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

Figure 12

Variation of heat transfer coefficient for vapor fraction of R1234yf at various mass fluxes and at the temperatures of (a) 300 K, (b) 350 K, and (c) 400 K.

(a)

(b)

(c)