EHD-assisted external condensation of R-134a on smooth horizontal and vertical tubes

摘要: Abstract In this paper, results of an experimental study on the EHD-assisted external condensation R-134 over a plain tube will be presented and discussed. The experiments performed can divided into two groups: (1) vertical smooth (2) horizontal tube. each case, were conducted as function parametric values such heat flux, electrode gaps applied electric field potential. All using specially designed helical with R-134a working fluid. Experimental demonstrate remarkable potential in utilizing EHD to enhance transfer. It is concluded that enhancement driven by effective removal condensate through EHD-induced liquid extraction dispersion phenomena.