., vol. 152, p. 119511, 2020, doi: 10.1016/j.ijheatmasstransfer.2020.119511.
CAO, J., PEI, G., BOTTARELLI, M., CHEN, C., JIAO, D., and LI, J., “Effect of Non-Condensable Gas on the Behaviours of a Controllable Loop Thermosyphon Under Active Control,” Appl. Therm. Eng., vol. 146, pp. 288–294, 2019, doi: 10.1016/j.applthermaleng.2018.09.132.
S. KIM and K. J. KIM, “Dropwise Condensation Modeling Suitable for Superhydrophobic Surfaces,” J. Heat Transfer, vol. 133, no. 8, p. 081502, 2011, https://doi.org/10.1115/1.4003742 .
Downloads
Published
Issue
Section
License
Copyright (c) 2022 Hadi Rahmad, Zulfa Khalida, Saiful Arif
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.
