An experimental study on evaporative heat transfer characteristics in a micro-fin tube has been performed. The micro-fin tube with outer diameter of 9.52 mm was used as teat section, and it was heated by applying hot liquid to the test tube. The refri...
An experimental study on evaporative heat transfer characteristics in a micro-fin tube has been performed. The micro-fin tube with outer diameter of 9.52 mm was used as teat section, and it was heated by applying hot liquid to the test tube. The refrigerant v as R-22 and the tube-circular electrode system was used. The DC voltage was applied to the circular electrode, while the tube was grounded. Experiments were conducted at mass fluxes of 50kg/m²s, 100kg/m²s, and heat flux of 5kW/m². For each mass flux condition, evaporation temperature was set at 5°C. The inlet quality was changed from 0 to 0.5. The results showed the enhancement of the evaporative heat transfer cnefficient of the tube was largely increased under the high voltage, compared with that of the normal condition(0kV), With increasing the mass flux and inlet quality, the pressure drop increased linearly.