Measurements of local condensation heat transfer coefficient made in a test section fabricated with additive manufacturing

The evaluation of the local heat transfer coefficient during condensation is particularly challenging due to the difficulties in obtaining precise measurements of the coefficient in two-phase flow regimes, especially when testing micro and mini-channels. By starting with measurements of the local heat flux and directly measuring the water and wall temperatures, this thesis provides experimental results on the local heat transfer coefficient during the condensation of two low-GWP refrigerants (R1233zd(E) and R1234ze(E)) inside an aluminum micro-channel fabricated with the Additive Manufacturing technique. The obtained results are analyzed and adopted to assess well-established correlations available in the literature.