Abstract
In this paper, the condensation heat transfer characteristics of parallel flow and counter flow inside an inclined wave-finned flat tube is investigated experimentally. The condensation heat transfer coefficients are analyzed based on the experimental results. Results of experiments show that condensation heat transfer coefficient decreases as the temperature difference Δt=ts—tw increases and mass flow rate decreases. The parallel flow has a similar development with the counter flow, and the condensation heat transfer coefficient of counter flow is less than that of parallel flow under the same air cooling conditions. In addition, condensation heat transfer coefficient correlations are also obtained under experimental ranges. The calculations agree well with the measured data and the agreement is seen to be within ±4% for the parallel flow and ±5% for the counter flow.
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