Development and validation of a micro-fin tubes evaporator model using R134a and R1234yf as working fluids

Forced convective heat transfer and flow characteristics of ionic liquid as a new heat transfer fluid inside smooth and microfin tubes

“…The microfin tube was first developed by Fujie et al of Hitachi Cable [8]. Since then, many experimental and theoretical investigations had been extensively performed for convective condensation and boiling heat transfer in microfin tubes [9][10][11][12][13][14], and the phase change heat transfer enhancement mechanisms were presented. Compared to phase change heat transfer, experimental investigations of single phase heat transfer characteristics in microfin tubes are less reported.…”

Comparison of tubeside condensation and evaporation characteristics of smooth and enhanced heat transfer 1EHT tubes

“…They found that the condensation heat transfer coefficient for R1234ze(E), for the same mass flux and saturation temperature, is lower than those of R32 and comparable with the condensation heat transfer coefficient of R134a. Mendoza-Miranda et al [17] modeled a shell and tube evaporator with micro-fin tubes using R1234yf and R134a. Results of simulations indicate that the overall heat transfer coefficient of R1234yf is approximately 10% lower than that which is found for R134a.…”

Comparison of condensation and evaporation heat transfer on the outside of smooth and enhanced 1EHT tubes

“…They found that the condensation heat transfer coefficient for R1234ze(E) (for the same mass flux and saturation temperature) is lower than that of R32 and comparable with the condensation heat transfer coefficient of R134a. MendozaMiranda et al [29] modeled a shell and tube evaporator with micro-fin tubes using R1234yf and R134a. Results of simulations indicate that the overall heat transfer coefficient of R1234yf is approximately 10% lower than that which is found for R134a.…”