Effect of applied EHD on in-tube condensation of R-134a within an assembled experimental rig including a laboratory heat exchanger

摘要: Abstract Effects of applied EHD 1 on in-tube condensation R-134a refrigerant in a double pipe heat exchanger are experimentally investigated to present applicability the technique vertical position. The refrigerant’s vapor was flowed inside inner tube and cooling water counter currently annulus section. Tests were performed at different mass flow rates 35–65 kg/m2 s electrical field strengths (0–8 kV), under their identified breakdown for two various electrode diameter sizes (4 6 mm), while average saturation temperature 43 33 °C respectively. Experimental results demonstrate remarkable potential utilizing enhance transfer. It is concluded that enhancement driven by effective removal condensate through induced liquid extraction dispersion phenomena. For presence electrodes, experimental indicate maximum transfer ER 2 around 14% 31% respectively electrodes with 4 mm (10.7 mm gap) 6 mm (9.7 mm gap), power expenditure negligible.