Two-phase frictional pressure drop with pure refrigerants in vertical mini/micro-channels

Environmental concerns have urged a search for eco-friendly refrigerants in the refrigeration industry to overcome ozone depletion and global warming problems. Therefore, current research emphasizes frictional pressure drop during flow boiling of environment-friendly (GWP<150), isobutane, HFC-152a, HFO-1234yf were tested against commonly reported HFC-134a. The data presented here was collected under heat flux-controlled conditions; test piece round tube (1.60 mm diameter). collection performed at 27 32 °C with mass velocities 50–500 kg/m2s range. Effects critical controlling parameters, like flux, velocity, exit vapor quality, operating medium, studied detail. It observed that increases along velocity increment quality increment. same noticed decrease saturation temperature Parametric effects prediction assessment methods are reported.