Effects of Heat Transfer Characteristics of R32 and R1234yf with Al₂O₃ Nanoparticle through U-Bend Tube Evaporator

Figure 14

Variation of heat transfer coefficient for vapor fraction of R1234yf at various temperatures and at various mass fluxes of (a) 60 kg/m²·s, (b) 85 kg/m²·s, and (c) 160 kg/m²·s.

(a)

(b)

(c)