Two-phase pressure drop of R-410A in horizontal smooth minichannels

Two phase flow pressure drop in multiport mini-channel tubes using R134a and R32 as working fluids

“…Once the multiplier is calculated, the two-phase frictional pressure drop is evaluated by means of the expression described in Table 5. Choi et al [19] proposed a modification of the Chisholm parameter for their experimental data considering the influence of inner diameter, surface tension, density and mass velocity, these parameters are included in dimensionless groups Reynolds and Weber numbers. Sun and Mishima [20] introduced a new correlation of the frictional pressure drop with 2092 data collected from 18 published papers.…”

“…Also a new equation for the friction factor in the homogeneous model was developed for each diameter tested, respectively. Choi et al [19] performed experiments to measure two-phase flow pressure drop in two horizontal stainless steel tubes with inside diameter of 1.5 mm and 3 mm and R410A as working fluid. They observed that two-phase flow pressure drop is strongly influenced by diameter and mass velocity, thus they developed a new equation of Chisholm parameter on the basis of Lockhart-Martinelli [14] method.…”

A Critical Review of Recent Investigations on Two-Phase Pressure Drop in Flow Boiling Micro-Channels

“…The two-phase pressure drop experiments similar to Choi et al (2008) were carried out by Pamitran et al (2008). The stainless steel tubes having diameters of 1.5 and 3 mm were used as test sections in which flow vapourization of CO 2 was established.…”

Pressure Drop and Boiling Heat Transfer Characteristics of R410A in Macro-Scale and Mini-Scale Channels

“…In order to bring out an overview to the reader, this chapter investigates the experimental results with the wide range of operating conditions as well as the tube diameters, which have been evaluated in our lab in the past [9][10][11] and recently. The influence of mass flux, heat flux and channel diameter on the heat transfer coefficient and pressure drop was well reported.…”