期刊
EXPERIMENTAL HEAT TRANSFER
卷 30, 期 3, 页码 179-191出版社
TAYLOR & FRANCIS INC
DOI: 10.1080/08916152.2016.1233145
关键词
air bubble injection; shell and coiled tube heat exchanger; Nusselt number; effectiveness
Air bubble injection was employed to increase the heat transfer rate (Nusselt number) of a vertical shell and coiled tube heat exchanger in this article. Hot and cold water flowed into the coil side and shell side of heat exchanger, respectively, and air bubbles were injected inside the shell side of heat exchanger via a memorable method. Bubbles' vertical movement due to buoyancy forcing through the heat exchanger can enhance the heat transfer rate by mixing the thermal boundary layer, increasing the turbulence level of the fluid flow and increasing the shell-side fluid Reynolds number.
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