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

Figure 3

Variation of heat transfer coefficient for vapor fraction of R32 at various mass fluxes at (a) 300 K, (b) 350 K, and (c) 400 K.

(a)

(b)

(c)