查看更多>>摘要：Subcooled flow boiling using water as working fluid is a common combination on heat exchangers and cooling systems. However, parameters as oxidation on the heat transfer surface affects directly the heat flux performance. In this research, an experimental investigation was conducted using a cooper bare surface as a heating surface under a mass flux of 600 kg·m~2·s~(-1) of distillate water at a subcooled inlet temperature of 70 K on a closed-loop at atmospheric pressure. The experiment was repeated using three different surfaces (new bare surface, polished surface, and oxidized surface) Results shows an increase in the wall superheat of around 10 K and a decrease in the heat flux of around 200 KW·m~(-2) on the flow boiling region, however, the influence of the oxidation on the single-phase heat flux is almost marginal. Bubble behavior and flow pattern were recorded using a high-speed camera.
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