In this study, the condensation heat transfer of R410A flowing inside a flat aluminum multi-port minichannels is investigated. The multi-port minichannels test tubes have 7 channels with a 1.16mm hydraulic diameter are designed as a counterflow tube in tube exchanger. The experiment is performed with mass fluxes of refrigerant between 50-500 kg/m~2s, with 3-15kW/m~2 of heat fluxes, and saturation temperature of 48°C. The average heat transfer coefficient increased with the increase of vapor quality, mass flux, and heat flux. The experimental data are compared with existing correlations, and the data of high mass flux agree with the existing correlation, while those of low mass flux show different trends. The correlation is modified a good agreement with the experimental data of this study.
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