Daoming Shen1,*, Xia Zhang1, Wei He1, Jinhong Xia1, Songtao Xue2
FDMP-Fluid Dynamics & Materials Processing, Vol.16, No.6, pp. 1259-1272, 2020, DOI:10.32604/fdmp.2020.010951
Abstract Experiments about heat transfer in the presence of a two-phase flow due
to the condensation of a R1234yf refrigerant have been performed considering a
smooth tube and two micro-fin tubes. The following experimental conditions have
been considered: Condensation temperatures of 40°C, 43°C and 45°C, mass
fluxes of 500–900 kg/(m2
·s), vapor qualities at the inlet and outlet of the heat
transfer tube in the ranges 0.8–0.9 and 0.2–0.3, respectively. These tests have
shown that: (1) The heat transfer coefficient increases with decreasing the condensation temperature and on increasing the mass flux; (2) The heat transfer coeffi-
cient inside the micro-fin… More >
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